I
8 . M A I N T E N A N C E AND I N S P E C T I O N
8-1. G e n e r a t o r
(1) Bear i ng
T h e g e n e r a t o r s , s u p p l y g r e a s e to the b e a r i n g s
e v e r y 250
h o u r s so that the g r e a s e q u a n t i t y
is a b o u t 1/3 of the .
b e a r i n g - c h a m b e r volum e.
(2) I n s u l a t i o n R e s i s t a n c e
M e a s u r e the i n s u l a t i o n r e s i s t a n c e w i t h a 5 0 0 V - m e g g e r at least
o n c e e v e r y m o n t h to c h e c k for not less than one m e g o h m .
* M e a s u r i n g m e t h o d and a l l o w a b l e limit
As i l l u s t r a t e d in the f o l l o w i n g
d r a w i n g ,
r e m o v e the l o a d - s i d e
w i r e from the o u t p u t t e r m i n a l
block, turn the b r e a k e r ”0 N ”
and
m e a s u r e the i n s u l a t i o n r e s i s t
a n c e b e t w e e n the o u t p u t t e r m i n a l
bolt and b o n n e t .
If the i n s u l a t i o n r e s i s t a n c e
thus m e a s u r e d is f o u n d to be 0.5 m e g o h m
or bel o w ,
r e p a i r
the t r o u b l e s p o t to p r e v e n t e l e c t r o c u t i o n and f i f e p o s s i b l y
c a u s e d o t h e r w i s e .
8-2. C o n t r o l Box
C h e c k the m e a s u r i n g i n s t r u m e n t s for n o r m a l o p e r a t i o n .
8-3. E n g i n e
P e r f o r m d a i l y and p e r i o d i c i n s p e c t i o n s a c c o r d i n g to the
a t t a c h e d ’
’
E n g i n e I n s t r u c t i o n M a n u a l ”.
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