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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. □
Operation Cycle
Normal
Operation
Fault
Diagnosis and
Maintenance
Recommissi
oning
Summary of Contents for CPM 310 G
Page 1: ...CPM 310 G Digital Overcurrent Protection Relay User Application Manual vEN 2016 03...
Page 2: ...2...
Page 6: ...6 ABOUT DEMA...
Page 11: ...11 INTRODUCTION...
Page 32: ...32 PACKING LABELING INFORMATION...
Page 34: ...34 OPERATING MANUAL...
Page 53: ...53 RELAY MENUS MANUAL...
Page 55: ...55 The Menu Tree...
Page 56: ...56...
Page 57: ...57...
Page 58: ...58...
Page 59: ...59...
Page 60: ...60...
Page 61: ...61...
Page 128: ...128 DIGICONNECT PC PROGRAM MANUAL...
Page 189: ...189 APPLICATION DIAGRAMS...
Page 191: ...191 Sample Power Transformer Protection Application Diagram...
Page 193: ...193 FUNDAMENTAL CABLING DIAGRAM...
Page 203: ...203 APPLICATION DIAGRAM NO 10 RS485 Cabling...
Page 204: ...204 TECHNICAL DATA...
Page 220: ...220 GLOSSARY...