Areva MVAG Service Manual
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Areva MVAG Service Manual

Areva MVAG Service Manual

Instantaneous under and over voltage relays
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Type MVAG
Instantaneous Under and
Over Voltage Relays
Service Manual
R8049D

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Summary of Contents for Areva MVAG

  • Page 1 Type MVAG Instantaneous Under and Over Voltage Relays Service Manual R8049D...
  • Page 3 The electronic circuits of AREVA T&D products are immune to the relevant levels of electrostatic discharge when housed in their cases. Do not expose them to the risk of damage by withdrawing modules unnecessarily.

  • Page 4: Table Of Contents

    Types: Single Triple Element Element Undervoltage MVAG 11 MVAG 31 MVAG 12 MVAG 32 MVAG 13 MVAG 33 MVAG 14 MVAG 34 Overvoltage MVAG 15 MVAG 35 MVAG 16 MVAG 36 MVAG 17 MVAG 37 MVAG 18 MVAG 38 CONTENTS...
  • Page 5 CONTENT SAFETY SECTION Health and safety Explanation of symbols and labels INSTALLING, COMMISSIONING AND SERVICING EQUIPMENT OPERATING CONDITIONS Current transformer circuits External resistors Battery replacement Insulation and dielectric strength testing Insertion of modules and pcb cards Fibre optic communication OLDER PRODUCTS DECOMMISSIONING AND DISPOSAL TECHNICAL SPECIFICATIONS...

  • Page 7: Safety Section

    SAFETY SECTION This Safety Section should be read before commencing any work on the equipment. Health and safety The information in the Safety Section of the product documentation is intended to ensure that products are properly installed and handled in order to maintain them in a safe condition.

  • Page 8: Equipment Operating Conditions

    Voltage and current connections should be made using insulated crimp terminations to ensure that terminal block insulation requirements are maintained for safety. To ensure that wires are correctly terminated, the correct crimp terminal and tool for the wire size should be used. Before energising the equipment it must be earthed using the protective earth terminal, or the appropriate termination of the supply plug in the case of plug connected equipment.

  • Page 9: Fibre Optic Communication

    Fibre optic communication Where fibre optic communication devices are fitted, these should not be viewed directly. Optical power meters should be used to determine the operation or signal level of the device. OLDER PRODUCTS Electrical adjustments Equipments which require direct physical adjustments to their operating mechanism to change current or voltage settings, should have the electrical power removed before making the change, to avoid any risk of electrical shock.

  • Page 10: Technical Specifications

    TECHNICAL SPECIFICATIONS Protective fuse rating The recommended maximum rating of the external protective fuse for this equipment is 16A, Red Spot type or equivalent, unless otherwise stated in the technical data section of the product documentation. Insulation class: IEC 601010-1 : 1990/A2 : 2001 This equipment requires a Class I protective (safety) earth...

  • Page 11: Installation

    If damage due to rough handling is evident, a claim should be made to the transport company concerned immediately, and AREVA T&D promptly notified. Relays which are supplied unmounted and not intended for immediate installation should be returned to their protective polythene bags.

  • Page 12: Commissioning

    Publication R6001 is a leaflet on the modular integrated drawout system Publication R6014 is a list recommended suppliers for the pre-insulated connectors. Section 2. COMMISSIONING General Before leaving the factory all relays are accurately adjusted, tested and carefully packed. Hence there should be no need for any re-adjustment on commissioning. Moving parts are held in position during transit by rubber bands and packing.

  • Page 13: Insulation

    2.6.1 Relay types MVAG 11/31, 12/32, 15/35 and 16/36 have fixed settings. MVAG 13/33, 14/34, 17/37 and 18/38 have adjustable settings. Operate levels for all types should be within ±5% of their set values. Reset levels vary with type:...

  • Page 14: Maintenance

    0.003"/0.008" Nominal armature gap open 0.050"/0.060" for all types. Contact setting MVAA relays used as follower relays on the following MVAG types: MVAG 12/32, 14/34, 16/36, 18/38. Normal/heavy duty make and break contacts. With the armature closed onto a 0.011" feeler gauge the make contacts should be closed, but should be open using 0.013"...

  • Page 15: Mechanical Flag Settings

    Connections to pcb - when fitted. On relays with adjustable settings - chek setting value. Auxiliary supply (V ) not applied to terminals 13 and 14, MVAG 12/32, 14/34, 16/36 and 18/38. Check series resistors and rotary switches (where appropriate).

  • Page 16: Failure Of Output Contacts To Change Site

    Repairs Should the need arise for the equipment to be returned to AREVA T&Dfor repair, then the form at the back of this manual should be completed and sent with the equipment together with a copy of any commissioning test results.
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  • Page 33: Commissioning Test Record

    Section 7. COMMISSIONING TEST RECORD TYPE MVAG INSTANTANEOUS UNDER AND OVERVOLTAGE RELAY Site Circuit Serial No. Rating Diagram No. Model No. 3. Case earthing 4. Remove packing pieces Contact follow through Check flag(s) 6. DC supply polarity 4. Relay voltage V...
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  • Page 35: Repair Form

    REPAIR FORM Please complete this form and return it to AREVA T&D with the equipment to be repaired. This form may also be used in the case of application queries. AREVA T&D St. Leonards Works Stafford ST17 4LX England For :...
  • Page 36 6. What did happen? 7. When did the fault occur? Instant Yes / No Intermittent Yes / No Time delayed Yes / No (Delete as appropriate) ___________________ By how long? 8. What indications if any did the relay show? 9. Was there any visual damage? 10.
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  • Page 38 AREVA T&D's Automation & Information Systems Business www.areva-td.com T&D Worldwide Contact Centre online 24 hours a day: +44 (0) 1785 25 00 70 http://www.areva-td.com/contactcentre/...

This manual is also suitable for:

Mvag 11Mvag 31Mvag 12Mvag 32Mvag 13Mvag 33 ... Show all

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