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 TM 5-683/AVFAC MO-116/AFJMAN 32-1083
Table 2-2. Trouble-shooting procedures for switchgear equipment.
REMEDY
CAUSE
1.
M e t e r s Inaccurate
C l e a nr t e s t a n d c a l i b r a t e m e t e r .
Dirt or dust may be impeding
m o v e m e n t ; particles may be
adhering to the magnets
R e p a i r or replace damaged parts,
Meter may be damaged - have a
test and calibrate meter.
c r a c k e d jewel, rough bearing,
bent disk or shaft,
insufficient disk clearance or
d a m a g e d coils.
T i g h t e n test and calibrate meter.
Loose connections.
Remove the short.
C.T. circuit shorted or
shorting strap left
2.
Meters Failing to Register
Renew blown fuses. A s c e r t a i n r e a s o n
B l o w n potential transformer
and correct trouble.
fuse.
R e p a i r break, c o r r e c t f a u l t .
B r o k e n wires or fault in
connections.
R e m o v e wedge or block, test and
calibrate meter.
W e d g e or block accidentally
left at time of test or
inspection.
Remove the short.
C.T. circuit shorted or
shorting strap left.
Damaged Control, Instrument
3.
T r a n s f e r Switch or Test Blocks
D r e s s or clean burned contacts, or
B u r n e d or pitted contacts from
r e p l a c e with new contacts if
long use without attention or
necessary.
f r o m unusual conditions.
2-17
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