Intelligent electronic device and method thereof
First Claim
Patent Images
1. An intelligent electronic device (IED) having enhanced power quality and communications capabilities, the IED comprising:
- (a) at least one input channel for receiving AC voltages and currents,(b) at least one sensor for sensing the at least one input voltage and current channel,(c) at least one analog to digital converter for outputting digitized signals, and(d) a processing system including;
a volatile memory and a non-volatile memory for storing captured waveform samples from at least one of said at least one analog to digital converter,a means to store waveform samples from said volatile memory to said non-volatile memory, anda means to trigger to store said waveform samples based on an adaptive algorithm.
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Abstract
An intelligent electronic device (IED) having a gain control unit adapted to selectively regulate operating ranges of output signals of a sensing circuit of the device is described. In one embodiment, the IED is a digital electric power and energy meter, which operating ranges for supply voltages and supply currents of electrical services may be adjusted to match pre-determined ranges for input signals of a data acquisition system or a data processing module of the meter.
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Citations
20 Claims
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1. An intelligent electronic device (IED) having enhanced power quality and communications capabilities, the IED comprising:
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(a) at least one input channel for receiving AC voltages and currents, (b) at least one sensor for sensing the at least one input voltage and current channel, (c) at least one analog to digital converter for outputting digitized signals, and (d) a processing system including; a volatile memory and a non-volatile memory for storing captured waveform samples from at least one of said at least one analog to digital converter, a means to store waveform samples from said volatile memory to said non-volatile memory, and a means to trigger to store said waveform samples based on an adaptive algorithm. - View Dependent Claims (2, 3, 4, 5)
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6. An intelligent electronic device (IED) having enhanced power quality and communications capabilities, the IED comprising:
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(a) at least one input channel for receiving AC voltages and currents, (b) at least one sensor for sensing the at least one input voltage and current channel, (c) at least one analog to digital converter for outputting digitized signals, and (d) a processing system including; a volatile memory and a non-volatile memory for storing captured waveform samples from at least one of said at least one analog to digital converter, a means to store waveform samples from said volatile memory to said non-volatile memory, and a means to trigger to store said waveform samples based on an envelope type waveform trigger algorithm. - View Dependent Claims (7, 8, 9, 10)
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11. An intelligent electronic device (IED) having enhanced power quality and communications capabilities, the IED comprising:
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(a) at least one input channel for receiving AC voltages and currents, (b) at least one sensor for sensing the at least one input voltage and current channel, (c) at least one analog to digital converter for outputting digitized signals, and (d) a processing system including; a volatile memory and a non-volatile memory for storing captured waveform samples from at least one of said at least one analog to digital converter, at least one processor to store waveform samples from said volatile memory to said non-volatile memory, the at least one processor generates a trigger to store said waveform samples based on an envelope type waveform trigger algorithm, wherein the envelope type waveform trigger is determined by
Vt1−
Vth1<
Vt2<
Vt1+Vth2where Vt1 is a voltage sampled at time T1 and Vt2 is a voltage sampled at time T2 which is one cycle after time T1 and Vth1 is a first and lower voltage difference and Vth2 is a second and upper voltage difference so that a bracket is formed surrounding Vt1 that Vt2 is expected to fall within. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification