Section 8
Commissioning and maintenance of
the fault clearing system
8.1
Commissioning and maintenance of the fault clearing
system
SEMOD56497 v1
About this chapter
This chapter discusses maintenance tests and other periodic maintenance measures.
8.1.1
Commissioning tests
SEMOD56513-5 v4
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.
8.1.2
Periodic maintenance tests
SEMOD56517-1 v1
SEMOD56520-5 v4
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.
Every four to six years
•
Periodic maintenance test for protection IEDs of objects with redundant protection
system.
1MRK 505 293-UEN B
Section 8
Commissioning and maintenance of the fault clearing system
Breaker protection REQ650
99
Commissioning manual
© Copyright 2013 ABB. All rights reserved
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