KYN28A-12 High-Voltage Switchgear

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KYN28A-12 High-voltage Switchgear

KYN28A-12 is indoor metal-clad withdrawable switchgear for receiving and distributing power. Separate compartments and mechanical interlocks support operation and maintenance.

Typical Applications

Sites: Power plants, substations, industrial and mining facilities.

Systems: Three-phase single-busbar and sectionalized-busbar distribution.

Metal-clad Construction

Withdrawable Design

Mechanical Interlocks

Product Overview

Typical Challenges

Product Features

Combines a metal-clad cabinet with a center-mounted withdrawable truck.

Metal-clad Withdrawable Design

Independent compartments provide separation within the switchgear.

Separate Compartments

Supports overhead and cable incoming and outgoing arrangements.

Flexible Connections

Key insulating parts use epoxy resin for mechanical strength and corrosion resistance.

Epoxy-resin Insulation

CNC-processed components support interchangeability during assembly.

CNC-manufactured Components

Door and circuit-breaker compartment interlocks prevent incorrect operation.

Mechanical Interlocks

Specifications

Rated Current	Incoming/Outgoing Connections	Cabinet Dimensions (mm) W × D × H	Mounting Dimensions (mm) w × d × φ
≤1250 A	Standard entry/exit	800 × 1500 × 2320	500 × 1350 × M12
≤1250 A	Rear cable entry/exit	800 × 1650 × 2320	500 × 1350 × M12
≥1600 A	Standard entry/exit	1000 × 1500 × 2320	700 × 1350 × M12
≥1600 A	Rear cable entry/exit	1000 × 1650 × 2300	700 × 1350 × M12

Parameter	Test Point	Unit	Data
Rated Voltage		kV	6, 10
Maximum Operating Voltage		kV	7.2, 12
Rated Frequency		Hz	50
Rated Current		A	630, 1250, 1600, 2000, 2500, 3150, 4000
Rated Short-Circuit Breaking Current		kA	20, 25, 31.5, 40, 50
Rated Short-Circuit Making Current		kA	50, 63, 80, 100, 125
Peak Withstand Current		kA	50, 63, 80, 100, 125
4 s Short-Time Withstand Current (RMS)		kA	20, 25, 31.5, 40, 50
Rated Lightning Impulse Withstand Voltage	Phase-to-earth	kV	60, 75
	Across open contacts	kV	75, 85
1 min Power-Frequency Withstand Voltage	Phase-to-earth	kV	32, 42
	Across open contacts	kV	36, 48
Closing and Opening Voltage		V	AC 220, DC 110, DC 220

Data Download

Name	Version	format	Size	Date	Download
KYN28a-12-High-voltage Switchgear	V1.0	pdf	1.46MB	2026-11-11	Download Now

Success Stories

Inner Mongolia Jushi Energy

¥ 0.00

WISCO 46 MW Blast Furnace Blower LCI Upgrade Project

¥ 0.00

Longmen Steel 27 MW Blast Furnace Blower Variable-Frequency Soft-Starting Project

¥ 0.00

Aosen Steel 1,280 m³ Blast Furnace Blower Variable-Frequency Soft-Starting Project

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Jiangsu Binxin Special Steel 22 MW Blast Furnace Blower BPRT Variable-Frequency Soft-Starting Project

¥ 0.00

Hejin Hongda Special Steel 1,300 m³ Blast Furnace BPRT Variable-Frequency Soft-Starting Project

¥ 0.00

Research Test Vacuum Pump System High-Voltage VFD Speed Control Project

¥ 0.00

Shandong Tai'an 350MW Salt Cavern CAES LCI Variable Frequency Drive Project

The compression section of the 350MW salt cavern CAES project in Tai'an, Shandong consists of two trains, each equipped with four synchronous-motor-driven compressor units with motor ratings of 40MW, 33MW, 33MW and 33MW.

¥ 0.00

Gansu Yumen 300MW Compressed Air Energy Storage LCI Variable Frequency Drive Project

The 300MW CAES power station in Yumen, Jiuquan, Gansu adopts a man-made cavern gas storage scheme. The compression section consists of two trains, each equipped with three synchronous-motor-driven compressor units with motor ratings of 81MW, 72MW and 30MW respectively.

¥ 0.00

300 MW Compressed Air Energy Storage LCI Variable-Frequency Drive Project in Yingcheng, Hubei

The 300 MW compressed air energy storage project in Yingcheng, Hubei, utilizes an underground salt cavern as a gas storage facility. The compression section consists of two production lines, each equipped with four compressor units. The system must perform multiple, continuous, and sequential starts of the high-power compressor motors and regulate the speed of the final-stage compressors on each line.

¥ 0.00

Three Gorges Energy's 60 MW/240 MWh Compressed Air Energy Storage Variable-Frequency Drive Project

¥ 0.00

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Operating Safety

High-voltage circuits need interlocks to prevent incorrect operation.

Supply Reliability

Incoming, feeder, bus-coupler and protection circuits need reliable operation.

Maintenance Access

Circuit breakers and functional units need accessible inspection and replacement.

Circuit Configuration

Incoming, outgoing, metering and bus-coupler arrangements vary by project.

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넳 넲

Inner Mongolia Jushi Energy

WISCO 46 MW Blast Furnace Blower LCI Upgrade Project

Longmen Steel 27 MW Blast Furnace Blower Variable-Frequency Soft-Starting Project

Aosen Steel 1,280 m³ Blast Furnace Blower Variable-Frequency Soft-Starting Project

Jiangsu Binxin Special Steel 22 MW Blast Furnace Blower BPRT Variable-Frequency Soft-Starting Project

Hejin Hongda Special Steel 1,300 m³ Blast Furnace BPRT Variable-Frequency Soft-Starting Project

Research Test Vacuum Pump System High-Voltage VFD Speed Control Project

Shandong Tai'an 350MW Salt Cavern CAES LCI Variable Frequency Drive Project

Gansu Yumen 300MW Compressed Air Energy Storage LCI Variable Frequency Drive Project

300 MW Compressed Air Energy Storage LCI Variable-Frequency Drive Project in Yingcheng, Hubei

Three Gorges Energy's 60 MW/240 MWh Compressed Air Energy Storage Variable-Frequency Drive Project

Hubei Dayukou Chemical Co., Ltd.

Yanchang Petroleum (Group) Co., Ltd.

Hebei Zhongxiang Energy Co., Ltd.

Petrochemical Refining Project

Jiangsu Kangjie Environmental Engineering Co., Ltd.

Yibin Lantian Paper Co., Ltd.

Shandong Qifa Pharmaceutical Co., Ltd.