ABB REM 610 Technical Reference Manual page 5

1MRS 755537
Motor protection Relay
Technical Reference Manual
5.1.2.3. Checking the set safe stall time for cold starts .119
5.1.2.4. Checking the set safe stall time for a
5.1.2.5. Restart disable level, 49 RESTDIS ..................120
5.1.2.6. Prior alarm level, 49 ALARM ............................120
5.1.2.7. Time constant multiplier, K
5.1.3. Start-up supervision .......................................................120
5.1.3.1. Start-up supervision based on thermal stress
5.1.3.2. Checking the need for speed switch ................121
5.1.4. Cumulative start-up time counter ...................................121
5.1.5. Short-circuit protection ...................................................122
5.1.6. Unbalance and phase reversal protection .....................122
5.1.6.1. Selecting the pickup value for element 46 .......122
5.1.6.2. Selecting the time constant, 46 TDIAL .............122
5.1.6.3. Connection with two phase
5.1.7. Ground-fault protection ...................................................123
5.1.7.1. Stabilizing virtual ground-fault currents ............124
5.1.7.2. Increasing the sensitivity of the ground-fault
5.1.8. Circuit-breaker failure protection ....................................124
5.1.9. Temperature protection (optional) ..................................124
5.2. Application examples ................................................................125
5.2.1. Protecting a circuit-breaker controlled motor .................125
5.2.2. Protecting a motor at an ambient temperature other than
40°C ...............................................................................126
5.2.3. Protecting a contactor controlled motor .........................127
5.2.4. Protecting non-rotating objects ......................................128
5.2.5. Ground-fault protection in an isolated or a compensated
network ..........................................................................128
5.2.6. Ground-fault protection in a solidly grounded network ...128
6. Ordering information ............................................................130
7. Revision history of REM 610 ................................................132
7.1. Revision identification ...............................................................132
7.2. Changes and additions to the earlier released revision A .........132
8. References .............................................................................133
9. Abbreviations ........................................................................134
10.Check lists ..........................................................................136
single start ........................................................120
calculation ........................................................120
current transformers .........................................123
protection .........................................................124
REM 610
................................. 120
c
5