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Table of Contents

Chapter 1 Introduction............................................................................................ 1

About This Manual.......................................................................................................... 1

About The EM720........................................................................................................... 1

Chapter 2 Installation ............................................................................................. 3

Mechanical Installation ................................................................................................... 3

Electrical Installation....................................................................................................... 5

Primary electrical installation ....................................................................................................5

Voltage Inputs...........................................................................................................................6

Current Inputs...........................................................................................................................6

Signal Ground Input..................................................................................................................6

Connectors location..................................................................................................................6

Typical Installation ....................................................................................................................7

Wiring Configurations ...............................................................................................................8

Input / Output ports options.......................................................................................................12

Communications options ..........................................................................................................14

Auxiliary Power Supply .............................................................................................................18

Location of Modules..................................................................................................................19

Chapter 3 Communications .................................................................................... 20

Chapter 4 Replacing the Battery............................................................................. 21

Appendix: Technical Specifications ........................................................................ 22

Inputs Ratings................................................................................................................. 22

Power Supply ................................................................................................................. 24

Input/Output ports ........................................................................................................... 24

Communication ports...................................................................................................... 25

Console Display Unit ...................................................................................................... 26

Real Time Clock ............................................................................................................. 26

Log Memory.................................................................................................................... 26

Environmental Conditions............................................................................................... 26

Construction ................................................................................................................... 26

Standards Compliance ................................................................................................... 27

Measurement Specifications........................................................................................... 28

Содержание expertmeter EM720

Страница 1: ...EM720 POWER QUALITY AND REVENUE METER Installation Manual BG0450 Rev A4 ...

Страница 2: ... read the instructions in this manual before performing installation and take note of the following precautions 1 Ensure that all incoming AC power and other power sources are turned OFF before performing any work on the instrument Failure to do so may result in serious or even fatal injury and or equipment damage 2 Before connecting the instrument to the power source check the labels on the front...

Страница 3: ...al Installation 7 Wiring Configurations 8 Input Output ports options 12 Communications options 14 Auxiliary Power Supply 18 Location of Modules 19 Chapter 3 Communications 20 Chapter 4 Replacing the Battery 21 Appendix Technical Specifications 22 Inputs Ratings 22 Power Supply 24 Input Output ports 24 Communication ports 25 Console Display Unit 26 Real Time Clock 26 Log Memory 26 Environmental Con...

Страница 4: ...lta Connection Using 3 CTs Wiring Setup 4LL3 or 4Ln3 11 Figure 13 Digital Input Connection 12 Figure 14 2DI 2DO Connection 13 Figure 15 Infrared Communication port COM1 14 Figure 16 GSM GPRS Communication port COM2 14 Figure 17 Serial Communication Network Connection RS 485 COM3 15 Figure 18 Serial Communication Connection RS 232 COM3 16 Figure 19 10 100BT Ethernet RJ45 Connection 16 Figure 20 Min...

Страница 5: ...i tampering and self test functions State of the art Power Quality Recorder onboard PQ analyzer according to EN50160 programmable thresholds and hysteresis ready for use reports sags swells interruptions frequency variations flicker temporary overvoltages transient overvoltages voltage unbalance harmonic and interharmonics voltages Digital Fault Recorder onboard fault detector programmable fault t...

Страница 6: ...ol setpoints pulse counters and Energy TOU subsystem DO 2 Relay outputs mechanic or solid state relay unlatched latched and pulse operations failsafe operation for alarm notifications programmable pulse width direct remote relay control through communications Communications Options The EM720 has extensive communications capabilities Infrared port Modbus RTU ASCII and DNP3 0 protocols Versatile RS ...

Страница 7: ...Chapter 2 Installation 3 Chapter 2 Installation 1 Installation Mechanical Installation Refer to the figures provided in this section to properly perform the mechanical installation Figure 1 Dimensions ...

Страница 8: ...4 Chapter 2 Installation Figure 2 Wall mount dimensions ...

Страница 9: ...ont cover then install the memory backup Lithium Battery backup MBB and Battery Pack Backup Power Supply BPS Figure 3 Memory Backup Lithium Battery and Battery Pack Installation Before installing the instrument ensure that the Battery Pack Backup Power Supply BPS is connected The BPS must be charged for a period of 16 consecutive hours before the installation Charging the BPS connect the instrumen...

Страница 10: ...ere are 4 current inputs up to 50A connected to external CT s via Main Terminal Block Copper wiring 2 5 6 mm2 10 AWG should be used Signal Ground Input For Transient measurements connect Signal Ground SG Input to Ground via Main Terminal Block if voltage neutral is isolated Copper wiring 2 5 6 mm2 10 AWG should be used If voltage neutral is grounded the Signal Ground Input should be connected to V...

Страница 11: ...Chapter 2 Installation 7 Typical Installation Figure 5 Typical Electrical Installation ...

Страница 12: ...4Ln3 or 4LL3 7 4 wire WYE 3 element connection using 3 PTs 3 CTs 4Ln3 or 4LL3 8 3 wire 2 element open delta connection using 2 PTs 2 CTs 3OP2 9 4 wire WYE 2 element connection using 2 PTs 3 CTs 3Ln3 or3LL3 10 3 wire 2 element open delta connection using 2 PTs 3 CTs 3OP3 11 4 wire 3 element delta using 3 CTs 4Ln3 or 4LL3 12 Table 1 Wiring Configuration See parameter setup instructions in the Operat...

Страница 13: ...Chapter 2 Installation 9 Figure 7 Four Wire WYE Connection Using 3 4 CTs Wiring Setup 4LL3 or 4Ln3 Figure 8 Four Wire WYE Connection Using 3 PTs 3 4 CTs Wiring Setup 4LL3 or 4Ln3 ...

Страница 14: ...llation Figure 9 Three Wire Open Delta Connection Using 2 PTs 2 CTs Wiring Setup 3OP2 Figure 10 Three Wire Wye Connection Using 2 PTs 3 CTs Wiring Setup 3LL3 or 3Ln3 Energy is measured with 2 CTs only Phases 1 A and 3 C ...

Страница 15: ...lation 11 Figure 11 Three Wire Open Delta Connection Using 2 PTs 3 CTs Wiring Setup 3OP3 Energy is measured with 2 CTs only Phases 1 A and 3 C Figure 12 Four Wire Delta Connection Using 3 CTs Wiring Setup 4LL3 or 4Ln3 ...

Страница 16: ...Auxiliary Terminal Block as described below TB PIN NUMBER SIGNAL 1 DIN 1 2 COMMON 3 DIN 2 4 COMMON 5 DIN 3 6 COMMON 7 DIN 4 8 COMMON 9 NOT CONNECTED Table 2 Auxiliary Terminal Block Four optically isolated digital inputs are provided for status monitoring and external synchronization of power demand period and time Dry contacts may be connected to these inputs as shown in Figures 14 For ratings se...

Страница 17: ...wo optically isolated digital inputs are provided for status monitoring dry contacts that may be connected to these inputs by a four pin detachable terminal block and two Change Over Relay Contacts are provided to a separate six pin detachable terminal block as shown in Figures 14 For ratings see Appendix Technical Specifications Figure 14 2DI 2DO Connection Analog Inputs Analog Outputs 4AI 4AO op...

Страница 18: ...t and a PC serial port Figure 15 Infrared Communication port COM1 Wireless Communication port GSM GPRS module COM2 optional module The Wireless Communication port COM2 is provided by optional module GSM GPRS module The GSM GPRS module can only be plugged in the EM720 module slot 3 The Before plugging in the GSM GPRS module to the instrument insert the SIM card into the SIM card carrier then pull t...

Страница 19: ...B and ETH USB modules Each module with Communication port COM3 provides two indication GREEN LEDS RX GREEN LED blinking led shows receiving data at COM3 TX GREEN LED blinking led shows sending data at COM3 While mounting IRIG B and ETH USB modules in the same instrument only one RS 485 232 Communication port can be active COM3 RS 485 mode In the RS 485 mode the 485 232 terminal of the 5 pin plug i...

Страница 20: ...45 connector for ETHERNET and mini USB type B connector for Laptop USB port as shown in figure 18 and figure 19 respectively The ETH USB module can only be plugged in the EM720 module slots 1 and 2 The ETH USB module provides additionally to COM3 indication GREEN LEDS ETHERNET indication leds LNK GREEN LED ACT ORANGE LED when LNK is ON continuously and ACT is blinking it shows that the ETHERNET is...

Страница 21: ...ction To prevent potential differences between the Personal Computer PC USB port and the EM720 USB device port it is recommended to use a galvanic isolated USB adaptor before connecting the EM720 USB port to a Personal Computer PC or to use battery powered PC ...

Страница 22: ...The APS module is connected to an external DC Voltage source with a three pin width pluggable terminal block as shown in figure 20 see Technical Specification for DC Voltage Inputs requirements The DC APS module provide two indication GREEN LEDS VIN GREEN LED is ON continuously when DC voltage is applied to the terminals is OFF if Measurement AC Voltages inputs are applied to the EM720 VOUT GREEN ...

Страница 23: ...n modules and Auxiliary DC Power Supply module The following functions are available in the following slots IRIG B any slot COM2 Dial up or Cellular modem port slot 3 only COM3 any slot Ethernet any slots USB slots 1 and 2 I O future any slot AUX POWER SUPPLY any slot Figure 22 Modules Front panel side Figure 23 Modules connectors side ...

Страница 24: ...apter 3 Communications 2 Communications Computer Connections RS 232 Figure 24 RS 232 Simple 3 wire Connection 25 pin or 9 pin PC COM Port Computer Connections RS 485 Figure 25 RS 485 Multidrop Connection 25 pin or 9 pin PC COM Port ...

Страница 25: ...ers removing 2 Use a flat screwdriver to open the battery housing cover as in figure 25 turning counter clockwise and remove the battery Remove the Battery housing cover Figure 27 Battery Housing cover removing 3 Replace the battery with the plus towards the outside as in figure 26 and close the battery housing Figure 28 Replacing the 3 6V Lithium Battery IMPORTANT Use an AA lithium 3 6 volts batt...

Страница 26: ...ed impulse voltage IEC 62052 11 protective class II 6000V Reference voltage Un 57 73V up to 120V L N via PT Terminals for wires size 2 5 up to 6 mm 2 Voltage rating 3 x 120 207 V 3 x 220 380 V 3 x 230 400 V 3 x 277 480 V 3 x 220 V 3 x 230 V 3 x 277 V Line to Neutral voltage range Crest factor 0 up to 320 V r m s 2 voltage peak up to 700 V Temporary over voltage between live conductors and earth Tr...

Страница 27: ... circuit current Isc 10 x In Burden per phase In 5 A 0 2 VA Burden per phase In 1 A 0 05 VA Starting current I1 I2 I3 0 1 In Starting current I4 0 5 In Over current withstand for 1 second non recurring 50 x In Voltage galvanic isolation rating 4000V r m s Reference Current Basic model In 5A Option model In 1A Terminals for wires size 2 5 to 6 mm 2 ...

Страница 28: ...internal power supply 5mA wetting current per contact Open contact impedance 1MΩ Close contact impedance 100Ω Sampling rate cycle 1ms Dielectric insulation withstand 4 KVAC 1mn Basic Terminals for wires size 8 x 2 5 mm2 Digital Input Dry contact Optically isolated 2 inputs Wetting internally input contact 24 VDC internal power supply 5mA wetting current per contact Open contact impedance 1MΩ Close...

Страница 29: ... 4 KVAC 1mn Time code signal Unmodulated pulse width coded Signal Level Unbalanced 5V Connector Type BNC Recommended cable 51Ohm low loss RG58A U Belden 8219 or equivalent TNC connector IRIG B IRIG B module Optional Recommended GPS time code generator Masterclock GPS 200A Plug in modules network communication port Field installable Wired LAN communication port IEEE 802 3 Ethernet port Baud rate 10...

Страница 30: ...nication port COM1 Real Time Clock 5 ppm Accuracy 25 C 2 7 minute year RTC backup data retention 5 years Log Memory Standard Log Memory 8MBytes Non Volatile Memory 20years Data retention Expanded Log Memory 16MBytes Environmental Conditions Full Accuracy Operational temperature 25 C to 60 C Operational temperature 40 C to 70 C Storage temperature 45 C to 85 C Humidity 0 to 95 non condensing Constr...

Страница 31: ...5Mhz 80MHz Power Frequency Magnetic Fields IEC61000 4 8 Immunity Damped oscillatory waves IEC61000 4 12 IEC 62052 11 CMM 2 5KV and DFM 1KV 100KHz and 1MHz Radiated Conducted Emission CISPER 22 Class A Safety IEC 61010 Impulse protective class II IEC 62052 11 6KV 500Ω 1 2 50 μs Insulation Dielectric withstand protective class II IEC 62053 22 4 KV r m s 1mn Measurements and Accuracy IEC 62052 11 IEC...

Страница 32: ...1 V I 10 FSV FSI 0 to 999 9 Total Demand Distortion TDD 100 1 5 TDD 1 I 10 FSI 0 to 100 Active energy Import Export IEC 62053 22 Class 0 2S 0 to 999 999 999 MWh Reactive energy Import Export Class 0 5S under conditions as per IEC 62053 22 2003 0 PF 0 9 0 to 999 999 999 Mvarh Apparent energy Class 0 2S under conditions as per IEC 62053 22 2003 0 to 999 999 999 MVAh Symmetrical components Voltage FS...

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