Installation and Operating Instructions - Crompton Instruments

COPYRIGHT
The copyright in this document (including all information contained therein) is owned by
CROMPTON INSTRUMENTS and must be used solely for the owner’s specified purposes.
This document must not be copied or reproduced, nor divulged in whole or in part, without the
owner’s written consent.
WARNINGS
1 The System Protection Relay is not intended to be used as a sole means of
protection - good engineering practice dictates that any critical function be
protected by two independent and diverse devices.
2 In the interest of safety and functionality this product must be installed by
qualified properly trained personnel abiding by local regulations.
CAUTIONS
3 Voltages dangerous to human life are present at some of the terminal
connections of this unit. Ensure that all supplies are de-energised before
attempting any connection or disconnection. External installations must be
sufficient to protect human life and equipment under fault conditions.
1 These products do not have internal fuses, therefore external fuses must
be used for protection for safety under fault conditions.
2 The current inputs of these products are designed for connection into
systems via current transformers only.
3 Never open-circuit the secondary winding of a current transformer. Always
ensure that the power is disconnected before separating the current
connector from SPR.
4 Internal self-checking circuitry (watchdog) continuously monitors the
operational state of the SPR, and operates a dedicated relay contact. If the
Watchdog relay is in the ‘failed’ condition (not energised) all other relay
contacts are forced to the de-energised condition.
5 Operation outside specified limits may cause permanent damage or
temporary disruption. For the latter case, normal operation may be
restored by temporary disconnection of the auxiliary supply.
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