Ground relay system in a multiplex direct grounding system

Details Ground relay system in a multiplex direct grounding system Ground relay system in a multiplex direct grounding system

2005-07-26

2005-07-26

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S062000

Reexamination Certificate

active

06922318

ABSTRACT:
A ground relay system is provided which includes: first current transformers located in the respective phases of a sending end of a high-voltage distribution provided from a distribution substation; over-current relays connected to the first transformers; distribution transformers located in the respective phases in the respective sections of the distribution; second current transformers connected to secondary sides of the distribution transformers; current converters connected to the second transformers; and a current comparator that introduces the currents of the respective phases of the sending end of the distribution from the relays to produce a first zero-phase current, introduces the currents of the respective phases of a load end of the high-voltage distribution from the current converters to produce a second zero-phase current, and operates a ground protection relay that opens a circuit breaker inserted at the sending end of the high-voltage distribution if the level of the first current is larger.

REFERENCES:
patent: 3617812 (1971-11-01), Deter
patent: 4297740 (1981-10-01), Hagberg
patent: 4600961 (1986-07-01), Bishop
patent: 5309109 (1994-05-01), Miyazaki et al.
patent: 5475556 (1995-12-01), Yoon et al.
patent: 5790357 (1998-08-01), Schiel
patent: 5892646 (1999-04-01), Parker et al.
patent: 6249230 (2001-06-01), Baldwin et al.
patent: 6369995 (2002-04-01), Kagawa et al.
Sekine, Yasuji: “Distribution Technology Overall Manual”, p. 10, left column, lines 8-28; p. 10, left column, line 29 to p. 12, right column, line 1; p. 360, right column, line 6 to p. 361, right column, line 7, published by Ohm Co. (Nov. 30, 1991).

Affiliated with

Also associated with

Rating

Ground relay system in a multiplex direct grounding system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ground relay system in a multiplex direct grounding system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground relay system in a multiplex direct grounding system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3369871