KYN61-40.5 Metal-Enclosed Drawout Switchgear is designed for three-phase AC 50 Hz power systems with a rated voltage of 40.5 kV and a single-busbar configuration.

As a high-voltage withdrawable switchgear, it is widely used in power plants, substations, industrial and mining enterprises and other power systems for power receiving, distribution, control, protection and monitoring. It is especially suitable for applications requiring frequent operation.

Equipped with ZN85-40.5 or LN2-40.5 withdrawable circuit breakers, the switchgear offers strong breaking capacity, long electrical and mechanical endurance, maintenance-free operation and long maintenance cycles. It complies with IEC 60298, GB/T 3906-2020, DL/T 404-2007 and other relevant standards.

Used in power systems such as power plants, substations, industrial and mining enterprises, serving as  key equipment for control, protection, and monitoring. It is particularly suitable for applications requiring frequent operation.

Compact structure: The frame is made of bent thin steel plates and assembled with high-strength bolts and nuts, offering high strength and light weight. Composite insulaiton and optimized electrode design make the cabinet compact and space-saving.

Good suitability: Designed for harsh operating conditions, the product is suitable for Class II pollution areas. The cable connection height reaches 870 mm for easy wiring, and flexible schemes meet various distribution system requirements.

Stable performance: Reliable mechanical five-prevention interlocks are provided between the circuit breaker, earthing switch and cabinet door. The circuit breaker offers stable breaking performance, long service life and easy maintenance. 

Safe and stable: Reliable mechanical five-prevention interlocks are provided between the circuit breaker, earthing switch and cabinet door. The circuit breaker offers stable breaking performance, long service life and easy maintenance.

Intelligentizing: The intelligent control and protection device supports distribution automation and intelligent O&M, helping prevent faults, reduce maintenance time and enable data sharing.

High protection level: The cabinet surface is powder-coated for corrosion resistance, oxidation resistance and a clean appearance. The enclosure protection rating reaches IP4X.

Name			Unit	Parameter
Rated voltage			kV	40.5
Rated frequency			Hz	50
Rated current			A	30-2000
Rated current of main bus			A	630, 1250, 1600, 2000
Rated peak withstand current			kA	50, 63, 80
Rated short-term withstand current			kA	20, 25, 31.5
Rated short circuit duration			s	4
Rated short-circuit breaking current			kA	20, 25, 31.5
Rated short-circuit closing current			kA	50, 63, 80
Out-of-phase ground fault breaking (rated breaking current)			%	86.7
Rated short circuit breaking times			time	30, 20
Rated mechanical life	Vacuum circuit breaker		time	10000/6000 [3000 (1600A)]
	SF6 grounding switch			3000
Rated insulation level	1min power frequency withstand voltage	Alternately and oppositely	kV	95
		Vacuum fracture		95
		Isolation fracture		118
	Lightning impulse withstand voltage	Alternate with		185/185/215
		Isolation fracture
Auxiliary control loop		Rated voltage	V	-110, -220/ -110, -220
		1min		2000
Rated operating sequence		20, 25, 31.5kA automatic reclosing	/	O-0.3s-CO-180s-CO
Protection level (enclosure/compartment)			/	IP4X/ IP2X
Pollution grade			/	Ⅱ级
Cabinet size (width * depth * height)			mm	1400*2800*2600