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HXGN17-12 AC metal ring main switchgear (referred to as ring main unit) is a new type of high-voltage switchgear produced for the needs of urban power grid renovation and construction.
In the power supply system, it is also used for breaking load current, short-circuit current, and closing short-circuit current. This ring main unit is equipped with FN12 and FZRN21 vacuum load switches, and the operating mechanism is a spring mechanism, which can be operated manually or electrically.
The grounding switch and isolation knife are equipped with a manual operating mechanism. This ring main unit has strong completeness, small size, no combustion and explosion hazards, and reliable “five prevention” functions. This ring main unit complies with the relevant provisions of GB3906 “3-35kV AC Gold Group Enclosed Switchgear” 1EC60420 “High Voltage AC Load Switch Fuse Combination Apparatus” standard.
Usage conditions
1.Environmental temperature: upper limit+40 ℃, lower limit -15 ℃
2.Altitude: not exceeding 1000m; Any place with an altitude exceeding 1000m shall be handled in accordance with JB/Z102-72 “Technical Requirements for High Voltage Electrical Appliances Used in High Altitude Areas”.
3.Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%
4.Water vapor pressure: daily average not exceeding 2.2Kpa, monthly average not exceeding 1.8Kpa
5.Seismic intensity: not exceeding 8 degrees
6.Usage: No fire, explosion hazard, serious pollution, chemical corrosion, severe vibration, etc
Product Features
This switchgear is a metal enclosed box structure, and the cabinet body is made of cold-rolled steel plates and angle steel welded together.
The color of the cabinet body is specified by the user. Made of useless mesh textiles and non refractory materials.
The external insulation creepage distance of each component and supporting insulation in the high-voltage switchgear is ≥ 1.8cm/kV for pure ceramic insulation and ≥ 2.0cm/kV for organic insulation.
The air distance between phases and relative ground inside the cabinet is ≥ 125mm. There is an intelligent temperature and humidity controller installed inside the cabinet, which can start and stop the heater at any time according to the temperature and humidity inside the circuit breaker room and cable room to prevent condensation or high temperature.
The front of the switchgear is equipped with an observation window, which allows you to observe the on/off positions of the upper and lower isolation switches and circuit breakers without opening the cabinet door.
