Measurement On A Gis (Sf6) Switch Gear - Omicron CT SB2 User Manual

CT Analyzer User Manual
3.5.3

Measurement on a GIS (SF6) switch gear

Applicable for CT Test mode and Advanced CT Test mode.
Proceed as follows to perform measurements on a GIS (SF6) switch gear (refer to Figure 3-9). Observe
the general safety rules in section 3.1 on page 23 and the safety instructions given in chapter 1 "Safety
instructions" on page 9.
1. Disconnect all utility lines.
2. Open all circuit breakers to the bus bars.
3. Close the earthing switch.
4. Connect one secondary side terminal of the CT to protective earth.
5. Connect the secondary side of the CT to the CT Analyzer OUTPUT sockets and input SEC:
► Connect that side of the CT that is connected to PE to the black sockets of CT Analyzer.
► Connect that side of the CT that is open to the red sockets of CT Analyzer.
6. Connect the primary side of the CT to CT Analyzer input PRIM. Make sure that the polarity is correct
(same colors on same polarity).
Utility line
disconnected
100m max.
Figure 3-9: Measurement on a GIS (SF6) switch gear
34
Gas insulated busbar
3m max.
Coax measurement cables
Earthing switch
Circuit breaker
Burden
OMICRON