ZF-252 Gas Insulated Metal-Enclosed Switchgear (hereinafter referred as GIS) is applicable for the electrical system with features of three phases AC, 50Hz, and rated voltage of 252KV.
The GIS meets the relative requirements of national standard - GB7674-2008 and international standard IEC60517-1990.
All the components inside the GIS conform to the corresponding national standard.
ZF -252 SF6 gas insulated metal enclosed switchgear (simplified) GIS, used for three-phase AC 50Hz, 220kV power systems. The product adopts a common phase three position isolation grounding switch structure and modular design. It can meet various wiring methods.
Mainly used in power plants, substations, and large industrial and mining enterprises. Change to loss Open and close no-load, load and fault current, loadconversion, and isolation line of the electrical system Road, grounding protection, and measurement of electricity consumption, etc.
■Installation site: Indoor/outdoor
■Ambient temperature: -15~+40℃(indoor) / -35~+40℃(outdoor)
■Altitude: 1000m (No limitation for special order)
■Humidity: Daily Avg. ≤ 95%, Monthly Avg. ≤ 90%
■Wind speed: ≤ 35m/s (wind pressure ≤ 700PA)
■Sunshine intensity: 0.1W/cm² (at wind velocity of 0.5m/s)
■Seismic intensity: Horiz. ≤ 0.4G, Vert. ≤ 0.2g
■Creepage distance: 25mm/kV (class III), 31mm/kV (class IV)
■Keep away from combustible, explosive, corrosive materials and violent vibrations.
1Spring mechanism/motor mechanism
Adopted to avoid oil and gas to realize simple construction, easy maintenance and reliable operation.
2Aluminium alloy enclosure
Ensures light weight, low temperature-rise and strong anticorrosion.
3Double sealing systems
Adopted to guarantee high reliability in gas tightness and ensure minimum annual gas leakage.
4Integrated delivery
GIS will be delivered as a whole without dismantle to reduce site installation and maintenance works.
5Safety & Rupture disc
Rupture disc installed on every gas compartment to avoid explosion in over-pressure state. Activating pressure: 1±0.06MPa (breaker), 0.7±0.04MPa (others). Destructive pressure withstand: 2.3MPa (breaker), 1.6MPa (others).
6Good insulating ability
Insulating barrier manufactured on production lines imported from Hubers Company, Germany. Process from filling mixture to molding is finished in totally sealed, temperature-controlled workshop to avoid air bubbles. Tested with X-ray, mechanical, power frequency withstand, and partial discharge tests.
7Good conducting ability
Aluminum alloy conductors are coated with silver up to 24μm to reduce resistance as small as possible.
8High current carrying performance
Copper with silver coat of strong adhesiveness is applied to ensure good current carrying performance and guarantee a long-term service.
9View window
View windows are installed on GIS main components to observe service state inside GIS.
10Horizontal circuit breaker
The circuit breaker is arranged horizontally, and the arc extinguishing chamber adopts a single break double action structure. The self-energy arc extinguishing principle is equipped with a low-power spring operating mechanism, which effectively reduces mechanical stress, has high reliability, and has a mechanical life of 10,000 times.
11Three-position isolation grounding switch
Adopting a three-position isolation grounding switch structure. Mechanical interlocking between isolation and grounding effectively avoids misoperation, with high reliability and a mechanical lifespan of 10,000 times.
12Three-phase common box structure
The three-station isolation grounding switch and main busbar adopt a three-phase common box structure. The reduction of SF6 gas sealing and bonding surfaces reduces the probability of gas leakage. Simple structure with excellent corrosion resistance due to the absence of complex external connecting rods and fittings.
13Low rated SF6 gas pressure
Except for circuit breakers, all other gas chambers have a rated gas pressure of 0.4MPa, greatly reducing the amount of SF6 gas used and mitigating the greenhouse effect.
Zeno Electric
