GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 63)

Power Management Control System
Appendix A – IED Descriptions
53
All voltage, current, power, and energy readings are
true RMS, including harmonics. Energy readings
provide bi-directional (import/export) indication.
No potential transformers (PTs) are required on the
voltage inputs for systems up to 347 Vac line-to-
neutral/600 Vac line-to-line. For higher voltage systems,
PTs with 120 Vac secondaries may be used. The
transformer-coupled current inputs provide 300 A surge
protection and accept CTs with 5 A full-scale outputs.
Electronic Power Meter EPM 3720
The Electronic Power Meter 3720 offers the same
capabilities as the EPM 3710, plus many additional
measurements and more advanced features, including
the following:
• Three-phase voltage inputs
• Three-phase current inputs
• Neutral/ground current input
• Three relay outputs
• Four digital inputs with pulse-counter on all four
inputs with maximum pulse count frequency of
10 Hz
• One analog voltage input, one analog current
output
• 729 measured parameters, including harmonic
distortion and demand
• Waveform-capture triggering communications
port or setpoint
• Waveform-recording triggering communications
port or setpoint
• Eight programmable trend logs, 12 parameters
each, 11,520 record capacity (40 days), triggered
by time interval or setpoint
• Event log with 100 records standard, resolution
one second
• Minimum/maximum logs: one preset with over
100 parameters; 16 programmable logs of 16
parameters each with a trigger parameter for
each log
• 17 setpoints: 11 standard-speed, six high-speed;
trigger event log, relay control, snapshot log,
waveform capture or waveform recorder
The Electronic Power Meter 3720 provides hundreds of
high-accuracy real-time measured parameters, as well as
minima, maxima, and status parameters.
All voltage, current, power, and energy readings are
true RMS and sensitive to beyond the 50
th harmonic.
Four-quadrant readings measure bidirectional
(import/export) energy flow, useful in any
cogeneration application.
No PTs are required on the voltage inputs for systems
up to 347 Vac line-to-neutral and 600 Vac line-to-line.
For higher-voltage systems, PTs with 120 Vac
secondaries may be used. The transformer-coupled
current inputs provide 300 A surge protection and
accept CTs with 5 A full-scale outputs.
Electronic Power Meter EPM 7300
The Electronic Power Meter 7300 provides over 100
high-accuracy, three-phase measurements. Its compact
size, simple installation and high reliability make it
ideal for use in panelboards, switchboards, switchgear,
gensets and UPS systems. With RS-485 communications,
it can be integrated into a power management system
such as PMCS.
Instantaneous Measurements
• Voltage (l-l/l-n), per phase and average
• Current, per phase and average
• Real Power, per phase and total
• Reactive Power, per phase and total
• Apparent Power, per phase and total
• Power Factor, (lead/lag), per phase and total
• Voltage Unbalance
• Current Unbalance
• Frequency
Energy
• Imported, exported, absolute and net kWh &
kVARh. Accumulated kVAh
Demand
• Sliding Window, Predicted, and Thermal
Demand on kW, kVAR, kVA, and I average
Minimums and Maximums
• Voltage (l-l/l-n) per phase
• Current per phase
• kW, kVAR, kVA, Power Factor, Frequency
• Sliding Window Demand for kW and kVA
Electronic Power Meter EPM 7500/7600/7700
The EPM 7500/7600/7700 is a highly advanced digital
power meter, suited to virtually any power monitoring
and control application. This Intelligent Electronic
Device (IED) can take the place of numerous
transducers, meters and control circuits in a power
monitoring system. The EPM 7700 provides true RMS