KYN28A-12 Armored Removable AC Metal Switchgear

Product Overview

The cabinet body is made of high-quality aluminum-zinc clad plate bolted together after multiple bending. The main switch in the cabinet can be equipped with VD4, VM1, HD4, VEP, ZN63A (VS1), ZN63 (VS1 +), ZN63M (VSm), F-c and other composite insulated mid-mounted truck-type vacuum and sulfur hexafluoride circuit breakers. The operating mechanism of the circuit breaker can be spring or permanent magnet. It can also be equipped with V7 and V12 mid-mounted truck-type vacuum contactors. Switchgear is suitable for power plants, substations, industrial and mining enterprises and institutions and other power transformation and distribution applications.

Product Characteristics

• All chambers are completely metal-armored and completely separated.
• The operation of all equipment is conducted when the cabinet door is closed.
• The cabinet shell has good sealing performance to prevent the equipment from being invaded by sundries and insect pests.
• It is very simple to replace the circuit breaker, and the switch has good interchangeability.
• The cabinet body can be installed against the wall, and can be maintained close to the cabinet to reduce floor area.
• There is ample space in the cable chamber, which can connect multiple cables.
• It is easy to observe the installation in the cable chamber through the panel door.

Conditions for use

Item		Unit	Parameter
Rated frequency		Hz	50
Rated voltage		kV	3.6, 7.2, 12
Max. working voltage		kV	Interphase, phase to ground	Isolated fracture
Rated insulation level	Power frequency withstand voltage @ 1 min	kV	42
	Lightning impulse withstand voltage		75
Rated current of main bus		A	630 – 3150
Rated current of branch bus		A	630 – 3150
Rated 4s thermal stable current (effective value)		kA	20, 25, 31.5, 40
Rated 4s thermal stable current (peak)		kA	50, 63, 80, 100
Protection grade	Housing		IP4X
	When the circuit breaker chamber door is opened		IP2X
Overall dimensions (width × depth × height)	F-c circuit	mm	800×1500×2300(Below 40kA)
	Rated current ＜ 1,600A
	Rated current ＞ 1,600A		1000×1500×2300

Note: Switch cabinets with cabinet depth of 1,660mm are used for overhead scheme.