PATENT CLAIM ANALYSIS

Application Number: 16003056
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-10
Patent Classification: ["702", "058000"]

Abstract:
An electronic overload relay leverages a ratio metric current design to permit size and cost optimized circuit components that can be used to sense current for purposes of protecting motors by detecting overcurrent conditions in branch motor applications in lieu of thermal overload devices. A current divider is used to significantly reduce the current that must be sensed by a magnetically coupled toroid to permit its components to be size and cost optimized and to be implemented easily on a printed circuit board. The DC resistance can be used to provide a coarse design that can be calibrated pre-manufacture to establish the accuracy required in sensing motor load current by adjusting the value of the burden resistor. Precision printed circuit board traces can be used to ensure repeatability during manufacturing. A sweepable trigger value generator can permit operation over the entire range of FLC and the threshold can be calibrated into the device.

Claim (Index 11):
A ratio metric (RM) electronic overload relay configured to provide motor overcurrent protection for a motor in a three-phase AC motor branch circuit, each branch of the motor branch circuit coupling a different phase of a main AC power source to the motor through a circuit breaker and a motor starter, the motor starter having a contactor of a predetermined size, said electronic overload relay operative to provide the overcurrent protection over an entire range of possible full load current (FLC) values consistent with the contactor size, the electronic overload relay comprising:\n three ratio metric (RM) current sensor assemblies, each configured to be coupled in series with one of the three branches to sense motor load current flowing therethrough, each RM current sensor assembly including:\n a current divider configured to be conductively coupled in series with the branch, the current divider having a low impedance conductor forming a main path, and a relatively higher impedance conductor forming a secondary path; and \n a current sensor magnetically coupled to the secondary path, the current sensor including:\n a core that is magnetically coupled to the higher impedance conductor that is fed therethrough; \n a secondary that includes one or more windings surrounding the core; and \n a burden resistor that is coupled across the secondary, \n \n wherein the RM current sensor assembly is calibrated to produce a sensed load current output signal that is proportionally related to the sensed motor load current over the range of (FLC) in its entirety; and \n a settable trip current generator that establishes a trip current value that can range in value up to a predetermined reference voltage, the trip current value being proportionally related to a load current value that if exceeded, will indicate an overcurrent condition that is a predetermined percentage above the FLC specified for the motor; and a comparator configured to receive the settable trip current value from the trip signal generator and to receive the sensed current output of at least one of the RM current sensors, the comparator configured to compare the settable trip current value with the sensed current output of at least one of the RM current sensor assemblies to produce an overload output that is active when the received sensed current output is of a magnitude equal to or greater than the settable trip current value.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 94.0
- Lexical Diversity: 1.75556
- Patent Class: 702.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15848552', '13667929', '14526863', '14553131', '10861564']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2039907656706927
- 35 USC 102 Novelty (BERT): 0.4779720937377255
- Combined Prediction Score: 0.231388898477396
- Mean Citation Score: 205.467778
- Max Citation Score: 215.00696
- Similarity Product: 169.08625781970977

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test