Standard Features; Metering; Future Expansion - GE Power Quality Meter Series Instruction Manual

1.2 STANDARD FEATURES

1.2 STANDARD FEATURES
1
True RMS monitoring of I
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
Flash memory is used to store firmware within the PQM. This allows future product upgrades to be loaded via
the serial port.
Product update
from GE Power
Management
CD-ROM
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.
1-4
, I , I , I , V , V , V , V
a b c n an bn cn
PQM Windows Application - PQM
Seconds (Elapsed Time)
For Help, press F1
PQM Power Quality Meter
, V , V , voltage/current unbalance, power factor, line
ab bc ca
Transfer new firmware
to the PQM
1 OVERVIEW

1.2.1 METERING

1.2.2 FUTURE EXPANSION

PQM Power Quality Meter
STATUS STATUS COMMUNICATE COMMUNICATE RELAYS RELAYS
ALARM ALARM TX1 TX1 ALARM ALARM
RX1 RX1 AUX1 AUX1
PROGRAM PROGRAM
SIMULATION SIMULATION TX2 TX2 AUX2 AUX2
SELF TEST SELF TEST RX2 RX2 AUX3 AUX3
823774A5.CDR
GE Power Management