Armored Withdrawable AC Metal-Enclosed Switchgear
Product Overview
The KYN28-12 indoor armored, center-mounted AC metal-enclosed switchgear (hereinafter referred to as the “center-mounted cabinet”) is a complete distribution unit designed for 3.6–12 kV three-phase AC systems at 50 Hz, suitable for single-bus and single-bus sectionalized configurations. It is primarily used in power plants, for power delivery from small and medium-sized generators, for distribution in industrial, mining, and other enterprises, as well as for receiving and delivering power in secondary substations of the electric utility system and for starting large high-voltage motors. The equipment provides control, protection, and monitoring functions. It can be equipped with either VS1 vacuum circuit breakers or vacuum circuit breakers from various domestic and international manufacturers, such as VD4, 3AE, and HVX.
Terms of Use
● Altitude: ≤ 1000 m;
● The ambient air temperature shall not exceed 40°C, and the 24-hour average shall not exceed 35°C.
● The preferred minimum ambient air temperatures are: -5°C, -15°C, and -25°C.
● Average temperature of the hottest month: 30°C;
● Maximum annual average temperature: 20°C;
● Installation environment: No significant contamination; no explosive or corrosive gases or dust; and no severe vibration or impact at the installation location.
● If the requirements for normal operating conditions cannot be met, users are requested to consult with our company to resolve the issue.
Implementation Standard
● GB/T 3906-2020 3.6 kV to 40.5 kV AC metal-enclosed switchgear and control equipment;
● GB/T 11022-2020 Common Technical Requirements for High-Voltage AC Switchgear and Control Equipment Standards;
● GB/T 1984-2020 High-Voltage AC Circuit Breakers;
● IEC-298 AC Metal-Enclosed Switchgear and Control Equipment with Rated Voltage of 1–72 kV
● IEC-56 High-Voltage AC Circuit Breaker
● IEC 694 General Requirements for High-Voltage Switchgear and Control Equipment
● IEC 62271-100
● IEC 62271-102
● IEC 62271-200
Main Features
● Made from high-quality aluminum-zinc coated steel sheet, offering superior mechanical strength and a high degree of protection.
● The circuit breaker is mounted on a removable trolley for easy maintenance and replacement.
● Equipped with comprehensive mechanical interlocking functions to prevent misoperations, such as closing or opening the circuit breaker under load and unauthorized entry into energized compartments.
● Equipped with a reliable earthing switch to ensure the safety of maintenance personnel.
● Small footprint, saving land
● A pressure-relief vent is provided at the top of the cabinet to prevent pressure buildup in the event of an internal fault.
Technical Specifications
Project |
Unit |
Parameters |
|||
Rated voltage |
kilovolt |
3.6, 7.2, 12 |
|||
Rated frequency |
Hertz |
50 |
|||
Circuit breaker rated current |
A |
630, 1250, 1600, 2000, 2500, 3150 |
|||
Rated current of the switchgear |
A |
630, 1250, 1600, 2000, 2500, 3150 |
|||
Rated dynamic stability current (4 s) |
kA |
16, 20, 25, 31.5, 40, 50 |
|||
Rated Steady-State Current (Peak) |
kA |
40, 50, 63, 80, 100, 125 |
|||
Rated short-circuit breaking current |
kA |
16, 20, 25, 31.5, 40, 50 |
|||
Rated short-circuit making current (peak) |
kA |
40, 50, 63, 80, 100, 125 |
|||
Rated Insulation Level |
1-minute power-frequency withstand voltage |
kilovolt |
24 |
32 |
42 |
Lightning impulse withstand voltage |
40 |
60 |
75 |
||
Protection rating |
|
The enclosure has an IP4X rating; when the isolation compartment and circuit-breaker compartment doors are open, the rating is IP2X. |
|||
Technical Parameters of VD4 and VS1-12 Vacuum Circuit Breakers
Project |
Unit |
Parameters |
|
Rated voltage |
kilovolt |
12 |
|
Rated frequency |
Hertz |
50 |
|
Circuit breaker rated current |
A |
630, 1250, 1600, 2000, 2500, 3150 |
|
Rated dynamic stability current (4 s) |
kA |
16, 20, 25, 31.5, 40, 50 |
|
Rated steady-state current (peak) |
KA |
40, 50, 63, 80, 100, 125 |
|
Rated short-circuit breaking current |
KA |
16, 20, 25, 31.5, 40, 50 |
|
Rated short-circuit making current (peak) |
kA |
40, 50, 63, 80, 100, 125 |
|
Rated Insulation Level |
1 min power-frequency withstand voltage |
kilovolt |
42 |
Lightning impulse withstand voltage |
kilovolt |
75 |
|
Rated Operating Sequence |
|
Open–0.3s–Close–180s–Close–50 |
|
Rated short-circuit breaking current breaking operations |
This bout |
50 |
|
Mechanical life |
This bout |
20000 |
|
Mechanical Characteristics of VD4 and VS1 Vacuum Circuit Breakers
Project |
Unit |
Parameters |
|
Contact opening distance |
mm |
11±1 |
|
Overtravel |
mm |
4±0.5 |
|
Phase-to-phase center distance |
mm |
210±0.5, 275±0.5 |
|
Closing contact bounce time |
milliseconds |
≤2 |
|
Three-phase trip non-synchronization |
milliseconds |
≤2 |
|
Trip time |
highest |
milliseconds |
≤50 |
Rated |
milliseconds |
≤50 |
|
Minimum |
milliseconds |
≤60 |
|
Closing time |
milliseconds |
≤100 |
|
Average closing speed |
m/s |
0.9–1.2 |
|
Average tripping speed |
m/s |
0.6-0.8 |
|
Technical Parameters of the Operating Mechanism
Project |
Unit |
Parameters |
|
Rated operating voltage |
Closing coil |
V |
AC/DC 220, 110 |
Trip coil |
V |
AC/DC 220, 110 |
|
Coil power |
Closing coil |
W |
245 |
Trip coil |
W |
245 |
|
Energy storage motor power |
W |
50 |
|
Rated voltage of the energy storage motor |
V |
AC/DC 220, 110 |
|
Storage time |
S |
≤10 |
|
External mounting dimensions (mm)
Contact Us
0411-83167110
No. 95, West Section of Shiji Road, Pulandian District, Dalian City, Liaoning Province
Leave a message to get a product quote.
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