DUAL OUTPUT AC CURRENT/VOLTAGE TRANSDUCER

Transcription

1 OPERATOR S MANUAL DUAL OUTPUT AC CURRENT/VOLTAGE TRANSDUCER Masibus Automation & Instrumentation Pvt. Ltd. B/30, GIDC Electronics Estate, Sector-25, Gandhinagar , Gujarat, India Web Site:

2 Contents (1) INTRODUCTION Description 1.2 Block Diagram 1.3 Product Ordering Code (2) SPECIFICATIONS 4 (3) INSTALLATION GUIDELINES 3.1 Terminal Connections 3.2 Connection Diagram 3.3 Mounting Details (4) OPERATION GUIDELINE Calibration Procedure (5) APPLICATION Importance of Isolation 5.2 Application Area (6) SAFETY / WARNING PRECAUTIONS 6.1 Safety Precautions 6.2 Warning Precautions (7)Trouble shooting 7 Figures & Tables Figure1: Block Diagram 3 Figure2: Terminal Connection 5 Figure3: Connection for CT Input 5 Figure4: Connection for PT Input 5 Figure5: Installation details 5 Figure6: Test Set up 6 Table1: Product ordering Code 3 Table2: Specification Warning Symbol The symbol calls attention to the operating procedure, practice or the like which if not correctly performed or adhered to, could result in personal injury or damage to or destruction of part or all of the product and system. Do not proceed beyond a warning symbol until the indicated condition are fully understood and met. Class-2 Type of instrument Class-2 Instrument is using Line & Neutral for Power Supply Input. Note: Information in this manual is subject to change without prior notice or permission. Purpose of The Manual This manual should be provided to the end user. Keep an extra copy or copies of the manual in a safe place. Read this manual carefully to gain a thorough understanding of how to operate this product before starting operation. This manual describes the functions of this product. Masibus does not guarantee the application of these functions for any particular purpose. The contents of this manual are subject to change without prior notice. Note: Information in this manual is subject to change without prior notice or permission. Page 2 of 7

3 1. INTRODUCTION 1.2. block diagram 1.1. Description AC Current & AC Voltage Transducers provide a reliable & accurate analog DC output proportional to the AC input from the secondary of potential and/or current transformers in control enclosures. The output is usually linked to remote monitoring equipment such as meters, recorders, PLC s, SCADA systems etc. Available only in single phase version, externally powered. Average Sensing, Zero-Based Input An economical & accurate means of current / voltage measurement on systems where the waveform is a pure sine wave. Device can also be used for non-critical applications with distorted waveforms, where high accuracy is not required. Calibrated to the RMS value of the sine wave. The plastic case Current/Voltage transducers (DA/DV Series) offer versatility & compactness when panel space is tight & can be mounted on a DIN rail The need for Isolation Safety isolation is important for both manufacturers and consumers. Its purpose is to electrically separate hazardous circuits and transient sources from users and to protect products and their surroundings. Galvanic isolation is the most popular method. Transformers and opto isolators are examples of galvanic isolation. Transformers use separate windings to magnetically convert power from inputs to outputs. Opto isolators convert input signals into light and then convert it back for the output signals. Figure1: Block Diagram 1.3. Product Order Code ENCLOSURE ABS DIN, Rail Mount AC Current Transducer AC Voltage Transducer CONFIGURATION DA DV Single Phase 1 Three Phase 3 INPUT Current Voltage 0-5A 0-150V 0 0-1A 0-90V 1 0-2A 0-300V V 3 OUTPUT 0-1mA (0-10,000 Ohms) 0 0-3mA (0-3,300 Ohms) 1 0-5mA (0-2,000 Ohms) mA (0-1,000 Ohms) mA (0-750 Ohms) 4 0-1V (180 Ohms minimum) 6 0-5V (500 Ohms minimum) V (1000 Ohms minimum) 8 1-5V (500 Ohms minimum) 9 Special SUFFIX (If Applicable) 110 VAC Aux Power EC 230 VAC Aux Power FC DC Aux Power 24VDC K1 DC Aux Power 48VDC K2 DC Aux Power 125VDC K3 DC Aux Power 220VDC K4 Special NO. Of Outputs Single Dual X X Keep Blank D For Example: DA114K4D is the ordering code for AC current transducer in a DIN rail, with a 0-1A input, a 4-20mA dual output & 220 Vdc aux. power. Table1: Product Ordering Code Page 3 of 7

4 2. SPECIFICATION: Item Specification Input Signal Input Signal for AC Current Transducer : 0-5A, 0-1A, 0-2A Input Signal for AC Voltage Transducer: 0-90V F.S. (Nom. 69V), 0-150V F.S. (Nom. 120V), 0-300V F.S. (Nom. 240V), 0-450V F.S. Input Over Range Capability: For Current : 150% more of rated Input. For Voltage : 75% to 120% of rated Input. Input Burden: For Potential Transformer max. Input burden is 0.2VA. For Current Transformer max. Input burden is 0.6VA. Consult factory if critical. Output Signal DC Current Output Range DC Voltage Output Range (Load Resistance) (Load Resistance) 0-1mA( Ω) 0-3mA(0-3000Ω) 0-5mA(0-2000Ω) 0-10mA(0-1000Ω) 4-20mA(0-750Ω) 0-1V (180Ω min.) 0-5V (500Ω min.) 0-10V (1000Ω min.) 1-5V (500Ω min.) External Calibration Adjustment : Zero: ±5% or more With Trim pot Span: ±10% maximum. Output Ripple Peak: Less than 75mV Peak Response Time : To 90%: 200ms max,to 99%: 400ms max Environmental Operating temperature: -10 C to +55 C Temp. Coefficient : ±0.01% per ºC. Insulation Resistance : Input/Output1/Output2/Power/Case. Greater than 200MΩ. Dielectric Test : Input/Output1/Output2/Power/Case 2000Vrms for one minute. Humidity : Up to 40 to 90 % RH non-condense. Compliance Voltage 18V Class index 0.5 Nominal Accuracy For Voltage Transducer:0.25% of rated full scale output from 10% to 110% of rated input range For Current Transducer:0.25% of rated full scale output from 5% to 110% of rated input range Usage Group III (-10 C 0 C.45 C +55 C) (IEC60688) Pollution Degree I (IEC ) OverVoltage Category CAT I (IEC ) External Power Supply: AC Aux. Supply : 110V AC, ±10%, 50Hz. 230V AC, ±10%, 50Hz. DC Aux. Supply : 24V DC, 48V DC, 125V DC, 220VDC ±10%. Power Consumption: For Current / voltage Output: Less than 6.0VA For Dual Output Less than 4.0VA For Single Output Enclosure ABS DIN Rail Mount Weight Approximately Kg. Physical Circuit boards: Copper claded laminate FR-4 Grade epoxy Glass. Construction Terminals : Metal Screw can accept up to 2.5 square mm wire. Case : Bayblend FR 1439/0240 modified ABS, Light gray. (RAL 7035) with fireproofing finish VL94 VO (1.6mm). Size : 60mm Width, 70mm Height, & Depth 112mm. Mounting : DIN RAIL mounting. Connections : Power, Input & Output as shown on the front sticker of the module. Table2: Specification Page 4 of 7

5 3. INSTALLATION GUIDELINES Connection for PT Input: 3.1. Terminal Connections: Figure2: Terminal Connection 1. Terminal 1&2: Output 1 2. Terminal 3 &4: Output2 3. Terminal 9&10: Power Supply Input AC Aux. Supply: 110V AC, ±10%, 50Hz. 230V AC, ±10%, 50Hz. DC Aux. Supply: 24V DC, 48V DC, 125VDC, 220VDC,±10%. 4. Terminal 7&8: Input 5. Terminal 5, 6, 11, 12: NC 3.2 Connection Diagram: All Dual Voltage Transducers DVXXXXX Series Figure4: Connection for PT Input Note: 1. Use>250V-1Amp Cable for Power Supply. 2. If cable has two parallel wires inside than isolation between them must be 2.5 KV Connection for CT Input: 3.3 Mounting Details: Recommended way of mounting is shown below. Distance between mounting of two transducers is more than 50mm. Front View: All Dual Current Transducers DAXXXXX Series Figure3: Connection for CT Input Figure5: Installation details Page 5 of 7

6 4. OPERATION GUIDELINES 4.1 CALIBRATION PROCEDURE Turn on the equipment & allow a minimum of 15 minutes warm up time. Connect the equipment as shown in figure. CALIBRATOR OSCILLOSCOPE TRANSDUCER UNDER TEST Figure 6: Test Setup RESISTANCE LOAD PRECISION DIGITAL MULTIMETER This equipment requires an external power source, connect to an appropriate source. Zero Offsetting: Set the calibrator correspond to min. value, adjust the Zero setting pot to the min. output on precision digital multimeter, also check for the variation of ±5% of full scale. Full Scale Calibration: Set the calibrator correspond to max. value, adjust the Span setting pot to the max. output on precision digital multimeter, also check for the variation of ±10% of output. Linearity Check: Change the current input from min. to max. in step of 25% & record all readings within accuracy of 0.25% of full scale. Output Ripple Check: Using the oscilloscope at 0.5 second sweep rate & appropriate AC range, measure the amount of ripple across the specified resistance, from centre line to peak. 5. APPLICATION 5.1 Important of Isolation In most processes there are pieces of electronic measurement and control equipment from many different manufactures. The signals from these instruments are interconnected to each other and to sensors, transducers and output devices connected in the process loop. In any such measurement and control system there are several problems that are likely to occur, all of which can be solved by incorporating the appropriate isolation between signals. 5.2 APPLICATION AREA: Measurement of most electrical Parameters. Conversion to standard dc output signals. Outputs suitable for PLC s. Use in control cabinets, Process Energy Measurement. 6 SAFETY / WARNING PRECAUTIONS 6.1 Safety Precautions Dangerous voltages capable of causing death are sometimes present in this instrument. Before installation or beginning of any troubleshooting procedures the power to all equipment must be switched off and isolated. Units suspected of being faulty must be disconnected and removed first and brought to a properly equipped workshop for testing and repair. Component replacement and interval adjustments must be made by a company person only. 6.2 Warning Precautions Before wiring, verify the label for correct model no. and options. Wiring must be carried out by personnel, who have basic electrical knowledge and practical experience. It is recommended that power of these units to be protected by fuses, circuit breakers or external over current rated at the minimum value possible. All wiring must confirm to appropriate standards of good practice and local codes and regulations. Wiring must be suitable for voltage, current, and temperature rating of the system. Beware not to over-tighten the terminal screws. Unused control terminals should not be used as jumper points as they may be internally connected, causing damage to the unit. Page 6 of 7

7 Verify that the ratings of the output devices and the inputs as specified in Chapter 7 are not exceeded. Upon receipt of the shipment remove the unit from the carton and inspect the unit for shipping damage. If any damage due to transit, report and claim with the carrier. Write down the model number and serial number for future reference when corresponding with our Customer Support Division. Do not use this instrument in areas such as excessive shock, vibration, dirt, moisture, corrosive gases or rain. The ambient temperature of the areas should not exceed the maximum rating specified. Provide power from a singlephase instrument power supply. If there is a lot of noise in the power line, insert an insulating transformer into the primary side of the line and use a line filter on the secondary side. As counter measures against noise, do not place the primary and secondary power cables close to each other. 7. TROUBLE SHOOTING GENERAL PROBLEMS: UNIT NOT TURNING ON The problem can be bad connection / power of incorrect rating. First check, power on terminal of the instrument itself if it is not present then the fault is in power chord. One must take care while dealing with Power wirings because it may create electrical shock. UNSTABLE READING Check for loose connections. First verify that all conventional instrumentation norms have been followed for wiring. Try using shielded cable for sensor input. Check for ripple on power supplies of Input section and Output sections. If power supplies have ripples, input voltage may be low or there is some failure on power supply card. Please note that this is an isolator, and the Input and Output sections are electrically isolated from each other. Therefore, any power supply measurements should be done with respect to proper grounds. OUTPUT NOT MATCHING WITH THE EXPECTED VALUE It is a normal tendency to doubt the instrument performance, when the Output is not matching the expected value. Kindly make sure that the output is really incorrect with respect to input signal, before attempting any recalibration. Account for measuring instrument s inaccuracies, lead errors and calibration errors. Care must be taken when measuring Output signal. An ordinary 3½ digit multimeter is used it can show reading which deviates from what the instrument is showing as the accuracy of the multimeter may not be as good as the that of the instrument. So use calibrating instrument of accuracy better than 0.1% for purpose of calibration. If the signal is still found to be out of tolerance, calibration should be attempted as described in the next section. VAGUE READING The reason can be reverse input connections. Page 7 of 7