MIL-HDBK-1130
only those primary and secondary circuits required should be left energized.
Reduce the number of energized transformers to a minimum by connecting
adjacent secondaries together. Transformers may also be replaced by smaller,
surplus transformers if they meet the distribution requirements. If
transformers and associated switchgear are inactivated in place and not
energized, additional measures should be taken against corrosion. Normally,
electrical components are fairly dry by virtue of being above ambient
operating temperatures. In order to prevent moisture condensation, these
electrical system components should be carefully sealed. Heating the building
will also aid in eliminating moisture buildup.
Utility Services. All contracts for utility services should be
2.5.3.2
carefully reviewed to determine the minimum requirements for the changed
status of the activity. Utility companies supplying services should be
advised of the changed status of the station and of the anticipated reduction
in demand, personnel, and use of equipment that might affect the rate of
service. Modification or termination of utility contracts should be scheduled
to coincide with a change of status of the activity. EFD 09B has the sole
authority to amend or cancel utility contracts.
2.5.4
Electric Distribution Systems Reactivation
Utility Services. Utility requirements for the reestablished
2.5.4.1
activity need to be determined. The utility company supplying services should
be advised of the changed status of the activity, and the utility contract
should be expanded or reestablished to provide the necessary level of service.
This will be the responsibility of the EFD Code 09B.
2.5.4.2
Distribution Systems. If, during the inactivation of the facility,
the number of energized transformers was reduced or transformers replaced by
smaller ones with the secondary circuits connected accordingly, the
distribution system must be restored or upgraded to meet the new utility
requirements. This means disconnecting the smaller transformers;
disconnecting the adjacent secondary transformers; and providing the number of
primary and secondary circuits needed for normal operations. The smaller
transformers should then be removed and stored or properly disposed of. After
transformers have been checked to see if they are operable, the following
steps should be taken:
a)
Cables should be meggered and measured for polarization levels
to detect moisture migration into species.
b) The system should be restored by replacing the primary fuses at
substations, closing the primary and sectionalizing switches,
and closing the cutout doors for the transformer primary
cutouts.
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