1MRS 752264-MUM
Motor Protection Relay
Operator’s Manual
REM 610
39
Relay commissioning includes:
1. Verifying that the correct application-specific settings have been entered into the
relay. This is done by reading the relay settings either via the HMI or serial
communication and comparing these to the calculated application-specific
settings. If read via serial communication, the settings can be stored as a
commissioning setting record file.
2. Verifying the current measurements – refer to section Measurements
verification
3. Testing of signal routing to output contacts – refer to section Function test
4. Testing of digital input signals availability – refer to section Digital input test
5. Testing of short-circuit protection – refer to section Testing of protection
functions
6. Testing of earth-fault protection – refer to section Testing of protection
functions
4.2.
Maintenance instructions
When performing periodic preventive maintenance, the whole circuit breaker
tripping circuit should also be tested, if possible. This can easily be done with the
plug-in unit removed from the relay case, as the terminals for output contacts in the
relay case are left open in such a situation.
Relay preventive maintenance includes verification of the relay operation and
changing possibly worn parts. The verification is carried out to ensure that the relay
hardware operates correctly, i.e. as it did when first commissioned.
4.2.1.
Relay verification
The relay maintenance verification includes:
1. Verifying measurements – can be performed according to the instructions in
section Measurements verification.
2. Verifying output contacts operation – can be performed according to the
instructions in section Function test. The circuit breaker tripping circuit should
be disconnected from the relay during this verification, in order to avoid
unwanted operation in the system. Interlocking signals should also be
disconnected from the relay during the verification in order to avoid dangerous
situations from occurring in the system.
3. Verifying digital inputs operation – can be performed according to the
instructions in section Digital input test
4.2.2.
Preventive parts replacement
When being used for real-time clock and recorded data functions, the battery should
be changed every five years; refer to section Inserting and changing the battery.
Danger!
When the plug-in unit is removed from the case, internals of the
case must not be touched. Relay case internals may have high
voltage potential and touching these may cause personal injury.
!
