10kV High Voltage Switchgear

10kV switchgear performs the essential functions of receiving, distributing, controlling and protecting medium-voltage electrical power. Unlike the 380V or 660V low-voltage switchgear used in downstream distribution, a 10kV system requires greater attention to insulation, fault interruption, mechanical interlocking, compartmentalization and operator safety.

HAGOE KYN28-12 10kV High Voltage Switchgear uses an armored withdrawable metal-enclosed structure that separates the circuit breaker, busbar, cable and low-voltage control areas into dedicated functional compartments. The lineup can be configured for incoming feeders, outgoing feeders, bus couplers, PT applications and other primary-system requirements.

For industrial plants, substations, large buildings and infrastructure requiring 10kV power supply, correct medium-voltage switchgear configuration is important not only for normal operation but also for fault isolation and maintenance.

Why use the KYN28-12 removable structure?

One of the key characteristics of KYN28-12 is its withdrawable circuit breaker truck.

Instead of permanently mounting the circuit breaker inside the cabinet, the breaker is installed as an independent movable functional unit. For projects requiring periodic inspection, testing or breaker replacement, the withdrawable design can reduce field disassembly work and keep the primary switching equipment functionally separated from other cabinet areas.

The switchgear consists mainly of a fixed cabinet body and a withdrawable truck. The enclosure and internal functional partitions are assembled using bolted connections to create clearly defined internal areas.

Depending on the project configuration, the switchgear can accommodate vacuum circuit breaker trucks or fixed load switches.

Model Definition

Technical parameter

Mechanical interlocking and anti-misoperation design

For 10kV equipment, mechanical design is not simply a matter of cabinet fabrication. Interlocking and controlled operating sequences are important elements of medium-voltage switchgear design.

KYN28-12 incorporates a mechanical interlocking arrangement that coordinates the position of the truck, circuit breaker status and cabinet-door operation, helping reduce the risk of incorrect operation.

This is particularly important in medium-voltage systems because incorrect switching operations can result in equipment damage, power interruption or serious safety risks. When specifying 10kV switchgear, buyers should therefore evaluate more than rated voltage and current, including:

Circuit breaker type

Interlocking arrangement

Earthing arrangement

Insulation level

Compartment design

Protection and control scheme

Metal enclosed structure and IP4X protection

KYN28-12 uses an armored metal-enclosed construction, with the cabinet enclosure and internal partitions assembled by bolts.

The standard enclosure provides an IP4X protection rating, while the protection level of the circuit breaker compartment is IP2X when the compartment door is open.

The internal compartmentalized construction keeps the busbar, circuit breaker and cable areas functionally separated and helps limit access to energized components.

The cabinet surface is finished with a plastic coating to improve resistance to mechanical impact and corrosion. Cabinet materials and surface-treatment requirements can also be reviewed according to project conditions.

Vacuum circuit breaker configuration

KYN28-12 medium voltage vacuum Switchgear can be configured with different vacuum circuit breaker types according to project requirements, including VD4, VVS1, VH1, VK and ZN28 series breakers.

Vacuum circuit breakers are suitable for switching and fault protection in medium-voltage systems. Unlike traditional oil circuit breakers, vacuum interrupters do not use insulating oil as the arc-quenching medium, resulting in different requirements for equipment size, maintenance and operating conditions.

HAGOE can configure the circuit breaker according to the customer's specified brand, project technical specification and target-market requirements rather than forcing one breaker configuration for every project.

How to select a busbar system?

KYN28-12 can be applied in:

Single-Busbar Systems
A relatively simple configuration for conventional 10kV distribution systems.

Sectionalized Single-Busbar Systems
Busbar sectionalization can improve operational flexibility and allow the system to be operated according to different load and supply conditions.

Double-Busbar Systems
Suitable for projects requiring greater flexibility in switching arrangements and power supply operation.

The appropriate busbar configuration should be determined by the primary substation design, load classification, backup power arrangement and operating philosophy rather than simply selecting the most complex configuration.

Engineering differences from ordinary low-voltage switchgear

When a project distributes power from a 10kV network to a 380V/400V low-voltage system, the 10kV switchgear and low-voltage switchgear normally perform different functions at different levels of the electrical network.

For example:

10kV High Voltage Switchgear
Receives, distributes, controls and protects the medium-voltage power supply.

Transformer
Converts 10kV medium voltage to the voltage required by downstream low-voltage systems.

GGD / GCS / MNS Low Voltage Switchgear
Handles low-voltage distribution, MCC control and downstream motor and power loads.

Therefore, 10kV switchgear should not be viewed simply as a “higher-voltage version” of a low-voltage cabinet. It belongs to a different voltage level and protection architecture within the electrical distribution system.

Application Environment and Engineering Boundaries

Standard service conditions include:

• Ambient air temperature: -15°C to +40°C
• Daily average relative humidity: ≤95%
• Monthly average relative humidity: ≤90%
• Altitude: ≤2000m
• Seismic intensity: ≤8°
• The equipment should not be installed in locations with fire or explosion hazards, severe pollution, strong chemical corrosion or severe vibration.

For high-altitude locations, coastal areas, offshore platforms or other special environments, insulation, temperature-rise, corrosion protection and environmental-adaptation requirements should be reconfirmed during technical agreement preparation.

Quality Control

Quality control for medium-voltage switchgear cannot rely only on final visual inspection. HAGOE operates under ISO9001, ISO14001 and ISO45001 management systems and applies process control from incoming materials and mechanical fabrication to component assembly and complete-cabinet testing.

For KYN28-12 10kV High Voltage Switchgear , key control points include:

Cabinet Dimensions and Mechanical Strength

Compartment Construction and Protection Rating

Circuit Breaker Truck Operation

Busbar and Primary Connections

Secondary Control Wiring

Earthing System

Insulation Clearance

Factory Electrical Testing

The product design documentation covers applicable IEC, GB and relevant international standard requirements. Specific standards and testing items can be confirmed according to the destination market and project technical specification.

FAQ

1. What is 10kV High Voltage Switchgear used for?

10kV High Voltage Switchgear is used for receiving, distributing, controlling, monitoring and protecting medium-voltage power in substations, industrial plants, infrastructure projects and other 10kV distribution applications.

2. What is KYN28-12 switchgear?

KYN28-12 is anarmored withdrawable metal-enclosed switchgeardesigned for 3.6–12kV three-phase AC systems and typically equipped with withdrawable vacuum circuit breaker trucks.

3. Can KYN28-12 be used in a 10kV substation?

Yes. 10kV distribution is a typical application for KYN28-12. Incoming, outgoing, bus-coupler and other functional panels can be configured according to the substation primary system.

4. What circuit breakers can be installed in KYN28-12 medium voltage vacuum Switchgear?

According to the product configuration, KYN28-12 can accommodateVD4, VVS1, VH1, VK and ZN28vacuum circuit breakers, as well as fixed load switches according to project requirements.

5. What is the protection rating of KYN28-12?

The standard enclosure provides anIP4X protection rating. The circuit breaker compartment provides IP2X protection when its door is open.

6. What busbar arrangements are available?

KYN28-12 can be configured forsingle-busbar, sectionalized single-busbar and double-busbar systems, depending on the required power-supply reliability and operating arrangement.