AUTHORISED STOCKIST OF COMPTON GREAVES SF6 RING MAIN UNIT
Ring Main Unit
SABRE Range – SF, Gas Insulated Vacuum RMU
The SABRE range of RMU combines the most advanced Vacuum & SF, technologies to meet the modem day requirements. It is fully extensible and highly flexible unit used in a wide range of applications including distribution switchboards, transformer substations, ring distribution networks and HV Connections to industrial & commercial sites. The units are developed to suit customer requirements for connection, supply, protection and sectionalising with remote operation.
The SABRE RMU’s ensure protection in the form of a circuit breaker being monitored & controlled by a self powered numerical relay. The sectionalising is enabled through ring switches.
- Stainless steel enclosure fabricated by automatic robotic welding.
- Isolation in clean SF „gas for Ring switch & in vacuum for CB.
- Suitable for Indoor& Outdoor application.
- Common Switching chamber with Vacuum Tee off circuit breaker.
- Enhanced duty in excess of IEC requirement. I All switch positions have pad-locking & Casten interlocking
- Internal arc protection including cable boxes.
- Extensible from both the sides.
- Fully SCADA compatible unit with remote switching.
The CB comprises of 3 vacuum interrupters, which have a fault-make, fault-break rating. Earthing of the outgoing cable is achieved by the use of CB in series with the off-load disconnector / selector switch. This will enhance the making capacity of the Earth switch.
These are fault-make load break switches utilising a single break 3 position switches viz., ‘ON’, ‘OFF& tarth’functions.
Operation & Safety
All operating positions and instructions are indicated on the main panel at the front of the unit. Both manual & automated versions are available in SABRE range.
Live Parts are contained within an earthed stainless steel enclosure with positive safety interlocks on all switch / selector positions ensure operator safety & prevent incorrect operation. The system is fully With the most advanced vacuum switching technology in an SF, gas filled enclosure, the units are compact and are easy to install & operate. Characterized by their reliability and operational safety, they are fully weatherproof with virtually zero maintenance.
- 4 Earth Fault indicators /Fault passage indicators
- 4 Metering module
- 4 Motorized kit for automation.
|VRN||Vacuum Ring Main Unit-Non Extensible|
|VRE||Vacuum Ring Main Unit— Extensible|
|VCE||Vacuum Circuit Breaker-Extensible|
|SSE||Single Switch —Extensible|
|DSE||Double Switch —Extensible|
|Characteristics||SABRE • VRE||VRNa||SABRE|
|Rated Voltage kV||12 / 15.5||24|
|Rated Current A||630||630 for Ring
Switch & 400 for CB
|Symmetrical Breaking Capacity kA / sec||21 / 3||16 / 3|
|Making Current kAp||52.5||40|
|Impulse Withstand kVp||75 / 110 (optional)||125|
|Min Gas Pressure Bar||0|
|Filling Pressure Bar||0.4||0.5|
|Index of protection||IP 54|
|Incoming||Side Bottom||Side Bottom|
|Tee off||Rear Bottom||Rear Bottom|