Commissioning And Maintenance - ABB REU 610 Operator's Manual

1MRS755770
5.
5.1.
Voltage Protection Relay
Operator's Manual

Commissioning and maintenance

The relay should be subject to regular tests and maintenance in
accordance with national regulations and instructions.
Prior to commissioning, the functionality of the application-specific relay
configuration and settings have to be tested.
During relay commissioning, the overvoltage and undervoltage protection and
residual voltage protection is to be tested by using secondary testing to secure
personal safety. Additionally, correct operation of input and output signals to and
from the relay should be verified.
The relay is a numerical protection relay with functionality implemented in the relay
software configuration. Software functionality does not change over time and the
relay performs extensive self-supervision during operation. Therefore, it is not
necessary to perform extensive relay testing during periodic maintenance.
When the protection relay is operating under the specified conditions (refer to the
Technical Reference Manual), the manufacturer recommends preventive
maintenance to be performed every five years. This periodically performed
preventive maintenance is to be carried out to secure correct and safe operation of
the relay. When performing preventive maintenance, the correct functionality of the
relay is to be verified as well as the wiring circuitry to and from the relay.
If the environmental conditions at the relay operating site differ from
those specified, for instance temperature and humidity, or if the
atmosphere around the relay contains chemically active gases or dust,
the relay ought to be visually inspected.
At the visual inspection, the following should be observed:
Signs of mechanical damage on the relay, contacts and relay case.
*
Rust spots or signs of corrosion on the terminals or case.
*
Do not remove the plug-in unit from the relay case during any phase of
the testing when primary circuit is live. The high voltage in secondary
voltage transformer circuit may be lethal and damage instruments and
insulation.
Commissioning instructions
Relay commissioning is carried out to confirm correct operation of the relay when it
is taken into use.
REU 610 REU 610
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