24kV Armored Removable Metal-Enclosed Switchgear

The KYN28A-24 24kV Armored Removable Metal-Enclosed Switchgear is a distribution equipment meticulously designed for indoor three-phase AC 50Hz power systems with a rated voltage of 24kV. It is primarily utilized in power plants, substations, industrial and mining enterprises, and high-rise buildings for the reception and distribution of electrical energy, while also providing functions for circuit control, protection, and monitoring.

Get A Quote

PREV：Indoor Metal-Armored Centrally Mounted Removable Switchgear NEXT：40.5kV Armored Removable AC Metal-Enclosed Switchgear

Description
Parameter

This switchgear features an assembled structure, securely connected by high-strength bolts and rivet nuts. To ensure operational safety, the main switch, handcart, and grounding switch are integrated with a mandatory mechanical interlocking mechanism, providing a comprehensive "five-prevention" interlocking function. The equipment is fitted with high-performance VS1 series centrally mounted high-voltage AC vacuum circuit breakers and sealed vacuum circuit breakers for reliable interruption and closing operations.

In terms of electrical design, the KYN28A-24's secondary circuit is equipped with advanced and reliable control and protection components. The busbars are insulated using heat-shrinkable materials or epoxy-coated insulation methods, incorporating an optimized electrode shape. This design contributes to the switchgear being technologically advanced, stable, structurally rational, user-friendly, and both safe and reliable as a power distribution device.
The product's key technical parameters include a rated voltage of 24kV and a rated frequency of 50/60Hz. Its rated insulation level features a 1-minute power frequency withstand voltage (effective value) of 65kV phase-to-phase and relative-to-ground, and 79kV at the isolation break; lightning impulse withstand voltage (peak value) is 125kV, and 145kV at the isolation break; the auxiliary control circuit has a 1-minute power frequency withstand voltage of 2000V. The rated current range is comprehensive, including 630A, 1250A, 1600A, 2000A, 2500A, and 3150A. The rated short-time withstand current (4s) is 20kA, 25kA, or 31.5kA, and the rated peak withstand current is 50kA, 63kA, or 80kA. The auxiliary circuit rated voltage is DC or AC 110/220V.

The enclosure protection level is IP4X, reducing to IP2X when the circuit breaker door is open or between compartments. Its dimensions (width × depth × height) are 1000×1810×2430mm, with a weight ranging from 840kg to 1440kg. Internally, the switchgear is divided into key compartments including the busbar room, circuit breaker trolley room, cable room, and relay instrument room.

No.	Item		Unit	Parameter
1	Rated Voltage		kV	24
2	Rated Frequency		Hz	50/60
3	Rated insulation level	1min power frequency withstand voltage (effective value)	kV	Phase to phase, relative to ground	65		isolation break		79
		Lightning impulse withstand voltage (peak value)			125				145
		Auxiliary control circuit 1min power frequency withstand voltage	v	2000
4	Rated Current		A	630,1250,1600,2000,2500,3150
5	Rated Short-Time Withstand Current for Opening and Closing		kA	20		25		31.5
6	Rated Short-Time Combined Current (Peak Value)		kA	50		63		80
7	Rated Short-Time Withstand Current (4s)		kA	20		25		31.5
8	Rated Peak Withstand Current		kA	50		63		80
9	Mechanical Life of Closing and Opening Cycles		V	DC or AC 110/220
10	Enclosure Protection Level			IP4X (IP2X when the circuit breaker door is open or between compartments)
11	Dimensions (Width × Depth × Height)		mm	1000×1810×2430
12	Weight		kg	840-1440