Power Quality and Energy Measurement PEM735

Transcription

1 Power Quality and Energy Measurement PEM75 PEM75_D00084_01_D_XXEN/

2 Power Quality and Energy Measurement PEM75 class A Product description The digital universal measuring device PEM75 is suited for measuring and displaying electrical quantities of electricity networks. The device measures currents and voltages, energy consumption and power, and displays the individual current/voltage harmonics for assessment of the power quality in accordance with DN EN The accuracy of active energy measurements corresponds to class 0.2 S in accordance with DN EN (VDE 0418 part -22). The current inputs are connected via external /1 A or /5 A measuring current transformers. PEM75 Device features Class A power analyser, certified according to DN EN Monitoring the quality of the voltage in accordance with DN EN Accuracy class according to EC : 0.2 S TFT colour display (640x480) 5.7 Modbus RT and 4 current inputs 5 voltage inputs 1 GB internal memory Panel mounting 144x144 ntegrated web server Data export via FTP: comtrade, PQDF Flicker measurement Detection and recording of transients (40 µs) Sampling rate: 512 samples/cycle Freely configurable recorders for waveform, consumption and long-term recording EC Typical application Continuous monitoring of the voltage quality in accordance with DN EN Collection of relevant data for energy management systems High-resolution waveform recording allows analysis of power quality phenomena Description of function Sampling rate of the measuring channels: 25.6 khz Calculation of the total harmonic distortion THD/THD: harmonics up to the 6rd harmonic ndividual current/voltage harmonics Password protection History memory for minimum and maximum values of current, voltage, energy, power rating etc. for each month. nputs and outputs: 6 digital outputs, 8 digital inputs (1 khz sampling rate) 24 adjustable parameter setpoints System protocol: 1024 events, setup changes, setpoint alarming, D status changes, DO switching operations Communication: Galvanically isolated RS-485 interface (1.200 to bit/s) Modbus RT protocol (10/100 MBit/s) Standards The universal measuring device for Power Quality and Energy Measurement/PEM75 was developed in accordance with the following standards: EC (VDE 0418 Part -22), DN EN (VDE ), DN EN 50160, DN EN (VDE ), DN EN (VDE ), DN EN (VDE ) 2 PEM75_D00084_01_D_XXEN/

3 Power Quality and Energy Measurement PEM75 Operating elements LNETRAXX 1 2 PEM75 kwh kvarh 1 - Pulse LED: kwh 2 - Pulse LED: kvarh - Display 4 - " " button: Selection (in the menu) 5 - " " button: p (in the menu) 6 - " " button: Down (in the menu) 7 - " " button: Selection (in the menu) 8 - "ENTER" button: OK 9 - "ESC" button: ENTER ESC Example for system set-up PEM7xx PEM7xx Ethernet Datenbank L PEN NSHV CP700 PE PAS BMS 1 12 PEM5xx PEM5xx Modbus RT RCMS Modbus RT Modbus RT 1 12 L N PE V1 V2 RCMS PEMxx PEMxx Modbus RT Modbus RT PEM75_D00084_01_D_XXEN/

4 Power Quality and Energy Measurement PEM75 Wiring diagram Connection diagram voltage inputs S 2 DO1+ 4 DO1- Three-phase 4-wire system (TN, TT, T systems) The PEM can be used in three-phase 4-wire systems, independent of the type of distribution system (TN, TT, T system). DO2+ DO2- AC 400 V/20 V AC 690V/400 V D1 D2 D D4 D5 D6 D7 D8 DC L1 L2 L N 5 6 L2 L1 l41 l1 l21 l11 NC L NC N L4 NC l42 2 l22 12 D+ D- SH D+ D- SH 1 P1(RS-485) P2(RS-485) Act Link 10/100M Ethernet LED P 8 DC RO1 D1 RO14 D2 RO2 D RO24 D4 RO D5 RO4 D6 RO4 D7 RO44 D8 DO1+ DO1- A1/+ PEM R i Three-phase -wire system The PEM can be used in three-phase -wire systems. AC 400 V AC 690 V 7 4 DO2+ DO2- Power A2/- 2 L1 L2 L N L1 PEM R i L2 L1 L2 L N 5 L N Connection via voltage transformers The coupling via measuring current transformers allows the use of the measuring device in medium and high voltage systems. The transformation ration can be adjusted in the PEM75. LV / MV / HV 1 - Connection RS-485 bus 2 - Supply voltage. Power protection by a 6 A fuse, quick response. f being supplied from an T system, both lines have to be protected by a fuse. - Digital inputs 4 - Digital outputs (N/O contacts) 5 - Measuring voltage inputs 6 - Connection to the system to be monitored: The measuring leads should be protected with appropriate fuses. 7 - Connection Ethernet 8 - Relay output PEM R i L1 L2 L N 4 PEM75_D00084_01_D_XXEN/

5 Power Quality and Energy Measurement PEM75 Technical data nsulation co-ordination Measuring circuit Rated insulation voltage 600 V Overvoltage category Pollution degree 2 Supply circuit Rated insulation voltage 00 V Overvoltage category Pollution degree 2 Supply voltage Rated supply voltage S Frequency range of S Power consumption Measuring circuit Measuring voltage inputs L1-N,L2-N,L-N L1-L2,L2-L,L-L1 Measuring range Rated frequency nternal resistance (L-N) V DC, Hz 11 VA 400 V 690 V % n Hz > 500 kω Measuring current inputs External measuring current transformer, should at least comply with accuracy class 0.2 S Burden n.a., internal current transformers Measuring range % N CT transformation ratio, secondary 1 5 A CT transformation ratio, primary A Accuracies (of measured value/of full scale value) Phase voltage L1-N, L2-N, L-N ± 0.1 % of the measured value. Current ± 0.1 % of measured value % of full scale value. Frequency ± Hz Phase position ± 1 Active energy measurement acc. to DN EN (VDE 0418 Part -22) R.m.s. voltage measurements acc. to DN EN (VDE ), chapter R.ms. phase current measurements acc. to DN EN (VDE ), chapter Frequency measurements acc. to DN EN (VDE ), chapter Measurement of the harmonics acc. to DN EN class A nterface nterface/protocol 2 x RS-485, Modbus RT Baud rate kbits / s Cable length m Shielded cable ((shield connected to PE on one side) recommended: J-Y(St)Y min. 2x0.8 nterface Ethernet Protocol FTP,, EC Baud rate 100 MBit/s Switching elements Outputs (RO) 4 x N/O contacts Operating principle N/O operation Rated operational voltage AC 20 V DC 24 V AC 110 V DC 12 V Rated operational current 5 A 5 A 6 A 5 A Minimum contact rating 1 ma at AC/DC 10 V nputs 8 electrically separated digital inputs min 2.4 ma D DC 24 V 2 electronic outputs (DO) max. 80 V max 50 ma Environment/EMC EMC DN EN Operating temperature C Climatic class acc. to DN EN stationary use K5 Classification of mechanical conditions acc. to EC stationary use M4 Height to 4000 m Connection Connection Other Degree of protection, installation Degree of protection, front Documentation number Weight screw-type terminals P20 P52 D g PEM75_D00084_01_D_XXEN/

6 Ordering information Nominal system voltage (N)AC Current input Type Art. No V 5 A PEM75 B Dimension diagram Dimensions in mm Panel cut-out Dimensions in mm Bender GmbH & Co. KG P.O.Box Grünberg Germany Londorfer Straße Grünberg Germany Tel.: Fax: E mail: info@bender.de BENDERGroup PEM75_D00084_01_D_XXEN / / pdf / Schw / Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the current edition at the time of going to press.