1-4
PQM Power Quality Meter
GE Power Management
1.2 STANDARD FEATURES
1 OVERVIEW
1
1.2 STANDARD FEATURES
1.2.1 METERING
True RMS monitoring of
I
a
,
I
b
,
I
c
,
I
n
,
V
an
,
V
bn
,
V
cn
,
V
ab
,
V
bc
,
V
ca
, voltage/current unbalance, power factor, line
frequency, watts, vars, VA, Wh, varh, VAh, and demand readings for A, W, vars, and VA. Maximum and mini-
mum values of measured quantities are recorded and are date and time stamped.
A 40-character display with brightness control is used for programming setpoints and monitoring values and
status.
a) ALARMS
Alarm conditions can be set up for all measured quantities. These include overcurrent, undercurrent, neutral
current, current unbalance, voltage unbalance, phase reversal, overfrequency, underfrequency, power factor,
switch inputs, etc. The alarm messages are displayed in a simple and easy to understand English format.
b) COMMUNICATION
The PQM is equipped with one standard RS485 port utilizing the Modbus or DNP 3.0 protocols. This can be
used to integrate process, instrumentation, and electrical requirements in a plant automation system by con-
necting PQM meters together to a DCS or SCADA system. A PC running PQMPC can change system set-
points and monitor values, status, and alarms. Continuous monitoring minimizes process downtime by
immediately identifying potential problems due to faults or changes from growth.
The PQM also includes a front RS232 port which may be employed to perform such tasks as:
•
data monitoring
•
problem diagnosis
•
viewing event records
•
trending
•
printing settings and/or actual values
•
loading new firmware into the PQM
1.2.2 FUTURE EXPANSION
Flash memory is used to store firmware within the PQM. This allows future product upgrades to be loaded via
the serial port.
Figure 1–3: DOWNLOADING PRODUCT ENHANCEMENTS VIA THE SERIAL PORT
PQM units can initially be used as standalone meters. Their open architecture allows connection to other Mod-
bus compatible devices on the same communication link. These can be integrated in a complete plant-wide
system for overall process monitoring and control.
SIMULATION
ALARM
STATUS
SELF TEST
PROGRAM
TX2
TX1
COMMUNICATE
RX2
RX1
AUX2
ALARM
RELAYS
AUX3
AUX1
823774A5.CDR
Transfer new firmware
to the PQM
Product update
from GE Power
Management
CD-ROM
PQM Windows Application - PQM
For Help, press F1
Seconds (Elapsed Time)
SIMULATION
ALARM
STATUS
SELF TEST
PROGRAM
TX2
TX1
COMMUNICATE
RX2
RX1
AUX2
ALARM
RELAYS
AUX3
AUX1
PQM
Power Quality Meter
Summary of Contents for Power Quality Meter Series
Page 2: ......
Page 4: ......
Page 10: ...vi PQM Power Quality Meter GE Power Management TABLE OF CONTENTS ...
Page 46: ...2 22 PQM Power Quality Meter GE Power Management 2 2 ELECTRICAL 2 INSTALLATION 2 ...
Page 56: ...3 10 PQM Power Quality Meter GE Power Management 3 4 DEFAULT MESSAGES 3 OPERATION 3 ...
Page 166: ...6 20 PQM Power Quality Meter GE Power Management 6 6 POWER ANALYSIS 6 SOFTWARE 6 ...
Page 274: ...B 4 PQM Power Quality Meter GE Power Management B 1 TABLES AND FIGURES APPENDIXB B ...
Page 276: ...C 2 PQM Power Quality Meter GE Power Management C 1 PQM WARRANTY APPENDIXC C ...
Page 281: ...GE Power Management PQM Power Quality Meter NOTES ...