| CPC H02H 7/22 (2013.01) [H02B 1/24 (2013.01); H02H 1/04 (2013.01); H02H 1/0007 (2013.01)] | 25 Claims |
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1. An overload protection system for electrical distribution equipment, the overload protection system comprising:
a panelboard as a component of an electrical distribution system which divides an electrical power feed into branch circuits, while providing an overcurrent protective device for each branch circuit; and
a load management system (LMS) including a circuit breaker or a fuse, wherein the LMS is configured to constantly measure a total amount of energy being used at the panelboard such that when the total amount of energy measured is at or above a high programmed level, the LMS stops power from being supplied to a load and when the total amount of energy measured is at or below a low programmed level, the LMS allows power to be supplied to the load,
wherein the LMS comprises a monitoring relay in which a “threshold hysteresis” is built-in, which means that a threshold current at which an output switches from one state to another state is different depending on whether an input current is increasing or decreasing, and
wherein the “threshold hysteresis” assists to eliminate noise and ensure that the output switches accurately between ON and OFF, even if an input current level is fluctuating around a threshold current level.
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19. A method for providing an overload protection system for electrical distribution equipment, the method comprising:
providing a panelboard as a component of an electrical distribution system which divides an electrical power feed into branch circuits, while providing an overcurrent protective device for each branch circuit; and
providing a load management system (LMS) including a circuit breaker or a fuse, wherein the LMS is configured to constantly measure a total amount of energy being used at the panelboard such that when the total amount of energy measured is at or above a high programmed level, the LMS stops power from being supplied to a load and when the total amount of energy measured is at or below a low programmed level, the LMS allows power to be supplied to the load,
wherein the LMS comprises a monitoring relay in which a “threshold hysteresis” is built-in, which means that a threshold current at which an output switches from one state to another state is different depending on whether an input current is increasing or decreasing, and
wherein the “threshold hysteresis” assists to eliminate noise and ensure that the output switches accurately between ON and OFF, even if an input current level is fluctuating around a threshold current level.
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25. A kit of a load management system (LMS) for forming an overload protection system for electrical distribution equipment, the kit comprising:
a plurality of current transformers;
a circuit breaker;
a monitoring relay; and
a contactor,
wherein the plurality of current transformers, the circuit breaker, the monitoring relay and the contactor are mounted on a plate and are prewired with connections between the circuit breaker, the monitoring relay and the contactor except the plurality of current transformers,
wherein the LMS is configured to constantly measure a total amount of energy being used at a panelboard such that when the total amount of energy measured is at or above a high programmed level, the LMS stops power from being supplied to a load and when the total amount of energy measured is at or below a low programmed level, the LMS allows power to be supplied to the load,
wherein the LMS comprises a monitoring relay in which a “threshold hysteresis” is built-in, which means that a threshold current at which an output switches from one state to another state is different depending on whether an input current is increasing or decreasing, and
wherein the “threshold hysteresis” assists to eliminate noise and ensure that the output switches accurately between ON and OFF, even if an input current level is fluctuating around a threshold current level, and
wherein the kit is configured to be installed in the field.
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