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User
Manual

* MPRT shown with optional large carry handle

Model MPRT

Megger Protective Relay Tester

Part 710000

Rev 3 Date 11/15/2005

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Содержание MPRT 8415

Страница 1: ...User Manual MPRT shown with optional large carry handle Model MPRT Megger Protective Relay Tester Part 710000 Rev 3 Date 11 15 2005 w w w E l e c t r i c a l P a r t M a n u a l s c o m...

Страница 2: ...for informational use only is subject to change without notice Megger assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual The information and data in t...

Страница 3: ...7 7202 as applicable Consistent with 48 C F R 12 212 or 48 C F R 227 7202 1 through 227 7202 4 as applicable the commercial computer software and commercial computer software documentation are being l...

Страница 4: ...n correct use or safety related topics Refer to the following table of symbols and definitions Symbol Description Direct Current Alternating Current Both direct and alternating current Earth ground Te...

Страница 5: ...ds Always turn the test system off before disconnecting the power cord or removing inserting output modules Turn the power off when removing or inserting the Voltage Current module s DO NOT power up w...

Страница 6: ...4 2 1 V I Generator Module 17 1 4 2 1 1 Voltage and Current Ranges 18 1 4 2 1 1 1 Model 8415 each output module 18 1 4 2 1 1 2 Model 8430 each output module 18 1 4 2 1 2 Frequency Ranges 18 1 4 2 1 3...

Страница 7: ...ew Interface 28 3 2 Setting Phase Angle Relationships 29 3 3 Current Sources 31 3 3 1 Parallel Operation 31 3 3 2 Currents in Series Operation 32 3 3 3 Harmonic Restraint Test 33 3 3 3 1 Basic Harmoni...

Страница 8: ...ferential Relay Test Configuration Screen 73 3 8 4 2 Differential Relay Winding 1 2 or 3 Pick Up Test Results 75 3 8 4 3 Differential Relay Harmonic Restraint Test Results 76 3 8 4 4 Differential Rela...

Страница 9: ...ucer Type 135 3 8 10 4 2 Transducer Description 135 3 8 10 4 3 System Default Settings 136 3 8 10 4 4 Transducer Output 137 3 8 10 5 Manual Transducer Test Screen 139 3 8 10 5 1 MPRT Output Section 13...

Страница 10: ...162 6 4 Calibration Check 163 6 4 1 Checking Transducer DC IN 164 6 4 2 Checking Battery Simulator 164 6 4 3 Checking AC Volts DC Volts 164 6 4 4 Checking AC Amperes DC Amperes 165 6 4 5 Checking AC...

Страница 11: ...o various screens The data should be saved before performing a reset if possible 4 Binary Outputs there are 6 internal to the MPRT Unit Each output can be configured as Normally Open or Normally Close...

Страница 12: ...ation and display outputs when under computer control 1 1 2 Rear Panel Figure 2 MPRT Rear Panel 1 Incoming Power Line Cord the input line cord ground terminal are mounted on the back panel of the test...

Страница 13: ...hase angle and frequency outputs Status of the EPOCH 20 II output can be seen on the TVI display 8 External Clock The external clock has separate input and output connections The Clock In is used in c...

Страница 14: ...Input Terminals CAUTION DO NOT APPLY MORE THAN 10 VOLTS PEAK TO THE EXT INPUT TERMINALS APPLICATIION OF MORE THAN 10 VOLTS PEAK MAY DAMAGE THE AMPLIFIER 1 1 3 Touch View Interface The Touch View Inte...

Страница 15: ...Square UUT Unit Under Test 1 2 2 Glossary of Terms The MPRT TVI display screens prompt the user to select or set various values The values vary depending on the relay under test and the relay setting...

Страница 16: ...at numerical relays also can have reset times to coordinate with electromechanical relays 1 2 2 5 Target Tap Is a numerical value of dc current This value is used when conducting the Target and Seal i...

Страница 17: ...the change is required See section 2 2 for operational details 1 4 Input Power and Control 1 4 1 Input Power The input voltage may be from 100 to 240 VAC 50 60 hertz Input current required varies wit...

Страница 18: ...tput module is able to provide a variable frequency output with the following ranges DC 00 001 to 99 999 100 01 to 999 99 1 4 2 1 3 Phase Angle The phase angle may be set from 0 to 359 9 in either lea...

Страница 19: ...e or voltage is applied to the gate If desired a tone generator horn may provide an audible indication when the contacts close or voltage is applied 1 5 1 1 1 Dry Contacts Open Timer starts stops or a...

Страница 20: ...testing transducers See Section 3 8 10 4 for more description 1 8 Operation of Optional High Current Interface The High Current Interface may be initiated in the Main Menu Screen The High Current Int...

Страница 21: ...g the power up sequence the test system automatically does self test to insure everything is operating properly Once the system has completed its self checks the Introduction screen will appear Figure...

Страница 22: ...ncel will return the user to the previous screen that is in use Pressing Ramp will select that value to ramp when using the control knob Pressing Clear will clear the value you just entered Figure 8 T...

Страница 23: ...3 1 Language The factory default is English but may be changed to French Spanish German Italian or Portuguese Other languages will be added to the list at a later date To change language press the la...

Страница 24: ...ens will allow the Battery Simulator to be powered ON OFF as applicable Pressing the DC Battery Simulator setting button the following selection screen will appear Figure 12 Battery Simulator Voltage...

Страница 25: ...180 In addition the user can set the display for clockwise and counterclockwise rotations The factory default is 0 360 lagging Press the Phase Angle select button and the following screen will appear...

Страница 26: ...neutral This will also be the value used in the prefault settings screen as well some other preset test screens These settings will change once the values are changed by the user in the relay setting...

Страница 27: ...deleted or written over a warning message will alert the operator this action is about to take place This allows the operator to cancel the action 2 2 4 1 Test Files The test files are used to verify...

Страница 28: ...that value to ensure a value is entered that resides within the tolerance of the range 2 5 Advanced Visual Test Software AVTS AVTS is external software specifically constructed to work with Megger re...

Страница 29: ...t be referenced to the 0 This is for operator convenience only When setting an angle the operator has a multiple of choices depending on the Default Phase Angle setting in the Default Setting Screen s...

Страница 30: ...by 30 Conversely if the angle decreases in the counterclockwise direction from 359 9 toward 0 0 for a setting angle of 300 0 the second output would look like The reference output is 0 and the second...

Страница 31: ...m that channel By connecting the commons together all of the current channels would then have a common reference point For the grounded common return units there is an internal common ground between t...

Страница 32: ...igh multiples of tap due to the winding impedance and saturation characteristics The peak voltage required can exceed the maximum output voltage of one MPRT current output channel depending on the req...

Страница 33: ...monic restraint tests the first method uses a pure harmonic 2nd 3rd 5th etc of the fundamental from one current channel summed with the fundamental current from a second current channel at the relay T...

Страница 34: ...to the appropriate harmonic current It is recommended that 1 0 ampere of harmonic current be set it will make the math easier If using the HWAVE set the displayed current to 8 89 amperes RMS this equa...

Страница 35: ...ally the timer is automatically started with fault voltage applied to the relay under test First set the normal voltage on the relay then with the relay energized to normal condition set the desired f...

Страница 36: ...Open Delta configuration the desired phase to phase fault voltage V1f is set using voltage channel 1 with its phase angle set to 0 Phase to phase voltage V2f and its phase angle relationship for volta...

Страница 37: ...is easier to use when obtaining an unbalanced phase to phase fault simulation since it eliminates calculations To reduce confusion when using the T Connection the voltage output 1 is designated Va and...

Страница 38: ...Balanced or Unbalanced Fault T Connection f V Desired Fault Voltage a f V 1 2 V 0 180 V 2 1 V f b c c V 3 2 120 or V 104V 270 38 w w w E l e c t r i c a l P a r t M a n u a l s c o m...

Страница 39: ...ith its phase relationship set for 0 Voltage channel 2 is then designated as Vb and phase angle set for 120 Finally voltage channel 3 is designated Vc and phase angle set for 240 for a 1 2 3 counter c...

Страница 40: ...ime in cycles The generator output returns to the Pre fault Value The time the relay remains at this level is determined by the Delay Time minus the Pulse Time The next pulse is increased by the incre...

Страница 41: ...first ramp is performed by incrementing the angle CW with the next ramp being incremented CCW The test will use these two measurements to calculate the angle of torque Measured CW Torque Calculated An...

Страница 42: ...If the fault value is greater than the pre fault value then the ramp is incremented up from the pre fault value There isn t any change to the generator outputs during pre fault 60 00 Hz Time Fault Fre...

Страница 43: ...ing set an angle of 340 on voltage channel 2 0 V1 V2 90 180 90 Increase Phase of V2 Relay Contacts Close Breaker Contacts Close Auto Synchronizing Relay 3 5 7 Pickup The pickup test performs a Ramp or...

Страница 44: ...ed the user may manually enter a value s and associated trip time s in the appropriate value windows 3 5 10 Harmonic Restraint This test uses two current generators The generators are in phase while t...

Страница 45: ...ng all the timer input and output setting parameters Basic Timer Setup Menu Figure 26 Basic Timer Setup Menu Description Controls Contact The Contact label identifies which input terminal the associat...

Страница 46: ...operate before the outputs are turned off This function is only applicable when the timer is operating Debounce Time Determines how long a contact must be in a true state before the condition is dete...

Страница 47: ...set to 24 48 125 or 250 volts DC with the factory default set at 125 VDC This establishes the voltage values but does not turn the Battery Simulator power ON The various test setup screens will allow...

Страница 48: ...The Pre set test screen option provides a variety of preset relay specific test routines The File Manager allows access to the stored data files The System Config button allows changes to the system...

Страница 49: ...t Menu Select the relay type to undergo testing Once selected the display will move to that set of relay setting and test screens The File button takes the user to the File Management Screen The Main...

Страница 50: ...f an Impedance or Distance relay These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons File This selection will take the...

Страница 51: ...s with a range of 0 to 9999 milliseconds The factory default value is 100 milliseconds The Zone button is used to select the test label The unit tests a single zone at one time and has the information...

Страница 52: ...ions Pulse Ramp uses all screen values The Pulse Time is the length of time the fault value will be applied The range is from 1to 9999 cycles The Delay Time is the cumulative of fault and fault recove...

Страница 53: ...y Pre fault Setting Screen This screen sets the relay values before fault values are applied to ensure the relay is properly energized Figure 33 Pre Fault Setting Screen The voltage range is 0 00 to 1...

Страница 54: ...e controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Apply This button will set and apply the pre fault values 3 8 2 4 Impedance Relay Reach Test R...

Страница 55: ...message should be displayed to notify the factory default values are being used The Relay Settings button will move to its screen and allows changes to the relay specifications The Timer Setup screen...

Страница 56: ...Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button wil...

Страница 57: ...ection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and beg...

Страница 58: ...generators enabled This is indicated by a check mark in the channels selection boxes If the Voltage is held constant the Stop value is expressed in Amps If the Current is held constant the Stop value...

Страница 59: ...completion The Zone and Fault values are copied from the setting screen while all other values are calculated from the test results The results of the test will be displayed as Test Passed or Test Fa...

Страница 60: ...e set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 60 w w w E l e c t...

Страница 61: ...take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Me...

Страница 62: ...he various screens Figure 40 Overcurrent Relay Test Menu Screen These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons Fi...

Страница 63: ...l change screens and will allow changes to meet the manufacturer s specifications Relay Tap Time Dial Instantaneous Tap Reset Time Target Tap IEEE IEC curve type and test multiple s need to be set unl...

Страница 64: ...field is in increase per 10 cycles The default value for this field is 02 of pickup Example If the pickup value requires 1 0 ampere the MPRT will increase the current magnitude 0 0002 amperes every 1...

Страница 65: ...p Specifications Increment 100msec This value is used to control the how fast the MPRT will increase the current to determine the pickup value for the target and seal in The value input into this fiel...

Страница 66: ...will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the...

Страница 67: ...ager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return...

Страница 68: ...e controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Sta...

Страница 69: ...Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the contr...

Страница 70: ...in the memory as can be seen in the figure below Figure 48 Overcurrent Timing Test Result Screen 3 8 4 Differential Relay Test Menu This menu permits the setting and testing of a differential relay T...

Страница 71: ...erforming the test The factory defaults may be used to test a relay generically The following is a description of the buttons of the Relay Settings screen Winding Tap The user enters the tap value for...

Страница 72: ...lue is 20 Amperes Target Tap The Target Tap has selectable values with a factory default of 0 2 DC amperes Relay Model Cal The Westinghouse HU relay requires a different calculation for harmonic restr...

Страница 73: ...The default value for this field is 1 of pickup Example If the pickup value requires 1 0 ampere the MPRT will increase the current magnitude 0 01 amperes every 10 cycles until the relay contacts clos...

Страница 74: ...value is used to control the how fast the MPRT will increase the current to determine the pickup value for the target and seal in The value input into this field is in increase per 100 msec The defau...

Страница 75: ...n the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also t...

Страница 76: ...e test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the...

Страница 77: ...p Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the...

Страница 78: ...tion will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin...

Страница 79: ...le This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the T...

Страница 80: ...t Test Screen This test requires two current channels A link to Timer Setup configuration is be available on this screen Also the Timer Setup configuration is displayed for convenience For this test t...

Страница 81: ...the test itself consists in applying a large amount of current for a very short time The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Of...

Страница 82: ...further define the tests to be performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons File This selection will take the...

Страница 83: ...etup screen allows the user to define how the time will be used The IEC curves are algorithms and must be selected by the operator using the Time Curve pull down button For inverse time curves the IDM...

Страница 84: ...en Main Menu This selection will return the controller to the Main Menu 3 8 5 2 Voltage Relay Pickup Test Results This screen displays the results upon test completion No data may be entered in this s...

Страница 85: ...Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quant...

Страница 86: ...ns The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu T...

Страница 87: ...g error calculation must be performed based on the actual trip time versus the theoretical time from the time curve algorithms or from the definite time window 100 Time l Theoretica Time l Theoretica...

Страница 88: ...e set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 88 w w w E l e c t...

Страница 89: ...al options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons File This selection...

Страница 90: ...ctory defaults are used The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator O...

Страница 91: ...on will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen...

Страница 92: ...erform this test let voltage channel 2 V2 provide the slip frequency generator and let voltage channel 1 V1 provide the fixed voltage frequency source bus Connect the relay s closing contacts to Timer...

Страница 93: ...on will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen...

Страница 94: ...and testing of a Power relay These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons File This selection will take the use...

Страница 95: ...est at the top of the screen Pickup The Pickup button will take the user to the Pickup Test Menu Timing The Timing button will take the user to the Timing Test Menu Target Seal In The Target Seal In b...

Страница 96: ...Y connections Another is for loss of excitation relay calibrated in Watts In the Power Relay Setting Screen the Normal Volt is the desired test voltage per phase Under most single phase applications t...

Страница 97: ...le relationship recommended by the manufacture is 0 Therefore If the relay pickup setting is 1800 Watts and the relay voltage is 120 Volts then we would expect the relay to operate at about 5 0 Ampere...

Страница 98: ...ult test parameters that should not need to be adjusted by the user If the user has determined these values do need to be adjusted then following the directions in the TVI Operations section Figure 70...

Страница 99: ...control how long the output pulse is off during an Instantaneous pickup test This value is not used on Power Relays Target Seal In Ramp Specifications Increment 10 cycles This value is used to control...

Страница 100: ...he current will automatically ramp up until the relay operates or in case of a solid state relay the LED lights up indicating pickup The pickup Watts will be displayed in the Watts box The formula use...

Страница 101: ...get and Seal in Test The Timing and Pickup test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Ba...

Страница 102: ...Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop th...

Страница 103: ...52b contacts again apply current again and look for lockout This will be repeated for the total number of operations selected in the setup screen For electro mechanical relays set the current to zero...

Страница 104: ...be one less than the No of Operations The time setting for Reclose Time will be the same for each operation The lockout time is the time that a lockout should occur unless a trip has occurred again Th...

Страница 105: ...selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Men...

Страница 106: ...Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to...

Страница 107: ...of the binary output contacts The MPRT will also need to have the Binary Input contacts programmed for sensing the relay Trip Contacts and the Reclose Contacts The purpose of the timing test is to mea...

Страница 108: ...the reclose operation Trip and Reclose In this case as well as the electronic ME recloser two tests are normally performed One test is the pickup test or minimum operation point This test is performed...

Страница 109: ...the timer records R1 reclose time and after a preset time delay of 0 040 seconds simulates the closing time of the breaker toggles the Output Contacts back to the original start state breaker closed...

Страница 110: ...reen 1 Select Relay Settings The following screen should appear The Relay Tap Time Dial and Test Multiple should be set to zero see Testing Distribution Relays with Reclosing for use of these inputs S...

Страница 111: ...e Therefore allow this time plus an additional second or two for the relay to totally lockout At the end of the Lockout Time any voltage output set in the setting screen will be removed from the relay...

Страница 112: ...imulate the circuit breaker 52B and 52A contacts Pressing the X changes the contact to open indicated by the number 0 Pressing again changes it to be closed indicated by the number 1 During the Fault...

Страница 113: ...his will take you to the Reclose Timing Test Screen Press the Start Button in the lower left corner see Figure below The test set closes the 52A contacts and opens the 52B contacts simulating the firs...

Страница 114: ...contacts will toggle to simulate the breaker reclose and will be repeated as programmed in the Relay Specifications Screen Connect I1 output terminals to the appropriate relay current input terminals...

Страница 115: ...d be to look at BINARY INPUT 1 and wait for the trip contacts to close When the relay trip contacts close the trip time is recorded the output current is turned off and the BINARY OUTPUT contacts will...

Страница 116: ...will appear in the Test Screen as the Reclose Time However if there is a problem with the relay which prevents the relay from reclosing the breaker then the test set will wait until the Lockout Time h...

Страница 117: ...p and Reclose Test Results 16 When the relay goes to lock out the test is stopped and the total number of operations is displayed including Trip Times and Reclose Times 117 w w w E l e c t r i c a l P...

Страница 118: ...one set point set the time dial and step For solid state relays there may be multiple set points used multiple timing either step and or ramp that may be a single or double step ramp A double step ram...

Страница 119: ...y will require a fault frequency and trip time to calculate the relay theoretical reclose The measurement is the delta frequency divided by the delta time where the setting can be either a ramp rate o...

Страница 120: ...e the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu...

Страница 121: ...ake the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Men...

Страница 122: ...Main Menu button returns the user to the main screen menu If the Main Menu button is selected the test will be stopped and will return the generators to an inactive state 3 8 9 4 1 Dynamic Frequency...

Страница 123: ...the selected fault frequency The DURATION Time should be set slightly longer than the operating time of the relay 6 Set the F1 rate of change Ramp Rate 1 For example if you wish to ramp the output fre...

Страница 124: ...performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons The File button stores the present test values or reloads the pr...

Страница 125: ...rent modes 1 This screen can apply set values to visually watch the response of the relay or the unit can apply set values and start the timer and wait a response time from a protective relay 2 This s...

Страница 126: ...reaches a true condition or when the Fault Duration has elapsed If the Reclose Duration is something other than zero the Reclose Timer will start when the unit progresses from the Fault to the BKR Tr...

Страница 127: ...rrent phase angle or frequency with the Duration time These values will be applied to the device under test during the Prefault Duration time and will then switch to the Fault Settings The Fault Setti...

Страница 128: ...e response of the relay or the unit can apply set values and start the timer and await a response time from a protective relay This screen can also simulate a three state conditions Prefault Fault and...

Страница 129: ...in a true condition Duration A Duration time can be selected for each Prefault Fault and Postfault state If the Duration time is set for zero the unit will skip that state The Prefault button With Dy...

Страница 130: ...te four fault conditions Prefault Fault and Postfault and progress through each state condition The Timer will start when the unit progresses from the Prefault to the Fault condition and will stop whe...

Страница 131: ...the TIMER will start If using a Step Function the TIMER Start Frequency must be equal to the FAULT Frequency 4 Select Postfault values by pressing the Postfault Settings button Set the desired Postfau...

Страница 132: ...tion This screen can apply set values to visually watch the response of the relay or the unit can apply set values and start the timer and await a response time from a synchronizing relay Controls V1...

Страница 133: ...ed Closing Time Test for more details File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Manual Test Menu Thi...

Страница 134: ...ng time for auto synchronizing relays 1 Connect the relay s closing contacts to Timer Start Terminal 1 first pair of Binary Input terminals so that when the relay contacts close at the advance angle i...

Страница 135: ...e number of elements will automatically select the appropriate number of output voltages and currents needed to test the selected transducer For example selection of a single element Watt transducer V...

Страница 136: ...ected in the Transducer Test Screen Current The current value will automatically default to the value set in the System Default Screen However it should be noted that if the operator chooses Watt VAR...

Страница 137: ...the appropriate window and a numeric keypad will appear to enter the appropriate value s In our example the transducer is a Watt transducer When Watt 3 Element was selected in the Select Transducer T...

Страница 138: ...e Power Factor transducers are rated to 0 015 PF then we need to carry out the Power Factor to three decimal places or 001 Therefore if the transducer had a measured output of 9 500 mA then the equvil...

Страница 139: ...selected for the user For example if an AC Voltage or Current transducer had been selected the V1 or I1 outputs will have changed from grey to green and the defaulted voltage or current would appear T...

Страница 140: ...e voltage or current Input the transducer s accuracy value 4 Adjust the system default settings if required and enter the transducer s settling or response time in milliseconds 5 Press the Test Screen...

Страница 141: ...ngle will be 0 zero degrees the calculation is simple The formula required to calculate Watts is V1 I1 COS 0 Watts Example The default voltage is 120 00 Volts AC and the user inputs 500 Watts as Max V...

Страница 142: ...rent to test The MPRT will automatically select the first voltage and current channels available V1 and I1 The test will initially start at the default values for voltage and current that are set in t...

Страница 143: ...s equal to the full scale Power Factor of 0 5 Therefore the theoretical range of output from the transducer would be 0 5 Power Factor if the output current is 1 milliampere to 0 5 Power Factor if the...

Страница 144: ...Value The current required for full scale output from the transducer is 120 I1 COS 0 120 I2 COS 0 1000 Watts Since each phase contibutes half of the power we can simplify to I1 500 Watts 120 Volts or...

Страница 145: ...MPRT will automatically select two voltage and current channels V1 V3 I1 and I3 in the event that there is no V3 I3 channel then V2 and I2 will be used The test will initially start at the default vol...

Страница 146: ...COS 30 120 00 2 793 COS 30 1005 48 Watts For this example let s assume the measured output current from the transducer is 1 001 mA dc Based on a Max value of 1 mA equals 1000 Watts the displayed Watts...

Страница 147: ...value in the Transducer Setting Screen the firmware can calculate the required test currents for full scale value The formula required to calculate Watts for 2 1 2 Element transducer is V1 I1 COS V3...

Страница 148: ...reen should read 1507 5 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 1507 5 1500 10 1500 10 100 accuracy or 0 493 If this were a 0 5 transducer then th...

Страница 149: ...remental angular change between V1 and I1 V2 and I2 V3 and I3 Example The default voltage is 120 00 Volts AC and the user inputs 1500 Watts as Max Value The current required for full scale output from...

Страница 150: ...justs the phase angle in the lagging direction by 30 then the Watts output changes Using the formula V1 I1 COS V2 I2 COS V3 I3 COS Total Watts Where is the incremental angular change of 30 between V1...

Страница 151: ...voltage and current will be considered lagging current lags voltage In this situation the typical test angles may vary between 0 to 90 degrees lag and 359 9 to 270 degrees lag 90 degrees leading This...

Страница 152: ...perator is required to select what type of transducer is to be tested Once selected the internal firmware of the MPRT unit will make certain assumptions and calculations based on the type of transduce...

Страница 153: ...ulations are very similar when testing DC Voltage transducers 3 8 10 8 2 AC and DC Current Transducers The single phase AC or DC current transducer requires 1 current to test The MPRT will automatical...

Страница 154: ...in the Default Setting Screen For example 120 Volts L N 60 0000 Hz When the user inputs the MAX Frequency value in the Transducer Setting Screen the firmware will calculate the required test frequenc...

Страница 155: ...in the Transducer Output section would be equal to the following 65 0065 65 0000 65 0000 100 accuracy or 0 01 If this were a 0 02 transducer then the firmware would compare the accuracy values between...

Страница 156: ...th the voltage channels converted to currents I5 correlates to current channel I12 I6 correlates to current channel I13 and I7 correlates to current channel I14 To assign channels from the Main Menu p...

Страница 157: ...with up to eight channels that equals over 2 million samples Using the RS 232 port would take several minutes to down load at a 9600 baud rate The MPRT has selectable baud rates up to 115 200 which w...

Страница 158: ...ress the Soft Firm Update button Press the Update Check button The MPRT will then look for the FTP server Upon finding the server the MPRT will present the user a Upgrade Monitor Screen which will ind...

Страница 159: ...rranty will be void 6 3 1 Basic Troubleshooting The troubleshooting information relies on the technician to have a through understanding of the operation of the unit If the technician is unfamiliar wi...

Страница 160: ...plug line cord before attempting to reseat any module Observe proper ESD procedure Re seating Voltage Current VI Gen Amplifier Module To reseat the module in the chassis A Disconnect the power cord fr...

Страница 161: ...the gate circuit can be as much as 4 milliseconds The total timing variation can be as much as 8 milliseconds The shorter the duration of the timing test the more significant the variation becomes The...

Страница 162: ...roper output If output does not change peer through the air intake slots on the top to observe the VI Gen LED s Each module has some LED s that stay on continuously and some that blink If there are no...

Страница 163: ...bove for extended test periods It is also recommended that current measurements start on the low range first and progress to the higher ranges For best results it is also recommended that the amplifie...

Страница 164: ...00 6 4 2 Checking Battery Simulator From TVI Main Menu select System Config button Select Battery Simulator button and select 24 Volts Connect the DC Multimeter to the Battery Simulator output termina...

Страница 165: ...put channel Enter 0 for the frequency and the Freq window will change to DC To set an output value press the Magnitude window Set the output to the desired voltage as listed in the following Table and...

Страница 166: ...Output Current Measured Output Range Setting Tolerance UUT MIN MAX 6 0A 0 6 20ma 0 58 0 62 3 0 20ma 2 98 3 02 6 0 20ma 5 98 6 020 15 0A 7 5 0 25 7 4625 7 5375 15 0 1 0 25 14 9625 15 0375 30 0A 30 0 1...

Страница 167: ...1 0 05 degrees must be added to the total allowable error the North Atlantic Phase Angle Meter measures angles between two voltages with an error of 0 0125 Degrees MPRT readings will be displayed on...

Страница 168: ...Frequency Measured Output Setting Hz Tolerance UUT MIN MAX 120 V 10 25 ppm 9 99975 10 00025 50 25 ppm 49 99875 50 00125 60 25 ppm 59 9985 60 00150 100 25 ppm 99 9975 100 0025 1000 25 ppm 999 975 1000...

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Содержание MPRT 8415

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