MV Switchgear

XGN66-12(Z) Fixed Metal-Enclosed Switchgear

XGN66-12(Z) fixed metal-enclosed switchgear combines a VS1 vacuum circuit breaker with a compact cabinet for indoor 12 kV secondary distribution. It suits substations, industrial facilities and building power rooms where equipment footprint is an important part of the layout.

The cabinet uses a VS1 vacuum circuit breaker and an IP2X enclosure for indoor 50 Hz distribution. Circuit current, protection and cable terminations are specified for the chosen arrangement; the catalogue does not publish a single current range for all configurations.

Technical Specifications

Rated Voltage	12 kV
Rated Frequency	50 Hz
Breaker Type	VS1 vacuum
Enclosure IP Rating	IP2X
Standards	GB 3906 / DL/T 404 / IEC 60298

Key Features

Compact and cost-effective for secondary distribution.
"Five-prevention" interlocking.
Simple structure, easy maintenance.
For industrial parks and commercial buildings.

Typical Applications

Power stations and substations
Factories, mining sites and high-rise buildings
Switching stations

Installation & Aftercare

Prepare the site, plan routine checks and keep service records.

What needs to be ready before installation?

Allow space for cable bends and working access as well as the cabinet footprint; confirm how the fixed breaker can be removed.
Install on the specified level foundation with earthing, auxiliary wiring and cable interfaces matched to the supplied drawings.
Keep the switchroom dry and free from conductive contamination; provide any anti-condensation measures specified for the installation.

What should operators check during routine rounds?

Observe breaker position, relay alarms and operating history during rounds, and note unusual noise or smell.

What is covered during planned maintenance?

At planned isolation, qualified personnel inspect the VS1 mechanism, interlocks, insulation and cable and earthing connections.
Stiff operation, fault interruption or visible tracking requires assessment before reuse; follow the installed breaker’s servicing and test requirements.

Customization Options

Define the electrical configuration and the details needed for your site.

Switchboard lineup: Incoming, outgoing, bus-coupler and metering panels to the approved single-line diagram.
Breaker & busbar duty: Select rated current and fault-breaking duty within the published series range.
Protection & measurement: Relay functions, CT/VT ratios, meter requirements and secondary circuit diagrams.
Cable & installation: Cable quantity and size, entry direction, panel interfaces and the required maintenance aisle.
Controls & signalling: Auxiliary supply voltage, local/remote control and requested alarm or communication interfaces.

Project-specific options and accessories are confirmed in the quotation and approved drawings.