HV Gas insulation switchgear (GIS) for Large Substations-252kV

Type-tested and certified by KEMA, this GIS delivers exceptional technical precision. Its low partial discharge performance—≤3pC for complete bays and ≤2pC for individual insulators—ensures stable, long-term operation critical for high-voltage grids. The circuit breaker, equipped with an advanced operating mechanism, achieves 10,000 mechanical operations and meets C2/E2/M2 class requirements, guaranteeing long-term reliability with minimal maintenance.

Structurally optimized with a modular design, RHG-252 accommodates diverse substation layouts through flexible configuration options. The double-seal ring system on butt-flange surfaces reduces annual gas leakage to ≤0.1%, enhancing airtightness and reducing maintenance needs. The compact footprint—with a standard bay width of 2m and a minimum of 1.8m—saves valuable space, a critical advantage in land-constrained areas.

Engineered for harsh conditions, it performs reliably in extreme temperatures (-30°C to 50°C), high humidity, salt fog, coastal environments, and high altitudes (up to 4,000m). Insulation design follows IEC 62271-1 altitude correction requirements, ensuring dependable operation in challenging climates.

With core components manufactured in-house, Chint ensures consistent quality and short lead times. Each unit undergoes factory pre-testing including lightning impulse withstand tests, eliminating insulation defects before delivery. RHG-252 delivers an optimal balance of efficiency, durability, and adaptability, making it a trusted choice for modern high-voltage power infrastructure.