4–16 PQM POWER QUALITY METER – INSTRUCTION MANUAL
S1 PQM SETUP CHAPTER 4: PROGRAMMING
• 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 captured 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
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 EnerVista PQM Setup 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.
Courtesy of NationalSwitchgear.com
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