Revenue Meter with Advanced Power Quality Capabilities

eXpertMeter - EM720

ExpertMeter – EM720

“All in one” High Performance Meter:

Revenue meter

Power Quality Analyzer

Fault Recorder

Transient Recorder

Revenue Meter

IEC 62056-21 protocol support (Infra red)

Accuracy according to IEC 62053-22 Class 0.2S

TOU up to 8 tariffs and 4 seasons

PQ Analyzer

3 Voltage and 4 Current inputs

Voltages and Currents Harmonics and Interharmonics measurement: IEC 61000-4-7 class I

IEC 61000-4-15: Flicker measurement

Complete Power Quality Reports per EN50160 and

IEC 61000-4-30 Class A

Four measured and recorded currents up to 50 A (10In)

Chargeable Back-up battery – 2.5 hours

GPS Time synchronization

Sequence of events with 1 ms accuracy

Fault Recorder

Transient Recorder

Pick-Voltages up to 2000 V

Time 19mcs to 10ms

4 Voltage waveforms captured

3 Phase and neutral to ground

Modules (Hot swap)

Field Replaceable I/O options

Field Replaceable Advanced Communication options

EM720 - Commutations

Communication ports: – Ethernet, – USB,– IR-port – RS232/485,– GSM/GPRS modem

Protocols:– IEC 61850,– Modbus RTU,– ASCII, SMTP, – Web-server

Digital Input Status input / Pulse input

Digital Output Relay / Pulse relay

SATEC DI/DO functions

APPLICATIONS

Utilities Transmission | Distribution | Substations

IndustrialPower Stations | Industrial Plants | Process Control

CommercialBig Commercial Centers

Using the EM720 in “Shaar Hair” building complex project for fault

detection

Detection of PQ failures using EN50160 STD

I II

Samples of using EM720 Revenue Meter

A

B C D

I II

10001000100010001000 630

Public

Substation B Substation A

Device #3

Device #2

Device #1

Supply diagram of the building project

Parameters of devices

Device 1: (EM720T, 0.4 kV)Nominal primary current = 400 ANominal primary voltage = 230 V

Device 2: (EM720T, 22 kV)Nominal primary current = 100 ANominal primary voltage = 22 kV

Device 3: (EM720T, 0.4 kV)Nominal primary current = 1200 ANominal primary voltage = 230 V

Statistics EN50160 – Compliance report

Voltage Dips report :Device-3 (1/02-7/05)

List of dips’ events (30/04-4/05)

Voltage Dip RMS plot V31 (60%Un)

Device #1 (0.4 kV): general voltage dip

Device #2 (22 kV): general voltage dip

Device #3 (0.4 kV): general voltage dip

Device #1 (0.4 kV): Voltage dip before interruption

Device #2 (22 kV): Voltage dip before interruption

Device #3 (0.4 kV): Voltage dip before interruption

Device #1 (0.4 kV): Voltage recovery + Inrush current

Device #2 (22 kV): Voltage recover + Inrush current

Device #2, Phase L1, Inrush current - 570 A=5.7 In

Device #3 - Voltage recovery

Device #3 High even individual harmonics-12.6% during voltage recovery

Device #1 (0.4 kV)Spectrum graph and table – high harmonics Voltage THD = 16%, Current THD = 45.9%

Device #2 (22 kV)Spectrum graph and table – high harmonics Voltage THD = 14.3%, Current THD = 25.1%

Device #3 (0.4 kV) Spectrum graph and table – high harmonics Voltage THD = 13.9%, Current THD = 24%

Comparison of THD (0.2 sec)

Device 1: (EM720T, 0.4 kV)Voltage THD =16%Current THD =45.9%

Device 2: (EM720T, 22 kV)Voltage THD =14.3%Current THD =25.1%

Device 3: (EM720T, 0.4 kV)Voltage THD =13.9%Current THD =24%

Voltage Peaks due to high harmonicsHigh Voltage Amplitude - 380V= Un +18%Un (Phase L3, Device #1)

Comparison - voltage peak value

Device #1 (0.4 kV), High Voltage Amplitude - 380V= Un +18%Un

Device #2 Voltage Amplitude - 33 kV = Un +6.1%Un

Device #3 Voltage Amplitude - 340V= Un +4.5%Un

Device #2 - Real time Current TDD (9.9%)

Device #2 - Current TDD trend (22 kV)

Device #2 THD & TDD compliance

Voltage THD=1.7% - OK

Current TDD=9.9% - NOT OK (Prohibited)

Standard IEEE 519-1992: TDD=5%

Summary and Conclusions

High level dips cause to servers and elevators’ failure of operation

High level short period harmonics cause to increase of voltage amplitude that damaged the elevator controller

Increase of TDD by 9.9% totally damaged the reactive power regulator together with full power shut down in the building

The EM720 allowed the detection of all the root cause of these sever phenomenon

Turbine applicationUsing the SATEC product for failure

detection of turbine operation

Detection of turbine failure – big difference between two identical

turbines of 13.4%

After partial problem fix the difference dropped to 9.5% - less operating cost

Failure detection of pumps operation

Using the basic following formula the SATEC meter can detect pump’s operation problem measuring the pump’s efficiency

Efficiency=(Kw/ton) Efficiency should be constant. If changes during

operation, it shows a problem in the pump’s operation

SATEC meters detects in operational sites such a failure during the pump’s operation.

Thank You