Megger MOM690 User Manual
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Megger MOM690 User Manual

Micro-ohmmeter
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MOM690
Micro-ohmmeter
User's Manual
Art No. ZP-BB05E
Doc. BB0220IE
V06a
2019

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Summary of Contents for Megger MOM690

  • Page 1 MOM690 Micro-ohmmeter User’s Manual Art No. ZP-BB05E Doc. BB0220IE V06a 2019...

  • Page 2: Table Of Contents

    4.3 Application examples ........12 Measuring resistance in a breaker ...... 12 Measuring resistance at bus-bar joints ....12 4.4 Software ............13 4.5 Troubleshooting ..........13 5 Specifications __________________________________ 14 Specifications MOM690 .......... 14 Cable sets – load currents ........15...
  • Page 3 © 2010-2017, Megger Sweden AB. All rights reserved. The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every reasonable attempt to ensure the completeness and accuracy of this document.

  • Page 4: Introduction

    This abnormal heating reduces conductivity thereby accelerating the rise in temperature — and this often leads to serious trouble. The MOM690 can be used to detect such problems early so that they can be remedied long before trouble starts. Checking contact resistance at regular intervals provides a clear indication of the state of your system.
  • Page 5 2 SAFETy BB0220IE ZP-BB05E MOM690...

  • Page 6: Safety

    REACH article 33, through their current transformer. SVHC-list Never open a circuit breaker while a MOM690 is connected to it. This product contains a coin cell battery which con- The outputs DC+ and AC must not be loaded at the tains 1,2- dimethoxyethane (CAS 110-71-4) above same time.
  • Page 7 60245. Mains supply cables certified or approved by a recognized testing authority are regarded as meet- ing this requirement. refer all servicing to Megger authorized personnel. If you need to return the instrument, please use ei- ther the original crate or one of equivalent strength.

  • Page 8: Control Panel

    4. Switch for mains voltage 14. Serial interface for PC (RS 232) 5. Variable transformer 6. AC current output (–) 7. AC/DC current output 8. DC current output (+) 9. Sensing terminal ⓮ ❿ ⓬ ⓭ ⓫ MOM690 ZP-BB05E BB0220IE...

  • Page 9: Display

    Note Values stored in memory vanish when you Press the <FUNC>-key to enter the "AUTO" turn of the MOM690. or "MAN"mode. While holding down the <▲>-key, press the Save values permanently <FUNC>-key.

  • Page 10: Operating Instructions

    4 OPErATINg INSTrUCTIONS Operating instructions 4.1 Connection setup Connect the MOM690 to the mains and switch it on. Important Note Since power consumption is high, the instru- ment requires a 16 A fuse. Read the manual and comply with the Safety instructions, see page 6, before Select "AUTO"...

  • Page 11: Operating

    When you the current and hold the measured values. hear them, you should reduce the current or press the <Ω>-key. "O.L.!" will appear on the display. Turn off and disconnect the MOM690 from O.L.! 420A DC On the mains before doing any disconnection work or moving any cables or wiring.

  • Page 12: Application Examples

    DC and to measure voltage. mode". Calculate the actual resistance yourself. Turn off and disconnect the MOM690 from Example: If the voltage drop is 0.0067 V at the mains before doing any disconnection a current of 100 A, the resistance will be work or moving any cables or wiring.

  • Page 13: Software

    4 OPErATINg INSTrUCTIONS 4.4 Software 4.5 Troubleshooting A PC program is available as an accessory. The PC is connected via the serial port on the MOM690. Us- Fault Cause Remedy ing a Windows program named MOMWin, you can The display pre-...

  • Page 14: Specifications

    5 SPECIFICATIONS Specifications Specifications MOM690 Max. load resistance / current, 115 V model Cable set Standard Standard Standard 2 x 15 m Specifications are valid at nominal input voltage and an ambient + Ext. 1 + Ext. 2 95 mm²...

  • Page 15: Cable Sets - Load Currents

    600 A (1 MOM 690 for 230 V (2 MOM 690 for 115 V Ext. 1 = 2 x 5 m (16.4 ft) Ext. 2 = 2 x 10 m (32.8 ft) 50 mm 50 mm BB0220IE ZP-BB05E MOM690...
  • Page 16 ▪ Insulation Power Factor (C&DF) Test Equipment worldwide. ▪ Insulation Resistance Test Equipment Megger is certified according to ISO 9001 and 14001. ▪ Line Testing Equipment Megger is a registered trademark. ▪ Low Resistance Ohmmeters ▪...

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