DC disconnectors (isolators) provide the visible, lockable isolation points a metro traction power system depends on: they de-energise catenary sections, feeders, depot tracks and stabling roads so maintenance crews can work safely and faults can be contained. A disconnector does not interrupt load current - its job is to give an unambiguous, standard-compliant visible break once the circuit is de-energised, and to do it reliably over decades of daily switching.
Henan Chuangwit ZGW1 series metro DC disconnectors are outdoor units rated DC 1500 V, manufactured and tested to IEC 61992-3 (railway applications - fixed installations - DC switchgear - Part 3: DC disconnectors, load disconnectors and earthing switches) together with metro DC traction supply technical requirements. The series covers two ratings: 3150 A for standard section and feeder isolation duties, and a 6000 A high-capacity unit whose strong current-carrying capability serves heavily loaded metro supply systems.
Product Groups
- ZGW1-1.5/3150 - DC 1500 V, 3150 A outdoor disconnector for electrical isolation of metro OCS sections; dependable switching and simple maintenance.
- ZGW1-1.5/6000 - DC 1500 V, 6000 A high-capacity outdoor disconnector for large-current metro DC supply systems.
Selection Guide
Rated current. Size the disconnector to the maximum continuous current of the section it isolates, with margin for short-time overloads. The 6000 A unit is the choice for high-capacity feeders and heavily loaded mainline sections; 3150 A covers most depot and stabling duties.
Operation. Manual operation with lockable handles suits accessible, locally switched locations; motorised operation supports remote switching from the operations control centre. Confirm auxiliary contact requirements for switch status indication in your SCADA scheme.
Installation. Outdoor enclosures suit open-air, depot and elevated installations. Match mounting arrangements, clearances and busbar or tail connections to your substation and OCS drawings before ordering - we confirm interface dimensions with each quotation.
Standards & Compliance
IEC 61992-3 "Railway applications - Fixed installations - DC switchgear - Part 3: DC disconnectors, load disconnectors and earthing switches"; metro DC traction power supply system technical requirements. Send us your system voltage, rated current and installation position for a datasheet and quotation.
