KYN28A-12 Metal Armored Removable Switch Cabinet

•Cabinet structure

•Five prevention functions

•Handcart design

•Compartment design

•Intelligent functions

Product Introduction

KYN28A-12 metal armored withdrawable switchgear is an indoor complete distribution device suitable for 3.6-12kV, three-phase AC 50Hz single busbar and single busbar segmented systems. It is mainly used to receive and distribute electrical energy, and to control, protect, and monitor circuits.

Application

: Power system

: Industrial building

: Transformer substation

: Power plant

: Cabinet structure
Made of high-quality aluminum zinc coated steel plate, processed by precision CNC machine tools, it has high strength, corrosion resistance, and oxidation resistance. The overall structure is compact and the appearance is beautiful.

: Five prevention functions
Equipped with comprehensive anti misoperation functions, including preventing accidental opening and closing of circuit breakers, preventing pushing and pulling of circuit breaker handcarts under load, preventing live closing of grounding switches, preventing the grounding switch from closing the circuit breaker when in the closed position, and preventing accidental entry into live compartments.

: Handcart design
The handcart is insulated and coordinated with the cabinet, allowing for flexible operation and enabling switching between disconnection, testing, and working positions. There are various types of handcarts, including circuit breaker handcarts, voltage transformer handcarts, isolation handcarts, etc.

: Intelligent functions
Configurable intelligent measurement and control protection device, supporting online temperature measurement, remote control operation of grounding switch, electric rocking in and out handcart and other functions.

Parameter

Item		Unit	Equipped with VS1, VD4, VK vacuum circuit breakers
Rated voltage		KV	12
Rated insulation level	Lightning impulse withstand voltage (full wave)		(Phase to phase, relative to ground) 75, (fracture) 85
	1mim power frequency withstand voltage		(Phase to phase, relative to ground) 75, (fracture) 85
Rated frequency		Hz	50
Rated current		A	630、1250、1600、2000
Rated short-circuit breaking current		KA	16、20、25、31.5、40	45、50
4S rated short-time withstand current			16、20、25、31.5、40	45、50
Rated short-circuit photosynthetic current			40、50、63、80、100	100、125
Rated thermal stability current of main busbar			40、50、63、80、100	100、125
Rated operating sequence			0-0.3s-C0-180s-C0 (40 and 50KA are 0-180s-C0-180s-C0)
Rated thermal stability current of main busbar		KA	25、31.5	40、50
Interphase center distance		mm	210(150、165)	230（275）
Rated short-circuit current breaking times		time	≥50	≥50
Rated short-circuit current breaking times		time	≥20000
Mechanical lifespan of vacuum circuit breaker		time	2000
Rated operating voltage of opening and closing coils		V	DC220/110V、AC220/110V
Rated power of opening and closing coils		W	VD4/250、VS1/300、VK、VB/385
Rated operating voltage of energy storage motor		V	DC220/110
Rated power of energy storage motor		W	VD4/250、VS1/100、VK、VB/40
Energy storage time		S	≤10
Shell protection level			IP4X

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