Section 12 Commissioning And Maintenance Of The Fault Clearing System; Commissioning Tests; Periodic Maintenance Tests - ABB rec670 Commissioning Manual

1MRK 511 360-UEN A
Section 12
12.1
12.2
Bay control REC670 2.1 IEC
Commissioning manual
Commissioning and maintenance of the fault clearing system
Commissioning and maintenance of the
fault clearing system

Commissioning tests

During commissioning all protection functions shall be verified with the setting
values used at each plant. The commissioning tests must include verification of all
circuits by green-lining the circuit diagrams and the configuration diagrams for the
used functions.
Further, the settings for protection functions are tested and recorded carefully as
outlined for the future periodic maintenance tests.
The final testing includes primary verification of all directional functions where load
currents is checked on the local HMI and in PCM600. The amplitudes and angles of
all currents and voltages should be checked and the symmetry verified.
Directional functions have information about the measured direction and, for
example, measured impedance. These values must be checked and verified as correct
with the export or import of power available.
Finally, final trip tests must be performed. This involves activation of protection
functions or tripping outputs with the circuit breaker closed and the tripping of the
breaker verified. When several breakers are involved, each breaker must be checked
individually and it must be verified that the other involved breakers are not tripped at
the same time.

Periodic maintenance tests

The periodicity of all tests depends on several factors, for example the importance of
the installation, environmental conditions, simple or complex equipment, static or
electromechanical IEDs, and so on.
The normal maintenance praxis of the user should be followed. However, ABB's
recommendation is as follows:
Every second to third year
• Visual inspection of all equipment.
• Removal of dust on ventilation louvres and IEDs if necessary.
• Periodic maintenance test for protection IEDs of object where no redundant
protections are provided.
Section 12
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