Ring Main Manual

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=Sabre VRN2a - IOM May 2010 LIOM01-001 - Issue 9 1

Sabre VRN2aInstallation, Operation and Maintenance Manual


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1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

OKN p~=sokO~=a= K=K=K=K=K=K=K=K=K=K=K=K=K=KROKO p~=sokO~=p~=i=a~~=K=K=K=KR

3 Front Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

4 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

QKN d~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKO p~=p=d~=b= K=K=K=K=K=K=K=K=K=K=K TQKP e==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKQ qJl= =_~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKR o=p= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKS l~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKT q=c~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKU f= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKV m~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KTQKNM q~=m=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K TQKNN q=i=c=m=EqicF= =K=K=K=K=K=K=K=K UQKNO qicLa=^=q=m=p=

a~~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KU

5 Sabre Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . .9

RKN o=~=p~==r= K=K=K=K=K=K=K=K=K=K=K=KVRKO p=a~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KV

RKOKN p~=sokO~=r= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K= VRKOKO p~=sokO~=^jr=`~=r=K=K=K=K=K= V

RKP p~=sokO~=r=c=j=a= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K NM

RKPKN r=i~= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K= NM

RKQ p~=`=_~=o~= =K=K=K=K=K=K=K=K=K=K=KNMRKR `~=q~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KNN

RKS b~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K NORKT q~=j= K=K=K=K=K=K=K=K=K=K=K=K=K=K=KNPRKU j~~=_= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KNP

6 Commissioning Tests . . . . . . . . . . . . . . . . . . . . . . . . . .14

SKN j~=`=o~=q= K=K=K=K=K=K=K=K=K=KNQSKO p~=t=f~=o~=

q =J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J=J NRSKOKN N=s=K= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K= NR

SKP es=q=_= ~== =q=q~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KNS

SKPKN es=f~=o~=q= =K=K=K=K=K=K=K= NSSKPKO m=c=q=K=K=K=K=K=K=K=K=K=K=K=K=K=K= NS

SKQ b~=q=^=`~==`=q=q~==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KNS

SKR qic=q=m=q= K=K=K=K=K=K=K=K=K=K=K=K=KNTSKRKN qic=m~=f=q=J=l=

q= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K= NTSKRKO qic=m~=f=q=J=b~=c~=

q==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K NUSKRKP qic=p~=f=q=J=l=

q==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K NVSKRKQ qci=p~=f=q=J=b~=c~=

q==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=KOM

SKS o~=q=m=q= K=K=K=K=K=K=K=K=K=K=KON

SKSKN o~=m~=f=q=J=l=q= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=ON

SKSKO o~=m~=f=q=J=b~=c~=q= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K OO

SKSKP o~=p~=f=q=J=l=~=b~=c~=q= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=OO

SKT smfp=C=kblk=f~==E=F= =K=K=K=K=K=OPSKTKN m=~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=OPSKTKO `=~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=OPSKTKP m~=~~=OP

SKU p=q=E=F= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=OQSKV ^~=t=p== =K=K=K=K=K=K=K=OQ

7 Sabre Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

TKN l==j~=a=K=K=K=K=K=K=K=K=K=K=K=K=K=K=ORTKO l~==l~=e~= =K=K=K=K=K=K=ORTKP `=_~=l~==K=K=K=K=K=K=K=K=K=K=K=K=OS

TKPKN m~===~=K=K=K=K=K=K=K=K=OSTKPKO l~=`_LqJl==DlkD==DlccD=K=K=K=K=K=OSTKPKP f~=qJl==DlccD== K=K=K=K=K=K=K=K=OTTKPKQ b~=`_LqJl==Dfpli^qbD===K=K=OUTKPKR o=b~==qJl= K=K=K=K=K=K=K=K=K=K=K=K=K=K=OVTKPKS l~=`_LqJl==Dfpli^qbD==DlkD=K=PMTKPKT `=`_==pbosf`b==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K= PN

TKQ p=l~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=POTKQKN m~===~=K=K=K=K=K=K=K=K=POTKQKO p==Dj^fk=lkD==DlccD= =K=K=K=K=K=K=K=K=POTKQKP p==DlccD==Dj^fk=lk= =K=K=K=K=K=K=K=K=PPTKQKQ p==DlccD==Db^oqe=lkD= =K=K=K=K=K=K=K=PQTKQKR p==b oqe=lkD==DlccD= K=K=K=K=K=K=K=K=PR

TKR q=o=p=`~==K=K=K=K=K=K=K=K=K=K=K=PS

8 Sabre Unit Maintenance . . . . . . . . . . . . . . . . . . . . . . . 38

UKN l~=`=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PUUKO j~~=f~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PU

UKP j~~=p=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PUUKQ pcS=f= =K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PVUKQKN pcS=d~=i~~==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PVUKQKO pcS=d~=q=r==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=PV

9 Ring Switch Remote Actuator Option . . . . . . . . . . . 40

VKN m`_=C=i=f~~=K=K=K=K=K=K=K=K=K=K=K=K=K=K=QMVKO o=^~=r=f~~==K=K=K=K=K=QNVKP j~~=l~==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=QOVKQ b~=l~==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=QPVKR _=p~=p~= K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=QQ

10 Circuit Breaker Remote Actuator Option . . . . . . . 45

NMKN o=l~=`=K=K=K=K=K=K=K=K=K=QRNMKO j~~=l~==K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=K=QRNMKP o=^~=a~= K=K=K=K=K=K=K=K=K=K=QR
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ValidityThis manual was produced in May 2010 and applies to the Sabre VRN2a unit only.

Due to W.Lucys policy of continuous research and development, W.Lucy reserves the right to change the design and

specification of its products without pr ior notice.

Safety

Operators of this equ ipment must have experience and expertise with

switchgear. To prevent personal inj ury or equipment damage this

manual must be read carefully.

This manual MUST be readily available whenever the unit is handled or

operated.

If this equipment suffers from any fault o r damage, contact the

manufacturer and/or supplier immediately.


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1 General Description

The Sabre VRN2a is compact SF6 insulated Vacuum Ring Main Unit (RMU). The unit can be mounted to the smallest distribution

transformer, or be sited in a free standing format. Designed to be used both indoors and outdoors, the unit has a long service life and

requires virtually zero maintenance.

2 Technical Data

* The weight stated is nominal and includes two ring switch cable boxes.

Sabre VRN2a

Rated Voltage 12kV(15.5kV)

Impulse Withstand Voltage 75kV(95kV)

Normal Current Ring Switches 630A

Tee-Off Circuit Breaker 250A

Short Ci rcui t Peak Makin g Current Ri ng Swi tches 50kA

Tee-Off Circuit Breaker 50kA

Short Circuit Breaking Current Tee-Off Circuit Breaker 20kA RMS

3 Second Short Time Current Ring Switches 20kA

Tee-Off Circuit Breaker 20kA

Earth Switc h Peak Maki ng Current Ri ng Swi tches 50kA

Tee-Off Circuit Breaker 7.9kA

Internal Arc Rating Freestanding 20kA 1 sec

Transformer Mounted 20kA 1 sec in ENA

housing

Optional Cable Boxes Internal Arc Rating Standard Type 12.5kA 1 sec

Gas pressure Min Operating Pressure 0 Bar G

IP Rating Up to IP54W

Weight * 350kg

Testing standards BS EN 60265-1

BS EN 60129

BS EN 60694

BS EN 60298

IEC 60056

ENA TS 41-36

IEC 62271-102

IEC 62271-100

IEC 62271-103

(Ratings in brackets are optional).


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2.1 Sabre VRN2a Dimensions

Dimensions in millimetres

2.2 Sabre VRN2a Schematic Line Diagram

(Including Cabling Boxes)


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3 Front Panel Layout

N

O

PQ

R

S

T

U

V

NM

NN

NO

OM

NV

NU

NT

NS

NR

NQ

NP

Key

1. Fascia / Front Panel

2. Optional 'Pull to Trip' Knob & 'Tripped on Fault' Indicator

Blanks

3. Circuit Breaker/T-Off Operation Slot

4. Circuit Breaker/T-Off Indicator

5. Circuit Breaker/T-Off Selector

6. Disconnector Operation Slot

7. Disconnector Indicator (Service/Earth)8. Disconnector Padlock Flap

9. Ring Switch 2 Indicator

10. Ring Switch 2 Selector

11. Ring Switch 2 Operating Aperture

12. Cable Test Access Cover

13. Ring Switch 1 Selector

14. Door

15. Ring Switch 1 Indicator

16. Ring Switch 1 Operating Aperture

17. Circuit Label - Customer customization

18. Optional VPIS plates for LH/RH Ring switches & CB/T-Off

19. SF6 Top up Valve - Hansen coupling

20. Pressure Indicator

21. Operating Handle

Operating Handle stowed on the

inside of the door

ON


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4 Design

4.1 General

The Sabre VRN2a is a non extensible RMU comprising of a tee-off vacuum circuit breaker and two fault-make load break ring

switches contained within a common SF6 gas insulated stainless steel enclosure. The unit is suitable for both indoor and outdoor

applications and can be used either as a freestanding unit, or for mounting to a transformer complying with ENATS 35-1.

4.2 Stainless Steel Gas Enclosure

The gas enclosure is manufactured from stainless steel and fabricated utilising automatic 'robot welding' techniques to produce

consistent leak- free equipment.

4.3 Housing

The housing of the Sabre VRN2a is fully treated; using zinc coated steel and electrostatically applied oven cured paint, to resist

weather and pollution attacks. All units are provided with a hinged, weatherproof and lockable door. The external support legs can

provide a Tee-Off bushing height of 1402, 1320mm or 1100mm.

4.4 Tee-Off Circuit Breaker

The tee-off circuit breaker comprises of three vacuum interrupters, which have a fault-make, fault-break rating. Opening of the circuit

breaker is achieved by manually operating the handle as standard.

Earthing of the outgoing cable, from the tee-off circuit breaker, is achieved by the use of the circuit breaker in series with the off-load

disconnector/selector switch.

4.5 Ring Swi tchesThe two ring switches are of the single break, fault-make / load- break 3 position types, 'ON', 'OFF' and 'EARTH'.

4.6 Operation

All operating positions and instructions are indicated on the main panel at the front of the unit. Operation is by means of manually

independent mechanisms, which are mounted externally to the gas enclosure.

The tee-off vacuum circuit breaker has two operating positions, 'ON' or 'OFF', with an off-load, interlocked selector allowing isolation &

earthing of the tee-off circuit.

A single, "Y"-bar type operating handle is stored at the front door. Symbols located on the end of the operating handle indicate

direction of operation.

4.7 Test Fac il it ies

The Sabre VRN2a has fully interlocked integrated ring switch cable test facilities in accordance with ENATS 41-36 requirements.Access to the test terminals is achieved by pulling a lever located on the front fascia inside the front door. This will allow the cover

underneath the unit to drop down. Where cable test facilities are required on the T-off, an alternative interlocked system, using plug-in

connectors, is available.

4.8 Interlocks

Positive safety interlocks are incorporated on all switch positions.

4.9 Padlocks

The door has a quarter-turn lock that can be padlocked. The handle has a padlock hasp hole size 8mm

diameter.

All switch and selector positions can be padlocked. The padlock hasp hole size is 8.5mm diameter.

4.10 Transformer Protection

The circuit breaker enables the VRN to protect transformers with ratings well in excess of those of a comparable HV fused unit.

Protection is achieved by the use of ring core current transformers in combination with Time Limit Fuse links or a protection relay. The

ring core current transformers are mounted around the rear tee-off bushings, external to the SF6 chamber, but within the cladding of

the unit. The Time Limit Fuses, or the protection relay, are mounted behind a cover at the front of the unit.


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4.11 Time Limit Fuse Protection (TLF)

Dual ratio CT's are provided as standard transformer protection.

Access for CT ratio change is provided by means of a cover plate on the front panel of the unit.

Recommended TLF Settings

4.12 TLF/Direct Acting Trip Protection System Diagram

Voltage Transformer Rate Power (kVA)

(kV) 200 315 500 800 1000 1250 1600

CT Ratio

50/5

earth fault setting =25A

(instantaneous trip)

TLF 3.3 10A

LV Fuse 150A

TLF 6.6 5A 10A 15A

LV Fuses 150A 250A 400A

TLF 11 3A 5A 10A 15A

LV Fuses 200A 300A 400A 560A

TLF 13.8 3A 5A 10A 15A

LV Fuses 200A 300A 400A 560A

TLF 3.3 5A 10A 15A

CT Ratio

100/5

earth fault setting =30A

(instantaneous trip)

LV Fuses 150A 250A 400A

TLF 6.6 5A 7.5A 12.5A 15A

LV Fuses 250A 400A 560A 560ATLF 11 5A 7.5A 10A 12.5A 15A

LV Fuses 400A 560A 630A 630A 630A

TLF 13.8 5A 7.5A 10A 12.5A 15A

LV Fuses 400A 560A 630A 630A 630A


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5 Sabre Unit Installation

5.1 Receipt and Storage of Unit

Units are shipped with covers closed and bolted, (all switches are in the closed position), with temporary protective covers over Tee-

Off bushings if transformer mounted. If the units are to be stored for long periods, a dry well ventilated area should be provided.

Covers should be left closed to minimise breathing especially in situations with wide daily temperature variations.

The Sabre VRN2a unit undergoes strict quality checks during manufacturing and despatch at the Lucy production facility, prior to it

being delivered to the customer. Ensure that during transit the unit has not sustained any damage, if so then contact the manufacturer

and/or supplier immediately.

DO NOT OPERATE the unit if it is damaged.

5.2 Sl inging Detai ls5.2.1 Sabre VRN2a Unit

The unit should always be lifted by using all four of the 'eye' hooks. These are located on top of the unit as shown:

5.2.2 Sabre VRN2a AMU Combination Unit

This combination unit should only be lifted as one unit using a slinging arrangement as shown below.

Electrical testing done during the commissioning phase of installation i s

to be completed by competent and responsible electrical personnel only.


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5.3 Sabre VRN2a Unit Floor Mounting Dimensions

The units are designed for bolting down onto a concrete plinth using 4 - M16 bolts.

5.3.1 Unit Locat ion

Authorities will have their preferred instructions for the installation of electrical equipment and these must be adhered to. If none are

available, however, the following sequence is recommended.

1. Prepare the plinth, casting in floor chases in accordance with the Company's contract or arrangement drawings.

2. Locate the unit, loosely assemble the floor fixings and grout in the rag bolts.

3. When the cement has hardened, tighten the fixings - shimming under the unit base as required to level the unit and ensure that it

rests equally at each fixing.

Metering Units for connection to transformers are equipped with jacking studs, which facilitate accurate final alignment with the

transformer flange.

5.4 Stand Cross Brace Removal

Once the VRN2a unit has been securely bolted to the floor as previously described or transformer mounted, the two stand front cross

braces can be removed to give more access to the cable test access area.

View From Above

Unit

These front cross braces can

be removed after installation


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5.5 Cable Terminat ion

The bushings for each ring switch are located either side of the unit. Both sets of bushings are type C with in-line bolted connections

M16 threaded in accordance with EN50181. The tee-off bushings are located at the rear of the unit and are in-line bolted connections

M12 threaded. All tee-off bushings are fitted with white stress relief collars and MUST NOT be removed unless a taper kit is being

fitted (see diagrams below).

If cabling boxes are fitted, then the bushings are accessible by removing the cabling box side cover.

The maximum cable size that can be used is:

300mm 3 - core

500mm single - core.

The following types of terminations can be used with the Sabre VRN2a:

Ring Switch

Bushings

Insulating Bushing Boot

Heat Shrink


Profile C

Bolted Separable

Contact W Lucy for fur ther

cable termination details

Tee-off Bushings Tee-off Taper Ki t(With white stress relief collar removed)



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Torque Settings On Cable Bushings

M16 into copper - 75Nm

M12 copper thread or into copper - 35Nm

Cables can be routed either side of the unit, via trenches, passages or ducts, depending on the type of cable boxes and gland plates

fitted. Shown below is a typical cable routing arrangement

.

5.6 Earthing

The Sabre VRN2a unit should be earthed at either of the primary earth points.

These earth points are located at the rear of the unit, either side of the Cable

Test Access Cover as shown.

Both T-Off and ring cable boxes

have removable panels for

increase in accessibility.

Standard ring switch cable box

shown.

Primary Earth Point

Note: It is also recommended to have at least 1.5X thread into bushing,

e.g. screw 18mm into M12 hole.


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5.7 Transformer Mounting

For direct transformer mounting, the Sabre VRN2a is fitted with a transformer mounting flange to ENA TS 35-1 (BS2562 Type E).

ENA TS 35-1 Transformer Mount ing Flange

Sabre VRN2a Tranformer Mounted

When tranformer mounting the Sabre VRN2a unit, ensure the transformer support

bracket is fitted and the unit stand is set to the 1110mm position.

5.8 Marshal ling Box

The marshalling box located on the left hand side of the unit and houses the terminals for all

customer options including ring switch actuators, pressure switch and EFI CTs.

Dimensions in mm

Transformer Support

Bracket


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6 Commissioning Tests

6.1 Main Circuit Resistance Tests

NOTE: It is recommended that Electrical Circuit Resistance readings are taken. This is to ensure good working order of all moving

parts inside the unit, and to make sure the unit is safe to operate for testing.

Resistance readings should be taken for the following circuit path for each phase:

Ring switch 1 to ring switch 2

Ring switch 1 to T-Off

Ring switch 2 to T-Off

These readings taken are to be compared with the following maximum values.

Any readings which are above these maximum values should be reported to appropriate supervising personal for review.

Circuit Resistance

Value

(microhms)

Ring Switch To Ring Switch 260

Ring Switch To T-Off 265


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6.2 Secondary Wiring Insulation Resistance Testing

Insulation resistance testing is conducted at 1kV in accordance with international standards

In addition to th is, the Sabre VRN2a unit i s also tested at 2kV during the manufacturing process and is not required to be re-

tested at this voltage level.

It is recommended that sensitive electronic devices, motors and actuators, be detached from the unit prior to testing (this

includes any case earths found on relays etc). 1kV testing across auxiliary indication wiring and contacts across EFIs/FPIs

is not recommended, unless approved by the manufacturer. If testing is conducted across such contacts, the applied test

voltage must not exceed 1kV.

6.2.1 1 kV test.

o==~==E=FK

Where units are not fitted with a removable earth link, ensure all earths are

removed from the unit, both internally and externally.

If protection relays are fitted remove the relay from its housing on the front of the

unit before commencing test.

Attach the black (negative) lead of the test set to the unit at any point where a

bolted connection is present (nut etc.).

Using the red (positive) lead as a probe, test each of the connections located on

the terminal block in the Marshalling box for approx 2 seconds.

Any indication of continuity should be investigated and rectified.

Removal of the Earth link

1. Position of earth link 2. Lift link with finger. 3. Rotate the link completely

away from the terminal.


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6.3 HV Tests Before Cabling or Connection To Transformer

The following tests are to be undertakenAFTER ensuring the Main Circuit Resistance readings are within specification (Section 6.1

Main Circuit Resistance Tests on page 14).

For HV tests, the circuit breaker must be in the ON position, and the following tests be taken through the cable terminals.

6.3.1 HV Insulation Resistance Testing

Using a suitable insulation resistance test device (1kV or 5kV dc megger), measure the insulation resistance to earth of each of the

three terminals in turn, with the other two earthed. The readings should not be less than 100 megohms, lower values may indicate

damaged or dirty insulation.

WARNING: THE FOLLOWING TESTS SHOULD NOT BE UNDERTAKEN IF THESE READINGS ARE LESS THAN 100

MEGOHMS.

6.3.2 Power Frequency Testing

These test values are to IEC 60694.

Conduct these tests as follows:

Ensure unit has correct gas pressure.

Ensure the tripper is shorted out before testing.

Ensure the VPIS (if fitted) is shorted to earth.

Follow the test schedule below (see diagram for labelling).

Apply test voltages as per table below.

The test is considered acceptable when neither breakdown

or flashover has occurred (where necessary, fit additional

insulation onto the bushings).

Test Schedule

Test Voltages (Represent 80% of the routine factory test vol tage)

6.4 Electrical Tests After Cabling or Connection To Transformer

Switch one of the ring switches into the EARTH ON position, slide the Ring Switch Selector into the centre position, then open the

cable test access cover (Section 7.5 Testing Ring Switch Cables on page 36).

Apply a test voltage of 25kV dc (or as specified by network owner) to earth for 15 minutes. Repeat tests on the other ring switch.

Note: It should be noted that for transformer connected units, the circuit breaker or selector should be in the isolating position before

proceeding to ensure the transformer does not suffer any damage.

Test RH Ring

Switch

LH Ring

Switch

Disconnector CB Switch Apply Test Voltage To: Earth

Test Phase To Phase And Phase To Earth .

1 Closed Closed Service Closed U1, W1 Frame, V3

2 Closed Closed Service Closed V1 Frame, U3, W3

3 Closed Closed Service Open U1, V1, W1 U3, V3, W3

4 Open Open Service Closed U1, V1, W1, U2, V2, W2 U3, V3, W3

Test 12kV 15.5kV Duration

(Mins)

Fit Insulation Caps

And Adaptors

1 22.4kV 30.4kV 1 Yes

2 22.4kV 30.4kV 1 Yes

3 25.6kV 36kV 1 Yes

4 25.6kV 36kV 1 Yes


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6.5 TLF Type Protection Tests

Please Note: The following test diagrams in this section are generic and explanation purposes only only for TLF type systems.

Although only 100/5 and 50/5 ratios have been used, all ratios must be tested using diagram supplied with each unit. For relay type

protection systems, refer to Section 6.6 Relay Type Protection Tests on page 21, or alternately consult the appropriate relay

technical documentation.

6.5.1 TLF Primary Injection Test - Overcurrent Test

Ensure the ring switch and circuit breaker are closed.

Setup test as shown, ensuring the removable earth link & test link are fitted and closed.

Ensure 3 phase shorting link (100A rating) is fitted as shown and replace TLF on the L1(R) and L3(B) phases with temp links.

Inject current as shown on each appropriate test phase, each time changing short links where appropriate, see table.

Repeat for each phase.

Repeat for each ratio - values to be recorded if necessary.

Test Phase TLF Shorting Link Circuit Breaker Action

IN Removed

L1(R) - L2(Y) L1(R) L3(B) No Trip

L1(R) - L2(Y) L3(B) L1(R) Trip

L2(Y) - L3(B) L3(B) L1(R) No Trip

L2(Y) - L3(B) L1(R) L3(B) Trip

L1(R) - L3(B) L1(R) L3(B) Trip

L1(R) - L3(B) L3(B) L1(R) Trip


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6.5.2 TLF Primary Injection Test - Earth Fault Test

Ensure the ring switch and circuit breaker are closed and test link is fitted and closed.

Setup test as shown, ensuring the removable earth link, test link and appropriate CT radio is fitted and closed, with the appropri-

ate CT ratio selected.

Ensure TLF on L1(R) & L3(B) phases has shorting links fitted.

Inject primary current on appropriate test phase (instantaneously), for appropriate trip values given in the table below.



q=m~ `q=o~ q=ip=

i`=_~=

^

L1(R) 50/5 25 - 30A R & B Trip

L2(Y) 50/5 25 - 30A R & B Trip

L3(B) 50/5 25 - 30A R & B Trip

L1(R) 100/5 30 - 40A max R & B Trip

L2(Y) 100/5 30 - 40A max R & B Trip

L3(B) 100/5 30 - 40A max R & B Trip


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6.5.3 TLF Secondary Injection Tests - Overcurrent Test

Ensure the circuit breaker is closed.

Setup test as shown, ensuring the removable earth link and test link are fitted and are both closed.

Ensure shorting link is fitted to the L1(R) & L3(B) TLF terminals.

Select phase to be tested, L1(R)-L2(Y), L2(Y)-L3(B) or L3(B)-L1(R).

Inject secondary current as shown on each appropriate test phase. This should be no more than 5A, each time changing shorting

links where appropriate, see table below. Please ensure correct CB action occurs.

Repeat for each phase. Repeat for each ratio - values to be recorded if necessary.

Test Phase TLF Shorting Link Circuit Breaker Action

IN Removed

L1(R) - L2(Y) L1(R) L3(B) No Trip

L1(R) - L2(Y) L3(B) L1(R) Trip

L2(Y) - L3(B) L3(B) L1(R) No Trip

L2(Y) - L3(B) L1(R) L3(B) Trip

L1(R) - L3(B) L1(R) L3(B) Trip

L1(R) - L3(B) L3(B) L1(R) Trip


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6.5.4 TFL Secondary Injection Test - Earth Fault Test

Ensure the ring switch and circuit breaker are closed, and that the test link is fitted and closed.

Setup test as shown, ensuring the removable earth link & test link are fitted and closed, and that the appropriate CT ratio is

selected.

Ensure TLF on L1(R) & L3(B) phases has shorting links fitted.

Inject secondary current on appropriate test phase (instantaneously), for appropriate trip values given in table below.



q=m~ `q=o~ q=ip=

i

`=_~=

^

L1(R) 50/5 2.0 - 2.7A R & B Trip

L2(Y) 50/5 2.0 - 2.7A R & B Trip

L3(B) 50/5 2.0 - 2.7A R & B Trip

L1(R) 100/5 1.2 - 1.65A R & B Trip

L2(Y) 100/5 1.2 - 1.65A R & B Trip

L3(B) 100/5 1.2 - 1.65A R & B Trip


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6.6 Relay Type Protection Tests

Please Note: The following test diagrams in this section are generic and only explanation purposes for relay type systems. Although

only 200/1 and 100/1 ratios have been used, all ratios must be tested using diagram supplied with each unit. For TLF type protection

systems, refer to the Section 6.5.1 TLF Primary Injection Test - Overcurrent Test on page 17, or alternately consult the

appropriate TLF technical documentation.

6.6.1 Relay Primary Injection Test - Overcurrent Test



Ensure the 3 phase shorting link (100A rating) is fitted as shown.

Setup relay for overcurrent test, including settings.

Apply the appropriate test current to the relay setting and CT ratio.




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6.6.2 Relay Primary Injection Test - Earth Fault Test



Setup relay for earth fault test, including settings.

Apply the appropriate test current to teh relay setting and CT ratio.



6.6.3 Relay Secondary Injection Tests - Overcurrent and Earth Fault Test

Consult the appropriate relay technical documentation for recommended secondary injection procedure, commissioning checks and

any necessary equipment required.


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6.7 VPIS & NEON Indication (if fitted)

Both VPIS (voltage presence indication system) & neon indication systems are available as an option.

The VPIS system is generally in accordance with IEC 61958 and is complete with voltage limiting devices to ensure safety in the

event of an insulation failure.

VPIS can be used to test both for correct phase orientation of cables and for the presence of voltage. The VPIS system can be the

Pfisterer type (4mm sockets HR system using relevant HR adapters) which comply with IEC 61243-5 either with or without push

button neons.

The following checks should be made during commissioning where applicable.

6.7.1 Pickup voltage

For a 12kV unit this value will be below 5kV.

Using a high voltage test set, apply the appropriate voltage to the unit between the selected phase (left or right side) and earth.

Insert the appropriate neon test device into the relevant socket and check that voltage presence is indicated by the flashing neon

(in some cases the flashing may be very rapid and appear as continuous).

6.7.2 Crossover voltage

Once it is determined that the Neon indicators are functional and correct pickup values determined, proceed to completing a

crossover check. Test as follows:

Using a high voltage test set, apply the appropriate voltage to the unit between the selected phase (left or right side) and earth.

For 12kV units this is normally 6.9kV.

Insert a neon indicator into the appropriate phase and check operation.

With power maintained on the unit, check each of the other phase neon's (both left and right) for any indication of voltage. There

should be no indication on the other phases.

6.7.3 Phase comparator

The Pfisterer phase comparator can be used to determine correct phase connection of a cabled unit. Test as follows:

Ensure both ring switches are open if the HV cables are going to be used to carry out the test.

For 12kV and higher system voltages, ensure the HR - LRM adapter is inserted into the sockets (or the Pfisterer converter).

Pfisterer Type 4mm Sockets

Pfisterer Type 4mm Sockets


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Connect the comparator according to the manufacturer's instructions and check the unit for correct connection of phase cables

according to the coloured lights.

The comparator can also be used as a neon voltage presence indicator.

6.8 Shunt Tr ip (i f fi tted)

Where shunt trip terminals have been fitted in the marshalling box, the following procedure is to be followed to ensure effective

operation of the shunt trip device.

Locate the shunt trip terminals on the marshalling box using the supplied wiring diagram to confirm the terminal numbering.

Using appropriate test set, apply voltage to the two previously identified terminals.Note:

If the unit is fitted with a DC shunt coil then tests should be done at 70% & 110% rated voltage.

If the unit has an AC coil fitted, then testing should be done at 85% & 110% of rated voltage.

The unit should trip.

The operation of the shunt trip device is thereby confirmed. Any unexpected tripping operation during testing should be investi-

gated and reported to the appropriate responsible person/supervisor.

6.9 Auxi liary Wiring Switch testing

Auxiliary wiring should be checked for continuity as well as various auxiliary switches and contacts. Please refer to the supplied

marshalling box wiring diagram.

The following are to be checked on the unit, to ensure correct operation, before completing installation:

Ring switch auxiliary contacts.

CB/T-Off auxiliary contacts.

Motorization indication circuits - operation of motor actuation should be checked if fitted/supplied with the unit.


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7 Sabre Operation

7.1 Opening the Main Door

7.2 Obtaining the Operating Handle

Check the pressure indicator on the front panel, behind main door.

Ensure the pointer is in the green zone before any switching

operations are carried out.

1. Open the door by turning handle clockwise by 90. 2. When the door catch releases open the main door.

1. Operating handle in stowed position inside main door. 2. Lift handle and remove as shown.


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7.3 Circuit Breaker Operation

7.3.1 Padlocking to prevent operation

7.3.2 Operate CB/T-Off from 'ON' to 'OFF'

1. Slide the 'Disconnector Padlock Flap' to the right to lock all

CB/Tee-Off operations and lock flap using a padlock as

shown.

2. Remove padlock from the 'Disconnector Padlock Flap', then

slide the selector left to the 'CB AND DISCONNECTOR

FREE' position.

1. Insert the operating handle into the 'Circuit Breaker

Operation Slot' as shown.

2. Firmly lift the operating handle up from the 'ON' to the 'OFF

& RESET' position.

The circuit breaker indicator will now show 'off' as shown:

3.Remove operating handle.

! Note: Ensure the 'Disconnector Padlock Flap' is in the 'CB AND DISCONNECTOR FREE' position before operation (Section

7.3.1 Padlocking to prevent operation on page 26).

Remove padlock for operation


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7.3.3 Isolate T-Off from 'OFF' position

1. With the circuit breaker in the 'OFF & RESET' position

(Section 7.3.2 Operate CB/T-Off from 'ON' to 'OFF' on

page 26), slide the 'Circuit Breaker/T-Off Selector' to the

'DISCONNECTOR' (centre) position as shown.

2. Insert the operating handle into the 'Disconnector


3. Firmly lift the operating handle up from the 'SERVICE' to the

'ISOLATE' position.

The CB/T-Off Disconnector indicator will now show 'Isolated'

and 'Earth Selected' as shown:

4. Remove operating handle.




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7.3.4 Earth CB/T-Off from 'ISOLATE' position

1. With the circuit breaker'OFF' and the Disconnector in

'ISOLATE', slide the 'Circuit Breaker/T-Off Selector' left to

the 'CB EARTH' position as shown.



3. Firmly pull the operating handle down from the 'OFF &

RESET' to 'ON' position.

The circuit breaker indicator will now show 'earth on'

as shown:





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7.3.5 Remove Earth from T-Off



2. Firmly lift the operating handle up from the 'ON' to the 'OFF

& RESET' position.

The circuit breaker indicator will now show 'off' as

shown:





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7.3.6 Operate CB/T-Off from 'ISOLATE' to 'ON'

1. With the circuit breaker in the 'OFF & RESET' position

(Section 7.3.5 Remove Earth from T-Off on page 29),

slide the 'Circuit Breaker/T-Off Selector' to the

'DISCONNECTOR' (centre) position as shown.

2. Insert the operating handle into the 'Disconnector Operation

Slot' as shown.

3. Firmly pull the operating handle down from the 'ISOLATE' to

'SERVICE' position.

The CB/T-Off Disconnector indicator will now show

'Service' as shown:





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7.3.7 Close CB to SERVICE

1. Slide the 'Circuit Breaker/T-Off Selector' to the 'CB

SERVICE' position as shown.



3. Firmly pull the operating handle down from the 'OFF &

RESET' to 'ON' position.

The circuit breaker indicator will now show 'on' as

shown:





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7.4 Switch Operat ion

The movement of the Ring Switch Selector can be restricted depending on the position of the Ring Switch. Full Ring Switch

Selector movement is only available with the Ring Switch in the Off position.

7.4.1 Padlocking to prevent operation

7.4.2 Switch from 'MAIN ON' to 'OFF'

1.With either of the 'Ring Switches' in any position, the corresponding 'Ring Switch Selector' can be slid into the centre position and

padlocked, preventing any operation of the ring switch.

1. Slide the 'Ring Switch Selector' to the 'Main Switch ' position

as shown.

2. Locate the operating handle to the 'Ring Switch'.

3. Rotate the operating handle from the 'MAIN ON' to the 'OFF'

position as shown. Note the arrow directions on the handle.

The 'Ring Switch' indicator will now show 'OFF' as shown:

4. Padlock the 'Ring Switch Selector' in the centre position to

prevent operation (Section 7.4.1 Padlock ing to prevent

operation on page 32).


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7.4.3 Switch from 'OFF' to 'MAIN ON

1. Slide the 'Ring Switch Selector' to the 'MAIN SWITCH'

position as shown.


3. Rotate the operating handle from the 'OFF' to the 'MAIN ON'

position as shown. Note the arrow directions on the handle.

The 'Ring Switch' indicator will now show 'MAIN ON' as shown:


prevent operation (see Section 7.4.1 Padlock ing to

prevent operation on page 32).


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7.4.4 Switch from 'OFF' to 'EARTH ON'

1. Slide the 'Ring Switch Selector' to the 'EARTHING SWITCH'

position as shown.2. Locate the operating handle to the 'Ring Switch'.

3. Rotate the operating handle from the 'OFF' to the 'EARTH

ON' position as shown. Note the arrow directions on the

handle.

The 'Ring Switch' indicator will now show 'EARTH ON' as

shown:


prevent operation (see Section 7.4.1 Padlocking to

prevent operation on page 32).


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7.4.5 Switch from EARTH ON' to 'OFF'

1. Slide the 'Ring Switch Selector' to the 'EARTHING SWITCH'

position as shown.


3. Rotate the operating handle from the 'EARTH ON' to the

'OFF' position as shown. Note the arrow directions on the

handle.

The 'Ring Switch' indicator will now show 'OFF' as shown:


prevent operation (see Section 7.4.1 Padlocking toprevent operation on page 32).


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7.5 Testing Ring Switch Cables

For this operation, please ensure the relevant ring switch is in the 'EARTH ON' position and

the 'Ring Switch Selector' is in the centre position, padlocked if applicable (as shown) as the

cable test access cover is NOT interlocked.

1. Open cable test access cover by holding the test box, pulling

the access knob forward, and then lower the test access

cover.

2. Move the interlock flap out of the way of the required ring

switch test bushings.

3. Insert the operating handle into the star point earth bar and

pull down away from the bushings.

4. When the star point earth bar is clear from all the bushings,

remove the operating handle and allow to pivot down into the

access cover as shown.

5. Test connections can be now made onto the bushings

marked with the relevant phase (red, yellow, blue or L1, L2,

L3).

Note: With the star point earth bar removed access to

operate the ring switch is prevented.


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Returning star point earth bar to its closed positi on.

The ring switch can now be operated 'EARTH ON' to 'OFF' (seeSection 7.4.5 Switch from EARTH ON' to 'OFF' on page 35).

Ring Switch Cable Test Padlock Facility

Access to the star point earth bars can be prevented by using a padlock for each

ring switch as shown.

To allow access to a star point earth bar, remove the padlock on the side of the

required earth bar, then slide the padlock flap clear.

6. Close the star point earth bar by pivoting it towards the

bushings by hand. Move the padlock flap clear, then insert

the handle into the socket and drive the earth bar firmly onto

the bushings. Ensure full contact of the earth bar onto the 3

bushing contacts.

7. Close the 'Test Access Cover' by lifting and ensuring catch

lock is located fully.


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8 Sabre Unit Maintenance

8.1 Operat ing Condit ions

'Ideal' in-service conditions

Unit is to be installed and commissioned in accordance with manufacturers instructions.

Humidity below 40% with no dripping water.

Indoors completely protected from the weather.

Minimal dust and adequate air circulation.

Ambient temperature between -5 C and 40C.

No contact with chemical agents.

No infestation of any animals.

No contact with any plant life.

No foundation movements.

No damage to the unit of any kind.

'Standard' in-service conditions

Unit is to be installed and commissioned in accordance with manufacturers instructions.

Humidity below 60%.

Unit used indoors or outdoors, but not subjected to extreme weather conditions eg: ice, snow, dust storms, heavy rain etc.

Ambient temperature between -25 C and 40C.

No regular or thick covering of leaves or debris.

No contact with chemical agents.

No infestation of any animals.

No contact with any plant life.

No foundation movements.

No damage to the unit of any kind.

'Aggressive Conditions' are any other conditions not covered in the description of IDEAL and STANDARD conditions.

8.2 Maintenance Intervals

The following maintenance intervals should be adhered to for optimal operation of the unit.

8.3 Maintenance Schedule

The following is the recommended maintenance schedule for the Sabre VRN2a:

Gas Enclosure: No routine maintenance required.

Housing Interior: Performed with the main door open if the unit is an outdoor unit.

Outdoor Unit:

Check the condition of the main door seal

Check the inside of the door for:

- Heavy dust deposits

- Water ingress

- Contamination by animal, insect or plant life

Conditions

'Ideal' 'Standard' 'Aggressive'

Gas Enclosure No Attention No Attention No Attention

Housing Interior No Attention No Attention Every 5 Years

Housing Exterior No Attention Every 5 Years Every 2 Years


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Indoor and Outdoor Units:

Check that the protector cap is fitted over the SF6 filler valve

Check the operation of the unit (including interlocks with the unit isolated)

Clean the unit thoroughly

Touch up paint-work as necessary

Check that the SF6 gas indicator is in the Green Zone

- If the indicator is in the Red Zone, refer to Section 8.4.2 SF6 Gas Topping Up on page 39.

Housing Exterior:

Indoor and Outdoor Units:

Check that all external fixings are present and tight

Check that all labels are present

Check that all earth connections are present

Clean the unit thoroughly

Touch up paint-work as necessary

If a unit has not been operated for a considerable time, and if it is practicable to do so , operate it a few times to ensure that

switch is functioning co rrectly.

8.4 SF6 Issues8.4.1 SF6 Gas Leakage

1. If the unit suffers a loss of gas pressure the pointer will be in the Red Zone. In this extremely unlikely event the following

procedure should be followed.

2. If the gas pressure indicator is showing no pressure then do not operate any part of the switchgear and contact you local

Lucy Switchgear office immediately.

3. If the gas pressure indicator is in the red zone, but still registering some pressure, proceed to Section 8.4.2 SF6 Gas

Topping Up on page 39. It is safe to operate the switchgear in this condition. If this is not possible contact your local Lucy

Switchgear office as soon as possible.

4. If, after topping up, the gas pressure indicator continues to show a drop in pressure contact your local Lucy Switchgear office.

8.4.2 SF6 Gas Topping Up

The SF6 top up valve is located under the pressure gauge on the front panel as shown:

The unit should be filled to the recommended pressure using either a temperature compensated gauge on the regulator head of the

SF6 supply or, where such a gauge is unavailable, compensating for temperature using a graph.

Before filling the switchgear, all pipes and fittings must be purged using SF6 to avoid any impurities inadvertently entering the unit or

contaminating the filling valve (Hansen valve B2H16-BS) on the unit. SF6 gas to IEC 60376 must always be used.

Note: Ensure all SF6 gas handling equipment is in good condition and moisture free.

Hansen coupling behind

protective cap


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9 Ring Switch Remote Actuator Option

The following installation procedures apply to both left hand and right hand remote actuator unit options.

9.1 PCB & Loom Instal lat ion

1. Using the supplied screws, fit the PCB inside the marshalling

box as shown.

2. Plug the connector loom onto the pcb as shown.

LH Actuator

RH Actuator

3. Attach the switch labels as shown. 4. For connecting the Gemini umbilical cable into the

marshalling box terminals, please refer to Lucy document

no:-

DOC00041 - Gemini V1.2 To Lucy RMU Actuato r

Wiring Schedule..


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9.2 Remote Actuator Unit Installation

1. Slide the 'Ring Switch Selector' to the 'Main Switch ' position

as shown.

2. Insert the two location stud assemblies through the remote

actuator mounting plate as shown.

3. Ensure the actuator units location collar has the slot in the

same orientation as the ring switch. The collar can be

adjusted to the correct position by pulling out and rotating.

4. Locate the actuator unit into the ring switch aperture and

screw in the two location studs by hand.

6. Secure the actuator unit with the two M12 nuts and washers,

using the box spanner supplied.

5. Using a suitable screwdriver, tighten the location studs as

shown.


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Note: For the actuator to operate remotely the following conditions must apply:-

1.The actuator unit shutter must be in the ACTUATOR position.

2.The ring switch selector must be in the MAIN SWITCH position..

3.The actuator unit plug must be connected.

9.3 Manual Operat ion

With the remote actuator fitted, the ring switch can be operated manually by following this procedure.

7. Plug the actuator unit lead into the Sabre units socket on the

left hand side of actuator unit and screw in collar as shown.

8. The remote actuator is now ready for operation.

1. Slide down the shutter to the Manual position. 2. Remove the Disengage boss from the top of the remote

actuator unit and insert as shown.


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After manual operation, the remote actuator unit will automatically re-engage when remote operation is again required.

9.4 Ear th Operat ion

A ring switch can only be switched to the earth position manually. The following procedure describes how to switch to the earth

position when a remote actuator unit is fitted.

1. Firstly follow the previous procedure (Section 9.3 Manual Operation on page 42) to disengage the remote actuator unit from the

ring switch.

3. Firmly push the boss inwards to disengage the unit from the

ring switch.

4. Remove the Disengage boss and insert the operating

handle.

5. The ring switch can now be operated manually.

2. Once the unit has been disengaged loosen both mounting

nuts and washers using the box spanner supplied.3. Pull the remote actuator unit away from the ring switch.


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9.5 Box Spanner Storage

The supplied box spanner is to be (when not needed) stored using the clip mounted on the inside of the main door as shown.

4. Slide the Ring Switch Selector to the Earthing Switch

position.

5. Refit the remote actuator unit and tighten the 2 M12 nuts

using the box spanner.

6. Insert into the remote actuator unit the operating handle and

rotate from the OFF to EARTH ON position.


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10 Circuit Breaker Remote Actuator Option

The circuit breaker remote actuator is located (if fitted) on the right hand side of the unit

as shown.

10.1 Remote Operation Conditions

The operation of the circuit breaker remote actuator can only be permitted when:-

i) the disconnector is in the SERVICE position (Section 7.3.6 Operate CB/T-Off from

'ISOLATE' to 'ON' on page 30).ii) the circuit breaker and disconnector operation shutters are closed (See Section 7.3.1

Padlocking to prevent operation on page 26 and Section 7.3.7 Close CB to SERVICE

on page 31).

10.2 Manual Operation

With the remote actuator fitted, the circuit breaker can be operated manually by opening

the circuit breaker shutter and inserting the operating handle. The circuit breaker can now be operated

manually.

After manual operation, the remote actuator unit will automatically reset when remote operation is

again required.

10.3 Remote Actuator Disengage

If a power failure occurs during a circuit breaker OFF & RESET to ON remote operation, it can becontinued manually by opening the circuit breaker shutter and inserting the operating handle.

If a power failure occurs during a circuit breaker ON to OFF & RESET remote operation, it can be

continued manually by:

When power is re-applied the remote actuator will automatically re-engage when remote operation is again required.

Remote Actuator Unit Cover Padlock

Access to the circuit breaker remote actuator unit can be prevented by using a padlock on the cover

as shown.

1. Open the remote actuator unit cover by undoing the captive

screw.2. Firmly push in the actuator boss to disengage the actuator

gearbox.

Captive Screw

3. The circuit breaker operation can now continue manually by

opening the circuit breaker shutter and inserting the

operating handle.


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Ring Main Manual

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