ComAp IM-NT - Page 142

InteliMains
NT
, SW version 3.0
InteliMains-NT-BTB-3.0-Reference Guide.pdf, ©ComAp – June 2013
142
EXAMPLE OF THERMAL OVERLOAD PROTECTION CURVE
NOTE:
When the IDMT protection is activated the BTB is opened and the event is
recorded in the Alarmlist and History. The further BTB closing is blocked until
Fault Reset has been pressed to clear the alarm (i.e. this is BOR type
protection).
12.2.6.4 Setpoint: BusL2Inom prot
Group
BusL protect
Range [units]
DISABLED, ENABLED [-]
Related FW
3.0
Description
Enables or disables the busL overcurrent (IDMT) protection. This protection
is evaluated with variable delay. For more information see setpoint
BusL2Inom del.
12.2.6.5 Setpoint: BusL2Inom del
Group
BusL protect
Range [units]
0.0 .. 60.0 [-]
Related FW
3.0
Force value
possible
YES
Description
This setpoint adjusts the reaction time of the IDMT overcurrent protection if
the overcurrent level is 200% of the nominal current.
The reaction time of the IDMT overcurrent protection is not fixed; it depends
on how much is the actual current above the limit (nominal). The higher is the
overcurrent the shorter the reaction time will be.