24kv Medium Voltage Lv and Mv Switchgear

The Usune 24kV Medium Voltage Lv And Mv Switchgear, KYN28-24 (Z)(GZS1), belongs to the armored withdrawable AC metal-enclosed switchgear category. It is suitable for three-phase AC 50Hz power systems and is mainly used for power reception, distribution, circuit control, protection, and monitoring.

The 24kV Medium Voltage Lv And Mv Switchgear is widely used in power plants, substations, industrial and mining enterprises, and high-rise buildings for power reception, distribution, control, and protection. Usune's core production base is located in China, making it a trusted professional manufacturer providing high-quality medium-voltage power distribution solutions to users worldwide.

Low voltage switchgear

Medium voltage switchgear

Main Technical Parameters

Our products strictly adhere to the following standards

1. GB3906-2006 "3.6-40.5kV AC Metal-Enclosed Switchgear and Controlgear"
2. GB/T11022 "General Technical Conditions for High-Voltage Switchgear and Controlgear"
3. IEC62271-200 "AC Metal-Enclosed Switchgear with Rated Voltage Above 1kV and Below 52kV"
4. DL/T404 "Technical Conditions for Ordering Indoor AC High-Voltage Switchgear"

Cabinet Structure

The 24kV Medium Voltage Low and Medium Voltage Switchgear adopts an all-metal partitioned structure, with each functional area independently isolated, effectively suppressing the spread of fault arcs.

1. Circuit Breaker Compartment: Equipped with a removable vacuum circuit breaker trolley.
2. Busbar Compartment: Contains main busbars, branch busbars, and busbar insulators.
3. Cable Compartment: Installs current transformers, voltage transformers, grounding switches, and cable terminals.
4. Control Instrument Compartment: Equipped with relays, protection devices, instruments, secondary wiring, and control panels.
5. Pressure Relief Channel: Features an arc relief device on the top of the cabinet to enhance fault safety.

Core Features

1. All-metal independent compartments to prevent the spread and mutual interference of fault arcs.

2. Comprehensive mechanical five-proof interlocking:
- Prevents pushing or pulling the circuit breaker trolley under load.
- Prevents closing the circuit breaker when the grounding switch is closed.
- Prevents accidental closing of the grounding switch while energized.
- Prevents accidental entry into energized compartments.
- Prevents misoperation of the isolating switch.

3. Center-mounted removable trolley for front operation and maintenance, facilitating repairs.

4. High insulation level, compact structure, and strong fault resistance.

5. Compliant with domestic and international standards, adaptable to various power distribution schemes

Practical Application Cases

Case 1: A Municipal Substation in Eastern China

1. Project Background

A 110kV municipal substation needed to upgrade its secondary power distribution network to meet the growing urban power demand and improve power supply reliability.

2. Solution

36 Usune 24kV Medium Voltage Lv And Mv Switchgear units were deployed for the 24kV power distribution system.

3. Results

- The compact design of the switchgear saved 30% of the substation's floor space.
- The five-proof interlocking system operated without any operational accidents during three years of operation.
- Reliable vacuum circuit breaking technology reduced outage time by more than 80%, significantly improving the power supply quality for 200,000 residents.

Case 2: A Large Petrochemical Plant in Central Asia

1. Project Background

A modern petrochemical complex required a highly reliable medium-voltage power distribution system to ensure the continuous operation of critical production equipment.

2. Solution

Provided 58 Usune 24kV switchgear units, specifically designed for harsh industrial environments and enhanced with dust and corrosion resistance.

3. Results

- Successfully withstood the harsh on-site environment (high dust, chemical fumes), demonstrating stable performance.
- Fast fault disconnection capability (≤ 60ms) protects expensive compressors and reactors from damage during short circuits.
- Front-mounted maintenance design reduces maintenance downtime by 50%, ensuring production continuity.

Product External Dimension

Project Reference

Cas-space Rocket Launch Project

Test Report

FAQs

Q1: What is the applicable voltage range of this 24kV Medium Voltage Lv And Mv Switchgear?

A1: The product is suitable for 3.6～12kV, 24kV three-phase AC 50/60Hz power systems, meeting the needs of most medium-voltage power distribution scenarios.

Q2: Does the equipment support on-site maintenance and repair?

A2: Yes. The product adopts a front-operated, front-maintenance design; the circuit breaker trolley can be moved for quick maintenance and replacement without affecting the operation of other circuits.

Q3: As a professional supplier, does your factory offer customized solutions?

A3: Yes. Usune can customize rated current, short-circuit breaking current, cabinet size, protection configuration, etc., according to project requirements to adapt to different operating conditions and system requirements.