12/24kV Medium-voltage Metal-clad Switchgear, KYN28A

12/24kV medium-voltage switchgear is indoor metal-clad switchgear used to receive and distribute 3-phase AC 50Hz electric power with rated voltage of 12/24kV, and can provide control and protection of circuits. Various microprocessor-based relay protection units can be installed to achieve intelligent control, integrating functions of remote controlling, remote measuring, remote signaling and remote regulating. This medium-voltage switchgear can be configured with different types of vacuum circuits breakers or vacuum contactors.

Standard IEC 62271-1: High-voltage switchgear and controlgear - Part 1: Common specifications IEC 62271-100: High-voltage switchgear and controlgear – Part 100: Alternating-current circuit-breakers IEC 62271-102: High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches IEC 62271-200: High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV Features Switchgear enclosure and partitioning panels are made of high quality aluminum-zinc coated steel sheets; Protection level IP4X for the enclosure, and IP2X the partition between compartments; The switchgear can be wall-standing installed to save floor space, or free-standing installed to make it accessible from two sides; Correct operation performance is guaranteed by safety interlocks, providing high level of reliability; Main busbar system connected from one switchgear to another is fixed by utilizing branch connections and fixed contactors. Cable compartment can be equipped with current transformer, earthing switch, surge arrester and cable; Removable aluminum plate at bottom for cable entry; Low-voltage compartment can be configured with various relays, instruments, signal indicators, switches, etc.; Small busbar compartment can be added at the top of instrument compartment; Pressure relief units are mounted at the top of circuit breaker compartment, busbar compartment and cable compartment, protecting the safety of operator and switchgear; Technical Parameters

Item		Unit	Parameter
Rated voltages (V)		kV	12	24
Rated insulation voltage	1 min. power frequency withstand voltage	kV	42	65
	Rated impulse withstand voltage	kV	75	125
Rated frequency		Hz	50
Rated current		A	630, 1250, 1600, 2000, 2500, 3150
4s short-time withstand current		kA	25, 31.5.40 ,50
Peak withstand current		kV	63,80, 100,125
Degree of protection			External IP4X, Internal IP2X

Dimensions

Width	Rated current 1250 or below	800/650mm
	Rated current 1600 or above	1000mm
Depth	Cable lower incoming & outgoing	1500mm
	Cable up incoming & outgoing	1660mm
Height		2300/2240mm