Product range · 12 kV
Medium voltage switchgear
KYN28A-12 and XGN□-12 cubicles for 12 kV distribution, with the insulation type test position stated on the page.
Product overview
The primary side of the distribution
Medium voltage cubicles sit between the incoming supply and the transformer. They switch, protect and isolate. In most plants they are also the equipment the utility or the network operator has an opinion about.
KYN28A-12 is a metal-clad cubicle for 12 kV indoor installation; XGN□-12 is a fixed-type cubicle in ring and terminal configurations. Both use vacuum circuit breakers or load break switches depending on the duty.
Because the documentation position for medium voltage is narrower than for low voltage, we state it plainly below, so it can be checked at enquiry stage.
Protection relay, indication and operating devices on a cubicle door.
Product types
Three cubicle types
Technical specifications
What the reports cover
| Parameter | Value | Source |
|---|---|---|
| Rated voltage | 12 kV | Nameplate |
| Rated current | 630 A / 1250 A | Manufacturer declared |
| Rated short-circuit breaking current | 20 kA / 31.5 kA | Manufacturer declared |
| Power-frequency withstand voltage | 42 kV / 48 kV | Measured in test report |
| Lightning impulse withstand voltage | 75 kV / 85 kV | Measured in test report |
| Auxiliary circuit withstand | 2000 V | Measured in test report |
| Enclosure protection | IP4X | Manufacturer declared |
| Design standard | GB/T 3906-2020 | Test basis |
The reports for these cubicles are insulation type tests. Temperature rise, short-circuit making and breaking, and mechanical operation are not covered by them. If your project requires those tests, tell us at enquiry stage and we will confirm what can be provided.
Applications
Where 12 kV cubicles are used
Plant substations
Incoming and outgoing circuits for 12 kV/0.4 kV transformers inside industrial plants.
Ring and terminal configurations
Distribution points where a ring main unit arrangement is specified.
Transformer protection
Fused and breaker-controlled circuits protecting the transformer on the primary side.
Related
Usually supplied together
FAQ
Questions on this range
Is this equipment type tested to IEC 62271?
The reports we hold are issued against GB/T 3906-2020, the Chinese standard for this equipment family, and cover insulation tests. They are not IEC 62271 type test reports. If your specification calls for IEC type tests, tell us at enquiry stage and we will confirm whether the requirement can be met before quoting.
Which tests were actually performed?
Three: power-frequency withstand on the main circuit, lightning impulse withstand, and the auxiliary circuit withstand at 2000 V. Temperature rise, short-circuit making and breaking, and mechanical endurance are not part of these reports.
Can the cubicles be configured for our network?
Circuit configuration, protection, metering and cable termination are set by the project drawing. The incoming and outgoing arrangement, the type of breaker or switch, and the relay scheme are agreed before production.
Need 12 kV cubicles for a substation?
Send the single-line diagram and the network parameters. We will confirm the configuration and the documentation that comes with it.