High Performance Power Quality Metering with Advanced Logging and Communications

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The Multilin™ EPM 9700 is a high performance power quality meter with advanced logging capabilities and flexible communication options. As a member of GE’s EPM meter family, the EPM 9700 provides a comprehensive picture of power quality and consumption for metered points within an electrical system, empowering users to make power related analysis and decisions quickly and effectively, as well as recording data for accurate reconciliation. Its versatile transducer and display installation, along with comprehensive and innovative metering and communication features are ideal for utility, industrial and commercial power quality applications.

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EPM 9700 Overview

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The EPM 9700 is ideal for revenue and power quality monitoring in a variety of applications, including utility substations, renewables, advanced industrial manufacturing, datacenters and hospitals. It provides a number of key features and benefits, as outlined below.

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• Updated IEC 61000-4-30 Class A Edition 3 Power Quality Measurement and EN50160 Reporting Support

• High resolution waveform recording (up to 1024 samples/cycle) and high accuracy 0.06% watt-hour energy metering with demand and time of use capture

• Improved metrology uses high and low gain sensors for high 0.06% accuracy as well as installation flexibility using both 1A and 5A secondary CTs

• Large 1.2GB logging memory makes it possible to log years of captured data

• Easy integration with standard 6 ports (4 serial/2 Ethernet) of flexible communications options and protocol support for simultaneous Modbus and DNP3 communications

• Post installation upgradeable for future requirements with modular communications external I/O and software option functionality upgrades

• Separate meter unit and optional display for flexible and easy installation

• Direct upgrade for EPM 9450/9650 with same wiring/cutout for meter unit/display installation

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Accurate Revenue Energy Metering

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The EPM 9700 uses advanced high and low gain current sensors for each of the current inputs and determines the optimal sensing circuit for the highest accuracy measurement. This allows the EPM 9700 to have 0.06% accuracy (ANSI Class 0.2%) in an extended measurement range. The wide range pickup of the meter current sensors used also allow the same meter to be used for both 5A and 1A secondary CTs which allows for easier ordering and standardization for multiple applications.

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IEC 61000-4-30 Class A Edition 3 Power Quality Meter

• Designed specifically to meet rigorous updated IEC 61000-4-30 Class A Edition 3 standard, the EPM 9700 measures and analyzes power quality metrics precisely

• Reporting available via auto generated EN50160 weekly reporting format

 

IEC 61000-4-15 Class A Flicker Meter

• Flicker measurements compliant with the IEC 61000-4-15 Class A standard

• Operates on both 220 volt/50 Hz and 120 volt/60 Hz

 

IEC 61000-4-7 Class A Harmonic and Inter-harmonic Analysis

• View harmonic magnitudes to the 511th order for each voltage and current channel

• Harmonic magnitudes and phase angles in real time are resolved to the 127th order

• Obtain %THD, TDD, and K-Factor

• Conduct power quality analysis at the high end of the harmonic magnitude spectrum

 

Waveform Recording

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To troubleshoot, remedy and predictively analyze potential system challenges, the EPM 9700 can record waveforms at a sampling rate up to 1024 samples/cycle on multiple power quality events, such as surges and/or sags.

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The 16-bit A/D conversion provides precise waveform resolution. Both voltage and current recording offer pre and post-event analysis. Fault recording offers 8 times full-scale capture capability. Both hardware and software triggers are available. GE Communicator setup software as well as the EPM 9700 web server provides easy remote setup as well as visualization of waveform data.

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Comprehensive Automated Data Logging

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The EPM 9700 meter provides advanced data logging capabilities over time, for trending and analysis. The meter has up to 1.2 GB allocated to logging and user storage, and is also preconfigured to automatically store 142 different measurements (in the CORE™ log) every 15 minutes, without any user intervention. Additionally, a user is able to configure up to 8 historical logs. All logs work with a FIFO buffer and roll over when filled. The EPM 9700 logs important system events such as resets, programming changes, password access changes, time changes power up/down and change of firmware.

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• Trending Log: The meter supports up to eight historical, trending logs of 64 data channels per log, acting as a traditional load profile recorder with up to 8 separate logs.

• System Events Security Log: This comprehensive system anti-tampering log records all system events in the meter along with an associated timestamp.

• Control Output Log: This log provides a time-stamped record of relay output changes.

• Input Status Change Log: This log supplies information on the state of the meter’s eight high-speed inputs.

• Limit Log: The Limit/Alarm log can be set to record on high and low conditions for up to 32 user programmable limits.

• Power Quality Log: This log captures power quality events, such as surges and sags, and lets you view and analyze the data through power quality graphs, such as the ITI CBEMA Curve standard.

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Extensive Communications and I/O

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The EPM 9700 meter is equipped with extensive communication capabilities that allow it to speak with many different SCADA or other communication systems, simultaneously. The meter has 6 communication ports as a standard offering. These ports include 4 serial ports and 2 Ethernet-based communication ports. The Ethernet ports include an ST terminated fiber optic port and an RJ45 port. Both ports use separate IP addresses, so that they can run on simultaneous redundant networks.

 

Details of Ports:

• 6 standard Com ports.

  • 4 serial ports - RS485 (one of the ports is RS485/RS232 selectable)

  • 2 independent Ethernet ports - RJ45 and Fiber Optic

• Modbus RTU, Modbus ASCII, Modbus TCP/IP, DNP 3.0 Level 2 communication

• All ports can be communicating simultaneously

• Each Ethernet port can be assigned a separate IP address

 

8 Built-in Digital High-speed Status Inputs:

• Inputs automatically sense whether the circuit is externally wetted

• If externally wetted, input up to 150 VDC is accepted

• If internally wetted, the meter supplies the necessary voltage for the control application

 

VAUX Input:

• Neutral to ground or aux voltage readings

• Synchronizing schemes, for example, obtaining the frequency, magnitude, and phase angle on both sides of a switch or between generator and bus voltage

 

Two Standard Pulse Outputs:

• Solid State, form-A, 35 ohm max on resistance

• 120 mA continuous, 350 mA max for 10 ms

• Peak voltage: 350 V DC

• Switching rate max: 10/s

• Support pulse-counting applications

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WebView Energy Dashboard

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The EPM 9700 supports direct remote Energy and Power Quality Data visualization through an enhanced HTML 5 based web server which provides response formatting, browser based access on a multitude of devices including tablets, phones and workstations. The enhanced web server eliminates the need for additional hardware and/or software to access data on the particular meter remotely.

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The visualization includes an Energy Dashboard providing users with easy to understand graphical real time data, as well as to analyze stored historical logs, alarms, and waveform records.

Using the WebView™ Energy Dashboard, the user is able to navigate easily through multiple webpage views, to view a multitude of detailed information on energy usage and power quality such as:

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• Detailed charts and graphical trending of real time energy, voltage and current readings to compare past and present values

• Energy usage including tables for demand and usage along with quadrant energy charts

• Phasor readings and a graphical phasor chart

• Waveform event records, including functionality for zoom and pan for detailed visualization and analysis

• Short term (Pst) and Long term (Plt) Flicker readings

• Detailed information for status of digital inputs, KYZ accumulators/aggregators.

• Detailed log information/status

• Meter and diagnostic Information for meter applications and troubleshooting

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