DocumentCode :
2986652
Title :
Monitoring neutral-grounding resistors
Author :
Paulson, Gany E.
Author_Institution :
Startco Eng. Ltd., Saskatoon, Sask., Canada
fYear :
1999
fDate :
21-25 June 1999
Firstpage :
238
Lastpage :
241
Abstract :
Many of the problems associated with ungrounded and solidly grounded distribution and utilization systems are overcome with resistance grounding. Resistance grounding limits point-of-fault damage, eliminates transient overvoltages, reduces the flash hazard and provides adequate tripping levels for selective ground-fault detection and coordination. High-resistance and low-resistance grounding systems are reviewed with respect to charging current, ground fault detection and ground fault coordination. Reasons for monitoring the neutral-grounding resistor (NGR) are presented. Problems associated with NGR monitoring are discussed and monitor design requirements are summarized. These design requirements guided development of a NGR monitor that measures current in the transformer neutral, transformer neutral-to-ground voltage and continuity of the NGR.
Keywords :
earthing; monitoring; overvoltage protection; power distribution protection; resistors; charging current; design requirements; distribution system protection; flash hazard; ground fault coordination; ground fault detection; neutral-grounding resistors monitoring; point-of-fault damage; resistance grounding; transformer neutral; transformer neutral-to-ground voltage; transient overvoltages; tripping levels; Capacitance; Fault currents; Fault detection; Grounding; Monitoring; Protection; Relays; Resistors; Surges; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Pulp and Paper, 1999. Industry Technical Conference Record of 1999 Annual
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-5526-1
Type :
conf
DOI :
10.1109/PAPCON.1999.779372
Filename :
779372
Link To Document :
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