INSTRUCTION MANUAL PHANTOM LOAD MODEL PA For SERIAL NO.

Transcription

1 INSTRUCTION MANUAL For PHANTOM LOAD MODEL PA-305 SERIAL NO. It is essential that this instruction book be read thoroughly before putting the equipment in service.

2 IMPORTANT The information and data contained within this instruction manual are proprietary with MULTI-AMP Corporation. The equipment described herein may be protected by one or more U.S. letters patent. MULTI-AMP specifically reserves to itself all rights to such proprietary information as well as all rights under any such patent, none of which is waived by the submission of this instruction manual to anyone. The recipient, if a Government agency, acknowledges that this instruction book and the equipment described were procured with "Limited Rights" to technical data as described in ASPR (b). Copyright MULTI-AMP Corporation, 983, 988, 989, 99 TABLE OF CONTENTS

3 INTRODUCTION TO TESTING WATTHOUR METERS... Bulletin CHARTS/TABLES... SAFETY PRECAUTIONS... 4 DESCRIPTION OF CONTROLS... 5 INSTALLATION INSTRUCTIONS... 6 OPERATING INSTRUCTIONS... 7 SERVICE AND REPAIR DATA... 9 APPENDIX... CONNECTION DIAGRAMS SCHEMATIC DIAGRAM INDEX ii

4 Insert INTRODUCTION TO TESTING WATTHOUR METERS Bulletin X-TWM here

5 CHARTS/TABLES CONSTANT TABLE FOR REFERENCE STANDARDS WITH BASIC Kh OF 6/0 CURRENT COIL AMPERES CONSTANT FOR POTENTIAL COIL OF: 20 VOLTS 240 VOLTS 480 VOLTS CONSTANT TABLE FOR REFERENCE STANDARDS WITH BASIC Kh OF /3 CURRENT COIL AMPERES CONSTANT FOR POTENTIAL COIL OF: 20 VOLTS 240 VOLTS 480 VOLTS /5 2/5 4/5.5 /0 /5 2/5 5 /3 2/3 -/ /6-2/3 3-/ /3 6-2/3 3-/3

6 REFERENCE STANDARD REFERENCE STANDARD Kh = 0.6 ON 20 VOLT, 5 AMP COILS Rated or Test Amps Meter Under Test Full Load (00% Light Load (0%) Number of Stators 20V Kh 240V Std. Curr Coil Rev. Mtr. Rev. Std. Std. Curr Coil Rev. Mtr (or 50) Rev. Std

7 The above data are based on single-phase testing, series connection. 3

8 REFERENCE STANDARD Kh = /3 ON 20 VOLT, 5 AMP COILS Rated or Test Amps Meter Under Test Full Load (00% Light Load (0%) Number of Stators 20V Kh 240V Std. Curr Coil Rev. Mtr. Rev. Std. Std. Curr Coil Rev. Mtr (or 50) Rev. Std The above data are based on single-phase testing, series connection.insert 4

9 WATTHOUR METER ACCURACY CALCULATOR Bulletin -WMAC pg. & 2 here

10 SAFETY PRECAUTIONS Please read all manuals carefully and completely prior to using this unit. Read and understand all safety, caution and operation instructions before attempting to use this unit. Should a situation arise that is not covered in the general or specific safety precautions, contact your local Multi-Amp representative or Multi-Amp Corporation, Dallas, Texas. Repairs should be done with the unit disconnected from the power source. Should repair or adjustment of energized equipment be required, under no circumstance should the work be done alone. Additional personnel should be present to render aid if required. Many Multi-Amp units have a separate chassis grounding point, check to ensure it is properly grounded. Most adjustments can be made with one hand, keep the other hand free and clear of the unit. When using a test meter, if the meter is not insulated, ground the meter case prior to taking measurements. CAUTION: THIS PHANTOM LOAD UTILIZES A TRANSFORMER LOADING PRINCIPLE WITH THE SECONDARY OF THE CURRENT TRANSFORMER BEING THE OUTPUT OF THE DEVICE. AS WITH ALL CURRENT TRANSFORMERS, WHEN CONNECTING LEADS TO THE METER, DO NOT OPEN THE CIRCUIT WITHOUT FIRST TURNING THE CURRENT OFF OR DAMAGE TO THE PHANTOM LOAD MAY RESULT. 4

11 DESCRIPTION OF CONTROLS 2A CIRCUIT BREAKER Provides overload and short circuit protection for the test set. 3/4A FUSE Located internally, this fuse provides additional overload and short circuit protection to the 480 volt input circuit of the phantom load. TEST CURRENT SWITCH OUTPUT ON/OFF SWITCH CURRENT CONTROL POWER FACTOR SWITCH AMMETER Selects the desired range of full load or light load test current that will be applied to the meter under test and to the current coils of the reference standard. Selections are arranged so that full loads and corresponding light load values (0% of full load) are side by side to minimize switching. Allows the output current to be switched off without disturbing any settings. Adjusts the output current of the phantom load from zero to the maximum value as selected by the TEST CURRENT SWITCH. Determines whether the full load test current is at either unity (.0) or 50% (0.5) power factor. Measures the value of output current. Appropriate full scale range is simultaneously selected by the TEST CURRENT SWITCH. The meter scale of the phantom load reads from "0 to.0" so that the actual measured current is equal to the reading of the meter times the setting of the TEST CURRENT SWITCH. For example: If the TEST CURRENT SWITCH is in the 5 ampere position and the meter reads 0.6, the actual output current is 3 amperes (5 X 0.6 = 3). CURRENT TERMINALS POTENTIAL TERMINALS Four output CURRENT TERMINALS (±, 0, 5, 2.5 amp) eliminate lead changing when used in conjunction with a reference standard having multiple current coil terminals (such as the General Electric type IB-0, Sangamo type J-44 or States type SSS-50 solid-state standard). The test set can operate from any of the five rated input and the common (±) POTENTIAL TERMINALS. Connect the input to the common (±) terminal and the line voltage being used to the properly rated terminal. 5

12 INSTALLATION INSTRUCTIONS REFERENCE STANDARD AND PHANTOM LOAD Set a reference standard near the phantom load. Connect the current and potential leads to the reference standard as illustrated in the CONNECTION DIAGRAMS and as outlined below: Current Circuit. Connect the long, red, heavy lead to the ± terminal on the phantom load and the long, black, heavy lead to the ± or 0 terminal on the standard. 2. Connect the short, light leads from the remaining CURRENT TERMINALS of the phantom load to the matching current terminals of the reference standard. Potential Circuit Connect the combination input power/potential click switch leads to the potential terminals of the reference standard and the POTENTIAL TERMINALS located along the left edge of the phantom load. Be sure to observe polarity and to use the properly rated terminal of the phantom load for the line voltage being utilized. If the reference standard being used is the solid state type, connect the auxiliary power leads as shown on the connection diagram. During testing it will be necessary to set the voltage selector switch of the reference standard to the appropriate test potential being used. Line Circuit Connect the potential (input) leads from the phantom load to the line as illustrated on the connection diagram. Be certain the potential select switch of the reference standard matches the line voltage. 6

13 OPERATING INSTRUCTIONS. INITIAL SET-UP Control Position TEST CURRENT SWITCH OFF OUTPUT SWITCH ON CURRENT CONTROL "0" (FULL CCW) POWER FACTOR SWITCH.0 2. Connect the meter to be tested and the reference standard as shown on the appropriate connection diagram and as described under INSTALLATION INSTRUCTIONS in this manual. Note: Be sure to use the proper primary terminal of the phantom load for the line voltage being used. 3. Set the voltage selector switch of the reference standard to the appropriate value for the test potential being used. FULL LOAD TEST 4. Set the TEST CURRENT SWITCH to the appropriate range to obtain the desired full load test current. Note: Always use the lowest range capable of providing the desired test current. 5. Rotate the CURRENT CONTROL clockwise until the desired test current is reached. Note: The meter scale of the phantom load reads from "0 to.0" so that the actual measured current is equal to the reading of the meter times the setting of the TEST CURRENT SWITCH. For example: If the TEST CURRENT SWITCH is in the 5 ampere position and the meter reads 0.6, the actual output current is 3 amperes (5 X 0.6 = 3). 6. Reset the reference standard to zero. 7. Initiate the FULL LOAD TEST by turning the potential click switch on when the black mark on the edge of the meter disk passes a stationary reference point. This starts the reference standard by energizing its potential coil. If the meter under test or the reference standard runs backwards, reverse either the potential or current connections to the backwards unit. Note that a solid state standard will not count if the polarity to one of its coils is reversed. 8. Count the number of disk rotations by watching the black mark pass the reference point. 9. Stop the test when the desired number of revolutions have been made by turning the potential click switch off. This stops the reference standard by de-energizing its potential coil. 7

14 0. Using the WATTHOUR METER TEST FORMULAS in this manual calculate % accuracy of the meter. POWER FACTOR TEST. Same as steps - 0, except set the POWER FACTOR SWITCH to "0.5". LIGHT LOAD TEST 2. Same as steps - 0, except: Step 4: Set the TEST CURRENT SWITCH to the required appropriate range to obtain the desired light load current. WATTHOUR METER TEST FORMULAS The following formula should be used to calculate the reference standard revolutions (R). revolutions of meter under test X meter Kh R = X std. pot. coil std. current coil X X meter elements 20 5 To find the accuracy of any meter, the following formula is used: calculated revolutions of standard % accuracy of meter = X 00 actual revolutions of standard DEMAND METER TEST When testing mechanical demand registers the following formula is used. The reference standard KW is used to compare against the register's KW in order to determine register accuracy. 0.6 X std. pot. coil std. current coil X X TI * X meter elements X standard revolutions 20 5 KW = The following formula will give the demand register's KW when counting the disk revolution of the meter under test. This method uses the watthour meter revolutions to control the test duration and the demand register KW will be as calculated. meter Kh X TI * X meter revolutions KW = minutes * TI (Time Increments) = register time interval 8

15 SERVICE AND REPAIR DATA Servicing This phantom load utilizes straightforward circuits and components which require little or no service except for routine cleaning, tightening of connections, etc. The following maintenance is recommended:. Open the unit every six months and examine for: a. dirt b. loose connections 2. Remove dirt with dry, compressed air or a vacuum cleaner. 3. Tighten all connections, especially on the larger current wires. Service and Repair Order Instructions If factory service is required or desired, contact the factory for return instructions. A Service & Repair Order (SRO) number will be assigned for proper handling of the unit when it arrives at the factory. If desired, a letter with the number and instructions can be provided. Provide the factory with model number, serial number, nature of the problem or service desired, return address, your name, and where you can be reached should the factory need to contact you. A purchase order number, cost limit, billing, and return shipping instructions may also be provided if desired. If an estimate is requested, provide the name and contact information of the person with approval/disapproval authority. Pack the equipment appropriately to prevent damage during shipment. If a reusable crate or container is used, the unit will be returned in it if in suitable condition. Put the SRO number on the address label of the shipping container for proper identification and faster handling. NOTE: Ship the equipment without instruction manuals or non-essential items such as test leads, spare fuses, etc. These items are not needed to conduct repairs. 9

16 Warranty Statement Multi-Amp Corporation warrants to the original purchaser that the product is free from defects in material and workmanship for a period of one () year from date of shipment. This warranty is limited and shall not apply to equipment which has damage, or cause of defect, due to accident, negligence, improper operation, faulty installation by purchaser, or improper service or repair by any person, company or corporation not authorized by the Multi-Amp Corporation. Multi-Amp Corporation will, at its' option, either repair or replace those parts and/or materials that it deems to be defective. Any costs incurred by the purchaser for the repair or replacement of such parts and/or materials shall be the sole responsibility of the original purchaser. THE ABOVE WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EITHER EXPRESSED OR IMPLIED ON THE PART OF THE MULTI-AMP CORPORATION, AND IN NO EVENT SHALL THE MULTI-AMP CORPORATION BE LIABLE FOR THE CONSEQUENTIAL DAMAGES DUE TO THE BREACH THEREOF. 0

17 APPENDIX

18 Insert CONNECTION DIAGRAMS pg. through 5 here

19 Insert SCHEMATIC DIAGRAM here

20 INDEX Ammeter...5 CHARTS... Circuit breaker...5 CONNECTION DIAGRAMS... Appendix CONTROLS...5 Ammeter...5 Circuit breaker...5 Current control...5 Current terminals...5 Fuse...5 Output ON/OFF switch...5 Potential terminals...5 Power factor switch...5 Test current switch...5 Current control...5, 7 Current terminals... 5, 6 DEMAND METER TEST...8 DESCRIPTION OF CONTROLS...5 FULL LOAD TEST...7 Fuse...5 INTRODUCTION TO TESTING WATTHOUR METERS...ii LIGHT LOAD TEST...8 OPERATING...7 Current control...7 Output ON/OFF switch...7 Power factor switch...7, 8 Test current switch...7, 8 Output ON/OFF switch...5, 7 Potential terminals... 5, 6 Power factor switch... 5, 7, 8 POWER FACTOR TEST...8 SAFETY PRECAUTIONS... 4 SCHEMATIC DIAGRAM... Appendix Service and Repair Order Instructions...9 Servicing...9 TABLES... Test current switch... 5, 7, 8 Warranty Statement...0 WATTHOUR METER TEST FORMULAS...8

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