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SECTOSSF6 load break fault make switches for overhead networks

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Distribution network

Sectos NXB + DTU

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Definition of a Switching Device

Open a circuit

Close a circuit

Open a Load Close a Fault

A switch CAN A switch CAN NOT Open a Fault

A disconnectorMust provide a safe isolating distance

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Sectos

Sectos switch-disconnector

12…24 kV (BIL max. 125 kV) 24…36 kV (BIL max. 170 kV)NXB technology NXA technology

NXB NXBD

Motor up Manual

Conical epoxy bushings

Outdoor epoxy bushings

NXA

Motor down

Conical epoxy bushings

ManualMotor up

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Sectos

NXA 36kV, 630A

NXB 12...24kV, 630A

NXBD 12...24kV, 630A

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Sectos NXA

36kV (38kV ANSI)

2-position load break-fault make switch

single or double spring mechanism

Manual or motor operated

Manual operation by hook stick

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Sectos NXA

Insulation level (IEC 60265-1 (1998))

Rated voltage 36 kV

Power frequency withstand voltage, 60 sec wet- to earth and between phases 70 kV- across isolating distance 80 kV

Lighting impulse withstand voltage- to earth and between phases 170 kV- across isolating distance 195 kV

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Sectos NXA

Current ratings (IEC 60265-1 (1998))

Electrical endurance class E2 / E3

Rated normal current 630 A

Mainly active load breaking current 630 A / 400 A

Number of breaking operations CO 50 / 100

Closed loop breaking current 630 A

Line-charging breaking current 40 A

Cable-charging breaking current 40 A

Earth fault breaking current 175 A

Cable charging breaking currentunder earth fault conditions 87 A

No-load transformer breaking current 20 A

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Sectos NXA

Short-circuit ratings (IEC 60265-1 (1998))

Electrical endurance class E2 / E3

Short-time withstand current, Ith (3 s) 12,5 kA

Peak withstand current, Idyn, peak 31,5 kA

Short-circuit making current 31,5 / 25 kA

Number of making operations 3 / 5

Mechanical endurance class M2

Number of close-open operations 5000

Ambient air temperature limits -40...+60 oC

Filling pressure 1.5 bar (abs)

Weight with plug-in insulators 95 kg

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Sectos NXB

12, 17.5 and 24kv

2- or 3-position load break-fault make switch

Single or double spring mechanism

Manual or motor operated

Manual operation by hook stick

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Sectos NXB

Insulation level (IEC 60265-1 (1998))

Rated voltage kV 12 17.5 24

Power frequency withstand voltage, 60 sec wet

- to earth and between phases kV 28 38 50- across isolating distance kV 32 45 60

Lighting impulse withstand voltage- to earth and between phases kV 75 95 125- across isolating distance kV 85 110 145

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Sectos NXB

Current ratings (IEC 60265-1 (1998))

Rated normal current 630 A

Mainly active load breaking current (100 CO) 630 A

Line-charging breaking current 50 A

Cable-charging breaking current 50 A

Earth fault breaking current 50 A

Cable charging breaking currentunder earth fault conditions 28 A

No-load transformer breaking current 6.3 A

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Sectos NXB

Short-circuit ratings (IEC 60265-1 (1998))

Short-time withstand current, Ith (3 s) 20 kA

Peak withstand current, Idyn, peak 50 kA

Short-circuit making current 50 kA

Number of making operations n

- main switch 50 kA (CL E2) 3

- main switch 31.5 kA (CL E3) 10

- earthing switch 50 kA (CL E2) 3

- earthing switch 31.5 kA (CL E3) 5

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Sectos NXB

Mechanical endurance (IEC 60265-1 (1998))

Number of close-open operations n

- main switch 5000

- earthing switch 1000

Ambient air temperature limits -40...+60 oC

Filling pressure (abs) 1.5 barWeight

- cast resin insulators 81 kg

- silicone insulators 82 kg

- without bushing 71 kg

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Sectos NXBD

12, 17.5 and 24kV

Two switches in same housing two switched ways and one tapped

way

2- or 3-position load break-fault make switches

single or double spring mechanism

Manual operation by hook stick

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Sectos

Silicone rubber insulators

Series 400 Outer Conebushings, M16

Reliable position indicator

Rating plate

Earthing terminal

Gas filling valve

Stainless steel housing (sealed pressure system, IEC 56)

Hook-stick lever

Terminal pad

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Details

Large position indicator symbols

Reflective colours

The reliable indication of the device fulfills the design and testing of IEC 129 A2

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Details

Mechanical housing made of aluminium alloy

Stainless steel spring mechanism

IPX7

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Details

Manual operation, single spring mechanism

Motor operation, single spring mechanism

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Temperature compensated gas density switch as standard

Optional gas density gauge

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Details

Optional low gas locking mechanism

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Details

Stainless steel housing

AISI 304

Laser cut, robot welded

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Details

Outer cone bushings, series 400

Flexible plug-in silicone rubber insulators

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Details

Hook-stick lever (3 position switch)

Hook-stick lever (2 position switch) + optional locking device

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Accessories

Many different types of mounting accesories

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Accessories

Different types of terminal pads

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Current Transformer

Ring type transformer, installed around the bushings

Type: KOKU 072 G4

Ratio: 600/1 A

Burden/Class 3 VA / 5P10

0.5 VA / 5P20

Standards IEC 185

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DTU (Distribution Terminal Unit)

REC 501 Digital inputs

24 VDC battery

1…2 contactor logic with local control push buttons and MCB’s

Place for communication device

Heating element

IP55 stainless steel enclosure

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DTU (Distribution Terminal Unit)

REC 523 Digital inputs (15 pcs)

Analog inputs for measuring transformers and sensors (3…9pcs)

24 VDC battery

1…4 contactor logic with local control push buttons and MCB’s

Place for communication device

Heating element

IP55 stainless steel enclosure

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REC 5xx

REC 501 REC 523

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Desired Signals

Some key signals which are desired from a remotely controlled switch

Position: OPEN / CLOSE / EARTH

Operation: LOCAL / REMOTE

Gas level: Enough gas to permit safe operation

Battery status: enough to operate the switch and maintain communication

Cabinet temperature

Door alarm

Fault passage indicator

Fault passage counter

Measurements: Voltage, Current

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REC 5xx

Network Control protocol

Network controlsystem

Remote-controlledequipment

RMU

Disconnector

DLC

Modem

Radio

DLC

Modem

Radio

REC 5xx

Optionalmodem

Public line

Leased lines

Optionaladapter

Optical cable

RS 232

Modem

A GSM AGSM

Adapter

Radio modem Radio modem

Compact switchgear

• LON / SPA interface ( REC 501 only SPA)• RS232 interface• Fibre-optic connection• Radio modem• Modem (option) for

- conventional radio telephone- fixed or switched cable connection- leased or public telephone lines- GSM

• DLC

Communication media Protocols• SPA• LON (for REC 501 with adapter)• ANSI X3.28 • RP570 (REC 501)• IEC 870-5-101• DNP 3.0• MODBUS• Others...

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Feeder Automation Ready Solutions

Ready-made, fully tested packages Sectos

DTU

REC 523

From remotly controllable packages to automatic sectionalizer functions with current and voltage logic

I O

Controlcircuits

Control box

Control cable

Measuring cable

CT:s

OptionalVT

Surge arresters

Connection boxM

NXB_ 3-pos. switch

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Feeder Automation Ready Solutions

I O

Controlcircuits

Control box

Control cable

Measuring cable

CT:s

OptionalVT

Surge arresters

Connection boxM

NXB_ 3-pos. switch Sectos NXB switch-disconnector

Motor operating device integrated in the switch

CT’s installed around the bushings

Cable for motor control , position indication and gas density monitoring

Control box type DTU131 including REC 523

Optional VT’s for power supply and voltage measurement

Surge arresters recommended as an option

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Vegetation, nesting birds and other animals?

The sealed enclosure eliminates risks from environmental hazards and increases the reliability of electrical distribution systems.

Solved by Sectos!

Cali, Colombia

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Salt, sand, moisture and pollution?

The enclosure of stainless steel is hermetically sealed and corrosion resistant. The hydrophobic silicone rubber insulators are well suited even to the most extreme conditions.

Solved by Sectos!

Israel Norway China

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Ice, snow and high altitudes?

The switch inside the sealed tank in an inert SF6 gas atmosphere is insensitive to outside pressure changes. Sectos is also practically maintenance-free.

Solved by Sectos!Finland

Bolivia (3750 m)

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Tölby station outside Vaasa, Finland

SECTOS NXBD24. Double switch-disconnectors 2pcs. All 4 motors remote controlled from same DTU131 operating box using REC523 type of RTU.

Before