ComAp IG-NT - Voltage and Frequency Protections

IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
72
20,0 No action No action No action 400 200 100 40 20
50,0 No action No action No action No action 500 250 100 50
!!! VERY IMPORTANT !!!
• The maximum input range of the controller current terminals is 11 Amps. Anything over this
value is displayed as measured limit, e.g. 15 Amps from CT is measured and displayed as 11
Amps.
• Take special care when selecting CT’s. All available 5 Amp CT’s do not have a range up to 11
Amps.
Igen
Nominal current
Ishort
2Inom del
Maximal Reaction time
Reaction time
Gen >V BOC [ % ] (FV)
Threshold for generator over voltage in % of nominal voltage.
Step: 1 %
Range: Gen <V BOC – 150 % of GenNomV or GenNomVph-ph respectively
Protection: BreakerOpen & Cool-down.
Gen <V BOC [ % ] (FV)
Threshold for generator under voltage in % of nominal voltage.
Step: 1 %
Range: 50 – Gen >V BOC % of GenNomV or GenNomVph-ph respectively
Protection: BreakerOpen & Cool-down.
Hint:
All three phases are checked for generator voltage protection. Minimum or maximum out of three is used.
Gen >V Sd [ % ] (FV)
2
nd
threshold for generator over voltage in % of nominal voltage.
Step: 1 %
Range: 50 – 150 % of GenNomV or GenNomVph-ph respectively
Protection: Shutdown.