Dist Boards

21

distribution boards and enclosures

Contents

Type tested assemblies page 22

Internal separation page 23

Safe working page 24

Earthing arrangements page 25-26

Type ‘A’ distribution boards page 27-28& enclosures

Non-standard configurations page 29

Type ‘A’ enclosures page 30-31-32dimensions

Invicta 63Mk2 TP&N distribution board

Dimensions and data page 33-34-35

Circuit protective device page 36selector chart

Incoming devices page 37

Extension boxes page 37-38

Invicta Panelboards

Dimensions & data page 39-40-41

Incoming and page 42outgoing devices

Extension boxes page 43

Meter packs page 44

Prospective fault current page 45-46

Fault current page 47assessment chart

Harmonics page 48

22

distribution boards and enclosures -type tested assemblies

IntroductionThe Harmonised Standard to which consumer units, distributionboards and panelboards are manufactured is BS EN 60439. Thetitle of this Standard is ‘Specification for low voltage switchgearand control gear assemblies’. Part 1 covers the general requirements. BS EN 60439-1 defines a Type TestedAssembly as:

“A low voltage switchgear and control gear assembly conformingto an established type or system without deviations likely toinfluence the performance from the typical Assembly verified tobe in accordance with this Standard”.

Furthermore, an ‘Assembly’ is defined as: “A combination of oneor more low voltage switching devices together with associatedcontrol, measuring, signalling, protective, regulating equipmentetc., completely assembled under the responsibility of the manufacturer with all the internal electrical and mechanical interconnections and structural parts”.

This means in practice that the design of the assembly by themanufacturer has been tested with all its components fitted andhas met the criteria of acceptance by the Type Tests in the standard. These tests are for:

• Temperature rise limits

• Short circuit withstand capabilities

• Degrees of protection against ingress of liquids and solidbodies (BS EN 60529)

• Clearance and creepage distances (to prevent flashover)

• Mechanical operation of moving parts

• Dielectric properties of insulating materials used

• Effectiveness of circuit protection.

It is a requirement that products used within the assembly meettheir own specific product standard e.g. BS EN 60947-3 forswitch disconnectors.

The aim of these tests is to verify inherent design safety. Testingis performed on sample assemblies and not routinely carried outon products to be put into service. Routine tests are carried outas part of a production quality assurance process and are aimedat detecting any faulty workmanship or materials. Routine testsare non-destructive, as limits of performance are not in questionat this stage. Despite the fact that all these tests are carried outthe installer of such equipment on site must still inspect and testequipment as required by part 7 of BS 7671. Manufacturers arenot required to test every possible configuration of products thatcould be used in an assembly, but to test the most onerous.Manufacturers may also have products independently tested andcertificated e.g. ASTA certification

Where distribution boards are used in configurations other thanthose manufactured and supplied as standard by the manufacturer, then BS EN 60439 recognises the use of PartiallyType Tested Assemblies (PTTA). These are defined as follows:

“A low voltage switchgear and control gear assembly, containingboth type tested and non-type tested arrangements provided thelatter are derived (e.g. by calculation) from type tested arrangements which have complied with the relevant tests”.

All devices used in such assemblies will be required to meettheir own product standards and be fully type tested.Arrangements of fully type tested products in an otherwiseuntested assembly are not covered by this definition in theStandard. The application of PTTA relates to modular productsand accessories produced by a manufacturer that are installed inDIN rail enclosures or standard configured distribution boards,such that a customised assembly can be produced to meet theneeds of a particular installation. Clearly, any such assembly onsite must be carried out in accordance with the manufacturer’sinstructions.

Part 3 of the Standard, BS EN 60439-3, deals with the particularrequirements for low voltage switchgear and control gear assemblies intended to be installed in places where unskilledpersons have access to their use. This covers the supplementaryrequirements for enclosure distribution boards suitable for indooruse containing protective devices intended for use either indomestic applications or other locations where unskilled personshave access. Control and/or signalling devices may also beincluded.

These distribution assemblies are for use on AC supplies, with anominal voltage to earth not exceeding 300V. The outgoing circuits include short circuit protective devices, each having arated current not exceeding 125A with a total incoming load current not exceeding 250A.

In the UK, such equipment is referred to as a ‘Consumer Unit’and as such is covered by this Standard. However, additionalrequirements from annex ZA of the standard call for the assembly to have an additional test; this is known as the ‘conditional withstand test’. The condition is that the consumerunit must withstand a 16kA short circuit fault when protected bya 100A HRC fuse to BS 1361 type II. Further requirements areaddressed by this annex:

• Means of isolation to be via a manual double pole switch disconnector

• Rated current of consumer unit is determined by current rating of incoming device.

• Outgoing protective devices can be MCB’s, Fuses and/orRCBO’s.

* No diversity factors are applicable to consumer units, theincoming circuit and the bus-bar system must be able to carrytheir full rated current without exceeding the temperature riselimits.

23

distribution boards and enclosures - internal separation

Internal separationThe internal separation of assemblies is described in BS EN 60439, and is concerned with three main requirementswhich can be met by the suitable arrangement of barriers and/orpartitions within the enclosure:

• Protection against contact with live parts belonging to adjacent functional units

• Limitation of the possibility of initiating and spreading arcingfaults

• Prevention of the passage of solid bodies from one unit of anassembly to an adjacent unit

BS EN 60439-1 also takes account of those situations where it isnecessary, for reasons of operation, to gain access to the interiorof an assembly whilst it is still live. Four forms of internal separation of circuits barriers or partitions fitted within anassembly are specified in clause 7.7.

When access to the interior of an assembly is required by skilledpersons for the purpose of adjustment or maintenance, etc., thefirst objective should be to isolate the assembly from thesupply before gaining access. In these situations, a Form 1type of assembly (no internal separation) is suitable unless internal separation is required for other reasons, e.g. to minimisethe probability of initiating arc faults.

Where isolation is not reasonably practical for such opera-tions then consideration needs to be given to the specification ofan assembly with a higher degree of internal separation, preferably Form 4. Otherwise additional temporary barriers orscreens would be required to protect skilled persons from inadvertent direct contact when working within the assembly”.

Working safely in a live assembly is a sensitive issue, in the UKthe requirements of the Electricity at Work Regulations 1989must be complied with.

Forms of separationmain criteria sub criteria form type of constructionno separation form 1

separation of busbars from the terminals for external conductors type 1 busbar separation is achieved by insulated

functional units. not separated from busbar form 2 coverings , e.g. sleeving wrapping or coating

terminals for external conductors

separated from busbar type 2 busbar separation is by metallic or

non-metallic rigid barriers or partitions

separation of busbars from the terminals for external conductors form 3a

functional units and separation not separated from busbar

of all functional units from one terminals for external conductors form 3b type 1 busbar separation is achieved by insulated

another Separation of the terminals separated from busbar coverings, e.g. sleeving, wrapping or coatings

for external conductors from thefunctional units, but not from each type 2 busbar separation is by metallic or non-metallic rigid

other barriers or partitions

separation of busbars from the terminals for external conductors type 1 busbar separation is achieved by insulated

functional units and separation of all in the same compartment as the coverings, e.g. sleeving wrapping or coating

functional units from one another associated functional unit form 4

including the terminals for external type 2 busbar separation is by metallic or non-metallic rigid

conductors which are an integral barriers or partitions cables may be glanded

part of the functional unit elsewhere

type 3 all separation requirements are by metallic or

non-metallic rigid barriers or partitions the

termination for each functional unit has it’s own

integral glanding facility

terminals for external conductors type 4 busbar separation is achieved by insulated

not in the same compartment as coverings, eg sleeving, wrapping or coatings.

the associated functional unit but Cables may be glanded elsewhere

in individual, separate, enclosed

protected spaces or compartments type 5 busbar separation is by metallic or non-metallic rigid

barriers or partitions. Terminals may be separated

by insulated coverings and glanded in common

cabling chamber(s)

type 6 all separation requirements are by metallic or

non-metallic rigid barriers or partitions. Cables are

glanded in common cabling chamber(s)

type 7 all separation requirements are by metallic or non

metallic rigid barriers or partitions. The termination

for each functional unit has its own integral glanding

facility.

Table 1

24

distribution boards and enclosures - safe working

Safe workingWorking safely in part of an Assembly with adjacent live sectionscannot be ignored when considering forms of separation.

First and foremost within the UK, the requirements of The electricity at Work Regulations 1989 must be complied with.Regulation 14 is particularly pertinent and requires that:

“No person shall be engaged in any work activity on or so nearany live conductor ( other than one suitably covered with insulating material so as to prevent danger) that danger mayarise unless:

(a) it is unreasonable in all the circumstances for it to be dead;and

(b) it is reasonable in all the circumstances for the person to beat work on or near it while it is live; and

(c) suitable precautions (including where necessary the provisionand use of protective equipment have been taken to preventinjury”

Regulation 4(4) in particular also applies to the provision and useof protective equipment. Effectively this means that where liveworking is being contemplated a risk assessment and judgementmust be made for every situation by the “Duty Holder”.This musttake account of all relevant factors, some of which include:

• the effectiveness of isolating the Assembly,

• the skill level of the personnel carrying out the work

• the level of separation within the Assembly

• the suitability of the separating barriers within the Assemblyfor the task being considered,

• the effectiveness of using temporary protective measures

• use of the correct tools, instruments and other work equipment

• use of warning signs, etc.

Switchboard manufacturers therefore cannot give all-embracingassurances for safe working, according to the form of separationwith parts of the Assembly energised. Specifying a particularform of separation will not guarantee this for any given Formnumber. It can only be provided on a case by case basisdepending on the work to be done. This is recognised fully in theStandard and requires a separate agreement betweenManufacturer and User, as detailed in clause 7.4 and Annex E.

Note: for further reference see HSE publication Electricity at Work SafeWorking Practices HSG85.

Using a Type Tested Assembly (TTA) offers many advantages.Some relate to longer term requirements while others assist inmeeting statutory obligations.

Confidence Low-voltage Assemblies, by the nature of their application, maybe installed for many years before they are called on to operateclose to their intended capability, for example, under plannedexpansion or fault conditions. As a result, any marginal performance in the design may not be evident immediately.

With a TTA concerns of this nature are eliminated. The design isproven through comprehensive Type Testing and there are nosubjective elements in the design verification process. This is aninvaluable attribute in user confidence.

Low-voltage Directive The Electrical Equipment (Safety) Regulations 1994, betterknown as ‘The Low-voltage Directive’ requires all electricalequipment to be safe in its intended use. As Low-voltageswitchgear has a basic safety function it must not only be safeto use, but must also be capable of performing its safety relatedduties in respect of problems elsewhere, in effect a doubleresponsibility. If challenged by the enforcing authorities, all manufacturers and * Duty Holders must be able to demonstratethey have met their obligations in respect of this onerous andstatutory duty.

There are several routes to demonstrating compliance, but themost readily and widely used is through unquestionable conformance to appropriate Mandated Standards. In the case ofLow-voltage Assemblies, this is covered by BS EN 60439 - 1,with TTA being the less subjective option. This removes anydoubts relating to design performance and provides theassurance this Act requires.

* Duty Holder The term used within the Electricity at WorkRegulations 1989 to refer to the person appointed to beresponsible for the electrical equipment, systems and conductors and any work or activities being carried out on ornear electrical equipment. The Duty Holder must be competent and may be the employer, or a self-employed person.

Electricity at Work Regulations 1989All manufacturers of Low-voltage Assemblies and Duty Holdersresponsible for their use, are obligated by these Statutory SafetyRegulations. The provision and use of TTAs through testeddesigns, assists in demonstrating compliance with the followingtwo Regulations:

Regulation 4 (1):‘All systems shall at all times be of such construction as to prevent, so far as is reasonably practical, danger.’

Regulation 5:‘No electrical equipment shall be put into use where itsstrength and capability may be exceeded in such a way asmay give rise to danger.’

It is therefore advantageous and prudent to use a TTA wheneverpractical.

Commercial ConsiderationsTTAs are of a proven design. Their design costs are high, but arerecouped over time through efficient use of manufacturingprocesses and materials. The closer the PTTA (Partially TypeTested Assembly) is to a TTA, then design for the particularAssembly is minimised.

Marketing information shows that TTAs are the same price as anequivalent PTTA for the majority of applications. Overall the TTAis therefore a more attractive option..

25

distribution boards and enclosures -earthing arrangements

Electrical installations in the UK generally have one of the following earthing arrangements - TN-S, TN-C-S or TT.

TN-S earthing arrangement

TN-C-S earthing arrangement

TT earthing arrangement

One of the first considerations when selecting a distributionboard is the earthing arrangement of the installation.

A system of letters is used to determine the earthing arrangement on a Low-voltage (LV) network

The first letter defines the earth connection of the supply transformer’s secondary winding.

T = earthed

I = insulated from earth

The second letter defines how the installation is connected toearth

T = earthed

N = connected to neutral

Third and fourth letters may also be used to indicate how theinstallation wiring is earthed.

C = combined neutral and earth throughout the installation

S = separate neutral and earth throughout the installation

C-S = separate neutral and earth throughout the installation, but combined at the cutout.

Less common arrangements are TN-C & IT. These tend only tobe used on specialised installations.

TN-S Earthing ArrangementThe LV network cables on TN-S systems have separate earthand neutral conductors and are usually routed underground; thecable has a lead sheath that is grounded at the supply transformer. TN-S systems are mainly found in older propertiesin urban locations and were the most common arrangement usedbefore PME systems. (See TN-C-S Earthing Arrangements). Theutility supply company will usually allow the installation earthingconductor to be connected to the lead sheath of the supplycable by a suitable clamp. To facilitate inspection and testing theconnection must be accessible once installed. The connectionmust be labelled ‘Safety Electrical Connection - Do Not Remove’in accordance with regulation 514-13-01.

The impedance of the earth fault path on a TN-S installation isrelatively low; disconnection of the final circuits can usually beachieved with conventional circuit protective devices such asfuses or circuit breakers.

TN-C-S Earthing ArrangementsTN-C-S or ‘PME’ (protective multiple earthing) as it is sometimescalled is the most common arrangement used today. The LV network supply cable is usually routed underground and cableshave insulated phase conductors at the core. These are surrounded by an armour style arrangement of smaller wires which make up the P.E.N. (protective earth and neutral)conductor. The P.E.N. conductor is earthed at the supply transformer and at multiple points along its length. The supplycompany will connect the installation earthing conductor to theP.E.N. conductor at the cutout.

The impedance of the earth fault path on a TN-C-S installation isrelatively low. Disconnection of the final circuits can usually beachieved with conventional circuit protective devices such asfuses or circuit breakers. Any circuits that extend beyond theequipotential zone must not form part of the TN-C-S installationand should be treated as TT systems.

0056467

Meter

ServiceCut-out PME Earthing

Conductor

Main Earthing Terminal

Equipotential Bonding

Conductors

Safety Earth ConnectionDO NOT REMOVE

Neutral LinkConnection Block

GasWater

0056467

Meter

ServiceCut-out

Earthing Conductor


GasWater

Equipotential BondingConductors



N

L1

L2

L3

Suppliers Transformer

Three-phase Installation Single-phase Installation

Source earth

Exposed-conductive-parts

InstallationEarthElectrode

InstallationEarthElectrode

Combined protective earth & neutral conductor (P.E.N.)

L1

L2

L3



Source earthAdditional source earth


L1

N

L2L3Protectiveconductor



Source earth


26

distribution boards and enclosures -earthing arrangements

TT Earthing ArrangementThe LV network supply cables on TT systems comprise phaseand neutral conductors only. These are used predominantly inrural locations where the installation may be some distance fromthe supply authority’s transformer and often take the form ofoverhead lines. The electrical installation contractor is responsible for providing the earth by installing an ‘earth electrode’. Brass or copper-coated steel rod electrodes are themost common type in current use. The connection to the earthelectrode must be accessible once installed to facilitate inspection and testing, frequently being installed in a small concrete pit. The connection must be labelled ‘Safety ElectricalConnection - Do Not Remove’ in accordance with regulation514-13-01.

The impedance of the earth fault path on a TT installation is relatively high. Disconnection of the final circuits may be difficultto achieve with conventional circuit protective devices such asfuses or circuit breakers, and the most common solution is touse Residual Current Devices (RCDs). In many cases the supplycompany may require the provision of a residual current deviceas a condition in its supply regulations.

Construction site installations will generally have a TT earthingarrangement.

0056467

Meter

ServiceCut-out

EarthElectrode

Earthing Conductor


GasWater

Equipotential BondingConductors

Residual CurrentDevices


27

distribution boards and enclosures -type ‘A’ distribution boards & enclosures

Distribution boardsThere are two types of distribution boards used to supply finalcircuits, type ‘A’ or ‘B’, the main difference being in the busbararrangements. Type ‘A’ boards utilise a horizontal busbar system,whereas type ‘B’ distribution boards employ a vertical busbarsystem. Both types can be used for single and three-phase distribution systems, but it is more common for type ‘A’ to beused for single-phase installations and type ‘B’ for three-phase installations.

Single-phase Distribution BoardsSingle-phase domestic installations use a ‘consumer controlunit’, more commonly referred to as a consumer unit. Hager consumer units are manufactured and comply with BS EN60439-3 and are a type-tested assembly. The units haveundergone an extensive testing program to ensure safe

operation under both normal and abnormal conditions. The unitsare subject to a fault current test of 16kA, as detailed in annexZA of BS EN 60439-3, corresponding to the maximum prospective fault current quoted by the Public ElectricitySuppliers for domestic installations. The test is performed on aunit fitted with approved devices and is given a conditional faultcurrent rating of 16kA. However, this value is only valid whenHager devices are fitted into the unit.

Hager offers over 150 standard units, sub-divided into six maintypes, each having specific qualities to suit different applications. Correct selection of the type of unit is essential inorder to comply with BS 7671. Hager also offers a ‘custom built’service for non-standard configurations.

Typical configurations include...Isolator controlled

Twin tariff

RCCB controlled

Selecting of consumer units.An installation must be designed with the user in mind, requiringthe designer and installer of electrical equipment to consult theWiring Regulations for guidance. Consideration must be given tothe earthing arrangements and other external influences.

Section 314 of BS 7671 details the requirements for sub-dividingan installation into circuits in order to prevent danger, minimiseinconvenience and facilitate safe operation, inspection, testingand maintenance. Consideration must be given to the implications of one protective device operating and removing thesupply from all or large sections of an installation.

Almost every installation in the UK uses BS 1363 socket outlets.Regulation 471-16-01 has wide ranging implications. Therequirement here is for any socket outlet rated at 32A or less,which can reasonably be expected to supply portable equipmentfor use outdoors, to be provided with additional protection toreduce the risk associated with direct contact. It lists SELV, electrical separation or an RCD (Residual Current device) as themethods to be used. The most convenient is an RCD. In thiscase the device is being used as supplementary protectionagainst direct contact so it must have the characteristicsdetailed in regulation 412-06-02(ii), i.e. a sensitivity of 30mA orless.

Where residual current devices are used it is essential to consider how many circuits are supplied from a single device toavoid danger and inconvenience. Regulation 531-02-09 detailsthat where residual current devices are used in series, their characteristics must be such that any intended discrimination isachieved. With residual current devices discrimination isachieved using time-delayed upstream devices.

Split-load

Split-load time delayed RCCB

Twin RCCB

80A DP30mA RCCB

80A DP 100mA RCCB

100A DP Switch Disconnector

1 0N

hager

1 0N

np

1 3

2 4

SB299

hager

1 ON1 ON

Test

CE280U

hager

1 ON1 ON

Test

CD280U

63/100A DP30mA RCCB

100A DP100mA 'S' type RCCB

hager

1 ON1 ON

Test

CD284U CN284U

hager

1 ON1 ON

Test

hager

1 ON1 ON

Test

CD284U

1 0N

hager

1 0N

np

1 3

2 4

SB299

100A DP SwitchDisconnector

63/80/100A DP30mA RCCB

hager

1 ON1 ON

Test

CD284U

63/80/100A DP30/100mA RCCB

1 0N

hager

1 0N

np

1 3

2 4

SB2991 0N

hager

1 0N

np

1 3

2 4

SB299


1 0N

hager

1 0N

np

1 3

2 4

SB299


28

distribution boards and enclosures -type ‘A’ distribution boards & enclosures

suitable usually affordingfor compliance with

Type of unit

Switch Disconnector Controlled N/a

Twin-tariff Switch Disconnector N/aControlled

RCCB controlled (30mA) N/a

RCCB controlled (≥ 100mA) N/a

Split-load N/a

Split-Load Time-Delayed RCCB

Controlled

Twin RCCB controlled

Note: Where a unit is indicated as not affording compliance with 471-16-01, this can be remedied by the inclusion of an RCBO onthe necessary circuits.

Installation of a consumer unit.A consumer unit is intended for use by unskilled and often uninstructed personnel. The unit must therefore be installed insuch a way that no danger can occur whilst a person is carryingout any operation such as replacing fuses or resetting circuitbreakers. Proper and adequate labels and instructions must beprovided, particular attention must be given to sealing the unit tothe appropriate international protection code to prevent inadvertent contact with live parts.

TT

TN

S

TN

C

S

314

01

01

314

01

02

471

16

01

531

02

09

Cables adequatelyclipped (526-01-01)

Protective conductors (earthing and bonding)sized in accordance with chapter 54

Unit adequatelyfixed (412-03-03)

Enclosure sealedto IP2X ie blanksfitted (412-03-01)

Enclosure materialappropriate to theenvironment (522-06-01)

Appropriate labels provided(514-12-01 & 514-12-02)

Sufficient space to allowcables to bend intodevices (522-08-03)

Cable sheaths notstripped outside ofenclosure (526-03-03)and grommets usedwhere appropriate(522-08-01)

Cable entry sealedto IP4X (412-03-02)

Circuits must be sub-divided (314-01-02), separated (314-01-04),protected by appropriate devices (433-02-01) and identifiable toprotective device (514-08-01)

Circuit chart or test sheet must be provided (514-09-01)

29

distribution boards and enclosures -non standard configurations

Non-standard configurationsHager Vision consumer units are easily adapted to other configurations. This can be carried out on-site using Visionaccessories or within the factory as part of the Company’s ‘custom built’ service.

The inclusion of control products within distribution boards offersa neat and tidy solution that reduces installation time. Any HagerDin-rail mounted control product can be fitted into the Visionrange of units or into any of the multi-service enclosures.

Multi-service enclosuresWhere a different type of enclosure is required e.g. material or IPcode, or a larger capacity is needed, the various multi-serviceenclosures offer the best solution.

Invicta enclosures have been designed for use with Vision rangeterminal bars, pan assemblies and associated accessories..

The enclosures are supplied with the Din-rail fitted, which can bereplaced with Vision pan assemblies if required. In example the bottom din rail has been replaced with a VPA-16 pan assembly,to this an SB299 switch, CD284U RCCB an VACC9 split-load kithave been fitted providing a single-phase distribution board onthe bottom row. The top din-rail row can house any modularcontrol and automation products up to 18 modules in width.

Hager technical support can provide a drawing similar to the oneshown to enable easy selection and fitting of site-built distribution systems.

1 0N

hager

1 0N

np

1 3

2 4

SB299

hager

1 ON1 ON

hager

1 ON1 ON

hager

1 ON1 ON

hager

1 ON1 ON

hager

1 ON1 ON

hager

1 ON1 ON

VG

01B

VG

01B

VG

01B

hager

1 ON1 ON

Test

CD284U

hager

1 ON1 ON

hager

1 ON1 ON

hager

1 ON1 ON

VG

01B

hager

1 ON1 ON

ES463B

hager

A1 1 3 5 7

2A2 4 6 8

LZ06

0

ES440B

hager

A1 1 3 5 7

2A2 4 6 8

LZ06

0

2 4 6 8

31 75

hager

EG200

hager

230 V ~

12V~8V~

ST303EE171

hager

51 2 3 4 6

7 8 11109 12

VG01C

hager

VG01C

hager

VG01C

hager

cut and remove excessbusbar

fit VACC2 Din Rail conversion clips

30

distribution boards and enclosures -vision insulated enclosures - dimensions

insulated enclosure insulated rangemodular capacity width height depth fixing centres cutout size no. cutouts(size) A B C top bottom back

4 (1) 167 193 112 94 135 128 26 x 16 3 4 -

40 x 40 1 - -

50 x 25 - - -

60 x 45 - - 1

6 (2) 220 231 112 106 165 162 26 x 16 5 6 -

40 x 40 1 - -

50 x 25 - - 2

60 x 45 - - -

10 (3) 291 231 112 220 165 235 26 x 16 7 8 -

40 x 40 1 - -

50 x 25 - - 3

60 x 45 - - -

14 (4) 383 231 112 306 165 306 26 x 16 11 12 -

40 x 40 1 - -

50 x 25 - - 4

60 x 45 - - -

18 (5) 455 231 112 378 165 378 26 x 16 13 14 -

40 x 40 1 - -

50 x 25 - - 5

60 x 45 - - -

31

distribution boards and enclosures -vision insulated enclosures - dimensions

metal enclosure width depth height fixing centres knockout no of knockoutsmodular capacity A B C size top bottom left right back(width size) side side

6 (2) 220 112 231 108 165 163 ø21 4 4 - - -ø33 1 - - 1 -ø25 - - - - -25 x 50 - - - - 2

10 (3) 291 112 231 180 165 235 ø21 6 6 - - -ø33 1 - - 1 -ø25 - - - - -25 x 50 - - - - 3

14 (4) 383 112 231 252 165 307 ø21 8 8 - - -ø33 1 - - 1 -ø25 - - - - -25 x 50 - - - - 4

18 (5) 455 112 231 323 165 378 ø21 11 9 - - -ø33 1 - - 1 -ø25 - - - - -25 x 50 - - - - 5

JK metal A boards and DIN rail enclosures

technical information - IP55 weatherproofenclosures Vector II - dimensions

metal enclosure width depth height fixing centres knockout no of knockoutsmodular capacity A B C size top bottom left right back(width size) side side6 (2) 226 115 237 108 165 163 ø21 4 4 - - -

ø33 1 - - 1 -ø25 - - 1 - -25 x 50 - - - - 2

10 (3) 298 115 237 180 165 235 ø21 6 6 - - -ø33 1 - - 1 -ø25 - - 1 - -25 x 50 - - - - 3

14 (4) 390 115 237 252 165 307 ø21 8 8 - - -ø33 1 2 - 1 -ø25 - - 1 - -25 x 50 - - - - 4

18 (5) 461 115 237 323 165 378 ø21 11 9 - - -ø33 1 2 - 1 -ø25 - - 1 - -25 x 50 - - - - 5

2 x 10 (3) 298 115 468 235 395 235 ø21 4 4 - - -ø33 1 - - 2 -ø25 - - 2 - -25 x 50 - - - - 4

2 x 14 (4) 390 115 468 307 395 307 ø21 8 8 - - -ø33 1 2 - 2 -ø25 - - 2 - -25 x 50 - - - - 8

2 x 18 (5) 461 115 468 378 395 378 ø21 11 9 - - -ø33 1 2 - 2 -ø25 - - 2 - -25 x 50 - - - - 10

3 x 18 (5) 461 115 699 378 632 378 ø21 11 9 - - -ø33 1 2 - 3 -ø25 - - 3 - -25 x 50 - - - - 15

cat. ref. a b c

VE103U 175 110 93

VE106U 190 164 113

VE110U 210 236 114

VE112U 302 310 151

VE212U 427 310 151

VE312U 552 310 151

32

distribution boards and enclosures -JKA - dimensions

33

distribution boards and enclosures -Invicta 63MK2 distribution boards

Three-phase distribution boardsCircuit breaker boards on commercial installations are usually oftype ‘B’ configuration. The boards have a vertical busbar stackto which devices can be fitted horizontally, usually to both sides.Boards are manufactured and comply with BS EN 60439-3..

The concept for Hager commercial distribution boards...

5. (optional) select control and automation products

4. (optional) select extension or spreader boxes

3. select protective devices

1. select primary board

2. select incoming kit

Invicta 63Mk2 TP&N Distribution BoardsThe Invicta 63Mk2 range is designed primarily for final circuit distribution for three-phase installations. Single phasing can beachieved by fitting the JK250SP single-phase conversion kit.Units are available with from 4 up to 24 triple pole outgoingways, with a variety of incoming devices rated at up to 250Aincluding fused combination switches and contactors . Therange offers 322 different combinations of primary board /incomer configuration. Boards are available with glazed or plaindoors and a wide range of accessories. Outgoing circuits areprotected by circuit breakers and RCBO’s, available in B, C or Dcurves from 0.5A up to 63A. (See selection chart).

Invicta 63Mk2 TP&N boardsBusbar rated current 250AEnclosure degree of protection IP3X or IP65Enclosure material Steel or GRPDoor options Glazed or plain steelInternal separation Form 3aBusbar rated short time 10kA / 1sec withstand current 15kA / 0.7secConfiguration of triple pole ways 4, 6, 8, 12, 16, 20, 24

and 12 way split boards

Invicta 63Mk2 distribution boardsIn 2002 Hager’s new Invicta 63Mk2 distribution boards were alsoaccredited by ASTA. The first distribution boards within theindustry to achieve ASTA’s approval.

ASTA remain the most respected industry body in third partytesting. The certification provides you with significant guarantees in terms of both the integrity of the product designand an assured consistency in build quality.

Invicta 63Mk2 TP&N boardsIncomer options

100A 3P switch disconnector JK1003S





125 3P MCCB JK1253M

160A 3P MCCB JK1603M


125 4P MCCB JK1254M



250A 4P direct connection kit JK2504D

125A 4P + 4P manual change over switch JK1254CO

200A 3P fuse combination switch JK2003F

200A 3P + SwN fuse combination switch JK2004F

63A 4P (AC3) contactor c/w 63A switch disconnector JK0634C

100A 4P (AC3) contactor c/w 100A switch disconnector JK1004C

63A 30mA 4P RCCB JK0634RH

100A 30mA 4P RCCB JK1004RH

100A 100mA 4P RCCB JK1004RM

100A 300mA 4P RCCB JK1004RL

100A 100mA time delayed 4P RCCB JK1004RMD

100A 300mA time delayed 4P RCCB JK1004RLD

Cable spreader boxsmall 250mm height - plain door JK201E

large 400mm height - plain door JK202E

Meter pack - multi function meter JK240A

Devices

Single & three pole B curve circuit breakers 0.5 - 63A

Single & three pole C curve circuit breakers 0.5 - 63A

Single & three pole D curve circuit breakers 0.5 - 63A

Single pole switched neutral B curve RCBO 30mA 6 - 40A

Single pole switched neutral C curve RCBO 10 - 30mA, 6 -40A

Single pole & neutral B curve RCBO 10 - 30mA, 6 - 50A

Single pole & neutral C curve RCBO 10 - 100mA, 6 - 50A

BS88 fuses 2 - 30A

BS1361 fuses 5 - 30A

Busbar blanking piece VG01B

Din-rail blanking piece VG01C

Vertical mounted extension boxes

accepts 18 modules (1 row) - glazed door JK204E

accepts 18 modules (1 row) - plain door JK204E1

accepts 36 modules (2 row) - glazed door JK206E

accepts 36 modules (2 row) - plain door JK206E1

Dimensions & Data

34

Weight kgBoards W H C C1 C2 F F1 F2 D Glazed PlainJK204P(1) 475 500 360 180 57.5 399.5 - 70.8 160 12.5 12.8JK206D* 600 800 519 - - 719 - ** 300 - 38.3J2K06F* 600 800 519 - - 719 - ** 300 - 30.6JK206P(1) 475 560 360 180 57.5 399.5 - 70.8 160 13.5 14JK208D* 600 800 519 - - 719 - ** 300 - 37.9JK208F* 600 800 519 - - 719 - ** 300 - 31.5JK208P(1) 475 620 360 180 57.5 459.5 - 70.8 160 14.5 15.3JK212D* 600 950 519 - - 869 - ** 300 - 43.7JK212F* 850 1150 767 - - 1067 - ** 300 - 37.5JK212P(1) 475 750 360 180 57.5 589.5 - 70.8 160 17.5 18.3JK216D* 600 950 519 - - 869 - ** 300 - 44.2JK216F* 850 1150 767 - - 1067 - ** 300 - 56JK216P(1) 475 1050 360 180 57.5 839.5 419.75 95.7 160 24 25.2JK220P(1) 475 1150 360 180 57.5 939.5 469.75 95.7 160 26 26.6JK224P(1) 475 1250 360 180 57.5 1039.5 519.75 95.7 160 28 29JK248P(1) 475 1050 360 180 57.5 939.5 469.75 95.7 160 24.2 26.2JK266P(1) 475 1050 360 180 57.5 939.5 469.75 95.7 160 24.2 26.2JK284P(1) 475 1050 360 180 57.5 393.5 469.75 95.7 160 24.2 26.2

distribution boards and enclosures -Invicta 63MK2 - dimensions

* fixing cables relates to F andD boards

** fixing by external bracketswhich extend from the outside of the enclosure40.5mm to centre of fixinghole.

Part reference:FL85Z for steel enclosures FL86Z for GRP enclosures

W

C1

H

F2D

F

F1

C2

C

either

or

Note:If flush fitting, a cut-out of H x W x 100mm is required.

35

distribution boards and enclosures -Invicta 63Mk2 - dimensions

Boards IP Material Outgoing Earth Neutral Main connectionCode ways Bar Bar N E

JK204P 3X Steel 4 18 x 25mm2 14 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK206D 65 Steel 6 24 x 25mm2 22 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK206F 65 GRP 6 24 x 25mm2 22 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK206P 3X Steel 6 24 x 25mm2 22 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK208D 65 Steel 8 30 x 25mm2 28 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK208F 65 GRP 8 30 x 25mm2 28 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK208P 3X Steel 8 30 x 25mm2 28 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK212D 65 Steel 12 42 x 25mm2 40 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK212F 65 GRP 12 42 x 25mm2 40 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK212P 3X Steel 12 42 x 25mm2 40 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK216D 65 Steel 16 54 x 25mm2 52 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK216F 65 GRP 16 54 x 25mm2 52 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK216P 3X Steel 16 54 x 25mm2 52 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK220P 3X Steel 20 66 x 25mm2 64 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK224P 3X Steel 24 78 x 25mm2 76 x 25mm2 M8 lug 50mm cage M8 lug 50mm cageJK248P 3X Steel 4 protected 18 x 25mm2 14 x 25mm2 M8 lug 50mm cage M8 lug 50mm cage

8 unprotected 30 x 25mm2 28 x 25mm2

JK266P 3X Steel 6 protected 24 x 25mm2 22 x 25mm2 M8 lug 50mm cage M8 lug 50mm cage6 unprotected 24 x 25mm2 22 x 25mm2

JK284P 3X Steel 8 protected 30 x 25mm2 28 x 25mm2 M8 lug 50mm cage M8 lug 50mm cage4 unprotected 18 x 25mm2 14 x 25mm2

Pan Outgoing W H C Fassembly ways

JK204PA 4 305 383 230 10.5

JK206PA 6 305 435.4 230 10.5

JK208PA 8 305 488.8 230 10.5

JK212PA 12 305 595.6 230 10.5

JK216PA 16 305 852.4 230 10.5

JK220PA 20 305 959.2 230 10.5

JK224PA 24 305 1066 230 10.5

Please consult us for split load pan assembly dimensions

Dimensions & Data

C

H

FW

36

distribution boards and enclosures -Invicta 63Mk2 - devices

MCBs RCBOs fuse carrierstype type type 1 mod 1 mod 1 mod 1 mod 1 mod 1 mod 2 mod 2 mod BS1361 BS88 BS88B C D type B type C type B type C type C type C type B type C fuse & fuse fuse

30mA 30mA 10mA 10mA 100mA 10.kA 30mA 30mA carrier carrier link30mA (A)* (A)**

single pole

0.5A NB100 NC100 ND100

1A NB101 NC101 ND101

2A NB102 NC102 ND102 L50145 (2) L171

4A NB104 NC104 ND104 L50145 (4) L172

6A NB106 NC106 ND106 AD104 AD119 AC104 AC119 AD184 AD906U AD956U L113 (5) L50145 (6) L173

8A L50145 (8) L174

10A NB110 NC110 ND110 AD105 AD120 AD185 AD910U AD960U L50145 (10) L175

16A NB116 NC116 ND116 AD107 AD122 AC107 AC122 AE116Z AD187 AD916U AD966U L115 (15) L50145 (16) L176

20A NB120 NC120 ND120 AD108 AD123 AD188 AD920U AD970U L116 (20) L50145 (20) L177

25A NB125 NC125 ND125 AD109 AD124 AC109 AC124 AD189 AD925U AD975U L50145 (25) L178

32A NB132 NC132 ND132 AD110 AD125 AC110 AC125 AE132Z AD190 AD932U AD982U L118 (30) L50145 (30) L179

40A NB140 NC140 ND140 AD111 AD126 AD191 AD940U AD990U

45A AD112 AD127

50A NB150 NC150 ND150 AD113 AD128

63A NB163 NC163 ND163

three pole

0.5A NB300 NC300 ND300

1A NB301 NC301 ND301

2A NB302 NC302 ND302

4A NB304 NC304 ND304

6A NB306 NC306 ND306

10A NB310 NC310 ND310

16A NB316 NC316 ND316

20A NB320 NC320 ND320

25A NB325 NC325 ND325

32A NB332 NC332 ND332

40A NB340 NC340 ND340

50A NB350 NC350 ND350

63A NB363 NC363 ND363

1 pole outgoing blank - VG01B *BS1361 - for spare fuses please consult us.

1 module DIN rail blank - VG01C **BS88 to order a complete set, order fuse carrier and linkexample 2A version = L50145 + L171.

Note: please refer to individual device pages in the catalogue for benefits of 2 module RCBO’s for other RCBO sensitivities please consult us.

AD119NC116 NC320

37

distribution boards and enclosures -Invicta 63Mk2 - extension boxes

Invicta 63Mk2 incoming devices The boards have been designed to accommodate incomingswitches and associated cables within the primary board; switch disconnector incomers upto 125A are designed to fitwithin the board. Due to the larger cables generally associatedwith the higher circuit rated devices, larger incoming devices aresupplied in their own enclosure which must be fitted beneath theprimary board.

The data in this table is applicable where a distribution board isfed with an SWA (Steel Wire Armoured) cable entering the enclosure below the main switch. Where the cable enters fromthe top an extension box is unlikely to be required.

Extension boxesextension box neutral term. earth term modular pan assy. H (mm) W (mm) D (mm)

capacity

JK204E 20 x 25mm 20 x 25mm 18 VPA-16 250 475 160

JK206E 35 x 25mm 35 x 25mm 36 VPA-16 400 475 160

JK204PDH 16 x 25mm 14 x 25mm 12 VPA-4 x 2 500 237.5 160

JK204PDF 40 x 25mm 38 x 25mm 36 VPA-16 x 2 500 475 160













JK201PDH 8 x 25mm 8 x 25mm 6 VPA-4 250 237.5 160

JK201PDF 20 x 25mm 20 x 25mm 18 VPA-16 250 475 160

JK202PDF 16 x 25mm 14 x 25mm 12 VPA-4 x 2 400 237.5 160


Incomer kit Terminal connection Maximum cable capacity extension box recommended fittedJK1003S cage 50mm2 > 50mm2 size 1JK1253S cage 50mm2 > 50mm2 size 1JK2503S M8 120mm2 factory fitted size 3JK1004S cage 50mm2 > 50mm2 size 1JK2504S M8 120mm2 factory fitted size 3JK1253M M8 120mm2 factory fitted size 3JK1603M M8 120mm2 factory fitted size 3JK2503M M8 120mm2 factory fitted size 3JK1254M M8 120mm2 factory fitted size 3JK1604M M8 120mm2 factory fitted size 3JK2504M M8 120mm2 factory fitted size 3JK2504D M8 120mm2 ≥ 50mm2 5/26 2JK1254CO cage 50mm2 factory fitted size 1JK2003F M8 120mm2 factory fitted size 3JK2004F M8 120mm2 factory fitted size 3JK0634C cage 50mm2 > 50mm2 size 1JK1004C cage 50mm2 > 50mm2 size 1JK0634RH cage 50mm2 > 50mm2 size 1JK1004RH cage 50mm2 > 50mm2 size 1JK1004RM cage 50mm2 > 50mm2 size 1JK1004RL cage 50mm2 > 50mm2 size 1JK1004RMD cage 50mm2 > 50mm2 size 1JK1004RLD cage 50mm2 > 50mm2 size 1

38

Application of extension boxesCable spreader boxes can be used for extra cabling space or forthe inclusion of non-modular products such as current transformers (CTs). Spreader boxes are available in two sizes foreach of the Invicta ranges.

The inclusion of control and monitoring devices in distributionsystems is becoming increasingly common on electrical installations. Hager has developed its commercial range of distribution boards to enable the installer to add modulardevices easily to any distribution board. Din-rail extension boxeshave been designed specifically for this purpose. These have amodular capacity that is based on the width of a single pole circuit breaker; modular products are given a modular size,which enables the installer to identify the extension boxrequired.

E.g. A JK206E Din-rail extension box would be needed to housesix TS206 Tebis TS lighting output devices. TS206 are four modules wide, so twenty-four modules is the total modularspace needed, a JK06E has a capacity of thirty-six modules.

Additional side extension boxes are available where cablingthrough an extension box is inpractiable. These are availale witheither DIN rail ways or plain covers for cable ways in full or halfwidth.

For other configurations call the technical help-line on 0870 607 6677. The technical support engineer will be ableto provide you with a drawing and list of products to suit yourapplication.

distribution boards and enclosures -Invicta 63Mk2 - extension boxes

JK216P16 way TP&N board

JK216PSHhalf width side spreader box

JK266PTP&N split load board

JK202Ecable spreader box

JK202PSH400mm filler box

JK206E36mod extension box

39

distribution boards and enclosures -Invicta panelboards

Invicta 125 & 250 PanelboardsA Panelboard is the generic term for a type ‘B’ distribution boardthat accepts moulded case circuit breakers as outgoing devices.Panelboards are larger versions of TP&N distribution boards, themain difference being that the maximum current of both incoming and outgoing devices can be much higher. Designedfor sub-distribution of electrical circuits these Panelboards offera versatile and cost effective alternative to cubicle switchboards.The concept for selecting and fitting accessories is similar toInvicta 63Mk2 TP&N boards.

Invicta 125 Panelboard

Busbar rated current 400A

Enclosure degree of protection IP3X door closed

Enclosure material Steel

Door options Glazed or plain steel

Internal separation Form 3a

Busbar rated short time withstand current 35kA for 1s unconditional

Configuration of triple pole ways 4, 6, 8, or 12

Maximum prospective short-circuit level at point of applicationIncomer main terminals - outgoing HD 16kA

Incomer main terminals - outgoing HH 25kA

Incomer non-auto - outgoing HD 16kA

Incomer non-auto - outgoing HH 25kA

Incomer H400 MCCB - outgoing HD or HH 25kA

Incomer options

250A 3 pole MCCB JN223M




250A 3 pole non-auto MCCB AC23 JN223S




400A direct connection kit JN244D

Extension boxes 21 & 42 module

Cable spreader boxes 250mm & 400mm high

Meter pack Multi-function

DevicesSingle & three pole HD & HH 125 frame MCCB 16 - 125A

Busbar blanking piece JN201B (SP)


Invicta 250 Panelboard

Busbar rated current 800A

Enclosure degree of protection IP3X door closed

Enclosure material Steel

Door options Glazed or plain steel

Internal separation Form 3a

Busbar rated short time withstand current 35kA for 1s unconditional

Configuration of ways Total number ofways

125A outgoing ways only 6, 8, 12 or 18

2 x 250A outgoing ways plus remainder125A 6, 8 or 12

4 x 250A outgoing ways plus remainder 125A 8, 12 or 18

6 x 250A outgoing ways plus remainder 125A 18

Maximum prospective short-circuit level at point of applicationIncomer main terminals - outgoing HD/HN 16kA

Incomer main terminals - outgoing HH/HN 25kA

Incomer main terminals - outgoing HN only 35kA

Incomer non-auto MCCB - outgoing HD/HH/HN 16kA

Incoming non-auto MCCB - outgoing HH/HN 25kA

Incomer H400 MCCB - outgoing HD/HH/HN 25kA

Incomer H400 MCCB - outgoing HN only 35kA





Incomer options400A 3 pole MCCB JF243M

400A 4 pole MCCB JF244M





400A 3 pole non-auto MCCB AC23 JF243S






800A direct connection kit JF284D

Extension boxes 32 & 64 module

Cable spreader boxes 250mm & 400mm high

Meter pack Multi-function

DevicesSingle & three pole HD & HH 125 frame MCCB 16 - 125A

Three pole H250 MCCB 160 - 250A

Busbar blanking piece 125A way JN201B (SP)

Busbar blanking piece 250A way JF202B (TP)


40

Dimensions & Data

Boards W H C C2 F F1 F2 D Weight (kg)Glazed Plain

JN204P(1) 710 979 530 90 775 - 96.5 160 40 46.25

JN206P(1) 710 1056 530 90 852 - 96.5 160 45 49.64

JN208P(1) 710 1133 530 90 929 - 96.5 160 50 55.05

JN212P(1) 710 1287 530 90 1083 - 96.5 160 56 61.84

JF206P(1) 900 1203 730 85 999 - 96.5 215 73 82.19

JF208P(1) 900 1308 730 85 1104 - 96.5 215 81 89.93

JF212P(1) 900 1463 730 85 1259 - 96.5 215 91 101.1

JF218P(1) 900 1720 730 85 1516 758 96.5 215 96 108.08

JF222P(1) 900 1463 730 85 1259 - 96.5 215 88 98.1

JF226P(1) 900 1203 730 85 999 - 96.5 215 74 83.19

JF228P(1) 900 1308 730 85 1104 - 96.5 215 79 87.93

JF242P(1) 900 1463 730 85 1259 - 96.5 215 89 99.1

JF244P(1) 900 1720 730 85 1516 758 96.5 215 99 111.08

JF248P(1) 900 1308 730 85 1104 - 96.5 215 78 86.93

JF262P(1) 900 1720 730 85 1516 758 96.5 215 99 111.08

distribution boards and enclosures -panelboards - dimensions

41

distribution boards and enclosures -panelboards - dimensions

Boards Outgoing ways Earth Bars Neutral Bar Main connection125A 250A W X Y Z Earth Neutral

JN204P(1) 4 - 9 x 25mm 9 x 25mm 6 x 50mm 6 x 50mm M10 M12




JF206P(1) 6 - 12 x 25mm 12 x 25mm 9 x 50mm 9 x 50mm M10 M12




JF222P(1) 10 2 2 x 50mm 2 x 50mm 1 x M10 bolt 1 x M10 bolt M10 M1218 x 25mm 18 x 25mm 15 x 50mm 15 x50mm

JF226P(1) 4 2 2 x 50mm 2 x 50mm 1 x M10 bolt 1 x M10 bolt M10 M129 x 25mm 9 x 25mm 6 x 50mm 6 x 50mm






Note: Additional 4 x M10 holes (JF) and 2 x M10 holes (JN) are provided on the earth bar cross link for lugging bonding conductors larger than 25mm.

Pan assembly Outgoing ways W H C F K L M125A 250A

JN204PA 4 - 466 250 442 109 43.5 43.5 M8

JN206PA 6 - 466 327 442 186 43.5 43.5 M8

JN208PA 8 - 466 404 442 263 43.5 43.5 M8

JN212PA 12 - 466 558 442 417 43.5 43.5 M8

JF206PA 6 - 569 380 545 105 70 70 M12

JF208PA 8 - 569 457 545 210 70 70 M12

JF212PA 12 - 569 611 545 308 70 70 M12

JF218PA 18 - 569 842 545 539 70 70 M12

JF222PA 10 2 569 639 545 336 70 70 M12

JF226PA 4 2 569 408 545 105 70 70 M12

JF228PA 6 2 569 485 545 105 70 70 M12

JF242PA 8 4 569 667 545 420 70 70 M12

JF248PA 4 4 569 513 545 210 70 70 M12

W

C

H

F

M

K L

42

Adjustable incoming devices

Ith adjustments Imag AdjustmentsReference Type Min Max Min Max

JN 250A incomers Suffix ‘M’ 200A 250A 5 x In 10 x In



JF 400A incomers Suffix ‘M’ 320A 400A 5 x In 10 x In



Accessories for incoming devices

Reference Extended Spreader Shunt trip Undervoltage release Auxiliary Alarm connections links 12-60V 110-230V 400V 230 400 contact contact

JN 250A incomers HY710 HY711 HX701 HX704 HX705 HX714 HX715 HX722 HX723

JN 400A incomers - - HX701 HX704 HX705 HX714 HX715 HX722 HX723

JF400A incomers - - HX801 HX804 HX805 HX814 HX815 HX822 HX823

JF630A incomers - - HX801 HX804 HX805 HX814 HX815 HX822 HX723

JF 800A incomers - - HX801 HX804 HX805 HX822 HX823 HX822 HX823

Panelboard circuit breaker selection chart

In Single pole Three Pole Invicta 125 Invicta 250 Terminal capacity

16A HD101/HH101 HD141/HH141 50mm

20A HD102/HH102 HD142/HH142 50mm

25A HD103/HH103 HD143/HH143 50mm

32A HD104/HH104 HD144/HH144 50mm

40A HD105/HH105 HD145/HH145 50mm

50A HD106/HH106 HD146/HH146 50mm

63A HD107/HH107 HD147/HH147 50mm

80A HD108/HH108 HD148/HH148 50mm

100A HD109/HH109 HD149/HH149 50mm

125A HD110/HH110 HD150/HH150 50mm

160A N/A HN254 - * 120mm

200A N/A HN203 - * 120mm

250A N/A HN204 - * 120mm

* not JF206P, JF208P, JF212P, JF202P or JF218P

120mm lugs provided up to 150mm cable can be fitted with suitable compression lugs

distribution boards and enclosures -incoming devices & outgoing devices

43

distribution boards and enclosures -panelboard - extension boxes

Extension boxes

Extension Modular Weight (KG)boxes W H D Earth Bar capacity Glazed Plain

JN201A 710 250 160 M8, 18 x 25mm - 15 -

JN201E(1) 710 250 160 M8, 18 x 25mm 21 8.91 8.91

JN203E(1) 710 400 160 M8, 18 x 25mm 2 x 21 13.27 13.27

JN205E 710 250 160 - - - 9.25

JN206E 710 400 160 - - - 13.84

JF201E(1) 900 250 215 M8, 18 x 25mm 32 12.45 12.45

JF203A 900 250 215 M8, 18 x 25mm - 15.94 -

JF203E(1) 900 400 215 M8, 18 x 25mm 2 x 32 17.94 17.94

JF205E 900 250 215 - - - 12.68

JF206E 900 400 215 - - - 19.36

Incomer kit Max Cable Capacity Max lug Standard board with spreader box width N P

JN incomers 250A 240mm2 240mm2 M12 56 43.5



JN244D 240mm2 240mm2 M12 46.4 43.5

JF incomers 400A 1 x 240mm2 2 x 240mm2 M12 60.5 70



JF284D 1 x 240mm2 2 x 240mm2 M12 87 70

Note: Recommendations based on cables entering from the base of the unit as diagram above. Maximum cable capacity basedon standard compression terminals (lugs), larger cables may be fitted with narrow ended lugs.

N

P

P

P

M

W

H

D

44

Meter PacksPre-wired meter packs rated at 400A for the Invicta 125 rangeand 800A for the Invicta 250 range of panelboards offer measurement readings for

• Amperes

• Voltage

• KWh

• KVar

• Power factor

Power usage can be monitored remotely through the pulsed output terminals. The meter is supplied in a 250mm high extension box that can be mounted above or below thePanelboard. The CT section is fixed inside the primary boardbelow the incoming device and is provided with two purpose-fitted fixing points, with provision for a further four fixings. The cable connection is by M12 compression terminalsonto copper bars extended through the CTs. A 400mm highcable spreader box is provided to enable easy connection anddressing of cables. The meter housing and spreader box are fitted in the same way as the extension boxes shown on page 37As with extension boxes the meter pack is supplied withoutgland plates, these are removed from the Panelboard and refittedto the meter pack enclosures.

The meter wiring loom is connected at the meter end and ismarked up for easy identification for connection to the terminalson the CT plate. The mains wiring loom is connected at the CTplate and can be connected on either side of the main incomingdevice, the cables being provided with large ring terminals.

CT’s

cable spreader box

distribution boards and enclosures -panelboards - meter packs

control fusesloom terminal connectors

metermeterenclosure

45

distribution boards and enclosures -prospective fault current

Prospective Fault CurrentThe electrical equipment used on an installation must be capableof operating safely when carrying both normal and abnormal currents. The largest current that equipment must be able towithstand is known as the prospective fault current.

The level of fault current depends on the size of the supplytransformer and any cable impedance between the transformerand the connected equipment. The magnitude of fault current islarger at the origin of an installation and lowest at the ends ofthe final circuits.

The prospective fault current can be either

• Short Circuit Current, i.e. a fault between live conductors, or

• Earth fault current, i.e. a fault between live conductors and earth.

The theoretical maximum fault condition at any point in a distribution system is termed the ‘prospective fault current’.This is the rms value of the current that would flow if a solidlybolted direct fault occurs at that point and pre-supposes that thevoltage will remain constant and the ultimate supply source haslimitless capacity. Therefore, the prospective fault current is limited by

• The impedance of the high voltage network feeding the supply transformer.

• The impedance of the supply transformer.

• The impedance of the distribution Network from the supplytransformer to the point of fault.

In practice the voltage does drop, the fault does have impedanceand the protective devices have finite impedance. Therefore theprospective current is theoretical and cannot be exceeded. Theseverity of the short-circuit fault is also controlled by the ‘PowerFactor’ which like the fault current, is determined by the circuitconditions up to the point of fault. However, the short-circuitpower factor is not to be confused with the load power factorwhich is determined by the characteristics of the load itself.Power factor is effectively a measure of stored energy in the system. Hence if the power factor is low, there is a considerableamount of stored energy to be dissipated during the fault clearance. Also there will be a degree of asymmetry of the current wave due to the presence of a dc component.

Asymmetrical Short Circuit CurrentWhen a short-circuit occurs in a circuit the resistance of which isnegligible compared with the inductive reactance, the resultingshort-circuit current has a dc component. This dc componenthas a maximum value when the short-circuit occurs at theinstant at which the circuit voltage is zero. Since in a three phasesystem there are six voltage zeros per cycle, it is certain thatthere will be considerable asymmetry in the current flowing in atleast one of the phases. If the fault occurs at any other point ofthe voltage wave, the resultant short-circuit is partially offset,that is to say, it contains a dc component of reduced magnitude.

The asymmetrical current consists of the symmetrical short circuit current superimposed on or offset by a dc componentthat decreases exponentially to practically zero within a fewcycles. The asymmetrical short-circuit current peak determinesthe maximum mechanical stress to which the equipment may besubjected.

The maximum peak current is about 1.75 times the peak symmetrical current, or putting it another way 1.75 x √2, i.e. 2.5times the rms value of the symmetrical short-circuit current.

Calculation of Prospective Short Circuit CurrentSeveral excellent proprietary computer programs are now available for calculating the prospective fault level at any point inthe installation. They are also able to select the correct size andtype of cable and match this with the correct circuit protectivedevice. The formula for calculating the maximum prospectivesymmetrical three-phase fault current is...

Pfc = transformer kVA x 1000 voltage x √3 x % impedance

To calculate the Pfc at various positions in the distribution system the open circuit voltage is divided by the sum of theimpedance external to the installation and the impedance of thecables up to that point. For symmetrical three-phase calculationsonly the impedance of the phase conductors between the transformer and the point at which it is measured need be considered. The bolted three-phase fault does not use the neutral or earth path as a return and can be compared to a balanced three-phase load.

Single phase faultFault levelI = 240V / (2x0.008Ω)I = 15kA

Three phase fault(2.00 x single phase fault)Fault levelI = 240V / (1x0.008Ω)I = 30kA

240V

0.008ΩPhase impedance

PEN impedance

240V

0.008Ω Phase impedance

0.008Ω

PEN impedance

supply line to neutral voltage

short-circuit current

V

A

dc component

peak current

rms current

46

Estimation of Prospective Fault CurrentActually calculating prospective short-circuit current is not initself difficult but it does require basic data which is not always available to the electrical installation designer.

It is therefore usual to use a simple chart or tables to estimatethe prospective short circuit current. This method always givesa prospective fault level greater than that which would have beenarrived at by calculation using accurate basic data. Therefore itis safe to use but sometimes may result in an over-engineeredsystem.

ExampleA system is being supplied by an 800KVA transformer, from tableit can be seen that this transformer is capable of producing23.4kA of fault current at its LV terminals. A 4 metre length oftwin 240mm2 singles feed the main distribution panelboard. Theimpedance of this cable is ignored as it will have little impact onthe fault current.

Transformer maximum fault currents (assuming 4.75% impedance)

FLC IsckVA 400 415 400 415

200 289 278 6077 5858

315 455 438 9572 9226

500 722 696 15193 14644

630 909 876 19144 18452

800 1155 1113 24309 23431

1000 1443 1391 30387 29289

1250 1804 1739 37984 36611

1500 2165 2087 45580 43933

A 120mm2 sub distribution circuit is to be taken from the mainPanelboard and runs for a distance of 15 metres. To estimate thefault current at the next distribution panelboard.....

On table 2 project a line along the 120mm2 conductor row until alength not exceeding 15 meters is found. Now a line is projected down onto the fault current table 2.

On the Isc column of table 2 find the nearest value above23.4kA, in this case it is 24kA now project a line along that rowuntil it crosses the line projected down from the table above.Where these lines cross will give the approximate fault currenti.e. 19.8kA.

This process can be repeated for a 20 metre 50.0mm2 cable fromthis point, using the 20kA row as the Isc to estimate a fault current at the final distribution board to be 12.6kA.

Where the prospective fault current is lower at the origin of theinstallation than the breaking capacities of all of the protectivedevices and withstand currents of the distribution boards no further assessment of the maximum fault currents is necessary.

Service Cable Length (Metres)

Pro

spec

tive

Sho

rt C

ircui

t C

urre

nt (k

A)

0.1 1 10 100

16151413121110 9 8 7 6 5 4 3 2 1

0.55pf0.61pf

0.86pf

0.94pf

0.96pf

0.98pf

distribution boards and enclosures -prospective fault current

Fig 1

Prospective Fault Current in Domestic InstallationsOn single-phase supplies up to 100A the electricity supply companies generally recommend that any installation bedesigned to withstand the maximum system fault level of the distributing main. The declared fault level of the LV distributingmain is 16kA (0.55 power factor). Some supply companiesaccept that the impedance of the service cable may be takeninto account, as this is unlikely to change during the lifetime ofthe installation. The graph in Fig 1 shows the maximum prospective fault current at the incoming terminals of the consumer unit, for a standard service arrangement using a25mm2 service cable, depending on the length of this cablefrom the point of connection to the LV distributing main. The service cable length for domestic and similar installations maybe taken as the distance from the service position in the consumer’s premises to the boundary of the plot, assuming thatthe distributing mains cable is in the adjacent footpath.

47

distribution boards and enclosures -assessment of fault current

CS

Ac

irc

uit

le

ng

ths

in m

etr

es

2 x

240

4.0

8.0

20

40

60

80

10

01

40

20

03

00

40

05

00

10

00

15

00

20

00

2 x

185

3.0

6.1

15

30

45

61

76

10

61

52

22

73

03

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97

58

11

37

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150

2.4

4.9

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61

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83

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61

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09

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185

1.5

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53

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9.9

9.9

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9.5

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9.0

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7.9

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7.5

7.3

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6.9

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77

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5.8

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5.6

5.5

5.3

5.1

4.8

4.4

4.2

3.2

2.6

2.2

Tab

le 2

48

HarmonicsIn the UK, supply voltage is generated as a sinusoidal voltagewaveform with a frequency of 50Hz. When the load connected toit is linear the resulting current waveform is identical in shapethough it may be phase shifted depending on the reactance ofthe circuit. This 50Hz sine wave is known as the fundamentalfrequency.

With the increasing widespread use of electronic equipment andfluorescent lighting much of the equipment used within installations is of a non-linear nature. A non-linear device is onewhere the shape of the current wave demanded by the device isdifferent from the waveform of the supply voltage. Switch modepower supplies, that are commonly used in office equipment,draw current in pulses rather than in a smooth sine wave. As thecurrent waveform no longer resembles the voltage waveform, wecall the device a non-linear load. Printers, computers, photocopiers, fluorescent lighting and variable speed drives suchas those used to control elevators are all types of non-linearload.

Electronics have given rise to vastly more efficient and controllable equipment. However the increasing use of thesenon-linear loads within commercial and industrial installationshas led to a potential problem - Harmonics.

Harmonics are multiples of the fundamental 50Hz waveform. Asan example the third harmonic is a waveform with a frequency ofthree times the fundamental i.e. 3 x 50 = 150Hz. Harmonic currents if ignored can result in failure of electrical equipment.The increased heating effect of harmonic currents can cause theoverheating of conductors.

The fundamental currents of a three phase supply are out of stepwith each other by 120º and therefore the expected current inthe neutral conductor of a balanced three phase load is zero asthe phase currents sum to zero at the neutral point. Howeverany 3rd harmonic in the phase conductors - having a frequencyof 150Hz - actually add together when they get to the neutral asthey are now all in phase.

The harmonic content can be best illustrated by looking at theharmonic spectrum of a typical piece of equipment that produces harmonic distortion. As can be seen from above the3rd harmonic content could be as high as 85% of the fundamental. For a single-phase circuit these harmonic currentswill be seen in both the phase and neutral equally. If the conductors had been closely sized for the fundamental currentonly then could any harmonic content overload the cable. Ofmore realistic concern are the harmonic currents flowing in acommon neutral such as the supply conductor to a three-phasedistribution board. Here if non-linear loads are connected to different phases the 3rd harmonic currents will sum this can leadto overheating of neutral bars and conductors. In severe cases itcan lead to failure of equipment resulting in costly downtime andrepairs.

Whilst the best solution to harmonics is not to use non-linearloads, this is impractical. Filter networks can be used to reducethe problem however they need to be designed specifically tosolve the harmonic fingerprint in individual installations. This isoften costly and difficult to assess. To avoid the danger overheating conductors can present, a solution could be to provide four-pole overload protection to the circuit, the downside here is that all four conductors would need to be sized inaccordance with the expected neutral current if higher than thephase. As can be seen from the example below the maximumphase current is 80A convention would suggest a 100A protective device would be sufficient to protect this circuit, iffour-pole though this would need to be increased to 160A.

ExampleA distribution board feeding an office building has the followingloads connected to it...

Load Approx L1 L2 L3 Neutral% 3rd

Electronic fluorescent 70% 36A 37A 41A 80Alighting

Computers, printers etc 85% 28A 20A 21A 59A

General power using 0% 24A 20A 17A 7Aequipment

Totals 88A 77A 79A 146A

One other solution is to oversize the neutral bars and cables tocater for the expected overload in these conductors. This wouldrequire either an accurate assessment of the magnitude of overload current expected. Studies have shown that over sizingby a factor of 1.73 x the phase current is generally sufficient.Regulation 524-02-03 of BS7671 states that where harmoniccurrents are expected to be in excess of 10% of the fundamentalthe cross sectional area of the neutral conductors shall be a minimum of 100% of the corresponding phase conductors.

For further advice please contact Hager Technical Support.

% magnitude

% magnitude

100%

1 3 5 7 9 11 13 15 17

80%

60%

40%

20%

0%

Red phase

I

Yellow phase

I

Blue phase

I

Red phase

3rd Yellow phase

3rd Blue phase

3rd

Neutral 3rd harmonic current superimposed on phase currents

Current waveform

Voltage waveform

Load line

I

VAngle

Ang

le

Current waveform

Voltage waveform

Load line

I

VAngleA

ngle

Current waveformin a linear load

Current waveformin a non-linear load

distribution boards and enclosures -harmonics

Dist Boards

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