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KYN28-12 Armored Withdrawable AC Metal-Enclosed Switchgear - China Suppliers and Factory for High-Voltage Solutions
Basic Product Overview
KYN28-12 high-voltage switchgear cabinet (labeled as feeder cabinet) is a mainstream indoor metal-clad switchgear widely used in 10kV power distribution systems. As a core device in medium-voltage power grids, it undertakes the tasks of power receiving, distribution, fault protection, and operational monitoring, and is widely applied in substations, industrial and mining enterprises, commercial buildings, and urban power distribution networks.
The KYN28-12 cabinet (also known as KYN28A-12) adopts a withdrawable, compartmentalized metal-enclosed structure (complying with GB3906-2020 and IEC 62271-200 standards). Its design separates the cabinet into independent functional compartments through grounded metal partitions:
- Circuit Breaker Compartment — Houses the withdrawable vacuum circuit breaker
- Busbar Compartment — Encloses the main busbars for power distribution
- Cable Compartment — Manages incoming/outgoing cable connections
- Secondary Control Compartment — Contains protection relays, metering, and control devices
⚠ Key Feature: Grounded metal partitions between compartments prevent fault expansion and significantly improve the safety of operation and maintenance. The secondary circuit uses plug-in connectors, simplifying wiring and maintenance.
Application Scenarios
As a feeder cabinet, the KYN28-12 is mainly used to distribute power from the main busbar to downstream loads (e.g., transformers, motors, or other distribution cabinets). Typical application scenarios include:
- 🏭 Industrial Plants — Power distribution for high-power equipment (e.g., pumps, fans, production lines) in steel, chemical, and manufacturing industries.
- 🏢 Commercial Buildings — Power supply for lighting, air conditioning, and elevators in shopping malls, office buildings, and hospitals.
- ⚡ Urban Substations — 10kV distribution network outgoing lines, connecting to residential area transformers.
- 🌿 Renewable Energy Systems — Connecting wind/solar power generation units to the grid (with customized protection functions).
✓ Summary: The KYN28-12 feeder cabinet is a mature, reliable 10kV high-voltage switchgear with standardized parameters, safe compartmentalized design, and comprehensive protection functions. It balances operational safety, maintenance convenience, and system stability, making it one of the most widely used medium-voltage switchgear in the current power distribution industry.
Core Technical Parameters
| Parameter | Specification / Value |
|---|---|
| ⚡ Rated Voltage | 12kV (adapted to 10kV power systems; maximum operating voltage: 12kV) |
| 🔄 Rated Frequency | 50Hz (matches the standard power grid frequency in most countries and regions) |
| 🔌 Rated Current — Main Circuit | 630A, 1000A, 1250A, 1600A (feeder scenarios typically use 630A / 1250A) |
| 🔌 Rated Current — Auxiliary Circuit | 220V / 380V (for powering control, protection, and monitoring components) |
| ⚡ Short-Time Withstand Current | ≥ 25kA (duration: 4s; withstands steady-state short-circuit current impact) |
| ⚡ Peak Withstand Current | ≥ 63kA (resists instantaneous peak current generated by short-circuit faults) |
| 🔒 Power Frequency Withstand Voltage | 42kV (1 min; between live parts and ground; between different phases) |
| ⛈ Lightning Impulse Withstand Voltage | 75kV (protects against overvoltage caused by lightning strikes or switching operations) |
| 🛡 IP Protection Grade | IP4X standard (IP54 available for harsh environments) |
| 🌡 Operating Temperature | -10°C to +40°C (derate by 1% per 1°C above 40°C) |
| ⛰ Altitude | ≤ 1000m (derating required above 1000m) |
| 💧 Humidity | Daily average ≤ 95%, monthly average ≤ 90% (no condensation) |
Detail Pictures
Frequently Asked Questions (FAQ)
Q
What is the difference between KYN28-12 and KYN28A-12?
A
KYN28-12 and KYN28A-12 refer to the same product line. "KYN28A-12" is an updated or manufacturer-specific designation that indicates compliance with the latest standards (GB3906-2020 / IEC 62271-200). Both share identical core structures, compartmentalized designs, and technical parameters.
Q
What rated current options are available for the KYN28-12 feeder cabinet?
A
The main circuit supports common specifications of 630A, 1000A, 1250A, and 1600A. For typical feeder scenarios, 630A and 1250A are most commonly used. The auxiliary circuit operates at 220V/380V to power control, protection, and monitoring components.
Q
Can the KYN28-12 be used outdoors or in high-humidity environments?
A
The standard KYN28-12 is designed for indoor use with an IP4X protection rating, suitable for dry indoor environments. For harsh or high-humidity environments, an IP54-rated version can be customized. Operating humidity should not exceed a daily average of 95% or monthly average of 90%, with no condensation.
Q
What happens if the KYN28-12 is installed at an altitude above 1000 meters?
A
The standard rating is designed for altitudes up to 1000m. When installed above 1000m, derating of the equipment's current-carrying capacity and insulation performance is required due to reduced air density. Please consult the manufacturer for altitude-specific derating guidelines and customized configurations.
Q
Is the KYN28-12 suitable for renewable energy applications such as wind or solar power?
A
Yes. The KYN28-12 feeder cabinet can be configured for renewable energy systems, including wind and solar power generation. Customized protection functions (such as anti-islanding, directional overcurrent, and grid synchronization protection) can be integrated to meet the specific requirements of connecting generation units to the grid.
Q
What international standards does the KYN28-12 comply with?
A
The KYN28-12 complies with the Chinese national standard GB3906-2020 and the international standard IEC 62271-200, which govern metal-enclosed switchgear and controlgear for AC systems with rated voltages above 1kV and up to and including 52kV. These standards ensure consistent safety, performance, and interoperability requirements.