Revenue Meter with Advanced Power Quality Capabilities eXpertMeter - EM720
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Transcript of Revenue Meter with Advanced Power Quality Capabilities eXpertMeter - EM720
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