Battery ground fault detecting circuit
First Claim
1. A battery ground fault detecting circuit applied to an uninterruptible power system having a controller and being connected to a battery box having a ground terminal, wherein said battery ground fault detecting circuit is employed for detecting whether a ground fault is occurred in a battery mounted in said battery box so that said controller executes a corresponding protection procedure thereupon, comprising:
- a detector electrically connected to said ground terminal of said battery box for detecting a ground current signal outputted from said ground terminal;
a signal processor electrically connected to said detector for filtering and amplifying said ground current signal;
a peak value comparator electrically connected to said signal processor and having a predetermined peak value for comparing said filtered and amplified ground current signal with said predetermined peak value so as to generate an AC control signal when said peak value of said ground current signal is larger than said predetermined peak value; and
a signal converter electrically connected to said peak value comparator for converting said AC control signal into a DC control signal and transmitting said DC control signal to said controller for executing said corresponding protection procedure to said uninterruptible power system in response to said DC control signal.
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Accused Products
Abstract
A battery ground fault detecting circuit applied to an uninterruptible power system is disclosed. The uninterruptible power system has a controller and is connected to a battery box having a ground terminal. The battery ground fault detecting circuit is employed for detecting whether a ground fault is occurred in a battery mounted in the battery box, so that the controller can execute a corresponding protection procedure. The battery ground fault detecting circuit includes a detector electrically connected to the ground terminal of the battery box for detecting a ground current signal outputted from the ground terminal, a signal processor electrically connected to the detector for filtering and amplifying the ground current signal, a peak value comparator electrically connected to the signal processor and having a predetermined peak value for comparing the filtered and amplified ground current signal with the predetermined peak value so as to generate an AC control signal when the peak value of the ground current signal is larger than the predetermined peak value, and a signal converter electrically connected to the peak value comparator for converting the AC control signal into a DC control signal and transmitting the DC control signal to the controller for executing a corresponding protection procedure to the uninterruptible power system in response to the DC control signal.
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Citations
20 Claims
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1. A battery ground fault detecting circuit applied to an uninterruptible power system having a controller and being connected to a battery box having a ground terminal, wherein said battery ground fault detecting circuit is employed for detecting whether a ground fault is occurred in a battery mounted in said battery box so that said controller executes a corresponding protection procedure thereupon, comprising:
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a detector electrically connected to said ground terminal of said battery box for detecting a ground current signal outputted from said ground terminal;
a signal processor electrically connected to said detector for filtering and amplifying said ground current signal;
a peak value comparator electrically connected to said signal processor and having a predetermined peak value for comparing said filtered and amplified ground current signal with said predetermined peak value so as to generate an AC control signal when said peak value of said ground current signal is larger than said predetermined peak value; and
a signal converter electrically connected to said peak value comparator for converting said AC control signal into a DC control signal and transmitting said DC control signal to said controller for executing said corresponding protection procedure to said uninterruptible power system in response to said DC control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An uninterruptible power system, comprising:
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a controller;
a battery box having a ground terminal; and
a battery ground fault detecting circuit electrically connected to said controller and said battery box for detecting whether a ground fault is occurred in a battery mounted in said battery box so that said controller executes a corresponding protection procedure, said battery ground fault detecting circuit comprising;
a detector electrically connected to said ground terminal of said battery box for detecting a ground current signal outputted from said ground terminal;
a signal processor electrically connected to said detector for filtering and amplifying said ground current signal;
a peak value comparator electrically connected to said signal processor and having a predetermined peak value for comparing said filtered and amplified ground current signal with said predetermined peak value so as to generate an AC control signal when said peak value of said ground current signal is larger than said predetermined peak value; and
a signal converter electrically connected to said peak value comparator for converting said AC control signal into a DC control signal and transmitting said DC control signal to said controller for executing said corresponding protection procedure to said uninterruptible power system in response to said DC control signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification