EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 2–1
EPM 9450/9650
Chapter 2: Meter Overview
GE
Grid Solutions
Meter Ove rview
This chapter provides basic information on the EPM 9450/9650 meter.
2.1 The EPM 9450/9650 System
GE Digital Energy’s EPM 9450/9650 meter combines high-end revenue metering with
sophisticated power quality analysis. Its advanced monitoring capabilities provide detailed
and precise pictures of any metered point within a distribution network. The P40N
PLUS
LED
display and P60N LCD touch-screen display are detailed in Chapter 6. Extensive I/O
capability is available in conjunction with all metering functions. The optional GE
Communicator software allows a user to poll and gather data from multiple EPM meters
installed at local or remote locations (see the GE Communicator Instruction Manual for
details). On board mass memory enables the meter to retrieve and store multiple logs. The
EPM 9450/9650 meter with Internal Modem (or Network) Option connects to a PC via
standard phone line (or MODBUS/TCP) and a daisy chain of EPM meters via an RS485
connection. See Chapters 10 and 11 for details.
EPM 9450/9650 Revenue Metering
• Delivers laboratory-grade 0.04% Watt-hour accuracy (at full load Unity PF) in a
field-mounted device
• Auto-calibrates when there is a temperature change of about 2 degrees Celsius
• Meets all ANSI C-12.20 and IEC 62053-22 accuracy specifications
• Adjusts for transformer and line losses, using user-defined compensation factors
• Automatically logs time-of-use for up to eight programmable tariff registers
• Counts pulses and aggregates different loads
EPM 9450/9650 Power Quality Monitoring
• Records up to 512 samples per cycle on an event
• Records sub-cycle transients on voltage or current readings
• Measures and records Harmonics to the 255th order (Real Time Harmonics to the
128th order)
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