Overview
KYN28-12 is an indoor armored removable (withdrawable) AC metal-enclosed switchgear designed for three-phase AC 50 Hz power systems. It receives and distributes electrical energy and provides control, protection and monitoring of the circuits it serves.
The switchgear adopts a metal-enclosed, truck-type removable structure. The main switching device is mounted on a withdrawable truck, so it can be moved between the service, test and disconnected positions without opening the enclosure. This arrangement allows inspection, testing or replacement of the truck-mounted components to be carried out with less downtime than a fixed installation.
Rated current and short-circuit withstand levels are selected to match the distribution requirements of each project, making the KYN28-12 suitable for industrial power distribution, electrical substations, commercial facilities and similar medium voltage applications.
Key Features
- Armored metal-clad construction — each functional compartment is separated by grounded metal partitions, so the busbar, circuit breaker and cable compartments are individually shielded.
- Withdrawable truck — the main switching device can be withdrawn for inspection, testing or replacement without disturbing the busbar or cable connections.
- Configurable ratings — rated current and short-circuit withstand levels are specified to suit the required distribution duty rather than fixed at a single value.
- Control, protection and monitoring — the switchgear is arranged to perform all three functions within the distribution circuit.
- Mechanical interlocking — the truck position and the earthing switch are interlocked so that the earthing switch cannot be closed while the truck is in the service position.
- Standards compliance — manufactured in accordance with GB3906, GB/T11022 and IEC60298.
Technical Specifications
| Model | KYN28-12 |
|---|---|
| Type | Indoor armored withdrawable AC metal-enclosed switchgear |
| Rated system | Three-phase AC 50 Hz |
| Rated voltage | 12 kV |
| Rated current | Configurable to project requirements |
| Short-circuit withstand | Configurable to project requirements |
| Ambient temperature | -15 °C to +40 °C |
| Daily average relative humidity | ≤ 95% |
| Monthly average relative humidity | ≤ 90% |
| Altitude | ≤ 1000 m |
| Earthquake intensity | Not more than magnitude 8 |
| Standards | GB3906, GB/T11022, IEC60298 |
Applications
- Industrial power distribution systems and factory substations
- Electrical substations and switching stations
- Commercial buildings and facilities
- Medium voltage distribution rooms requiring control, protection and monitoring
Installation Conditions
KYN28-12 is designed for normal indoor operating conditions. Ambient temperature should remain within -15 °C to +40 °C, daily average relative humidity should not exceed 95%, monthly average relative humidity should not exceed 90%, and the installation altitude should not exceed 1000 m. The switchgear is rated for earthquake intensity not more than magnitude 8.
How to Select
- Rated voltage and rated current required
- Short-circuit withstand level of the system
- Number and type of incoming and outgoing circuits
- Required protection and monitoring functions
- Installation environment and room dimensions
FAQ
What is the KYN28-12 switchgear used for?
KYN28-12 is an indoor armored withdrawable AC metal-enclosed switchgear for three-phase AC 50 Hz systems. It receives and distributes electrical energy and provides control, protection and monitoring of electrical circuits in 12 kV medium voltage distribution systems.
What does "withdrawable" mean on this switchgear?
The main switching device is mounted on a truck that can move between the service, test and disconnected positions. The truck can be withdrawn from the enclosure for inspection, testing or replacement without disturbing the busbar or cable connections.
What are the three compartments of the KYN28-12?
The enclosure is divided into separated functional compartments shielded by grounded metal partitions: the busbar compartment, the circuit breaker (truck) compartment, and the cable compartment. This armored arrangement limits the spread of an internal arc between compartments.
What standards does the KYN28-12 comply with?
The product is manufactured in accordance with GB3906, GB/T11022 and IEC60298.
What are the operating conditions for KYN28-12?
Ambient temperature -15 °C to +40 °C, daily average relative humidity ≤ 95%, monthly average relative humidity ≤ 90%, altitude ≤ 1000 m, and earthquake intensity not more than magnitude 8.
Can the rated current and short-circuit level be customised?
Yes. Rated current and short-circuit withstand levels are configured to match the distribution duty of each project rather than supplied at a single fixed rating.
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