Technical data

1MRS751108-MUM
REX 521
59
Protection Relay
Technical Reference Manual, General
6. Service
When the protection relay is used under the conditions specified in section 5.2.1.
Technical data, it is practically maintenance-free. The relay electronics include no
parts or components subject to abnormal physical or electrical wear under normal
operating conditions.
If the relay fails in operation or if the operating values considerably differ from those
mentioned in the relay specifications, the relay should be overhauled. Contact the
manufacturer or nearest representative of the manufacturer for further information
about checking, overhaul, and recalibration of the relay..
To achieve the best possible operation accuracy, all parts of the
protection relay have been calibrated together. In the event of
malfunction, please consult your relay supplier.
If the protection relay is sent to the manufacturer, it has to be
carefully packed to prevent further damage to the device.