Operating - DEMA CPM 310 G User Manual

Operating

NORMAL OPERATION
After the successful commissioning of CPM 310 G, normal operation conditions are reached; this
condition is kept as long as system components operate correctly and load current values are in
tolerable limits.
The purposes of electrical protection systems are; protecting the system components from abnormal
conditions and minimizing system damage under those conditions, while providing maximum supply
continuity and minimum black outs. These functions of protection systems can be obtained by building
the system with good engineering practices (which were tried to be described up to here in this
manual), but also by applying testing, maintenance, and renewal procedures on a regular basis. Even
under conditions where high performance is obtained from secondary protection systems, these
procedures must be considered to be highly important to be applied to get the maximum from these
systems.
FAULT DIAGNOSIS AND MAINTENANCE
Even under good practices of maintenance and control, electrical systems may go under faults,
overcurrent or device failures caused by mechanical, thermal or electrical stresses. When such a
condition occurs, the way to handle them is described below.
 Examination of the problem via measurement, alarm, event record and fault record menus of CPM
310 G; and via visual and electrical inspection of the system,
 Determination of the fault source, analyze of possible causes and taking of corrective actions,
 Testing and commissioning of the treated system.
RECOMMISSIONING
Whether initial or post maintenance, commissioning must be done according to the procedure
described in the former section. Undesired black-outs must be held as opportunities to test the entire
system, which are hardly found under normal service conditions. The preventive actions taken before
the commissioning increases the performance of the secondary systems, and maximizes the benefits
of well-engineered secondary protection systems. □
Normal
Operation
Recommissi
oning
Operation Cycle
Fault
Diagnosis and
Maintenance
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