Product Introduction：

Hxgn-12 AC metal enclosed switching equipment type box (fixed) AC metal enclosed ring network switching equipment, is 6 ~ 10kV three-phase AC 50Hz loop network power supply and terminal power supply system of the complete set of indoor distribution equipment. It is mainly applicable to power distribution places such as factories and mines, residential quarters, high-rise buildings, schools, etc., and is used for receiving and public power distribution energy.

This loop cabinet can meet the requirements of a single 1250kVA transformer and the following small and medium-sized substation (distribution room). Fuse for transformer over-current, short circuit protection, such as minimum in 2.5 3 min is action, * * can be 31.5 kA fault current, fuse with the impactor can make the load switch trip, advanced load switch arc extinguishing device, can open circuit transfer of load current and electric current, so HXGN type can be used as the switch of power distribution system equipment completely, and the load switch cabinet has small volume, easy to operate, without operating current and the device characteristics, more engineering design provided economic applicable selection scheme.
The ring network cabinet meets the requirements of national standard GB3906 "3 ~ 35kV AC Metal Closed Switch Equipment" and international standard IEC "ac metal closed switch Equipment and control equipment under 1kV and 52kV", and has the "five prevention" locking function proposed in two parts.
The shell of the cabinet is made of high quality cold-rolled steel plate and imported aluminum-zinc coated steel plate, which is assembled and overlapped or welded.
The shell of the cabinet and the baffles of each functional unit are composed of cold-rolled steel plates, which are galvanized or sprayed with plastic on the surface, and the protection grade reaches IP3X.
 
Normal service environment：

21. 1、Environment temperature：**40℃，**-25℃；
21. 2、Altitude: not more than 1000m;
21. 3、Pollution level does not exceed level II in GB/T5582;
21. 4、The installation site shall be free from explosion, fire, chemical corrosion and violent vibration.
21. 5、Humidity: the average daily relative humidity shall not be greater than 95%, and the average monthly relative humidity shall not be greater than 90%;
21. 6、Earthquake: intensity does not exceed 8 degrees;
21. 7、When the switch cabinet is used beyond the normal working environment, we can negotiate with the company to modify the manufacturing technical conditions.

 
Technical parameters：

Project	Unit	Parameter
Nominal voltage	kV	12
Nominal  frequency	Hz	50
Rated power-frequency withstand voltage 1min	kV	42
Rated lightning impulse withstand voltage（1.2/50us）	kV	75
Bus rated current	A	630
Rated short-time withstand current（2S）	kA	20
Rated peak withstand current	kA	50
Rated short-circuit closing current of the main circuit	kA	50
Rated fuses short circuit switching current	kA	31.5
mechanical life	second-rate	2000
Protection grade		IP3X

Ordering instruction:

21. The primary system diagram shall include the following data: switching capacity, rated voltage and rated current of the incoming power supply; Rated current of each outlet circuit; Models and specifications of main components.
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21. Switch cabinet arrangement drawing and plane layout dimension drawing.
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21. The secondary schematic diagram, including the operation, signal, rated voltage of the protection circuit and specifications and models of each electrical component.
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21. Small bus layout
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21. When bus bridge is needed, the span and height dimensions and opening dimensions shall be provided by the user.
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21. Spare parts quantity
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21. When customers have special requirements, they can negotiate with the manufacturer when ordering.
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