AEM31 MANUAL - Electrocomponents
Contents
1. the persons instructed to carry out these procedures follow normal safety precautions 1 2 SYMBOLS CAUTION Failure to follow the instructions may result in personal injury or damage to equipment Se NOTE Failure to follow the instructions may result in an instrument malfunction 2 MOUNTING The instrument is of the front mounting panel mount type conforming to the DIN 96x48 standard Panel Cut Out 45mm x 92mm Panel Thickness 5mm Max To mount the unit to the panel push the unit through the cutout from the front From behind the panel install the two mounting blocks by inserting the lugs AA into cutouts BB in the side of the instrument body and push backwards to lock into place Ensure the crosshead screw is facing towards the back of the unit Using a suitable Phillips screwdriver tighten the mounting block screws down against the rear face of the front panel to hold the unit securely in place PANEL THICKNESS 5 0m m Max S PANEL CUT OUT 45 x 92mm Ss FIXING BLOCK X2 Making sense of your energy 3 1 CONNECTION OF THE VOLTAGE INPUT LIVE NEUTRAL CT INPUT VOLT INPUT POWER SUPP FRONT VIEW Phi R Ph2 Y Ph3 B Sree FUSE RATING 100 mA VOLT INPUT POWER SUPP N V1 V2 V3 FRONT VIEW CAUTION The instrument is suitable for connection to a 415VAC 4 wire STAR system Connection is made via the terminals marked VOLTS INPUT Phase 1 RED should be connected to V1 phase 2 YELLOW to V22. AEM31 PANEL ELCOMPONENT INSTRUCTIONS This instrument was manufactured and tested in compliance with class 2 IEC 1010 and VDE 411 standards in accordance with group B VDE 0110 standards for operating voltages up to 250 VACrms phase to neutral It is suitable for use on 3 phase 4 wire star systems and single phase supplies To maintain this condition and to ensure safe operation the user must comply with the following instructions Ensure that the operating voltage is correct for the supply e The power supply does not require an earth connection A 50 mA T Type fuse should be installed in the power supply circuit to the instrument i e phase 1 Maintenance and or repairs must be carried out only by qualified authorised personnel e If there is ever the suspicion that safe use is no longer possible the instrument must be disconnected and precautions must be taken against accidental use e Operation is no longer safe when 1 If there is clearly visible damage 2 If the instrument no longer functions 3 after prolonged storage in unsuitable conditions 1 1 OPERATOR SAFETY Read these instructions carefully before installing and utilising the instrument The instrument described in this user manual is intended for use by properly trained staff only Maintenance and or repairs must be carried out by authorised personnel only For proper safe use of the instrument and for maintenance and or repair it is essential that
3. and phase 3 BLUE to V3 The Neutral BLACK cable is connected to the terminal marked N For single phase systems voltage connections to V1 and Neutral only are required CAUTION The instrument has no internal power supply fusing AN and must therefore be protected by an external fuse rated at 250VAC 100mA Type T fitted on phase 1 RED 3 2 CONNECTION OF THE CURRENT CT INPUT The AEM31 is suitable for use with current transformers CTs with 5A secondary output Metering quality CTs of Class 1 accuracy with a minimum rating of 2 5VA are recommended See over for the table of CT ratios which can be utilised with this instrument Connection should be made according to the diagrams above For 3 phase supplies one side of the CT secondaries S1 should be connected to the relevant input terminal Red phase to 11 Yellow to I2 and Blue to 13 The remaining CT Terminals S2 are commoned to the COM terminal which should also be earthed as shown For single phase systems connections to L1 and COM only are required NB The AEM31 is an advanced design which automatically compensates for reversed CTs and incorrect phase rotation However the relationship between current and voltage inputs must be respected ie if red phase volts is connected to L1 the red phase CT must be connected to 11 etc 3 3 PULSE OUTPUT CONNECTION CAUTION The pulse output contacts are rated at 27VAC 20mA 27VDC 20 mA Under no circumstances should this rating be
4. and the instrument will show the highest average kW over a 30 min period since the last reset The display may be toggled between the two parameters without affecting the readings in any way 6 1 TECHNICAL CHARACTERISTICS Connection 3 phase star or single phase Inputs Voltage 415VAC 3ph 50 60 Hz Current 5A max 20 800 Hz Burden 0 5VA Pulse Output Opto isolated volt free contact Rating 100mA 250 VAC Value 1 pulse per kWh Duration 400 500 msec Power Supply Internally connected from volts input Consumption 3 VA Overload Volts 264VAC Ph N 460VAC Ph Ph Amps 16A Max 60A for 1 second Weight 300g IP rating Instrument IP20 Front Panel IP40 Temp Range From 5 C to 45 C Dims 70w x 57 5d x 90h mm N B Do not expose the instrument display to direct sunlight SELECTABLE CT RATIOS 5 5 500 5 25 5 600 5 40 5 750 5 50 5 800 5 60 5 1000 5 75 5 1200 5 80 5 1250 5 ee ELCOMPONENT gy Unit 5 Southmill Trading Centre Southmill Road Bishop s Stortford Herts CM23 3DY Tel 01279 503173 Fax 01279 654441 sales elcomponent co uk 10 03
5. exceeded The pulse output connection is made via the two terminals marked pulse See below The contacts are volt free and therefore an external power source must be provided Contacts are normally open and provide an output of 1 pulse per kWh Pulse duration contacts closed is 400 500 msec 4 1 INSTRUMENT SET UP AND RESET When the instrument is correctly connected to voltage and current it will automatically power up and begin measuring The display will show WAIT during initial power up whilst the unit carries out a self test routine After a few seconds the display will show a value and the MD button will illuminate The instrument must be set up for the CTs to which it is connected This need only be done once after which the setting is maintained in memory for the life of the unit regardless of whether it is powered up or not NOTE The RESET slide switch on the rear of the panel must be set to ON prior to commencing the set up routine POWER SUPPLY an ad tac WH SUPPLY FUSE RATHG Tima T TYRE CH W WARES iby VOLTS 1H p UT ee Fetes SE w CUAREMTIMPUT PULSE Le Li Got AX WO ZO Va FHN CTH 54 Lins RUIRMER Sth ST A SITE 4 2 CT SET UP The unit utilises a hidden button situated in the centre of the AEM31 logo to the lower right of the front panel see below By depressing the MD button and the kWh button simultaneously the instrument is entered into SET UP mode Pre
6. ss the MD button to scroll the available CT ratios When the desired ratio is displayed press the hidden button to accept the values into memory and exit set up M D KWh AEM3 1 HIDDEN KEY LOCATION 4 3 COUNTER MD RESET NOTE The RESET slide switch on the rear panel must be set to ON prior to executing a reset action To execute a reset of either the cumulative kWh counter value of the Maximum Demand value ensure the value to be reset kWh or MD is displayed on the instrument Press the parameter key kWh or MD and the hidden key simultaneously to execute the reset Ee NOTE To eliminate the possibility of unwanted resets or set up changes the RESET slide switch should always be set to OFF after either of these actions have been carried out This renders both set up and reset inoperative 5 1 INSTRUMENT OPERATION Following connection and set up the instrument may be set to read either kilowatt hour kWh consumption of Maximum Demand MD in kilowatts kW Depress the kWh button to display kWh The button will illuminate and the instrument will show the cumulative active energy consumption to two decimal places 1 100 of a kWh Once the displayed value reaches 999999 99 the decimal will move one place to the right allowing the AEM31 to measure up to 9999999 9 kWh to one decimal place Depress the MD button to display half hour maximum demand in kW The button will illuminate
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