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23.
INSPECTION AND MAINTENANCE
0
h
u
r
r
i
n
g points and
Instruments
Item
Line
voltage V1
Input
current
I l
Input
power P1
Input
power
factor
Pf,
output
votlage VZ
output
current
1 2
output
power Pz
output
factor
P f z
power
Converter
O u t p u t
Across
R
and
S, S
voltmeter and
T, and T and
R.
Moving-iron
type
170 to 253V
50/60Hz
(323
to
506'4
Line current at R,
ammeter
S.
and T
Moving4ron
type
On
R'
s'
and T' and
pl = Wll
+
W,2
+
W13 (three wanmeter
type
across R
and S. S and T,
method)
wattmeter
and
T
a n d
R
single-phase
To be
calculated using the formula indicated below, from the line
voltage,
input Current
and input power.
raled
current.
Dlflerence behveen
~haser
should be 10% or less
On U, V, and W.
single-phase
and across
U
and
P? = We1
+
WZ
Electrodynamic
type
V , V a n d W
(two
wattmeter method (or three wattmeter
wattmeter
method))
To
be
calculated using the formula indicated below, from
the
line voltage, input current
and input power in the same manner as calculatlng input power factor.
Pfz=+xloo%
P
P X
12
Across
P(+)
and
N
Unit LED display lights
1.35
x
v1
Max. 380
VDC (7")
during reomeration
-
101
-
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