Table of Contents
Advertisement
23.
INSPECTION AND
MAINTENANCE
7;;
ir
r
Con(.ntS
JudgcMnt
Mer diSonneCtmp
1 1 1
wires at
me
Inverter terminals.
measure
resistance
across temlnals R,
S,
5
and, P,
N,
and
U. V,
W
and
P,
N
rrith a muitimeter in
the
x
1 n nnge.
(1) (2)
Visual
(3) Measure wtth
iwpBCtlon
a capacitance
measuring
instrument
Inverter
M u l e
Conver.
ter
Resicltance
moss
me
lerminais
(1)
Leak
of
fluld
(2) Protruwn
of
the salely
vabe. or
bulplng.
(3) Measurinp
me
capacitance
(1)
Chattering
Faise during
(2) SmOOmnes
operation
on contacl
(1) Crack
on
resetor
insulator
(2) Disconnecfior
W i t y
neter
1)
(2)
Must be
free of
a h m a l l -
ties.
3) High than
85%
Of
Me
rated
cawdly
1)
Must be free
of
2) Must be tree
of
Ibnormalities.
abnormalitles
lain
ircuit
(1 )
Listening
(2)
Vkuai
inspection
inspection
Relay
-
tor
ReSIS-
1) Must be free
of
abnormalltles.
2)
Must be wilhln
f10%
Of
me
indiuted
resistance.
(1) Visual lnspectlon
Cement
wound reststor
resistoIs, wlre
(2)
Olsconnect the
wire at one side
and measure
a multimeter
reslslance with
(1)
Measure
voltage across
the inverter
output
terminals U,
(2) Short the
v. w.
inverter
circuit w p u t s
protection
rester.
jigital
nuninmter
Digital
nuillmeter,
rectifier
dolbmter
( 1 )
Check the
balance
of
output voilape
interphase
the Inverter
b y opentlnp
(2) Conduct the
Independently.
sequence
protection
operation test
to check the
protection and
display circuits
1)
Imbalance
should be
uimin 4V
(for 2WV), BV
2)
me
dann
(
for 400V).
should
be
OUtpvt.
h t r d
ircuit
' r o t e
ircuit
on
-
97
-
Advertisement
Table of Contents
