CewePrometer Energy meter in class 0.2S, 0.5S and in class 1 Rack - PDF document

CewePrometer Energy meter in class 0.2S, 0.5S and in class 1 • Rack or wall mounted • Three serial communication ports alternatives • More than one year logging memory • Instantaneous values with high accuracy • Shows harmonics and power quality • Easy to configure • Open protocol, IEC 62056-21, DLMS and Modbus RTU • Built in terminal • Supported by CeweCetrics, Görlitz, Itron(MV90), Rejlers, Kamstrup, Fröschel, Baer, Comverge, Energy ICT and ELIN softwares

General description of the CewePrometer The CewePrometer is the energy meter that apart from measure also shows your power quality. The meter is developed and produced by Cewe Instrument AB What the CewePrometer can do! Measure energy Store loggers (load profile) for longer peri- ods. CewePrometer can measure Active energy (Wh) CewePrometer is equipped with a large capacity • Reactive energy (VArh) fmash memory for data-logging purposes. Up to 100 • Apparent energy (VAh) logging channels in two loggers may be used to • The measured energy is accumulated in energy reg- record energy, power, and voltage etc. The two log- isters for import and export energy directions. For gers can have separately demand period. When us- Reactive energy values are stored for all quadrants. ing the logger for energy values, the CewePrometer Apparent energy is calculated independently for stores the actual meter reading (counter value). For each phase and the total is calculated as a square instantaneous values, the meter can store one of four root sum of watts and vars. alternatives; average, max, min or instant values for the period. Energy registers Import/ Capacitive/ Energy QI-QIV Export Inductive Active - - • Reactive • • • Table showing approximate storage capacity in Apparent - - • days: Number of logging channels Logging interval (min) 1 2 3 4 5 6 7 8 9 10 30 50 21 14 10 8.6 7.2 6.2 5.4 4.8 4.3 3.9 1.4 0.8 1 2 43 28 21 17 14 12 10 9.6 8.6 7.9 2.8 1.7 108 72 54 43 36 31 27 24 21 19 7.0 4.2 5 10 217 144 108 86 72 62 54 48 43 39 14 8.5 326 217 163 130 108 93 81 72 65 59 21 12 15 20 435 290 217 174 145 124 109 97 87 79 28 17 652 434 326 260 217 186 163 144 130 118 42 25 30 60 1304 869 652 521 434 372 326 289 260 237 84 51 2

General description of the CewePrometer General description of the CewePrometer Logged values Transmit and receive pulse information, By Min/ alarms etc Total phase max The CewePrometer can be equipped with pulse in- Active energy import/export N/A • • puts and outputs. Reactive energy import/export - N/A • The inputs can be used to receive external pulses Reactive energy inductive/ - N/A from meters. The pulses are stored as logg channels • capacitive and accumulating registers. Reactive energy QI-QIV - N/A • The outputs are primary used for alarms and/or en- Apparent energy import/export - N/A • ergy pulses. Phase voltage • • • Phase to phase voltage • • • Calculate maximum demand Current • • • The CewePrometer can be set to calculate up to Active power • • • eight different maximum demand values in eight (8) Reactive power • • • MD registers. MD for active, reactive and apparent Apparent power • • • energy in import export direction are possible. Frequency N/A • • Phase angle • • • Delta values of energies Power factor • • • Delta value for a particular energy is the difference THD voltage • • • of energy values in a given time interval. Meter can THD current • • • calculate Delta values for all available energies in External registers 1-8 N/A N/A • CewePrometer. Display instantaneous values with high ac- Store and provide periodical invoicing data curacy The CewePrometer takes a ”snapshot” of all accu- In addition to the conventional data from the energy mulating and MD registers. registers, instantaneous values can be read with the same class as for energy: - 15 readings can be stored Current in each phase - End of period determined with calendar, pulse • Phase to phase voltage input or by software. • Phase to neutral voltages • Power factor per phase and total • Security Phase angle per phase and total • The security system in the CewePrometer and Frequency • CeweConfjg software consists of fjve password lev - Active power per phase and total • els. The highest level is protected with a hardware Reactive power per phase and total • jumper and is used for calibration and initiation of Apparent power per phase and total • the meter. The lowest level gives you read only ac- THD (Total Harmonic Distortion) for volt- • cess. age and current The meter is provided with sealing tabs screws. Display of individual voltage and current • harmonics Self diagnostic Vector diagram • The CewePrometer display and register module continuously verifjes that memory and registers are These values are calculated 12 to 15 times each sec - ond, based on data from four periods. The display is in good condition. This module also communicates with all other modules to verify that they are run- updated every second with an instantaneous value. ning. Act as a terminal User interface via graphical display and The CewePrometer is equipped with four inputs, front panel keys which can be used to record energy from other me- ters. A graphical display on the front and three buttons 3

General description of the CewePrometer Power quality to navigate makes it easy for the user to fjnd use - The CewePrometer can measure chosen parts of the ful information on the meter. The information is EN50160 standard. displayed as text and as graphic. The user can con- - Logging of voltage and current outages, with fjgure up to fjve different display sequences where timestamp and duration one is accessed with a forth button under a sealable - Monitoring of short voltage fmuctuations cover.. - Monitoring of long voltage fmuctuations - Measuring of harmonics and THD Easy configured - Vector diagram and harmonics are shown graph- With the software CeweConfjg, the user can easily ically change the parameters in the meter. The user can - Alarm for harmonics and THD also make instantaneous readings, have a view on - Alarm for current, voltage, power, power factor, the harmonics or read out the events. The software and voltage unbalance is available for numerous languages. Application of corrections for measuring Communication and power transformer errors and losses The CewePrometer is always equipped with an opti- The measuring transformers have errors that cal port, complying with IEC 62056-21. In addition contribute to the total error in the system. The to that, the meter can also be ordered with RS232, CewePrometer can compensate for these errors and RS422/485 or Ethernet port. Up to two extra ports to achieve a system with higher accuracy without can be fjtted into the meter. replacing existing transformers. Sometimes the system energy selling point and The RS422/485 port is used to connect many me - the most convenient or economical position in the ters on the same site in a LAN with i.e. a modem system for measuring the energy are not the same. (PSTN/GSM/GPRS). For example, the commercial interface for a gen- erator station selling the energy may be on the HV With Ethernet port you can easily connect the meter side of the line transformer. The most economical directly to the Intranet/Internet which gives you a place to measure the energy is on the LV side of the cheap and quick connection. power transformer, because of the cost for measur- ing transformers. To measure and sell the energy in Front panel LED indicators different places in the system requires some means The CAL Active and CAL Reactive is used when of accounting for the losses between these two posi- performing a calibration or checking the meter ac- tions, i.e. the power transformer losses. curacy. It emits a light pulse frequency proportional CewePrometer can perform these corrections and to the power level, and consequently every pulse compensations for measuring transformer errors and corresponds to a certain amount of energy. The con- power transformer losses. stant (pulses per kWh or pulses per kVArh) can be Correction for measuring transformer errors, CT’s set by the user. and VT’s can be done for phase angle error and The Alarm-LED is fmashing when it indicates that an magnitude error. alarm condition is present. Compensation for power transformer losses can be The Power LED simply indicates that the meter done for iron losses (magnetisation losses) that are power supply is working and the meter is alive. more or less constant and copper losses (resistive losses) that are proportional to the square of the cur- Diagnose installation/connection errors rent. Voltage phase sequence and correct connection of the currents can be checked on the display. Mounting and accessories For installation of the CewePrometer-R (rack) there Store event and error messages is a ready-to-use 19” rack and also plug-in cable The user can set alarm and alarm conditions. The packages for measuring circuits and I/O ports. user sets if the alarm shall be indicated on the front and/or a pulse output. 4

Dimensions Dimensions 19” rack, DIN 43862 482,8 465 407,8 132,5 57,1 323 3,5 435 CewePrometer-R dimensions Front F ront 196 264 39 293,6 1 2 B0725 B0773 203,2 CewePrometer-W dimensions CewePrometer-W panel mounting kit B 173,5 D 98 H 270 For the Wall meter there is a panel mounting kit for use in panels. B0774 5