KYN28-12 armoured removable AC metal enclosed switchgear

TOONICE’s the full name of the KYN28 switchgear is KYN28-12 Type Indoor Metal-Clad Withdrawable High-Voltage Switchgear (where “K” stands for “metal-clad”, “Y” for “withdrawable”, “N” for “indoor”, “28” is the design serial number, and “12” represents a rated voltage of 12kV). It is the most widely used standardized equipment in medium-voltage power distribution systems (10kV/35kV). Its core function is to realize the distribution, control, protection and monitoring of medium-voltage electric energy. Through the design of “metal-clad isolation + withdrawable components”, it balances safety, reliability and operation & maintenance convenience, and serves as the “core hub” for medium-voltage power distribution in fields such as industry, power grids and commercial buildings.

I.Core Features

1.”Metal-clad Type” Compartment Design, Ultimate Safety:

The cabinet body uses metal partitions (cold-rolled steel plates) to divide the interior into 4 independent compartments. A triple isolation of “fire prevention, arc prevention, and electric shock prevention” is realized between each compartment. Even if a short-circuit arc fault occurs in a certain compartment, it can effectively limit the fault range and avoid spreading to other areas (such as the busbar compartment, instrument compartment), thus ensuring the safety of operation and maintenance personnel and equipment.

2. “Withdrawable” Circuit Breaker Trolley, Convenient for Operation and Maintenance:

The core component (circuit breaker) is integrated on the “trolley”. The trolley can be flexibly pushed and pulled along the guide rail and has three fixed positions: “operation, test, and maintenance”.

3. Built-in dual protection of “mechanical interlock + electrical interlock”, strictly following the “five-prevention” requirements for medium-voltage power distribution (prevent mis-switching of circuit breakers, prevent switching on/off disconnectors under load, prevent earthing live parts, prevent closing with earthing devices connected, and prevent entry into live compartments)Multiple interlocking protection to prevent misoperation.

II. Technical characteristics

III. Structural Composition

The structure of KYN28 switchgear is designed around “safety isolation and functional zoning”, with various components working together to achieve power control and protection. The specific composition is as follows:

IV. Typical Application Scenarios:

1. Industrial Field

① Large factories (such as steel plants, chemical plants): Act as the “main switch” for medium-voltage power distribution in workshops, control the power supply for high-voltage motors and transformers, and withstand the inrush current of industrial loads;

② Power plants (such as thermal/hydropower plants): Used in plant power systems (such as medium-voltage control of feed water pumps and induced draft fans) to ensure the stability of the power consumption of the power plants themselves.

2. Power Grid and Infrastructure

① Urban substations (10kV distribution stations): Serve as the medium-voltage power distribution hub for residential and commercial areas, distributing the power after stepping down from 110kV/35kV to each distribution area;

② Transportation hubs (subways, airports): Used for medium-voltage power supply in subway traction substations and airport terminals, meeting the demand for high reliability (annual failure rate ≤ 0.1 times);

③ Data centers: Provide medium-voltage control for high-voltage UPS and transformers in data centers to ensure the continuous power supply for core computer rooms.

3. Commercial and Civil Buildings

① Super high-rise buildings (such as skyscrapers): Due to the long distance and large loss of low-voltage power distribution, 10kV medium-voltage power distribution is adopted to floor substations, and KYN28 switchgear serves as the main medium-voltage cabinet of the building to realize layered power control;

② Large commercial complexes (such as shopping malls, convention and exhibition centers): Control the medium-voltage power supply for air conditioning, elevators, and lighting systems, and support flexible switching of multiple circuits.