InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf,
©ComAp – April 2015
218
11.2.6.18
Setpoint: ROCOF df/dt
Group
Mains protect
Range [units]
0.1 .. 10.0 [Hz/s]
Related FW
standard v3.1.0
Description
This setpoint adjusts the trip level for ROCOF protection (Rate Of Change Of
Frequency). The "filtration level" for the ROCOF protection is adjusted by
setpoint
N
OTE
:
If measured value of df/dt exceeds ROCOF df/dt, ROCOF protection is
activated. The message ROCOF is writen in history of controller and
corresponding logical binary output is activated
. Value of df/dt is
evaluated from mains voltage.
N
OTE
:
To activate or deactivate ROCOF protection, please use
Choose proper breaker which will be opened if ROCOF protection activates
by adjusting setpoint
11.2.6.19
Setpoint: Mains V unbal
Group
Mains protect
Range [units]
0 .. 200 [%]
Related FW
standard v3.1.0
Description
This setpoint defines the threshold level for Mains voltage unbalance
protection. The voltage unbalance is calculated as a maximum difference
between phase voltages. This protection is evaluated with delay given by
11.2.6.20
Setpoint: Mains Vunb del
Group
Mains protect
Range [units]
0.0 .. 600.0 [s]
Related FW
standard v3.1.0
Description
This setpoint adjusts delay for mains voltage unbalance alarm (see
).
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