Megger HVB 10 User Manual
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Megger HVB 10 User Manual

High voltage measuring bridge
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HVB 10
High Voltage Measuring Bridge
USER GUIDE
Issue:
04 (01/2019) - EN
Article number:
83041
1

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Summary of Contents for Megger HVB 10

  • Page 1 HVB 10 High Voltage Measuring Bridge USER GUIDE Issue: 04 (01/2019) - EN Article number: 83041...

  • Page 3: Consultation With Megger

    E: team.dach@megger.com  Megger All rights reserved. No part of this handbook may be copied by photographic or other means unless Megger have before-hand declared their consent in writing. The content of this handbook is subject to change without notice. Megger cannot be made liable for technical or printing errors or shortcomings of this handbook.

  • Page 4: Terms Of Warranty

    During the period of warranty, Megger agree to repair faulty parts or replace them with new parts or parts as new (with the same usability and life as new parts) according to their choice.

  • Page 5: Table Of Contents

    Contents Contents Consultation with Megger ....................3 Terms of Warranty ......................4 Contents ........................... 5 Safety Instructions ................... 7 Basic Notes ......................7 General Safety Instructions and Warnings ............8 Technical Description ..................10 System Description ..................10 Technical Data ....................12 Connections, Controls and Display ..............

  • Page 7: Safety Instructions

    This handbook contains basic instructions for the commissioning and operation of the Safety precautions HVB 10. For this reason, it is important to ensure that the manual is always available to authorised and trained personnel. Operating personnel should read the manual thoroughly.

  • Page 8: General Safety Instructions And Warnings

    Megger products in direct contact with water, aggressive substances and inflammatory gases and vapours is prohibited. The HVB 10 is built to be robust and can withstand the stresses it can expect to be subjected to in demanding everyday use. Nevertheless, it is a precision measuring device which needs to be treated with the appropriate care.
  • Page 9 If, contrary to the regulations, any other extinguishing agent is used for fire fighting, this may lead to damage at the electrical installation. Megger disclaims any liability for consequential damage. Furthermore, when using a powder extinguisher near high-voltage installations, there is a danger that the operator of the fire extinguisher will get an electrical shock from a voltage arc-over (due to the powder dust created).

  • Page 10: Technical Description

    Function To test the integrity of the inner cable insulation or the sheath, the HVB 10 works in test mode with a voltage of up to 10 kV kV (negative polarity). The prelocation of a detected fault takes place using the voltage drop method, in which the current, voltage and resistance before and after the fault location are determined and considered in relation to the cable length.
  • Page 11 Technical Description The HVB 10 combines the following features in a single device: Features Easy and comfortable operation via rotary encoder (EasyGo) and touch screen • Bipolar measurement • Two prelocation modes to cope with the different (fault type dependant) •...

  • Page 12: Technical Data

    Technical Description The following optional accessories can also be ordered from Megger Sales: Optional accessories Accessory Description Item number Connection set for HV Connection set with 8 larger connection 1003344 cable terminations clamps (e.g. for HV cable terminations) and connection cables 2 m in length (for the...
  • Page 13 Technical Description Parameter Value Memory 2 GB flash memory for system and user data Data logging with a USB stick Operating temperature −25 °C ... +55 °C Storage temperature −40 °C ... +70 °C Operating humidity max. 93% relative humidity Dimensions (W x H x D) 500 x 457 x 305 mm Weight...

  • Page 14: Connections, Controls And Display

    “HV OFF” push-button Rotary encoder Protective earthing connection HV output The HVB 10 generates a dangerous voltage of up to 10 kV during HV operation. This is induced into the HV connection cable through the HV output. WARNING Power supply socket with fuses F1 / F2 (2 x M6.3/250) 12 …...

  • Page 15: Commissioning

    • suitable earthing point (e.g. station earth). Inadequate protective earth, especially when operating the HVB 10 by battery, can raise the potential of the device, and the hazardous voltages produced make it unsafe to handle.

  • Page 16: Electrical Connection In Fault Prelocation Mode

    Commissioning Electrical Connection in Fault Prelocation Mode The following figure shows the simplified connection diagram: Connection diagram 88 V … 264 V, Connecting method for sheath fault location 50 / 60 Hz Connecting method for a fault between inner conductor and shield Connecting method for a fault between two adjacent conductors of a multicore cable Observe position / order...
  • Page 17 If the unit is to be powered through the mains, connect the supplied mains power cable to the power supply socket of the HVB 10 and a mains socket. Otherwise, the device on being switched on is automatically powered by the internal battery.

  • Page 18: Electrical Connection In Testing, Burning And Pinpointing Mode

    Commissioning Electrical Connection in Testing, Burning and Pinpointing Mode In testing, burning and pinpointing mode, all connecting leads except of the yellow one have to be connected to the conductor to be testes or faulty conductor respectively. Inner conductor testing / inner conductor fault burning Sheath testing or sheath fault burning / pinpointing When testing cable systems for which the probability of a fault is very low, all conductors to be tested can be bridged and tested in a single step, without having to reconnect.

  • Page 19: Electrical Connection: Special Applications

    Commissioning Electrical Connection: Special Applications This method of prelocating a fault should only be used when absolutely unavoidable, Prelocation using one auxiliary conductor only e.g. when no second, fault-free auxiliary conductor is available. The precision will be impaired in the same way as the simple Murray loop bridge is impaired by the effects of the contact resistances, but should remain comparatively higher.
  • Page 20 Commissioning Under certain circumstances, prelocation can also be performed on a spooled cable Prelocation when there which allows the HVB 10 to be connected directly to both ends of the cables. is direct access to both ends of the cable...

  • Page 21: Use Of An External Safety Device (Optional)

    Commissioning Use of an External Safety Device (Optional) With the aid of an external safety device, the current status of the system can be made Purpose clearly visible with coloured signal lamps and the generation of HV can be interrupted or locked with an EMERGENCY OFF switch and key switch (norm-compliant signalling and EMERGENCY OFF according to DIN EN 50191 / VDE 0104).

  • Page 22: Operation

    A corresponding message appears on the display. The HVB 10 is started by pressing the on/off push-button . After a few seconds, the system is ready for use. The main menu appears in the display.
  • Page 23 Operation The status bar at the bottom of the screen provides the following information: Status bar System Power supply status information … Mains operation (tap to view) … Battery operation Date / Time Remaining Firmware version battery capacity When setting a variable parameter, the following view appears: Adjusting the test or measuring parameters The value of the parameter can then be varied by turning the rotary encoder within the...

  • Page 24: Security Mechanisms

    Operation Security Mechanisms The safety circuit of the system permanently tests all security-related parameters and Introduction switching operations on the system as soon as an operating mode is selected that activates the HV output. Should the safety circuit detect a deviation from the monitored conditions while in high voltage mode, high voltage is immediately switched off and the HV output is discharged.

  • Page 25: System Settings

    Operation System Settings The setup menu which is divided into following categories can be accessed via the menu item from the main menu: Category Setting Description General Date / Time Correct date and time settings are required for the logging function. Sprache Selection of the interface language.

  • Page 26: Operating Modes

    5 to 10 minutes depending on the cable type. A test of the inner insulation of a PILC cable should last between 25 and 30 minutes. At a setting of 0 minutes, the HVB 10 runs in continuous operation mode and must be stopped manually.
  • Page 27 Operation Proceed as follows to perform insulation testing: Procedure Step Description In the main menu, call up the menu item Set voltage and test duration in accordance with the type of cable to be tested (see previous page). Start the test via the menu item Press the “HV ON”...

  • Page 28: Prelocating A Fault

    / or conductor material) or the same cross section and conductor material along the entire cable length. When set to Cable sections, the HVB 10 will request the parameters for the cable sections at the end of the prelocation measurement. In that...
  • Page 29 Operation Proceed as follows to perform fault prelocation: Procedure Step Description In the main menu, call up the menu item (standard accuracy mode) or (high accuracy mode) depending on the cable and fault characteristics. Set the voltage, the cable length and the type of cable (see previous page). Start the fault location via the menu item Press the “HV ON”...

  • Page 30: Pinpointing A Sheath Fault

    4.5.3 Pinpointing a Sheath Fault - During sheath fault pinpointing, the HVB 10 transmits direct current pulses at an Introduction adjustable rate into the shield affected by the earth fault.
  • Page 31 Start the pinpointing via the menu item Press the “HV ON” push-button Result: The HVB 10 with the set pulsing couples the DC pulse in the shield affected by the earth fault. Devices equipped with the "AF" option transmit a 8.44 kHz audio frequency signal in parallel.

  • Page 32: Burning

    Operation 4.5.4 Burning - This mode allows manual control of the output voltage during HV operation. Introduction Due to the high thermal stress which goes along with the burning process, the burn duration is limited to 5 minutes. In preparation of the burning process, the following parameters must be set: Measuring parameters Menu item Description Voltage...

  • Page 33: Concluding The Test

    The test object is to be earthed and short-circuited as well as checked that it has been completely discharged (e.g. using a properly sized discharge rod). Afterwards, the HVB 10 can be disconnected from the test object. Follow the five safety rules (see page 8).

  • Page 34: Processing Log Data

    Processing Log Data Processing Log Data When log data are exported after a test is complete, the files are written to the \Prot directory on the USB flash drive. The name of the file is comprised of the current date and a serial number. For larger test series, making notes about the sequence of the tests is recommended to make classify them easier later on.

  • Page 35: Updating The Firmware

    Result: The directory structure of the USB flash drive should then look as follows: Plug the USB flash drive into the USB port of the HVB 10 which has to be switched off. Briefly de-energize the HVB 10 by pulling the power cord. Afterwards, reconnect the power cord and power on the unit.

  • Page 36: Maintenance And Care

    Maintenance and Care Maintenance and Care It is not necessary to open the housing of the device to commission and operate the Maintenance system. Opening the housing causes the immediate termination of all warranty claims! The connections and connection leads of the system must be regularly tested to ensure that they are free of defects and intact, in accordance with the applicable national and company-specific arrangements.
  • Page 37 Tento symbol indikuje, že výrobek nesoucí takovéto označení nelze likvidovat společně s běžným domovním odpadem. Jelikož se jedná o produkt obchodovaný mezi podnikatelskými subjekty (B2B), nelze jej likvidovat ani ve veřejných sběrných dvorech. Pokud se potřebujete tohoto výrobku zbavit, obraťte se na organizaci specializující se na likvidaci starých elektrických spotřebičů...

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