ABB Relion 605 Series - Page 41

1MDU07212-YN Rev. D Section 4
Protection and Control Function
REF601 / REJ601 / REM601 35
Application Manual
Table 21: Setting ranges Under current protection
Parameter
Value (Range)
Start value, ‘3I<”
0.12…0.80 x Ib, in steps of 0.01
Operate delay time, ‘t3I<’
0. … 30 s, in steps of 0.1
Block the phase reversal protection
0 = No, 1 = Yes
Operation accuracy
± 5.0% of set value
Operation time accuracy
3% of set or ± 30 ms
Reset ratio
0.98
4.12 Emergency restart
4.12.1 Functionality
An emergency restart function helps to keep essential critical motors in running
condition by allowing motor start up even though start inhibit is active. The
emergency startup function ESMGAPC allows motor startup during emergency
conditions. After the emergency start input is activated, the motor can be started
normally.
4.12.2 Principle of operation
Emergency restart function has fixed timer of 10 min. which can be activated when
the binary input ESTART RQ is activated and motor standstill condition (all the
three phase currents are below 0.12xIn) is fulfilled.
When emergency start input is the activated, it temporary increases the thermal trip
value ϑ
trip
by the setting ϑ
EM
. Once emergency start input is activated, it remains
active for duration of 10min or until it is kept pressed whichever is higher. The
activation and deactivation of input START_EMERG is recorded as an event.
4.13 Motor runtime counter
4.13.1 Functionality
The generic runtime counter function MDSOPT calculates and presents the
accumulated operation time of a motor as the output. The unit of time for
accumulation is hour.
The accumulated operation time is one of the parameters for scheduling a service
for the motors. It indicates the use of the motor and hence the mechanical wear and
tear. Generally, the equipment manufacturers provide a maintenance schedule
based on the number of hours of service.