Current monitoring apparatus

Details Current monitoring apparatus Current monitoring apparatus

1982-08-06

1984-01-24

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 42, 361 47, H02H 902, H02H 300

Patent

active

044280211

ABSTRACT:
Apparatus for monitoring the fault current in the ground conductor of a polyphase AC electrical power system. When the fault current exceeds a predetermined level, the magnetic field produced causes a magnetic reed switch to close and open at twice the AC frequency. Pulse producing circuitry connected to the reed switch responds to the switch action to produce pulses at the same frequency. The pulses are counted by logic circuitry, and when a predetermined number of pulses have been counted, an output signal triggers circuitry which trips circuit breaker apparatus in the power system. The delay period between first detecting the fault current and tripping of the circuit breaker apparatus can be adjusted by changing the number of pulses to be counted by the logic circuitry before it produces an output signal.

REFERENCES:
patent: 4101826 (1978-07-01), Horsitmann

Affiliated with

Also associated with

Rating

Current monitoring apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1290461