Load-break switch
Module for switching feeders and distribution circuits.
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Ring Main Unit · Gas-insulated
MGC 24/36
Compact, modular ring main unit for secondary distribution, control, and protection in medium-voltage networks.
24 / 36kV
630A
up to 25kA
Gas Insulated Ring Main Unit01 / Overview
Compact by design.
Flexible by nature.
MGC 24/36 integrates switching, protection, and isolation functions into a gas-insulated ring main unit platform.
Its architecture supports load-break switch, vacuum circuit breaker, and switch-fuse modules. Basic units can be combined in a common tank to meet customized network configurations.
02 / Modular configuration
One family.
Multiple functions.
Functions are combined according to the project's diagram and protection strategy.
Vacuum circuit breaker
Protection module with short-circuit breaking capability.
Switch-fuse combination
Compact transformer protection using high-voltage fuses.
Sectionalizing
Isolation and connection functions for busbar configurations.
Direct connection
Module adaptable to incoming feeders, outgoing feeders, and specific needs.
Metering
Configuration for potential transformers and metering functions.
03 / Performance and protection
Ready for
demanding environments.
IP67 sealed tank
Main components remain inside a tank with a high level of environmental protection.
Internal arc protection
AFLR classification available for front, lateral, and rear protection during internal arc events.
Low leakage rate
Design with a specified annual gas leakage rate of ≤0.01%.
High mechanical endurance
Up to 10,000 operations for selected functions and an IK10-rated enclosure.
04 / Technical specifications
Two voltage levels.
One modular platform.
Reference ratings for load-break switch, vacuum circuit breaker, and fuse modules.
| Parameter | MGC 24 kV | MGC 36 kV |
|---|---|---|
| Rated frequency | 60 Hz | 60 Hz |
| Rated current | 630 A | 630 A |
| Power-frequency withstand voltage | 65 / 79 kV | 95 / 118 kV |
| Lightning impulse | 125 / 145 kV | 185 / 215 kV |
| Rated short-time withstand current | 20–25 kA / 4 s | 25 kA / 3 s |
| Rated peak withstand current | 50 / 63 kA | 63 kA |
| Gas pressure at 20 °C | 0.04 MPa | 0.04 MPa |
| Annual leakage rate | ≤0.01% | ≤0.01% |
| Tank protection | IP67 | IP67 |
| Enclosure protection | IP41 / IK10 | IP4X / IK10 |
05 / Common tank
Up to six functions
in one configuration.
Basic modules can be combined on request in a common tank for compact, customized solutions.
The supplied reference lists a depth of 750 mm for 12 kV switchgear and a height of 1,450 mm without the low-voltage compartment. Optional low-voltage compartment heights are 200, 360, and 470 mm.
| Number of modules in common tank | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Net tank width (mm) | 325 | 65* | 975 | 1,300 | 1,625 | 1,950 |
06 / Operational advantages
07 / Configure MGC
Build the unit
for your diagram.
Share the required functions, voltage, current, protection, and layout to define your MGC 24/36 configuration.