Adjustable line isolation monitor

Details Adjustable line isolation monitor Adjustable line isolation monitor

1974-10-21

1976-04-13

Caldwell, John W.

Communications: electrical

Systems

Call station

317 18R, G08B 2100

Patent

active

039507424

ABSTRACT:
A novel method and apparatus for monitoring an isolated system for ground faults which provides greater sensitivity and accuracy and at the same time does not provide a detector hazard index which would add to the fault hazard index. The monitor connects one of the lines in the isolated system to ground through a non-linear detector. The detector allows current below a predetermined level to flow freely to ground and prevents current which is above a predetermined level from flowing to ground. This is achieved by immediately disconnecting the line in question from ground, by limiting the amplitude of the ground current to the predetermined level, or both. This predetermined current level sensed may be adjusted by the operator. In addition, the monitor includes an alarm circuit which indicates the existence of an unacceptable ground fault in the isolated system.

REFERENCES:
patent: 3066284 (1962-11-01), McKinley et al.
patent: 3590322 (1971-06-01), Carr

Affiliated with

Also associated with

Rating

Adjustable line isolation monitor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable line isolation monitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable line isolation monitor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-755129