■ Normal Service Conditions
1、Ambient Temperature: Upper limit +45℃, lower limit -35℃; (Storage and transportation allowed at -45℃);
2、Altitude: Not exceeding 1000m;
3、Relative Humidity: Daily average below 95%, monthly average below 90%;
4、Seismic Intensity: Not exceeding Grade 8;
5、Location Requirements: No fire, no explosion hazard, no severe pollution, no chemically corrosive gases, and no intense vibration.
Note: Any conditions beyond the above requirements shall be determined through negotiation between the user and the manufacturer. For special locations with adverse operating environments (such as underground substations), dehumidification equipment shall be added indoors to improve the product's operating conditions and ensure the safe and reliable operation of the equipment.
■ Technical Parameters

No.	Item		Unit	Parameter
1	Rated Voltage		kV	12
2	Insulation Level	1-Minute Power Frequency Withstand Voltage (Phase-to-Ground, Phase-to-Phase / Across Breaks)	kV	42/48
		Lightning Impulse Withstand Voltage (Phase-to-Ground, Phase-to-Phase / Across Breaks)	kV	75/85
3	Rated Frequency		Hz	50
4	Rated Current of Main Busbar		A	630、1250、1600、2000、2500、3150、4000
5	Rated Short-Time Withstand Current (4s)		kA	25、31.5、40、50
6	Rated Peak Withstand Current		kA	40、50、63、80、100、125
7	Creepage Distance Ratio		mm/kV	20
8	Ingress Protection Rating (IP Rating)			IP4X
9	Weight		kg	≥800

■ Technical Key Points
● The cabinet body is fabricated by multi-fold assembly of aluminum-zinc coated steel plates, eliminating errors caused by welding and ensuring high precision in cabinet processing and assembly.
● The switchgear can be equipped with circuit breakers with electric chassis trucks and electric earthing switches to achieve programmed operation.
● D-type or O-type busbars and epoxy resin vulcanization technology are adopted to realize full insulation, optimize the electric field distribution inside the cabinet, and enhance the overall insulation level of the switchgear.
● It has passed the 0.5-second internal fault arc test and possesses the ability to withstand fault arc effects.
● It is equipped with functions such as automatic thermal convection ventilation and heat dissipation for temperature and humidity control, as well as internal fault explosion protection. A universal mechanical interlocking device is adopted, ensuring high reliability and maintenance-free operation.
■ Outline Structure Diagram