2, WDQ series DC switchgear

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product introduction:
DC switchgear is the key power distribution equipment of DC traction power supply system such as subway, light rail, tram, trolley bus and mine electric locomotive. It is mainly used for receiving, distributing, controlling, protecting and monitoring of DC power supply to ensure the safe, reliable and continuous operation of traction power supply system. It is suitable for DC750V and DC1500V traction power supply systems, installed in traction substation, to complete switch

product introduction:

DC switch cabinet is the key power distribution equipment of DC traction power supply system such as subway, light rail, tram, trolley bus, mine electric locomotive, etc. It is mainly used for receiving, distributing, controlling, protecting and monitoring DC power supply to ensure the safe, reliable and continuous operation of traction power supply system. It is suitable for DC750V and DC1500V traction power supply systems, installed in traction substation, to complete switch control and fault protection of DC incoming line, feeder line, negative pole, return flow, cross-zone and other circuits, and provide stable and safe DC power supply for trains.

product features:

  1. safe and reliable, breaking capacity, the use of special DC fast circuit breaker, excellent arc extinguishing performance, short circuit breaking speed, can effectively limit the fault current, protect equipment and personal safety.
  2. protection is perfect and the action is accurate. The DC comprehensive protection device is equipped with full-function protection such as over-current, quick-break, counter-current, overheating, ground fault, disconnection monitoring, etc., with rapid response and accurate action.
  3. runs stably, has strong impact resistance, adapts to the load fluctuation caused by frequent starting and braking of the train, has a wide voltage adaptation range and stable output, and meets the large impact current working condition of traction power supply.
  4. has compact structure, reasonable layout, standardized cabinet design, and the circuit breaker adopts handcart structure, which has good heat dissipation and is easy to install, operate and maintain.
  5. Intelligent monitoring, easy operation and maintenance, support telemetry, remote communication, remote control, remote adjustment, can be connected to the integrated automation system, remote monitoring, fault recording, event recall, improve the level of automation.

technical parameters:

Project

Unit

parameters

Nominal voltage

V

DC750

DC1500(1650)

Rated voltage

V

DC900

DC1800(2000)

Rated insulation voltage

V

DC1800

DC3000

Rated insulation level

Between poles, to ground

isolation fracture

Between poles, to ground

isolation fracture

Power frequency withstand voltage

kV

6.9

8.3

9.2

11

Impulse withstand voltage

15

18

20

24

auxiliary control circuit power frequency withstand voltage

kV

2

Rated (operating) current

A

4000, 2500, 1250

Rated short-circuit making and breaking capacity

WLDS1-4000

kA

90/100ms(rated short-circuit closing capacity 128kA)

QDS8-1250

30/15ms

Rated short-time withstand current of main bus (0.25s)

kA

125/178(peak)

main circuit (0.25s)

kA

125/178(peak)

protective conductor (0.25s)

kA

50/71(peak)

protection level

Instrument room IP4X, enclosure IP3X

DC fast circuit breaker model

WLDS1-4000, QDS8-1250

DC isolating switch model

WLDG2-4000, WLDG2-2000

Auxiliary supply voltage

V

DC220, DC110, DC24, AC220

standard dimensions (W×D×H)

mm

600(800)× 1400(1500, 1600)× 2200

Product Details

ꄴThe previous one： 3, WDQX intelligent touch net feed (longitudinal) remote control device
ꄲThe latter one： 1. ZQA Rectifier Cabinet

Products

Pre-assembled DC traction solution for surface mining transportation

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