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(I) Product overview:

KYN44A-12 (Z) type metal armored removable switchgear (switchgear) is a new product developed by Chengdu Mellon Electric Co., Ltd. on the basis of KYN28-12 and absorbing advanced manufacturing technology at home and abroad. The appearance and size are the same as the KYN28-12.

(II) Technical parameters

Rated voltage kV	12
Rated frequency Hz	50(60)
Rated short-time power frequency withstand voltage (phase-to-phase, ground) kV	42
Rated lightning impulse withstand voltage (phase-to-ground) kV	75
Rated short-circuit breaking current (max.) kA	25~50
Rated short-circuit closing current (max.) kA	63~125
4S rated short-time withstand current (kA)	25~50
Rated peak withstand current (kA)	63~125
Rated busbar current (max.) A	630~4000A
Degree of protection (standard)	IP4X
Note: When the rated current is 4000A, forced air cooling is required.

(iii) Technical advantages of KYN44A-12(Z)

Shape size (width × depth × height) mm	650(800)× 1500 × 2300 (below 1250A)
	1000 × 1500 × 2300 (below 4000A)
	800(1000)× 1660 × 2300 rear overhead

Through full type test, in line with IEC2771, GB3906, DL404 and many other domestic and international standards and norms

Modular structure, each compartment has an independent pressure release channel (high pressure chamber, bus bar chamber, cable chamber and low pressure chamber can be replaced separately)

The steel plate between each compartment can withstand the gas pressure generated by internal arc fault, and the internal arc of the switch cabinet meets IAC A FLR standard

All operations must be carried out with the high-pressure chamber door closed. The high-pressure chamber door is equipped with a reliable interlocking mechanism.

Reliable "five-proof" mechanical interlocking mechanism

Separate high altitude type tests at an altitude of 3000m.

Through the complete seismic test

(IV) Application Areas

KYN44A-12 (Z) type metal armored removable switchgear (switchgear) is used in substations and power distribution systems, mainly for 7.2-12kV primary power distribution systems.

Petroleum, chemical, metallurgy, machinery, textile, pharmaceutical industry

Rail transit, water supply and sewage treatment works

power supply company

High-rise buildings, commercial buildings, hospitals, scientific research institutions

Key words: Malone, electrical

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