SF6 load break fault make switches for overhead networks SECTOS SF6 load break fault make switches for overhead networks

Distribution network Sectos NXB + DTU

Definition of a Switching Device A switch CAN A switch CAN NOT Open a circuit Close a circuit Open a Load Close a Fault Open a Fault A disconnector Must provide a safe isolating distance

Sectos Sectos switch-disconnector NXB technology NXA technology NXB 12…24 kV (BIL max. 125 kV) 24…36 kV (BIL max. 170 kV) NXB technology NXA technology NXB NXBD NXA Motor up Manual Motor up Motor down Manual Conical epoxy bushings Outdoor epoxy bushings Conical epoxy bushings

Sectos NXA 36kV, 630A NXB 12...24kV, 630A NXBD

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

Insulation level (IEC 60265-1 (1998)) 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

Current ratings (IEC 60265-1 (1998)) 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 current under earth fault conditions 87 A No-load transformer breaking current 20 A

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

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

Insulation level (IEC 60265-1 (1998)) 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

Current ratings (IEC 60265-1 (1998)) 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 current under earth fault conditions 28 A No-load transformer breaking current 6.3 A

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

Mechanical endurance (IEC 60265-1 (1998)) 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 bar Weight - cast resin insulators 81 kg - silicone insulators 82 kg - without bushing 71 kg

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

Sectos Rating plate Silicone rubber insulators Earthing terminal Gas filling valve Stainless steel housing (sealed pressure system, IEC 56) Silicone rubber insulators Series 400 Outer Cone bushings, M16 Hook-stick lever Reliable position indicator Terminal pad

Details Large position indicator symbols Reflective colours The reliable indication of the device fulfills the design and testing of IEC 129 A2

Details Mechanical housing made of aluminium alloy Stainless steel spring mechanism IPX7

Details Manual operation, single spring mechanism Motor operation, single spring mechanism

Details Temperature compensated gas density switch as standard Optional gas density gauge

Details Optional low gas locking mechanism

Details Stainless steel housing AISI 304 Laser cut, robot welded

Details Outer cone bushings, series 400 Flexible plug-in silicone rubber insulators

Details Hook-stick lever (3 position switch) Hook-stick lever (2 position switch) + optional locking device

Accessories Many different types of mounting accesories

Accessories Different types of terminal pads

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

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

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

REC 5xx REC 501 REC 523

Some key signals which are desired from a remotely controlled switch 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

REC 5xx Communication media Protocols Network Control protocol Network control system Remote-controlled equipment RMU Disconnector DLC Modem Radio REC 5xx Optionalmodem Public line Leased lines Optional adapter Optical cable RS 232 A GSM Adapter Radio modem Compact switchgear Communication media Protocols 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 SPA LON (for REC 501 with adapter) ANSI X3.28 RP570 (REC 501) IEC 870-5-101 DNP 3.0 MODBUS Others...

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

Feeder Automation Ready Solutions 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

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

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

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)

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