Alstom MiCOM P846, Technical Manual

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P846/EN IN/D Installation
(IN) 15-4 MiCOM P846
IN
3. STORAGE
If relays are not to be installed immediately on receipt, they should be stored in a place free
from dust and moisture in their original cartons. Where de-humidifier bags have been
included in the packing they should be retained.
To prevent battery drain during transportation and storage a battery isolation strip is fitted
during manufacture. With the lower access cover open, presence of the battery isolation
strip can be checked by a red tab protruding from the positive polarity side.
Care should be taken on subsequent unpacking that any dust, which has collected on the
carton, does not fall inside. In locations of high humidity the carton and packing may
become impregnated with moisture and the de-humidifier crystals will lose their efficiency.
Prior to installation, relays should be stored at a temperature of between –25˚C to +70˚C
(-13˚F to +158˚F).
4. UNPACKING
Care must be taken when unpacking and installing the relays so that none of the parts are
damaged and additional components are not accidentally left in the packing or lost. Ensure
that any User’s CDROM or technical documentation is NOT discarded – this should
accompany the relay to its destination substation.
Note: With the lower access cover open, the red tab of the battery isolation
strip will be seen protruding from the positive (+) side of the battery
compartment. Do not remove this strip because it prevents battery
drain during transportation and storage and will be removed as part of
the commissioning tests.
Relays must only be handled by skilled persons.
The site should be well lit to facilitate inspection, clean, dry and reasonably free from dust
and excessive vibration.