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Switchgear From stock · used switchgear

Siemens 8DJ20, 12 kV

SF₆-insulated ring main unit (scheme 10) built in 2010: two ring cable feeders and one transformer feeder with HV fuses. Dismantled in working order and available from stock.

Front: ring cable feeders Q1 and Q2 and transformer feeder Q3

Siemens nameplate type 8DJ20.10 (12 kV, 2010) with the ready-for-service indicator on green

Q1 ring cable feeder with Horstmann ALPHA E and HR-ST voltage indicators

Main nameplate

Rated values

Type Siemens 8DJ20.10 · Ring main unit (RMU)

Year of manufacture 2010

Serial number CV 806756-000020/001

Rated voltage (Ur) 12 kV

Rated frequency (fr) 50/60 Hz

Lightning impulse withstand voltage (Up) 75 kV

Power-frequency withstand voltage (Ud) 28 kV

Short-time withstand current, main circuit (Ik, tk) 20 kA / 1 s

Peak withstand current (Ip) 50 kA

Short-circuit making current, main circuit (Ima) 50 kA

Internal arc classification IAC A FL 20 kA, 1 s

Insulating gas SF₆ · max. 2,2 kg

Rated filling pressure, absolute (pre) 150 kPa (20 °C)

Permissible ambient temperature −40 °C … +70 °C

Mass (catalogue, depending on height) 280–340 kg

Standard IEC 62271-200

Operating instructions (nameplate) 817-6637.0

Standard dimensions, W × D × H 1060 mm × 775 mm × 1200 / 1400 / 1760 mm

Width and depth for scheme 10 from Siemens catalogue HA 45.31; the height depends on the subframe and has not been measured on this unit. Above +40 °C Siemens specifies reduced rated currents.

Panel configuration

RK – RK – T: two ring cable feeders and one transformer feeder

Values from the nameplate, which lists the cable feeders and the transformer feeder separately. Rows marked "catalogue" come from Siemens catalogue HA 45.31 for 12 kV.

2 × Ring cable feeder · Q1, Q2

Three-position switch-disconnector (closed, open, earthed) for the ring cable, with make-proof earthing.

Switch-disconnector, rated current (Ir): 630 A
Load-breaking operations (n): 100
Earthing switch, class: M0, E3
Standards: IEC 60265-1 · IEC 62271-102

Fitted equipment

Horstmann ALPHA E · short-circuit indicator
Horstmann HR-ST · capacitive voltage detection, HR system, IEC 61243-5

Transformer feeder · Q3

Three-position switch-disconnector with HV fuse-links for transformer protection. A blown fuse trips the switch through the striker.

Switch-disconnector, rated current (Ir, depends on fuse-link): 200 A
Short-circuit making current (Ima, catalogue): 25 kA
Fuse striker: IEC 60282-1, medium
Fuse-link dimensions (catalogue): DIN 43625
Standards: IEC 62271-105 · IEC 62271-102

Photos

The unit as it is in stock

Q2 ring cable feeder with Horstmann ALPHA E and HR-ST voltage indicators

Q3 transformer feeder; the mimic diagram shows the HV fuse

Condition

Condition and terms

Used switchgear, built in 2010.
Dismantled in working order.
Sold without warranty.
Price on request.
The ready-for-service indicator (gas density) showed green when photographed. According to Siemens, green means ready for service.
Contains up to 2.2 kg of SF₆. Under the EU F-gas Regulation, installation and work on the gas system require certified personnel.

Documents

Datasheets and manufacturer documents

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