| Tweet |
Custom Search
|
|
|
||
 Preventive Maintenance Checks and Services
Table 2-1.
A - Annually
S - Semiannually
Q - Quarterly
D - Daily W - Weekly M - Monthly
Items To Be
Interval
Item
Procedures
Inspected/
No.
D
W
M
Q
S
A
Serviced
CONTROL CENTERS/SWITCHBOARDS - CONT
(b) Repeat this process at least three times
Ship
88
q
until it is reasonably certain that there has
Service/Emer-
been no significant load change.
gency
Switchboard
Measuring
Instruments -
CONT
Motor Control
89
q
NOTE
Centers
q Maintenance
procedures for all Motor Control
Centers are the same.
q Existing
wiring configuration of indicating
lamps or electrical interlocks on some
controllers may provide a low voltage
feedback circuit at auxiliary contacts when
equipment power source is deenergized.
Clean and Inspect Controllers.
(1) Deenergized circuit(s) to controller and tag "Out
of Service - Do Not Operate."
(2) Open/remove controller access cover(s).
|
||
|
||
