SUGGESTED SPECIFICATION DIGITAL POWER ANALYSER 1STANDARDS COMPLIANCE 11SAFETY

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SUGGESTED SPECIFICATION

DIGITAL POWER ANALYSER



1.Standards Compliance

1.1.Safety & Construction standards:

The PMD shall comply to either one or the other following standards:



  1. IEC 61557-12 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 12: Performance measuring and monitoring devices (PMD)



  1. IEC 61010-1 Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements

INSTALLATION CATEGORY: III (300VAC PH/N)

DEGREE OF POLLUTION: 2

  1. UL 6101OB-1 Measuring, Testing and Signal Generation Equipment

INSTALLATION CATEGORY: III (300VAC PH/N)

DEGREE OF POLLUTION: 2

  1. Vibrations

IEC 60068-2-6 - 2 G: Vibration from 10 AND 100 HZ

1.2.Electromagnetic immunity standards

List of EMC standards

  1. IEC61000-4-2 (EN61000-4-211EC801-2): Electrostatic Discharge (B).

  2. IEC61000-4-3 (EN61000-4-3/(EC801-3), Radiated EM Field Immunity (A).

  3. IEC61000-4-4 (EN61000-4-4/[EC801-4): Electric Fast Transient (B).

  4. IEC61000-4-5 (EN61000-4-5/[EC801-5): Surge Immunity (B).

  5. IEC61000-4-6 (EN61000-4-6/[EC801-6): Conducted Immunity.

  6. IEC61000-4-8 Testing and measurement techniques - Power frequency magnetic field immunity test

  7. IEC61000-4-11 Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests

  8. 2004/108/CE DATED 15 DECEMBER 2004.

2.Measurements

2.1.Standards functionalities

All digital power analyzers shall provide true RMS values. Information provided by each digital power analyzers shall include (all updated at the same rate):

  1. Frequency,

  2. Current per phase, Neutral and line and 3 phase average, Demand current,

  3. Voltage L-L and L-N per phase and L-L, L-N and 3 phase average,

  4. Active power, reactive power, apparent power, Demand power, (per phase and total)

  5. Power factor (per phase, 3 phase total)

  6. Tan Phi

  7. % unbalance for voltage and current

  8. Accumulated active energy, Accumulated reactive energy, Accumulated apparent energy ( EA+,EA-,ER+,ER-,ES)

  9. Total harmonic distortion (THD) of each current and voltage,

  10. Harmonics spectrum analysis up to row 63rd of each current and voltage,

  11. Record of the 60 last events and waveform capture of 43 curves (sag, swell, outage, current overloads)

  12. Temperature information from three external PT100 probes,

  13. Internal temperature of the power analyzer.

  14. Minimum/maximum value for 3 currents, L-L L-N voltages, powers, frequency

2.2.Advanced functionalities : Trending / Maximum demand

The PMD shall be able to display predictive powers (P, Q, S) calculated through the evolution of the power the 10 past minutes .

An alarm shall be set on these predictive powers.

3.Technical Characteristics

Digital power analyzers shall be microprocessor-based.

3.1.Inputs / Sampling

  1. Currents inputs : The digital power analyzers shall accept 3 current inputs from industry standard instrument transformers (5A or 1A secondary current transformers).

  2. The sustained overload capacity of the current input shall be no less than 6A.

  3. The short time overload shall be no less than ten times In during one second.

  4. Voltage inputs: The digital power analyzers shall be applied in any single-phase, two-phase or balanced/unbalanced three-phase systems. In four-wire connection, the digital power analyzers shall utilize the circuit neutral common reference and not earth ground to provide metering accuracy.

  5. The voltage input for PMD shall be able to accept from 18VAC to 700VAC without using potential transformers. It shall be able to withstand continuous overload condition of up to 760 VAC RMS, and 1 minute overload withstand shall not be less than 2500VAC.

  6. The power analyzer shall be suitable for high voltage networks through a voltage transformer. The VT ratio shall be programmable on the front end and through communication

  7. VT primaries through 500kV shall be supported. CT primaries through 10 kA shall be supported.

  8. The current and voltage signals shall be digitally sampled at a rate high enough to provide valid data for waveform analysis and true-RMS metering accurate beyond the 63rd harmonic (fundamental of 50Hz). The sampling frequency shall be 10.24kHz

  9. The auxiliary power supply shall be available from 110 to 400VAC.

  10. The PMD shall calculate power load curves over 56 days integrated every 10 minutes. (P and Q)













3.2.Logging

  1. Events

The PMD shall have at least 2Mbits of user programmable onboard data logging. It shall store all critical internal and revenue data upon sudden power loss.

The PMD shall have non-volatile memory.

The PMD shall have a time-stamped event log with the following features:

Support at least 60 events and 40 curves logging for the following measurements :

Each event shall be recorded with the date and time of the event. (sag, swell, outage, over current)

All time stamps shall have a resolution of 10 millisecond.

Minimum event recording response time shall be 1/2 cycle for high speed events and 1 second for other events.

The meter shall be provided with a free software which is able to monitor the curves.



  1. Alarms

See 3.3 Alarms

  1. Load curves

The PMD shall store load curves up to 56 days for the following measurements : P+, P-, Q+, Q-, S. These load curves shall also be managed through external synchronization top

3.3.Alarms

When the device is fitted with In/Out option module, at least 6 (2 per In/out module) alarm events shall be configured on following parameters:

  1. Over/under current & voltage

  2. Phase loss, current: & voltage

  3. Over kVA

  4. Over kW or kVAR into/out of load

  5. Over/under frequency

  6. Under power factor, true or displacement

  7. Predictive powers

  8. Temperature

  9. THD

  10. Tan Phi

For each over/under metered value alarm, the user shall be able to define a pick-up, drop-out., and delay.

Indication of an alarm condition shall be given on the local display as well as reported to the Power Monitoring System software.

The 10 last alarms shall be logged in the memory like the events.









3.4.Inputs/outputs

The Power Monitoring Device shall have 2 option outputs for pulse energy counting. Up to 6 digital inputs and outputs shall be provided for monitoring of switchgear switching devices CB & disconnector on/off, CB trip, etc.

The PMD shall have option for up to 4 analog outputs.

3.5.Events capture

The PMD shall be able to perform sag/swell/outage/over current detection of voltage disturbances on a cycle-by-cycle basis, providing the duration of the disturbance, the minimum, maximum, and average value of the voltage for each phase during the disturbance. It shall be sensitive enough to detect any disturbance lasting for a minimum of half a cycle.

The device shall store 120 measuring point in 1.2 seconds

3.6.Operating Conditions

Digital power analyzer shall be rated for an operating temperature -10°C to 55°C and have an over current withstand rating of 500A for 1 second.

  1. operating-temperature range: IEC 60068-2-1/IEC 60068-2-2 -10 °C to +55 °C

  2. storage temperature range: IEC 60068-2-1/IEC 60068-2-2 -20 °C to +70 °C

  3. humidity: IEC 60068-2-30 - 95 % hr

  4. saling fog: IEC 60068-2-52 - 2,5 % NaCl

All setup parameters required by the digital power analyzers shall be stored in non-volatile memory and retained in the event of an auxiliary power supply interruption.

The auxiliary power supply shall be provided from the AC power within the LV switchboard.

3.7.Accuracy

The digital power analyzers shall meet the following requirements:

Accuracies shall be maintained according to the table located in appendices.

No annual recalibration by users shall be required to maintain these accuracies.

Voltage and current for all phases shall be sampled simultaneously to ensure high accuracy in conditions of low power factor or large waveform distortions (harmonics).

The digital power analyzers shall be capable of being applied without modification at nominal frequency from 45 to 65Hz.

The meter shall meet the IEC 62053-22 Class 0.5 S (for Active Energy)

The meter shall meet the IEC 62053-23 Class 2 (for Reactive Energy)

The complete characteristics are detailed in appendix.

3.8.Communication

The analyzer shall be able to communicate with the BMS by means of plugging in a communication module and without further modification of the basic unit.

The analyzer shall be accessible through the following protocol options :



  1. Jbus/Modbus (RS485)

Each power analyzer shall have optional RS-485 data communications to allow communication to computer workstations, programmable controllers, and other host devices, up to a data rate of 38400 bds.

All information shall be available from RS-485 communications. It shall be possible to perform the communication setup via the display. Dip switches shall be required to set up termination resistances.

The RS-485 communications shall provide communications links up to 10,000 feet long. The power meter shall communicate using the Modbus RTU protocol (or compatible) and connect to any host devices with a Modbus-compatible port. The power meter shall communicate using Jbus protocol (or compatible) and connect to any host devices with a J-bus compatible port.



  1. Profibus DP 12Mbds (standard Profibus terminal SUB D9)



  1. Profibus DP via RS485



  1. Modbus TCP/IP (RJ45 Ethernet)

The analyzers that are equipped with an Ethernet port shall be internet enabled and shall have built in web pages in their memory giving access to real-time values and basic power quality information using a standard web browser.

Whenever required, Ethernet gateway shall be provided, Ethernet Gateway shall feature one 10/100 Mbit UTP port. The Ethernet Gateway shall feature one RS-485 serial port. A single Ethernet Gateway shall provide high speed Ethernet support for at least up to 246 devices. It shall allows users to access power monitoring information from any location on a local area network (LAN) or a wide area network (WAN).

When it is fitted with an Ethernet/Ethernet RS485 gateway module, the device shall display his measures and configuration on an embedded web server reachable by entering the IP address of the device in an Internet browser.

4.Ergonomy

The digital power analyzers shall have an integral, continuous duty, long-life display and provide direct access keys to the following metered quantities which shall be updated every second:

  1. Current, per phase MIS, three-phase average and neutral.

  2. Voltage, phase-to-phase, phase to neutral, and three-phase average (phase-to-phase and phase-to-neutral)

  3. Real power, per phase and three-phase total

  4. Reactive power, per phase and three-phase total

  5. Apparent power, per phase and three-phase total

  6. Power factor, per phase and three-phase total

  7. Predictive power (P, S, S)

  8. Frequency

  9. Demand current, per phase and three-phase average

  10. Demand real power, three-phase

  11. Demand apparent power, three-phase

  12. Accumulated Energy (kWh and kVARh) (EA+; EA-; ER+; ER-)

  13. THD, current and voltage, per phase

All the above values shall be easily accessed through direct access keys (no sub menus)



Reset of the following electrical parameters shall also be allowed from the front of the digital power analyzers:

  1. Peak demand current

  2. Peak demand power (kW) and peak demand apparent power (kVA)

  3. Predictive powers

  4. Energy (kWh), reactive energy (kVARh) and apparent energy

The digital power analyzers shall be equipped with all the necessary equipment and devices to enable all of the above monitoring and control signals to be transmitted to and from the BMS.

The digital power analyzers shall have a 10 year life

The microprocessor-base shall be designed to have allowable replacement with the latest model without a complete change of the power analyzers.

5.Advanced features

  1. The PMD firmware shall be field upgradable



  1. Through a software, the PMD shall have multiple tariffs and Time of Use (TOU) functionality to store and monitor up to 20 years of seasonal rates schedules. The TOU feature shall support 16 rate tariffs and allows periodic self-read capacity. (Billing)

6.Appendix :

SUGGESTED SPECIFICATION DIGITAL POWER ANALYSER 1STANDARDS COMPLIANCE 11SAFETY SUGGESTED SPECIFICATION DIGITAL POWER ANALYSER 1STANDARDS COMPLIANCE 11SAFETY

Specification Diris A60 – SCP/DCM/ISD/IAC – 01/06/2010


4H GEOLOGY SPECIMEN LABELS (SUGGESTED FORMAT) ROCK IDENTIFICATION CARDS
6TH GRADE SUGGESTED WORD PARTS INTRODUCTIONEXPLANATION IN AN EFFORT
7TH GRADE SUGGESTED WORD PARTS INTRODUCTIONEXPLANATION IN AN EFFORT


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