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SF6 Circuit Breaker with Test Kit
This test panel can be used to understand the basic working principle of SF6 circuit breaker under over current and earth fault conditions. This set up consist of
Breaker
- Type : SF6-12KV
- Rated Voltage : 12kv
- Rated Frequency : 50hz
- Basic Insulation Level : 28KVRMS
- Short time withstand current for 3 sec : 40KA
- Operating sequence : 0-0.3s-co-3min-co
- Operating time : 36-55ms
- Closing Time : 65-95ms
- Auxiliary supply : 220vac
- Make : KIRLOSKAR ELECTRIC NY
Panel with SF6 Breaker Test set up (current injection source)
This panel consists of the following components
- Meter with Relay
- Variable ac current source with trip time indicator /meter
- Earth Fault SIMULATOR
- Meter with Relay
- One number of IDMT OC Relay with necessary CT
- One number of Electromechanical Type Earth Fault Relay with necessary CT
Over Current Relay
- Type : Single Pole /element Over Current Relay
- CT Input : 5A
- PMS : 50% -200% in steps of 25%
- TMS : 1 to 1 in steps of 0.1s
- Function : IDMT
- Curve : IDMT curve of 3sec as per IEC-255
- Features : Self powered
- Hand reset type-Mechanical Flag Indicator
- Make : MEGAWIN (MCDG11)/AREVA (CDG11)
- One number of IDMT E/F Relay with necessary CT
- Type : Single Pole /element E/F Relay
- CT Input : 2A
- PMS : 50% -200% in steps of 25%
- TMS : 1 to 1 in steps of 0.1s
- Function : IDMT
- Curve : IDMT curve of 3sec as per IEC-255
- Features : Self powered Hand reset type-Mechanical Flag Indicator
- Make : MEGAWIN (MCDG11)/AREVA(CDG11)
- One number of Variable current source of 0-30A is provided to test SF6 Breaker
- One number of digital AC Ammeter is provided to indicate the Fault current in Amp
- Autotransformer is provided to adjust the current output.
- One number of Automatic trip time measurement circuit (ATTM Circuit) is provided
- One number START push button is provided in ATTM Circuit
- One number STOP push button is provided in ATTM Circuit
- One number LCD – Digital stop Clock is provided in ATTM Circuit to measure relay trip time in S , S/10 , S/100
- One number reset switch is provided in front panel to restart the digital stop clock
This set up is designed to simulate the Earth Fault for SF6 Breaker testing , This set up consists of
- One number of 3 phase induction motor /0.5HP/CG Make/3 PHASE 415VAC/ is provided to simulate Earth Fault
- Necessary Earth side CT & all necessary terminals are terminated in motor for Earth Fault simulation
- One number of Current limit resistor is provided to adjust/limit the Earth Fault current
Other Features
- SF6 Breaker busbar input & output indicator is provided
- Necessary CT With suitable rating is provided
- Breaker trip status indicator with manual on/off switch
- All are mounted on a nice cabinet with diagram stickered on front panel.&230VAC@50Hz AC Input with power ON/OFF Switch
EXPERIMENTS
- Testing of SF6 Breaker under Over current fault conditions (under different fault current & study the tripping characteristics)
- Testing of SF6 Breaker under Earth fault conditions (under different fault current & study the tripping characteristics)
- Study the construction & operation of SF6 Breaker