GE Energy EPM 4500 User manual

GE Energy
Industrial Solutions
Instruction Manual
Manual P/N: 1601-0157-A9
Manual Order Code: GEK-106555I
Copyright © 2010 GE Energy
GE Energy
Industrial Solutions
41 Woodford Avenue
Plainville, CT 06062
Internet: http://www.geindustrial.com
EPM 4500
SUB METER

EPM 4500 SUB METER – INSTRUCTION MANUAL TOCTOC–I
Table of Contents
1: OVERVIEW GETTING STARTED ........................................................................................................................... 1-1
DESCRIPTION ........................................................................................................................ 1-1
APPLICATIONS ................................................................................................................................... 1-2
STAND-ALONE METER ........................................................................................................ 1-2
METERING SYSTEM .............................................................................................................. 1-2
INTERIOR VIEW .................................................................................................................... 1-3
CAUTIONS AND WARNINGS ............................................................................................... 1-3
PROTECTIVE CONDUCTOR TERMINAL ............................................................................... 1-4
PREVENTIVE MAINTENANCE ............................................................................................... 1-4
SPECIFICATIONS ............................................................................................................................... 1-5
MONITORING ........................................................................................................................ 1-5
POWER SUPPLY ................................................................................................................... 1-5
METERING ............................................................................................................................. 1-5
INPUTS .................................................................................................................................. 1-6
COMMUNICATIONS .............................................................................................................. 1-6
PHYSICAL .............................................................................................................................. 1-6
TYPE TESTS AND APPROVALS ............................................................................................ 1-6
ORDERING ........................................................................................................................................... 1-8
EPM4500 RESIDENTIAL .................................................................................................... 1-8
EPM4500 COMMERCIAL ................................................................................................... 1-8
OPTIONS ...............................................................................................................................1-8
CURRENT TRANSFORMERS (0.1 A SECONDARY) ............................................................. 1-9
TRANSPONDER MODELS ..................................................................................................... 1-9
PULSE INPUTS ...................................................................................................................... 1-9
2: INSTALLATION GETTING READY ................................................................................................................................ 2-1
DETERMINATION OF METERING SYSTEM REQUIREMENTS .............................................. 2-1
PHASE ASSOCIATION ........................................................................................................... 2-1
WIRING ................................................................................................................................................. 2-2
OVERVIEW OF METER WIRING .......................................................................................... 2-2
WIRING OVERVIEW ............................................................................................................. 2-2
THREE-PHASE FOUR-WIRE WYE WIRING ....................................................................... 2-3
SINGLE-PHASE, THREE-WIRE 120 V WIRING ............................................................... 2-6
THREE-PHASE, THREE-WIRE DELTA WIRING ................................................................. 2-9
SINGLE-PHASE, THREE-WIRE WIRING ............................................................................. 2-12
INSTALLATION OF METER, MCI BOARD, AND CTS ............................................................. 2-15
PROCEDURE .......................................................................................................................... 2-15
INSTALLING THE SCAN TRANSPONDER ................................................................................. 2-18
PROCEDURE .......................................................................................................................... 2-18
3: USING THE METER MENU NAVIGATION ........................................................................................................................ 3-1
USER INTERFACE .................................................................................................................. 3-1
CT MULTIPLIER TABLE .................................................................................................................... 3-4
CT MULTIPLIERS .................................................................................................................. 3-4
VERIFYING METER FUNCTIONALITY ......................................................................................... 3-5
OVERVIEW ............................................................................................................................ 3-5

TOCTOC–II EPM 4500 SUB METER – INSTRUCTION MANUAL
VERIFYING VOLTAGE ........................................................................................................... 3-5
VERIFYING KWHREADING ................................................................................................. 3-5
VERIFYING CURRENT AND ENERGY ................................................................................... 3-6
RESETTING THE DEMAND VALUES ........................................................................................... 3-7
PROCEDURE .......................................................................................................................... 3-7
4: COMMUNICATIONS MODBUS COMMUNICATIONS ..................................................................................................... 4-1
RS485 WIRING FOR MODBUS ......................................................................................... 4-1
RS232 WIRING FOR MODBUS ......................................................................................... 4-2
MODBUS COMMANDS ......................................................................................................... 4-2
FIXED MODBUS VALUES ..................................................................................................... 4-2
MODBUS DATA REGISTER (R4 TYPE) GROUPS ................................................................ 4-3
INSTANTANEOUS DATA ITEMS ............................................................................................ 4-3
32-BIT LONG AND FLOAT DATA FORMATS ..................................................................... 4-4
MODBUS ACTIVATION .................................................................................................................... 4-5
OVERVIEW ............................................................................................................................ 4-5
CONFIGURING ANEW HYPERTERMINAL SESSION .......................................................... 4-5
CONFIRMING CONNECTION TO THE EPM4500 ............................................................. 4-6
LOGGING INTO THE METER ................................................................................................ 4-6
ACTIVATING MODBUS COMMUNICATIONS ....................................................................... 4-7
CHANGING MODBUS SETTINGS ......................................................................................... 4-8
LOGGING OUT ...................................................................................................................... 4-8
DISABLING MODBUS COMMUNICATIONS ......................................................................... 4-8
MODBUS MEMORY MAP ................................................................................................................ 4-9
MEMORY MAP ...................................................................................................................... 4-9
5: MISCELLANEOUS REVISION HISTORY .......................................................................................................................... 5-1
RELEASE DATES ................................................................................................................... 5-1
CHANGES TO THE MANUAL ................................................................................................ 5-2
WARRANTY ......................................................................................................................................... 5-4
GE ENERGY WARRANTY ..................................................................................................... 5-4

EPM 4500 SUB METER – INSTRUCTION MANUAL 1–1
EPM4500 Sub Meter
Chapter 1: Overview
GE Energy
Industrial Solutions
709710A1.CDR
Over view
1.1 Getting Started
1.1.1 Description
Thank you for purchasing the GE Energy EPM4500 24-point sub-meter to monitor energy
for your residential, commercial, or industrial applications. At GE Energy, we pride
ourselves by providing our customers with best-in-class products, which have been
carefully selected by GE to best serve your solution needs.
The EPM4500 is sold in KWh or Demand meter versions and is available for 120/208V and
277/480V applications. An integrated liquid crystal display (LCD) is standard on all versions,
providing local access to real-time and historical data. The meter provides two standard
communication modes: power line communications (PLC), which utilizes existing AC power
lines as the communication medium, eliminating dedicated wiring, and Modbus (RS232,
RS485, and modem).
The EPM4500 is packaged with either solid or split-core CTs in various amperages to suit
both new construction and retrofit applications.
Note The EPM4500 is primarily used for commercial and industrial applications and is
available in voltages ranging from 120 to 600 V in both wye and delta forms. The
following installation instructions are applicable to the EPM4500 meter only.

1–2 EPM 4500 SUB METER – INSTRUCTION MANUAL
APPLICATIONS CHAPTER 1: OVERVIEW
1.2 Applications
1.2.1 Stand-Alone Meter
The GE Energy EPM4500 can be installed as a stand-alone device that is locally accessed
via the LCD or remotely accessed via modem. A modem can be installed in each meter
allowing the meter(s) to be read remotely.
1.2.2 Metering System
The GE Energy EPM4500 family of meters are ideally designed to comprise a metering
system within a residential/commercial building or industrial site. This metering system
can measure electrical usage for each tenant, cost center, or common area space and
communicate this information over the building's power wires or dedicated
communication wiring (RS485). A metering system is comprised of two or more EPM4500
meters and at least one communication transponder (see figure below). The transponder
collects metering data from multiple meters via AC power lines. For larger sites, additional
transponders may be required. Multiple transponders can communicate via a data link
network using RS485 or via a wireless network.
The metering data can be accessed from the transponder or network of transponders
using a telephone modem or local RS232 connection to a PC for data transfers.
FIGURE 1–1: Overview of Scan Transponder Functionality
709712A1.CDR

CHAPTER 1: OVERVIEW APPLICATIONS
EPM 4500 SUB METER – INSTRUCTION MANUAL 1–3
1.2.3 Interior View
The interior of the EPM4500 is shown below.
FIGURE 1–2: Interior View of the EPM4500
Note Where the and symbols are seen on the EPM4500 meter, the manual must be
consulted to determine the nature of any potential hazard and/or actions to be taken.
1.2.4 Cautions and Warnings
• Do not install if the device is damaged. Inspect the housing for obvious defects
such as cracks in the housing.
• If the device is installed or used in a manner not specified by accompanying
documents, the protection of the device may be impaired.
• If the device functions abnormally, proceed with caution. The protection of the
device may be impaired.
• Do not install the meter around combustible gas or gas vapor.
• Do not install the meter in an electrical service with current or voltage outside of
the specified limit of the device.
• Do not operate the meter with the cover removed.
• To avoid electric shock, disconnect mains before replacing fuses!
• See instructions for connection diagram.
• Risk of electric shock. Beware of working around this meter when the voltage is
live.
• For continued protection against fire, replace only with fuses of specified voltage
and current rating.
709711A1.CDR
WARNING
CAUTION

1–4 EPM 4500 SUB METER – INSTRUCTION MANUAL
APPLICATIONS CHAPTER 1: OVERVIEW
1.2.5 Protective Conductor Terminal
Securely fasten one end of the earthing wire so that the screw cuts the paint on the back
box. Securely fasten other end of the wire to a true earth ground connection. When
earthing to the electrical conduit, use continuous pipes, bending when necessary instead
of using couplers.
1.2.6 Preventive Maintenance
There are no necessary preventative maintenance or inspection.
A Toshiba CR2032 coin battery is used in each device and is intended to be good for
decades before replacement. Return to manufacturer for replacement.

CHAPTER 1: OVERVIEW SPECIFICATIONS
EPM 4500 SUB METER – INSTRUCTION MANUAL 1–5
1.3 Specifications
1.3.1 Monitoring
DEMAND
Consumption and demand: .....................kW and kWh
Demand reset: .................................................allows local reset of peak demand register
INTERVAL DATA AND PEAK DEMAND
Commercial:......................................................15 minute block demand interval and peak demand with
date and time stamp
Residential:........................................................1 hour block demand interval
DATA LOGGER
Duration:.............................................................120 days with kW and kWh
Battery:................................................................internal battery maintains time and current interval
metering data during power outage only
1.3.2 Power Supply
CONTROL POWER
Input:....................................................................120 V phase A to neutral
277 V phase A to neutral
480 V phase to phase
(internally powered through metered voltage; no external
source is required)
Frequency:.........................................................50 to 60 Hz
Operating power: ...........................................2 watts for 120 V
5 watts for 277 V and 480 V
Fuses:...................................................................1 - Buss fuse 250 V / 500 V 0.25 A / 0.125 A slow-acting
3 - Buss fuse 250 V /600 V 4.0 A fast-acting
1.3.3 Metering
MEASURED VALUES
Real time per phase:.....................................voltage, current, kW, kvar, kVA, power factor, frequency,
phase angle
Data logging:....................................................kWh, kW demand
METER ACCURACY
Accuracy: ...........................................................0.5 class accuracy
±0.5% unity and 50% power factor, 1 to 100% of full-
scale
Standards: .........................................................meets revenue certifiable ANSI C12.1 and C12.16
accuracy standards
LIQUID CRYSTAL DISPLAY (LCD)
Display size:.......................................................32-digit LCD, 16 digits in two rows
Data digit height:............................................0.31"
Consumption register: .................................6 digits

1–6 EPM 4500 SUB METER – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: OVERVIEW
1.3.4 Inputs
AC CURRENT INPUTS
CT input:..............................................................50 to 800 A primary available
Secondary inputs: ..........................................0.1 A or 5 A
AC VOLTAGE INPUTS
Metered voltage:.............................................120/208 V wye, 277/480 V wye, or 600 V delta
at 50 to 60 Hz
Rated voltage:..................................................90 to 110%
PULSE INPUTS
Inputs:..................................................................up to 48 form-A pulse inputs logged in programmable
intervals also count during power outage
Minimum wire gauge:...................................20 AWG
Maximum wire length: .................................300 ft.
Maximum rate: ................................................5 transitions/second
Minimum pulse width:..................................100 ms
1.3.5 Communications
EPM4500 COMMUNICATIONS
Protocols:............................................................Power line communications (PLC)
RS485 Modbus (2-wire, half-duplex, isolated)
Ports: ....................................................................IEC front optical point-of-access (POA) port
1.3.6 Physical
ENVIRONMENT
Usage:..................................................................For indoor use only
Enclosure:...........................................................NEMA 1 rated
Temperature:....................................................–20°C to +60°C
Humidity:............................................................0 to 95% relative humidity (non-condensing)
Pollution degree:.............................................1
Maximum altitude:.........................................2000 m
DIMENSIONS
Meter enclosure:.............................................13.5"H ×8.5"W ×4.5"D
CT terminal board enclosure: 13.5"H ×8.5"W ×4.5"D
SHIPPING
Shipping weight: .............................................1 meter assembly 34 lbs. (total weight)
Shipping dimensions: ...................................2 enclosures, each 13.5"H ×8.5"W ×4.5"D
1.3.7 Type Tests and Approvals
TYPE TESTS
Transient/surge suppression: ANSI C37.90.1-1989
Installation category:....................................III. This product falls under Installation Category III
because of its distribution level, fixed installation and has
smaller transient overvoltages than an Installation
Category IV.