Parameterization
5-54 | SRW 01
5
NOTE!
The overvoltage protection is only available when the Current/Voltage Measurement Unit (UMCT) is
used. And it will only be active after the motor start time has elapsed, as per relay trip class (P640).
E.g. Trip class 10, after 10 s.
5.7.20 Undervoltage
This protection allows to monitor the voltage minium variations. When some voltages measured are below the limit
adjusted in parameter P657 for the time defined in parameter P658, the motor can be shut down or just an alarm
can be activated, according to parameter P659.
P657 – Undervoltage
Adjustable
Range:
1 to 30 %
Factory
Setting:
15 %
Proprieties:
Sys, rw
Description:
It defines the undervoltage percentage in relation to the motor rated voltage (P400).
P658 – Undervoltage Time
Adjustable
Range:
0 = Disable
1 to 99 s Enabled
Factory
Setting:
3 s
Proprieties:
Sys, rw
Description:
It defines the undervoltage time to shut down the motor or signal an alarm. If P658 = 0, the function is disabled.
P659 – Undervoltage Protection Action
Adjustable
Range:
0 = Alarm
1 = Switch Off (Trip)
Factory
Setting:
1
Proprieties:
Sys, rw
Description:
It defines the undervoltage protection action.
NOTE!
The undervoltage protection is only available when the Current/Voltage Measurement Unit (UMCT) is
used. And it will only be active after the motor start time has elapsed, as per relay trip class (P640).
E.g. Trip class 10, after 10 s.
5.7.21 Underpower
The underpower protection can be used to detect the motor load loss, when there are no great variations in the
motor current, for instance, in applications with hydraulic pumps that cannot operate with not load.
When the underpower level is below the limit adjusted in parameter P660 for the time defined in parameter P661,
the motor can be shut down or just an alarm can be activated, according to parameter P662.
Summary of Contents for SRW 01
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Page 128: ...Monitoring 6 20 SRW 01 6...
