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Compliance West MegaPulse 1.2x50-12.3PF-1 Instruction Manual

Impulse tester 500ohm 0.5j
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MegaPulse
IMPULSE TESTER
1.2x50-12.3PF-1
500ohm 0.5J
Instruction Manual

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Summary of Contents for Compliance West MegaPulse 1.2x50-12.3PF-1

  • Page 1 MegaPulse IMPULSE TESTER 1.2x50-12.3PF-1 500ohm 0.5J Instruction Manual...
  • Page 2 To fully appreciate all the features of your new instrument, we suggest that you take a few moments to review this manual. Compliance West USA stands by your instrument with a full one-year warranty. If the need arises, please don't hesitate to call on us.

  • Page 4: Table Of Contents

    Table of Contents An Introduction to Impulse Testing with the MegaPulse PF series tester ...........2 Safety Precautions ........................2 Using the MegaPulse Impulse Tester ...................3 Introduction ..........................5 Specifications ..........................5 Operation ..............................9 Setting up your Tester ........................9 AC Line Voltage Requirements....................9 Fuse Replacement.........................10 Front and Rear Panel Features ......................10 Setting the Peak Output Voltage ....................14 Initial Checkout Procedure ......................15...

  • Page 6: An Introduction To Impulse Testing With The Megapulse Pf Series Tester

    Section 1 An Introduction to Impulse Testing with the MegaPulse PF series tester The impulse test is designed to simulate impulse surges which occur in everyday life due to nearby lightning strikes, switching transients, and other high-frequency faults on the power distribution network.

  • Page 7: Using The Megapulse Impulse Tester

    Safety Techniques The high voltage circuit of the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J can be shut off at any time by turning OFF the rear power switch. Always press TRIGGER to discharge the tester before turning OFF. The MegaPulse tester is provided with a digital VOLTAGE ADJUST knob on the front panel.
  • Page 8 Pressing the POLARITY switch on the front panel can change the polarity of the output waveform. The polarity is Normal when the NOR indicator is lit. In this case, the high voltage will appear on the OUTPUT as a positive pulse relative to the RETURN jack. When the polarity switch is in the Reverse position (REV indicator is lit), the high voltage will appear on the OUTPUT as a negative pulse relative to the RETURN jack.

  • Page 9: Introduction

    Your tester is warranted for a period of one year upon shipment of the instrument to the original purchaser. Specifications Specifications for the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J are listed in the Error! Reference source not found. below and the component designations are shown in Figure 1 Figure 1.
  • Page 10 Figure 2. Annex C from IEC 60255-5 Note that the tolerance of R2 and C2 are 1% as specified, however the component values of R1 and C1 may be modified to account for secondary circuit effects in order to generate the specified output waveform, which is described in , as copied from IEC 60255-5.
  • Page 11 Methods of calculation of front time (T ) and time to half-value (T ) are as specified in IEC 61180-1, shown in Figure 4 Figure 4. Waveform time measurements from IEC 61180-1 Recommended test voltages and tolerance on peak voltage are as specified in IEC 60255-5 section 6.1.3.3, which is shown in Figure 5...
  • Page 12 Figure 5. Test Voltages and Tolerance from IEC 60255-5...

  • Page 13: Operation

    Your Tester is shipped in a special protective container that should prevent damage to the instrument during shipping. Check the shipping order against the contents of the container and report any damage or short shipment to Compliance West USA. The container should include the following: The MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J Tester...

  • Page 14: Fuse Replacement

    Fuse Replacement There is a user-replaceable fuse (F1) located on the rear panel of the instrument. It is located behind a door in the Power Inlet-Power Switch-Fuse Holder device. The fuse rating is noted on the rear panel. Do not attempt to replace it with a fuse of any other rating. Use the following procedure to replace the fuse F1: Turn the power switch to the OFF position.
  • Page 15 Figure 6. Controls, Indicators, Connectors – MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J Front Panel (image for reference only)
  • Page 16 Used to select the waveshaping network components that are specified for each nominal output voltage. Refer to Table 1 for additional details. (optional, switch just in case that multiple output was ordered) Table 2. Controls, Indicators, Connectors – MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J Front Panel...
  • Page 17 Figure 7. Controls, Indicators, Connectors – MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J Rear Panel (image for reference only) ITEM NO. NAME FUNCTION Use supplied cordset to connect the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J tester to an appropriate Appliance Inlet / Fuse holder / source of supply.

  • Page 18: Setting The Peak Output Voltage

    Setting the Peak Output Voltage Select the desired output using the Output switch (if apply, item 11). Adjust the output Figure 6 voltage setting using the Voltage adjust knob ( item 1) to the voltage specified in Figure 6 Table 4 Note that the front panel meter reads the voltage of C1.

  • Page 19: Initial Checkout Procedure

    Initial Checkout Procedure The following procedure will verify that the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J tester is working correctly. We recommend that this procedure be conducted periodically to ensure proper operation of the tester. The following items are needed to conduct this procedure: A measuring instrument to monitor the output waveform.

  • Page 20: Testing

    Figure 8. Waveform Measurement Setup. Testing This section describes how the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J tester is used to conduct a test. The test can be stopped immediately at any time by turning OFF the rear-panel power switch. Connect the tester to a proper source of supply using the included 18 AWG power supply cord.
  • Page 21 Push the yellow CHARGE button. Verify the red TRIGGER indicator is now lit. 8. Push the red TRIGGER button, when the desired voltage is displayed on the front panel meter. Note that the peak amplitude of the measured output waveform is proportional to the voltage that is read of the front panel of the MegaPulse, but it will always be somewhat lower.

  • Page 22: Technical Assistance

    Section 4 Technical Assistance Technical Assistance from Compliance West USA is available: Phone: (800) 748-6224 Hours: 8:00 AM - 4:00 PM Pacific Time. Also available on our web site at: www.compwest.com Contact: Compliance West USA 650 Gateway Center Way, Suite D San Diego, CA., 92102...

  • Page 23: Maintenance And Calibration

    INSTRUCTIONS. Introduction This section of the manual contains maintenance information for the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J impulse tester. A 1-year calibration cycle is recommended to maintain the specifications of the factory. The test equipment required for the performance test is a digital oscilloscope, high voltage oscilloscope probe, digital meter and a high voltage probe.

  • Page 24: Calibration Information

    Compliance West USA. Voltage Stop Disable / Keyboard Enable by Keyboard. If the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J tester includes TestMinder option and has the Voltage Stop by the PC command activated, it is possible to disable it using the next keyboard sequence: Note: Disabling Voltage Stop enables the keyboard.

  • Page 25: Impulse Testing Waveforms And Relay Performance

    Appendix A Impulse Testing Waveforms and Relay Performance Background: Over the years, Compliance West USA has used a number of different relays to switch impulse waveforms. Relay choice varies depending primarily on the voltage that is being switched, and the maximum current than can flow.
  • Page 26 maintain the arc, the arc will be extinguished. For high-energy impulse tests, there is a large amount of current flowing, which allows the arc to be maintained. Figure A 1 shows a test circuit schematic, Figure A 2 shows the ideal (simulated) output waveform, and Figure A 3 shows the actual output, highlighting the point at which the arc is extinguished.
  • Page 27 Figure A 3. Actual output showing the arc being extinguished as the contact is closing. The reason the output voltage drops more quickly when the ARC is extinguished can be understood by reviewing the circuit schematic in Figure A 1: While there is an arc, C1 is connected in the circuit, and the RC time constant is: (Rc + R2) x (C1 + C3).
  • Page 28 Figure A 4. Arc - extinguish - re-arcing cycle. Because of the circuit topology, these arc-extinguish transients will take place only at the tail of the waveform, when the voltage is less than 50% of the peak output. Because the output is "clean" from the peak to the 50% voltage level, the duration of the waveform is easily measured and calculated;...
  • Page 29 Figure A 5. Breakdown as the voltage is rising.
  • Page 30 Figure A 6. Dieletric breakdown immediately after Vpeak.
  • Page 31 Figure A 7. Dielectric breakdown after Vpeak (delayed breakdown).

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