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KYN28A-24 Armored Removable Ac Metal-Enclosed Switchgear

KYN28A-24 Armored Removable Ac Metal-Enclosed Switchgear

KYN28A-24 Armored Removable Ac Metal-Enclosed Switchgear

The Armored Removable AC Metal-Enclosed Switchgear is a high-performance electrical distribution solution designed for indoor three-phase power systems operating at 50/60Hz with a rated voltage of 24kV. This switchgear is widely applied in power plants, substations, industrial enterprises, and high-rise buildings, where it plays a critical role in receiving, distributing, controlling, protecting, and monitoring electric circuits.

Specification

Technical parameters of switch equipment

project unit parameter
Rated short-term withstand current (4s) KA 20 31.5
Rated peak withstand current kA 50 80
Auxiliary control circuit rated voltage v DC or AC 110/220
Protection level IP4X (circuit breaker room door open or compartment room is IP2X)
Dimensions (width × depth × height) mm 800×1810×2380 1000×1810×2380
weight kg 840~1440

project unit parameter
Rated voltage kv 24
Rated frequency Hz 50/60
Rated insulation level Lightning impact withstand voltage (peak value) kv Relatively 60 Isolation break 79
1min power frequency withstand voltage (valid value) kv Relatively 125 Isolation break 145
Auxiliary control circuit power frequency withstand voltage V 2000
Rated current A 630, 1250, 1600, 2000, 2500, 3150
Rated short circuit breaking current KA 20 31.5
Rated short circuit closing current (peak value) kA 50 80

Technical parameters of VS1-24, VN2-24 vacuum circuit breaker

project unit parameter
Rated voltage KV 24
Rated insulation level 1min power frequency withstand voltage (valid value) kv 60
Lightning impact withstand voltage (peak value) kv 125
Rated frequency Hz 50/60
Rated current A 630, 1250, 1600, 2000 630, 1250, 1600, 2000, 2500, 3150
Rated short circuit breaking current kA 20 31.5
Rated short circuit closing current (peak value) kA 50 80
Rated short-term withstand current (4s) kA 20 31.5
Rated peak withstand current kA 50 80
Rated single capacitor bank turn-off current A 630
Rated back-to-back capacitor bank switch-off current A 400
Rated short circuit breaking current breaking times Second-rate 50
Mechanical life Second-rate 20000
Rated operating sequence O-0.3s-CO-180s-CO

Technical parameters of spring actuation mechanism

project unit parameter
Rated operating voltage Closed trip coil V AC220, AC110, DC220, DC110
Opening trip coil
Operating current Closed trip coil A AC220 or DC220 is 1.1
AC110 or DC10 is 3.1
Opening trip coil
Energy storage motor power w 80,100
Rated voltage of energy storage motor V AC220, AC110, DC220, DC110
Electric energy storage time S ≤10

Description

Key Features

Enhanced Safety Mechanisms
The Armored Removable AC Metal-Enclosed Switchgear is equipped with a comprehensive set of interlocking mechanisms to prevent operational errors. These safety features include:
- Prevention of moving the circuit breaker trolley under load conditions.
- Blocking of the circuit breaker operation when the grounding switch is in the closed position.
- Prevention of closing the grounding switch when the circuit breaker is energized.
- Restriction of access to live competitions to avoid accidental contact with energized components.
These robust safety measures significantly reduce the risk of human error and enhance the overall security of electric systems.

High-Quality Vacuum Circuit Breakers
This switchgear incorporates VS1 and VN2 series medium-voltage vacuum circuit breakers, renowed for their good performance performance in breaking and making current with relatively small arc energy. These vacuum circuit breakers ensure high insulation strength, long service life, and reliable short-circuit protection. The inclusion of sealed vacuum interrupters enhances the durability and operational efficiency of the Armored Removable AC Metal-Enclosed Switchgear.

Advanced Control and Protection
To ensure optimal system protection and monitoring, the switchgear’s secondary circuit is equipped with highly reliable control and protection components. These elements include microprocessor-based relays and digital monitoring systems that facilitate real-time status tracking and fault diagnosis. This intelligent design helps to optimize maintenance schedules and improve overall network reliability.

good Insulation and Structural Integrity
The Armored Removable AC Metal-Enclosed Switchgear employs advanced insulation technologies, including heat-shrink insulation materials and epoxy-coated busbars. The optimized electrode design and compact cabinet structure minimize electric stress and improve insulation performance. These features contribute to enhanced safety, long-term reliability, and efficient space utilization.

Operating and Environmental Conditions
Designed to operate under a wide range of environmental conditions, the switchgear meets stringent industry standards:
- the largest ambient temperature: 40°C
- rudimentary ambient temperature: -15°C
- 24-hour average temperature not exceeding 35°C
- the largest daily relative humidity: 95%
- the largest monthly relative humidity: 90%
- the largest daily vacuum pressure: 2.2 kPa
- the largest monthly vapor pressure: 1.8 kPa
- Altitude not exceeding 1000m
- Protection from dust, smoke, corrosive gases, steam, and salt mist contamination
- Negligible external vibrations or seismic activity
- Electronic magnetic interference (EMI) within acceptable limits, ensuring secondary system voltage induction remains below 1.6kV

Customizable Heating and Condensation Prevention
To mitigate condensation risks, the Armored Removable AC Metal-Enclosed Switchgear is equipped with built-in heaters. These heating elements are activated when the switchgear is in standby mode and can also operate during normal system functions to maintain optimal humidity levels within the enclosure.

Special Operating Conditions
For environments where standard operating conditions are exceeded, the switchgear can be customized through mutual agreements between the manufacturer and the user. Specialized adaptations, such as additional insulation enhancements and reinforced environmental sealing, can be implemented to meet specific application needs.

The Armored Removable AC Metal-Enclosed Switchgear is a technically advanced and highly reliable distribution solution for medium-voltage power systems. With its robust safety interlocks, high-performance vacuum circuit breakers, advanced control features, and good insulation, this switchgear ensures stable and secure electrical network operation.

Zhejiang NENA Electric Co., Ltd.
Zhejiang NENA Electric Co., Ltd.

The company is located in Shuguang Industrial Zone, Weng Town, Yueqing City, the "China Electrical Capital". The main products include complete high- and low-voltage sets of cabinets, intelligent soft start series, inverters, auto-coupling pressure-reducing starter cabinets, star-delta starter cabinets, QZB transformers, AC contactors, etc. The company's products have won unanimous praise from customers at home and abroad for their excellent performance, stable quality, and professional after-sales service. It has a high reputation in the market and a high reputation among peers.

  • 0
    Establishment

    Founded in 1992, NENA has 33 years of experience in the industry.

  • 0+
    Current Employee

    We have more than 300 employees, including 52 technical R&D personnel.

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    Happy Clients

    There are more than 1,000 cooperative customers around the world.

Certificate Of Honor
  • 2020 Assured Consumer Unit
  • Excellent Enterprise
  • Specialised, Specialised And New SMES
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