KYN28-24 Armored Removable AC Metal-enclosed Switchgear

 

Jinneng electric KYN28-24 Armored removable AC metal-enclosed switchgear is a three-phase, AC 50Hz, indoor switchgear assembly with a rated voltage of 24kV.Designed for power reception and distribution in power plants, substations, and industrial enterprises, it provides control, protection, and monitoring functions for electrical circuits.

 

It is a type of medium-voltage (MV) distribution equipment widely used in 6kV, 10kV, and 35kV power systems. It features metal-enclosed construction, armored compartments, and a withdrawable circuit breaker, making it suitable for power distribution, control, and protection in electrical networks

 

 

 

 

Component	Function
Circuit Breaker Trolley	Withdrawable vacuum or SF₆ circuit breaker for switching and short-circuit protection.
Busbar Chamber	Houses main busbars (copper or aluminum) for inter-panel connections.
Cable Chamber	Connects incoming/outgoing cables, often equipped with CTs, PTs, and surge arresters.
Relay Compartment	Accommodates protection relays, meters, and control devices.
Earthing Switch	Ensures safe grounding during maintenance.
Pressure Relief Vent	Releases arc-generated gases during internal faults to prevent explosion.

 

 

Item		Unit	Data
Rated voltage		kV	24
Rated frequency of circuit breaker		Hz	50/60
Rated insulation level	Lightning impulse withstand voltage (peak)	kV	Phase-to-phase, phase-to-ground	60	Isolating fracture		79
	1min power frequency withstandvoltage (effective value)	kV	Phase-to-phase, phase-to-ground	125	Isolating fracture		145
	Auxiliary control circuit power frequency withstand voltage	V	2000
Rated current of circuit breaker		A	630, 1250, 1600 2000, 2500, 3150
Rated short-circuit breaking current		kA	20			31.5
Rated short-circuit closing current (peak)		kA	50			80
Rated short-time withstand current		kA	20			31.5
Rated peak withstand current		kA	50			80
Auxiliary control circuit rated voltage		V	AC or DC 110/220
Protection level		/	IP4X(IP2X when the front door is opened)
Overall and mounting dimensions(mm) s(width*depth*height)		mm	800 × 1810 ×2380			1000 × 1810 ×2380
Weight		kg	840~1140

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● Simple and effective "five-prevention" interlocking to prevent misoperation

● Compatible with vacuum circuit breakers such as VSI, VW1, VD4, and 3AH

● Can be equipped with voltage transformer unit, isolation unit, fuse unit, etc., with interchangeability for unit of the same purpose

● Reliable cabinet installation and front-side maintenance, reducing floor space

● Heating elements can be added to the circuit breaker and cable compartments to prevent condensation and corrosion

● Spacious cable compartment for connecting multiple cables

● Enclosure protection rating of IP4X, with IP2X protection when the circuit breaker compartment door is open or between compartments

● Materials can be selected from galvanized steel sheets or aluminum-clad steel sheets

 

 

• Ambient Air Temperature:

     Upper Limit: +40°C

     Lower Limit: -10°C

• Altitude: ≤1000m
• Relative Humidity:

     Daily Average: ≤95%

     Monthly Average: ≤90%

• Water Vapor Pressure:

     Average Value: ≤2.2 kPa

     Monthly Average Value: ≤1.8 kPa

• Safety Conditions:

     No fire or explosion hazards.

     No severe pollution that could corrode metals or insulation.

     No severe vibrations, turbulence, or vertical inclinations exceeding 8°.

 

 

● Substation MV distribution: Incoming/outgoing feeder, bus coupler, and PT panels.

● Industrial power systems: Mining, petrochemical, and metallurgical plants.

● Renewable energy: PV/wind farm step-up substations.

● Rail transit: Metro and high-speed rail traction power supply.

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