XGN2 type High voltage switch cabinet It is a box type fixed enclosed equipment (switch cabinet for short), which is used for receiving and distributing electric energy in the 3, 6, 10KV three-phase AC 50HZ system of industrial, mining, and enterprise power transformation and distribution stations. It is especially suitable for occasions with frequent operation. Its basic skeleton is Angle steel It is welded.
The switchgear meets the requirements of the national standard GB 3906-1991 "3~35KV AC Metal Enclosed Switchgear", and has the "five prevention" locking function proposed by two departments.
The main switch of this switch cabinet adopts vacuum contactor or ZN28A-10 (12) series vacuum circuit breaker, CD series electromagnetic and CT series Spring Operating mechanism. The disconnector adopts GN □ - 10 high current disconnector series products.
Environmental conditions for product use
1. Ambient temperature: upper limit 40 ℃; Lower limit - 25 ℃; 2. The altitude shall not exceed 1000m;
3. Relative humidity: the daily average value is not more than 95%, and the monthly average value is not more than 90%; 4. Water vapor pressure: daily average value is not more than 2.2 × 10 ‾ ³ Mpa, the monthly average value is not more than 90% 5, and the seismic cracking degree is not more than 8 degrees;
6. Places without fire, explosion danger, serious pollution, chemical corrosion and severe vibration.
III. Technical Data
control electric machinery Power Supply The frequency is 50HZ, the rated voltage is 3~10kV, and the rated current of the stator is 2000A. For motors of different specifications, the parameters of the main circuit, control circuit and electrical components shall be determined according to the motor technical data. It can control and start the motor together with liquid resistance starter, reactor, frequency sensitive rheostat, etc.
The switchgear is equipped with overcurrent, quick break, undervoltage, grounding and other protection devices.
structure
The switch cabinet is a fixed closed metal box structure, and the cabinet frame is welded by angle steel. The cabinet is divided into high-voltage room and relay room. The rooms are separated by steel plates.
The upper part of the switch cabinet is the isolating switch, and the transmission of the vacuum circuit breaker is connected with the operating mechanism by the pull rod. The lower wiring terminal of the circuit breaker is connected with the current transformer, and the upper wiring terminal of the circuit breaker is connected with the wiring terminal of the disconnector. The circuit breaker room is equipped with a pressure release channel. If the internal arc occurs, the gas can release the pressure through the exhaust channel.
The operating mechanism of the circuit breaker is installed on the left side of the front, above which is the operating and interlocking mechanism of the disconnector. The bottom of the switchgear is a zero sequence current transformer to protect the grounding fault
