HV gas-insulated metal-enclosed switchgear(GIS) for Substation-252kV

ZF29-252 gas insulated switchgear (GIS) is designed for three-phase AC 50Hz, 220kV power systems. It features a three-phase common enclosure with a three-position isolating earthing switch and modular design to accommodate various connection schemes. Applications include power plants, substations, and large industrial facilities, capable of making and breaking load and fault currents, load transfer, circuit isolation, earthing, and metering.

Features

• The circuit breaker adopts a horizontal arrangement with a single-break double-motion interrupter unit using the self-blast interruption principle, driven by a low-energy spring mechanism with a mechanical endurance of 10 000 operations.
• Three-position disconnecting earthing switch with mechanical interlocking between disconnecting and earthing functions, preventing misoperation with a proven mechanical endurance of 10 000 operations.
• Three-position disconnecting earthing switch and main busbar employ a three-phase common enclosure structure, minimizing the number of SF6 gas seals to reduce gas leakage risk. No complex external linkages, resulting in a simple, corrosion-resistant design.
• Low rated SF6 gas pressure — the circuit breaker gas chamber operates at 0.60MPa while other gas chambers operate at 0.40MPa, significantly reducing SF6 consumption and environmental impact.

Technical parameters

Product Show

Industry applications

It is mainly used in power plants, substations, and large industrial and mining enterprises. Divide and combine no-load, load and fault currents, conversion loads, isolation lines, grounding protection and measurement of power transmission and transformation systems.