Voltage Phase Reversal and Imbalance | GE EPM 5300, EPM 5200

VOLTAGE PHASE REVERSAL AND IMBALANCE

CHAPTER 5: OVERVIEW

5.9Voltage Phase Reversal and Imbalance

In a three-phase power distribution system, normal phase shift between each line is 120°. If the EPM 5300P detects an abnormality, it displays a message of PH. The EPM 5200P does not have this feature.

VOLTAGE PHASE REVERSAL: If there is an incorrect connection, such as mistaking line A for line B, a PH message appears. The correct sequence is a-b-c.

VOLTAGE PHASE IMBALANCE LIMIT: This is detected using the phase imbalance limit in the Programming Mode. The phase imbalance is expressed as a percentage, with 0% indicating a 120° phase shift between each line. A PH message appears if the limit is exceeded.

	MAX	AC VOLTS
	MAX	A B C A B C
	MIN	N N N B C A
	LM1	N N N B C A
	LM1
	LM2	AC AMPS
		AC AMPS
		A B C N
		POWER

			PF
			KW
			KVA
KVAH	KWH	FREQ	KVAR
MAX/MIN	VOLTS AMPS	POWER PHASE
LIMITS			NEXT

	MAX	AC VOLTS
	MAX	A B C A B C
	MIN	A B C A B C
	MIN	N N N B C A
	LM1	N N N B C A
	LM1
	LM2	AC AMPS
		AC AMPS
		A B C N
		POWER

			PF
			KW
			KVA
KVAH	KWH	FREQ	KVAR
MAX/MIN	VOLTS AMPS	POWER PHASE
LIMITS			NEXT

	MAX	AC VOLTS
	MAX	A B C A B C
	MIN	A B C A B C
	MIN	N N N B C A
	LM1	N N N B C A
	LM1
	LM2	AC AMPS
		AC AMPS
		A B C N
		POWER

			PF
			KW
			KVA
KVAH	KWH	FREQ	KVAR
MAX/MIN	VOLTS AMPS	POWER PHASE
LIMITS			NEXT

MAX			AC VOLTS
MAX			A B C A B C
MIN			A B C A B C
MIN			N N N B C A
LM1			N N N B C A
LM1
LM2			AC AMPS
			AC AMPS
			A B C N
			POWER
			PF
			KW
			KVA
KVAH	KWH	FREQ	KVAR
MAX/MIN	VOLTS AMPS	POWER PHASE
LIMITS			NEXT

Step 1:	Step 2:	This display indicates a	This display indicates a
a. Press and hold down	a. Press PHASE/NEXT to	Voltage Phase Reversal.	Voltage Phase Imbalance.
a. Press and hold down	a. Press PHASE/NEXT to
PHASE/NEXT. While	select zero.
holding down PHASE/
NEXT, press AMPS to
access the display.
(PH indicates both
Voltage Phase Reversals
and Voltage Phase
Imbalances.)

In the event Voltage Phase Reversal and Voltage Phase Imbalance occur simultaneously, the display alternates between the incorrect phase sequence and the exceeded limit percentage. After six seconds the display returns to the normal operating mode.

5–40	EPM 5300 SERIES ADVANCED POWER METERS – INSTRUCTION MANUAL

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GE EPM 5300, EPM 5200, EPM 5350 Voltage Phase Reversal and Imbalance, This display indicates a, Press and hold down

Contents

EPM 5300 Power Metering System Chapter GE MultilinPage Table of Contents Programming 111 112113 114 Table of Contents TOC-IV EPM 5300 Series Meters AC Power Measurement Single Phase System Power W in a single phase system is = E I cosΘ Three-Phase System Delta Wye Poly Phase System 1 Delta, 2 Wye Consumption, Demand and Poor Power Factor Consumption WH = W ⋅ T Waveform and Harmonics Sin ω ⋅ t EPM 5300 Series Meters Mechanical Installation Mechanical Installation Installation with K-110 option for limited space conditions Port Mechanical Installation Connecting the Current Circuit EPM 5300 Series Meters Electrical InstallationFeet CT Connection Option 1 Isolating a CT Connection Reversal power readingHelpful Debugging Tools Connecting the Voltage Circuit Selecting the Voltage Fuses Connection to the Main Power Supply Externally fuse power supply with a slow-blow 3 Amp fuse Electrical Connection Installation List of Connection Diagrams Line Load Back View Line Back View B C Load Line B C Back View Load Single Phase with CT and PT Connection EPM 5300P-S Line Relay, Protection and Pulse Output EPM 5300P Relay Overview2 2 Relays & 1 KYZ Pulse Output -NL Option This section applies only to the -NL or -NL2 Relay Option Close-up of the Relay and KYZ pulse output on the rear panel Standard Rate Table for Watts KYZ Pulse Outputs NL2 Option Standard Rate Table for Watts KYZ Pulse Outputs NL2 Option EPM 5300 Series Meters Communication Installation RS-232C RS-485 Hookup Diagram 2 wire Half Duplex RS-485 RS-485 Hookup Diagram 2 wire Half Duplex Closed Loop RS-485 Hookup Diagram 4 wire Full Duplex Connecting 4-Wire bus to RS-485 Port RS-485 Hookup Diagram 4 wire Full Duplex Detail View Network of Instruments and Long Distance Communication You may want to use a Modem Manager RS485-RS232 Converter Programming the Modem Modem Connected to Computer Originate ModemModem Connected to the Device Remote Modem Tell modem to write the new settings to activate profile Debugging Communication Problems EPM 5300 Series Meters Overview Freq± Total KWH Total Kvah N/A on EPM 5200P EPM 5300P front panel with display and keypad Press Power to select the power category Accessing the Power FunctionsSequence Accessing Voltage and Current Phases Press PHASE/NEXT for the desired phase Accessing %THD Functions Display blanks and indicates the %THD value momentarily Viewing Individual Phase Indication for Power Functions Accessing Max/Min Values Phase Resetting Values Unprotected ResetTo reset the min of Amps a Repeat this procedure for each value you wish to reset Protected Reset Password is Resetting Hour Readings Press Power onceTime a password digit Appears While the question Accessing the LM1/LM2 Set Limits To view the setup of the LM1/LM2 set limitsTo access the set limit To locate readings that exceeded Limit Voltage Phase Reversal and Imbalance Voltage Phase ReversalThis display indicates a Press and hold down Access Modes Enter Programming Mode see Programming SectionPrint Operating Data Print Programming Data Print Operating Data Press and hold PHASE/NEXTMiddle display Release both buttons Print Programming Data Accessing Firmware Version/LED Test Step Press and hold PHASE/NEXT General Procedure EPM 5300 Series Meters Programming Overview Switch Packs GROUPS, Functions, and Switch Packs Programming Mode Data Entry Point from Function and Group levelPosition UP or Down Activates new data entry and enters or exits from Standard Numeric Data Entry EPM 5300 Series Meters EPM 5200P EPM 5200P EPM 5300P vs EPM 5200P vs EPM 5350P VA/HR EPM 5300 Series Meters Entering Programming Mode Checksum Error-Protective Self-Checking Algorithms Password Entry Entering Programming ModeIf 3 is not already displayed Press Amps until 3 appears Flashes momentarily in middle display System Configuration see Table Relay 1 Set-up / Time delayRelay 2 Set-up / Time delay Number of Phases Enter Group Level of Programming Mode see Chp Lower display indicates current Interval settingGroup 0, Function 0-The Integration Interval Press Amps to activate the Group Programming Group 0 Global Meter Setup To change the Meter Address Group 0, Function 2 Baud Rate Group 0, Function 3 System Configuration Group Function Pack Open Delta System Installation Programming Programming Group 0 Global Meter Setup Modbus Plus Capability Printing Option Group 0, Function 3-Programming Procedure To change the System Configuration Switch Settings Relay Mode Programming Steps Enter in Group 0, Function 4, Pack ‘p’, Segments C and D LI M IT S To change Time Delays Relay 1 On to Off Delay TimeRelay 1 Off to On Delay Time Relay 2 On to Off Delay Time To program Relay 2 To perform the KYZ Parameter Selection Group 0, Function 6-KYZ Parameter SelectionKYZ Parameters Enter Group Level of Programming Mode see Chp Applies to -NL2 Option only How to Use KYZ Pulse Value Table for MultiplicationKYZ Pulse Value How to Use KYZ Pulse Value Table for Division Selection is Multiply by To change the KYZ pulse value Group 0, Function 7-Number of Phases Enter 2 for single phase/two wireEnter Group Level of Programming Mode. Chapter Press Amps to activate the Group Appears in upper display Formulas Typical Full Scale Settings for Volts Group 1, FunctionVoltage Full Scale Group 1 Programming Format Press Amps to activate Group Appears in upper display Press MAX/MIN/LIMITS until 1. appears in upper displayPress Volts to move decimal point Press Amps to store 10-76 To change the Full Scale Settings Full Scale Settings for Amps Entering the Scale Factor Decimal Point Selection Step Press Amps to begin Data Entry Sequence Scale Selection and Decimal Placement for Watts To change the scale factor setting for wattage Display Entering the Scale Factor Step 10-82 EPM 5300 Series Meters Programming Group 2 Meter Calibration Calibration Requirements Group 2 Programming FormatHigh End Calibration-Volts AN, BN, CN High End Calibration-Amps A, B, C Group 2, Functions To change the calibration high end-Functions 0 For Amps Low End Function Group 2, Functions 11-87 11-88 EPM 5300 Series Meters Groups 4, 5 Set Limits Relays LM1 and LM2 SET Limits Trip Relay Time Delays & Relay Mode Group 4 Functions 0-3-LM1/LM2 Set Limits V O L T S A M P S Group 4 Programming Format for Limit Condition Group 4 Programming FormatGroup 4 Functions Group 4 Example for Function Group 5 Functions 0-7-LM1/LM2 Set Limits There are 3 switches to set with limitsGroup 5 Programming Format for Limit Condition Special Cases Group 5 FunctionsGroup 5 Example for Function Digit Up Digit Down 0120 Group 6 Programming Format For THD Limit Conditions Group 6 LM1/LM2 Set LimitsGroup 6 Functions Group 6-Example for Function Digit Up Digit Down 012.0 Limits or Relays Programming Procedure Group Press Amps once to Disable the Limit Limits or Relays Programming Procedure 12-100 Phase Reversal and Phase Imbalance Phase Imbalance Trip Relay Level ENABLE/DISABLE Group 7, Function 0-Voltage Phase Reversal Detection To change the phase reversal settingVoltage Phase Reversal Detection Voltage Phase Imbalance 13-104 Group 7, Function 1-Percentage Voltage Phase Imbalance To change the percentage voltage phase imbalance Middle and lower displays indicate new settings EPM 5300 Series Meters Exiting Programming Mode Exiting Programming Mode Meter returns to Function Level Press Amps to exit from Function Level to Group Level Entering the Programming Mode EPM 5300 Series Meters Programming Quick Reference Data Entry Sequence Group 0 Global Meter Setup Programming Groups Group 1 Full Scale Setup On to OFF delay time OFF to on delay timeVolts Full Scale Currents Full Scale Power Full Scale Group 2 Calibration Group 5 Power Function Limits Group 3 Calibration RatiosGroup 4 Volt/Current Limits Group 6 THD Limits Group 8 DC output Calibration Group 7 Imbalance/Reversal LimitsDetect Reversal Imbalance percent Limit 89L. Low-End Calibration 89H. High-End Calibration ⎯ Scroll Groups⎯ Scroll Functions ⎯ Scroll Packs 15-116 EPM 5300 Series Meters Ethernet Option Ethernet Module Ethernet Option Setup AutoIP Network Port Login Network ConfigurationARP on Unix Telnet to Port Configuration Parameters Baud Rate