Fuse state indicator systems
First Claim
Patent Images
1. A fuse state indicator comprising:
- a housing containing a circuit board assembly;
an optical isolator mounted to the circuit board assembly;
at least two conductors electrically connected to the optical isolator via the circuit board assembly, said conductors extending from the housing and comprising connectors for electrically connecting to a disconnect device, so as to complete a circuit connecting the optical isolator with a fuse of the disconnect device;
wherein said optical isolator is configured to latch when a voltage differential appears across said circuit and to generate a signal in response thereto; and
an identification element configured to receive said signal from the optical isolator and to transmit a wireless signal to a remote device for indicating an operational state of the fuse.
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Accused Products
Abstract
Fuse state indicators for use with disconnect devices having a fuse are provided. Fuse state indicators include a housing having circuitry, a detecting means for detecting an open circuit condition, conductors adapted for electrical connection to a disconnect device so as to complete a circuit connecting the detecting means with a fuse of the disconnect device, and a signal transmitting means. The detecting means is configured to transmit a signal to the signal transmitting means for determining an operational state of the fuse. The signal transmitting means, in turn, is configured to transmit a signal to a remote device the state of the fuse.
26 Citations
16 Claims
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1. A fuse state indicator comprising:
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a housing containing a circuit board assembly; an optical isolator mounted to the circuit board assembly; at least two conductors electrically connected to the optical isolator via the circuit board assembly, said conductors extending from the housing and comprising connectors for electrically connecting to a disconnect device, so as to complete a circuit connecting the optical isolator with a fuse of the disconnect device; wherein said optical isolator is configured to latch when a voltage differential appears across said circuit and to generate a signal in response thereto; and an identification element configured to receive said signal from the optical isolator and to transmit a wireless signal to a remote device for indicating an operational state of the fuse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A fuse state indicator system comprising:
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a modular fusible switching disconnect device assembly comprising at least one disconnect housing and a plurality of circuit paths, wherein each of the plurality of circuit paths is completed by an overcurrent protection fuses and includes a switchable contact each of the circuit paths further including line side and load side terminals with the overcurrent protecting fuse and the switchable contact completing a current path therebetween; and a modular indicating assembly attachable to the disconnect device assembly, the modular indicating assembly comprising; an indicator housing separately provided from the disconnect housing and containing a circuit board assembly; detecting means for detecting an open circuit condition in any of the respective circuit paths one or more of the overcurrent protection fuses operate to open the circuit path, said detecting means mounted to the circuit board assembly; a plurality of pairs of conductors electrically connected to the detecting means via the circuit board assembly, each respective one of the plurality of pairs of conductors extending from the housing and comprising connectors for electrically connecting to a respective one of the current paths in the disconnect device assembly via the line side and load side terminals of each circuit path so as to complete a circuit connecting the detecting means in parallel with each of the fuses in the respective circuit paths; wherein said detecting means is configured to simultaneously monitor and generate a signal in response to operation of any of the fuses in the disconnect assembly to open one or more of the circuit paths; and a signal transmitting means configured to receive said signal from the detecting means and to transmit a signal to a remote device for indicating an operational state of the fuses in the disconnect device. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification