Battery charger
First Claim
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1. In a system for charging storage batteries from a three phase power source, said charging system including three input lines, one for each phase of said source, charging output terminals for connection to storage batteries to be charged, and a charging circuit coupled to said input lines and energizeable by said source for applying a charging signal across said charging output terminals;
- a control circuit for said battery charging system comprising;
a plurality of contactor means disposed in said input lines and operable to connect said source to said chargng circuit and thereby effect energization thereof; and
circuit means for controlling the operation of said contactor means incuding;
contactor control means energizeable to operate said contactor means;
phase sensitive relay means connected to said input lines and enabled in response to the presence of a source voltage on each of said input lines of selected magnitude and phase sequence;
means connected to said input lines for producing a control signal and for applying said control signal to said phase sensitive relay; and
control switch means operable in response to enablement of said phase sensitive relay means and responsive to said applied control signal for connecting said control signal to said contactor control means to effect energization thereof;
whereby said contactor means are operated to energize a charging circuit.
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Abstract
A control circuit for a three phase battery charging system which is enabled only when a battery is properly connected, when the source is properly connected and when the system has been properly turned on. Any disruption in these connections or failure of the source interrupts the charging cycle until the failure has been corrected.
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Citations
8 Claims
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1. In a system for charging storage batteries from a three phase power source, said charging system including three input lines, one for each phase of said source, charging output terminals for connection to storage batteries to be charged, and a charging circuit coupled to said input lines and energizeable by said source for applying a charging signal across said charging output terminals;
- a control circuit for said battery charging system comprising;
a plurality of contactor means disposed in said input lines and operable to connect said source to said chargng circuit and thereby effect energization thereof; and circuit means for controlling the operation of said contactor means incuding; contactor control means energizeable to operate said contactor means; phase sensitive relay means connected to said input lines and enabled in response to the presence of a source voltage on each of said input lines of selected magnitude and phase sequence; means connected to said input lines for producing a control signal and for applying said control signal to said phase sensitive relay; and control switch means operable in response to enablement of said phase sensitive relay means and responsive to said applied control signal for connecting said control signal to said contactor control means to effect energization thereof; whereby said contactor means are operated to energize a charging circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a control circuit for said battery charging system comprising;
Specification