Areva MVAG, Руководство по обслуживанию, Страница: 16 / 38

Page 14
5.3 Failure of output contacts to change site.
Operating card/push rods not in position.
Check output terminals with reference to diagram.
Contamination of contacts.
Contacts should be cleaned with the burnishing tool, supplied in relay tool kits.
On no account should knives, files or abrasive materials be used.
Check mechanical settings as per Section 4.
5.4 Incorrect operating/resetting values.
Switch knob may have slipped. This can be reset as follows:
Turn the knob fully anti-clockwise. Remove the blue plastic cap in the switch knob.
Loosen screw and align arrow on the knob with the lowest setting. Tighten screw and
refit plastic value.
Note: The switch used is a 12 position switch and can, therefore, be rotated past
the highest setting. In the unmarked positions the relay is set to its highest
setting value.
Check switch setting (if appropriate).
Check values and correct connection of any external series resistors.
Check mechanical settings as per Section 4.
Section 6. SPARES
When ordering spares, quote the full relay model number and any component
reference numbers, or briefly describe the parts.
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.