The KYN28A-12 armored withdrawable metal-enclosed AC switchgear is designed for three-phase AC 50Hz, 12kV power systems. It is mainly used in power plants, substations, industrial enterprises, railway transportation, and high-rise buildings for the reception and distribution of electrical energy.

Dimensions

800 (650, 1000) mm × 1500 (1610) mm × 2300 mm

Structural Features

Fully armored with a modular assembly structure, offering a wide range of combination options.           

 The cabinet is made from aluminum-zinc plated steel, processed with CNC and laser cutting equipment. It uses advanced multi-folding technology, with rivet nuts and high-strength bolts for connections. This ensures high precision, corrosion resistance, lightweight, high strength, and strong part interchangeability.            

Compatible with various vacuum circuit breakers and SF6 circuit breakers, providing extensive applicability and high reliability with long-term maintenance-free operation.            

The draw-out unit has three positions: working, testing, and disconnected, each with positioning and display devices for safety and reliability.           

Draw-out units are modularized, ensuring interchangeability among units of the same specification.             

The cable compartment can accommodate up to 3-6 three-core cables.            

Each high-voltage chamber has an independent pressure relief channel to ensure personal safety. 

The cabinet door features a viewing window to observe the operational status of the internal components.            Complies with standards such as GB3906 and IEC298.            

Standards

IEC60298: Metal-enclosed Switchgear and Controlgear for Alternating Currents Above 1kV and Up to 36kV.

GB3906-2013: 3~35kV AC Metal-enclosed Switchgear.

GB11022-2015 and other relevant standards.

Technical Parameters

Rated Current: 630A/1250A/1600A/2000A/2500A/3150A/4000A
Rated Voltage: 12kV
Rated Short-circuit Breaking Current: 16kA/20kA/25kA/31.5kA/40kA/50kA
Rated Short-circuit Closing Current: 40~125kA
1-minute Power-frequency Withstand Voltage: 42kV/48kV (disconnection point)
Lightning Impulse Withstand Voltage: 75kV/85kV (disconnection point)
Enclosure Protection Level: IP4X; when the circuit breaker compartment door is open, the protection level is IP2X.