GE Power Quality Meter Series User Manual

GE Power Management PQM Power Quality Meter 4-15
4 PROGRAMMING 4.2 S1 PQM SETUP
4
This feature involves a separate sampling data stream. All input channels are sampled continuously at a rate of
16 times per cycle. Using a single-cycle block interval, the input samples are checked for trigger conditions as
per the trigger setpoints below. Note that the normal sampling burst (64 samples/cycle, 2 cycles) used for all
metering calculations is done on top of the trace memory sampling. The harmonic analysis sampling (256 sam-
ples/cycles, 1 cycle) causes the trace memory sampling to stop for one cycle whenever a harmonic analysis is
requested. Refer to Chapter 6 for details on trace memory implementation in PQMPC.
•
TRACE MEMORY USAGE:
The trace memory feature allows the user to capture maximum of 36 cycles.
The
TRACE MEMORY USAGE
setpoint allows the buffer to be divided into maximum of 3 separate buffers as
shown in table below.
•
TRACE MEMORY TRIGGER MODE:
The trace memory can be configured to trigger in two different
modes as described in the table below.
•
Ia OVERCURRENT TRIG LEVEL:
Once the phase A current equals or increases above this setpoint
value, the trace memory is triggered and data on all inputs are captured in the buffer. The number of cycles
captured depends on the value specified in the
TRACE MEMORY USAGE
setpoint.
•
Ib OVERCURRENT TRIG LEVEL:
Once the phase B current equals or increases above this setpoint
value, the trace memory is triggered and data on all inputs are captured in the buffer. The number of cycles
captured depends on the value specified in the
TRACE MEMORY USAGE
setpoint.
•
Ic OVERCURRENT TRIG LEVEL:
Once the phase C current equals or increases above this setpoint
value, the trace memory is triggered and data on all inputs are captured in the buffer. The number of cycles
captured depends on the value specified in the
TRACE MEMORY USAGE
setpoint.
•
In OVERCURRENT TRIG LEVEL:
Once the neutral current equals or increases above this setpoint value,
the trace memory is triggered and data on all inputs are captured in the buffer. The number of cycles cap-
tured depends on the value specified in the
TRACE MEMORY USAGE
setpoint.
•
Va OVERVOLTAGE TRIG LEVEL:
Once the phase A voltage equals or increases above this setpoint
value, the trace memory is triggered and data on all inputs are captured in the buffer. The number of cycles
captured depends on the value specified in the
TRACE MEMORY USAGE
setpoint. Phase to neutral levels are
used regardless of the VT wiring.
SETPOINT VALUE RESULT
1 x 36 cycles Upon a trigger, the entire buffer is filled with 36 cycles of data.
2 x 18 cycles The buffer is split into 2 separate buffers and upon a trigger, the first buffer is
filled with 18 cycles of data and upon a second trigger, the second buffer is
filled with 18 cycles of data.
3 x 12 cycles The buffer is split into 3 separate buffers and upon a trigger, the first buffer is
filled with 12 cycles of data, upon a second trigger, the second buffer is filled
with 12 cycles of data and upon a third trigger, the third buffer is filled with 12
cycles of data.
SETPOINT VALUE RESULT
ONE SHOT The trace memory will be triggered once per buffer as defined in the
TRACE
MEMORY USAGE
setpoint above. In order for it to re-trigger, it must be re-armed
through the serial port using PQMPC or other software. Once re-armed the
trace memory will default back to the first buffer.
RETRIGGER The trace memory will automatically re-trigger upon each condition and
overwrite the previous buffer data.

GE Power Quality Meter Series Specifications

General

Brand	GE
Model	Power Quality Meter Series
Category	Measuring Instruments
Language	English