RMU
Ring Main Unit
Energy - Smart Grid
RMU
Bonomi RMUs are a GIS (Gas Insulated Switches) metal enclosed for medium voltage applications (12 – 17.5 – 24 – 36 kV).
This technology guarantees excellent product performance and does not require maintenance, and is also indicated for insertion into ring networks with voltage up to 36 kV – 630 A – 20 kA and to power transformers of various voltages.
The RMU allows extensibility based on installation needs in addition to the possibility of remote control and activation.
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RMU features
| Features | kVrms | 12 | 17,5 | 24 | 36 |
|---|---|---|---|---|---|
| Rated frequency | Hz | 50 – 60 | |||
| Earth industrial frequency insulation test | kVrms | 28 | 38 | 50 | 70 |
| Earth lightning impulse insulation test | kVpeak | 75 | 95 | 125 | 170 |
| Insulation test on industrial frequency disconnection | kVrms | 32 | 45 | 60 | 80 |
| Insulation test on sectioning | kVpeak | 85 | 110 | 145 | 195 |
| Thermal current | A | 630 | |||
| Breaking capacity | A | 630 | |||
| Short time current at 1 sec. | kVarms/peak | 20/25.5 | |||
| Making capacity | kApeak | 52.5 | |||
| Mechanical endurance | M1 | ||||
| Electric class | E2 | ||||
Earth switch features
| Features | kVrms | 12 | 17,5 | 24 | 36 |
|---|---|---|---|---|---|
| Making capacity | kApeak | 52.5 | |||
| Mechanical endurance | M1 | ||||
| Electric class | E2 | ||||
Circuit breaker features
| Features | kVrms | 12 | 17,5 | 24 | 36 |
|---|---|---|---|---|---|
| Short time current (1 sec.) | kArms/ peak | 25/65 | 16/42 | ||
| Mechanical endurance | M2 | ||||
| Electric class | E2 | ||||
