Protection system for power distribution systems
View Patent ↗There is disclosed a protection system for a power distribution system. The system has a processor, a breaker; a network coupled to the processor, a first module coupled to the network and the breaker, a second module coupled to the network, and an algorithm. The algorithm monitors for a permission to trip request. If a plurality of permission to trip requests are received during a given time period, the algorithm issues a permission granted command to the first module and a hold command to the second module.
1. A protection system for a power distribution system, comprising:
a processor;
a breaker;
a network coupled to said processor;
a first module coupled to said network and said breaker;
a second module coupled to said network; and
an algorithm that monitors for a permission to trip request, said algorithm being configured to issue a permission granted command to said first module and a hold command to said second module if a plurality of permission to trip requests are received during a given time period.
2. The protection system of claim 1 , wherein said first module issues a trip command to said breaker after receiving said permission granted command.
3. The protection system of claim 1 , wherein said algorithm issues a single trip permission granted command if only a single permission to trip request was received during said given time period.
4. The protection system of claim 1 , wherein said processor receives data associated with said first module and said second module.
5. The protection system of claim 1 , wherein said algorithm is employed in said processor.
6. A protection system for a power distribution system, comprising:
a processor;
a breaker;
a network coupled to said processor;
a module coupled to said network and said breaker; and
an algorithm associated with said module, said algorithm communicating a permission to trip request to said processor and monitoring for either a hold message or a permission granted message from said processor as a response to said permission to trip request, wherein said module trips said breaker upon receipt of said permission granted message.
7. The protection system of claim 6 , wherein said module starts a first countdown upon generating said permission to trip request.
8. The protection system of claim 7 , wherein said module trips said breaker if said first countdown exceeds a predetermined limit before receiving either said permission granted message or said hold message.
9. The protection system of claim 6 , wherein said module starts a second countdown if said module receives said hold message.
10. The protection system of claim 9 , wherein said module monitors a condition associated with one selected from the group consisting of said module and said breaker.
11. The protection system of claim 10 , wherein said module resets said second countdown if said condition is below a threshold.
12. The protection system of claim 10 , wherein said module trips said breaker if said second countdown completes.