Medium Voltage Switchgear
The 12~40.5kV medium voltage switchgear is an armored metal-enclosed switchgear suitable for three-phase AC 50Hz power systems at corresponding voltage levels, used for power distribution and circuit control and protection. It features safe arc-resistant design, has passed authoritative certifications, and can be equipped with intelligent components.
Product Description
KYN28-12 armored metal-enclosed switchgear, suitable for three-phase AC 50Hz/3.6~12kV single bus and single bus section power systems, used for receiving and distributing electrical energy and for controlling, protecting, and monitoring circuits. The KYN28-12 switchgear is designed to be completely arc-proof against internal faults. It features a comprehensive five-fold interlocking system, fully compliant with the requirements of State Grid and China Southern Power Grid. The rational heat dissipation channels ensure the switchgear's arc-proof capability against internal faults while meeting safe operation standards, having passed type test certification by national authoritative testing institutions.
KYN28-12
The KYN28-24 type armored withdrawable indoor high-voltage AC metal-enclosed switchgear is suitable for three-phase AC 50Hz power systems, with a rated voltage of 24kV in single busbar or single busbar sectioned systems. It is primarily used in power plants, substations, industrial and mining enterprises, and high-rise buildings for power distribution and transformation, serving as a receiving and distribution device, as well as for circuit control, protection, monitoring, and metering. It can be equipped with various models of vacuum circuit breakers and is an excellent performance distribution device.
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KYN28-24
KYN61-40.5 armored metal-enclosed switchgear, suitable for three-phase AC 40.5kV busbar and busbar section power systems, used for receiving and distributing electrical energy and for controlling, protecting, and monitoring circuits. The KYN61-40.5 switchgear is designed to be completely arc-resistant to internal faults. It features a comprehensive five-fold interlocking system, with an internal air clearance of ≥300mm, fully meeting the requirements of State Grid and China Southern Power Grid. The rational heat dissipation channels ensure the switchgear's arc resistance to internal faults while meeting safe operation requirements, having passed type test certification by national authoritative testing institutions. It can be equipped with smart components such as electric vacuum circuit breakers, electric grounding switches, and wireless temperature measurement, enabling functions like one-touch sequential control and incoming/outgoing line temperature measurement.
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KYN61-40.5
Product Advantages
Compact Structure
Modular design results in compact size, space savings, and easy installation and maintenance.
Easy Maintenance
The modular design facilitates easier maintenance and component replacement, reducing outage time.
High safety
The metal armored structure provides excellent mechanical strength and protection, and the internal compartment design effectively isolates arcs, ensuring operational safety and continuity of power supply.
High Reliability
The five-prevention interlock is complete and reliable, preventing misoperation; internal components are made of high-quality materials and have undergone rigorous testing to ensure long-term stable operation.
Good Scalability
Flexible configuration and expansion can be tailored to meet different application scenarios.
Medium Voltage Switchgear
KYN28-12 | KYN28-24 | KYN61-40.5
KYN28-12
| Parameter | Unit | 7.2kV | 12kV |
| Insulation Voltage | kV | 7.2 | 12 |
| Rated Power-Frequency Withstand Voltage | kV/1min | 30 | 42 |
| Rated Lightning Impulse Withstand Voltage | kV | 60 | 75 |
| Rated Frequency | Hz | 50 | 50 |
| Rated Short-Time Withstand Current | kA/4S | 40 | 40 |
| Rated Peak Withstand Current | kA | 100 | 100 |
| Busbar Rated Current | A | 4000 | 4000 |
| Branch Busbar Rated Current | A | 4000 | 4000 |
| Internal Arc Fault Withstand Current | kA/0.5S | 40 | 40 |
| IP Rating | IP4X | IP4X | |
| IK Rating | IK10 | IK10 | |
| Overall Dimensions (W×D×H, excluding front/rear doors) | mm | 650×(800/1000/1200) | |
| Weight | kg | 800-1800 |
KYN28-24
| Parameter | Unit | Value |
| Rated Voltage | kV | 24 |
| Rated Frequency | Hz | 50 |
| Rated Current | A | 630, 1250 |
| Short-Time Withstand Current (4S) | kA | 20, 25, 31.5 |
| Short-Circuit Breaking Current | kA | 20, 25, 31.5 |
| Short-Circuit Making Current (Peak) | kA | 50, 63, 80 |
| Protection Degree | IP4X, IP2X when isolation compartment and circuit breaker compartment doors are open |
KYN61-40.5
| Parameter | Unit | 40.5kV |
| Insulation Voltage | kV | 40.5 |
| Rated Insulation Voltage | kV | 40.5 |
| Rated Power-Frequency Withstand Voltage | kV/1min | 95 |
| Rated Lightning Impulse Withstand Voltage | kV | 185 |
| Rated Frequency | Hz | 50 |
| Rated Short-Time Withstand Current | kA/4S | 31.5 |
| Rated Peak Withstand Current | kA | 80 |
| Busbar Rated Current | A | 2500 |
| Branch Busbar Rated Current | A | 2500 |
| IP Rating | IP4X | |
| Overall Dimensions (W×D×H, excluding front/rear doors) | mm | 1400 (1680) × 2750 (2800/3050/3200) × 2600 |
| Weight | kg | 1000-2000 |
