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1.1.7
1.1.7.1
Ffficie,nc.y
l'lre
vc,rlues
of
ef
l'iciency
(liven
tion
under
rated condiIions
and
exci
ter
winillng
and
excitation
averaae values
of
efficiency
at
fa
c
tor.
Ifficiency at
part-
lo.]ds
sEffi&ffiffitrws
'jn
t.lre
selection tables
refer
i-0 oper(l-
include thg losses
in
Lhe
alternalor
equi
pnrent.
The
fol
l orvi
ng tabl es
qi
ve
part
loads
and
relatecl
to
the
Jrovrei'
Ifficiency
n
1/2
appr0x.
at
cons
tant
314
appr0x.
povrc
r
fac
tor
and
I
oad
as fol
I
ovrs
514
a
ppf0x.
4/4
approx.
B{l
.5
B6
86.
5
87
E7.5
8B
t18.
5
{19
89.
5
90
90.5
91
91.5
9'2
9?
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93
93.
5
94
94.
5
95
95.
s
96
88.
5
S6
36.
5
B7
67.
5
u8
BB,5
u9
ao
q
90
90.
5
91
9i.5
92
92
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93
93.
5
94
94.5
95
95.5
96
u5
85.5
u6
Bb.5
81
B1
.5
8iJ
rl8,5
39
irg,
5
90
90.5
91
91,5
9?
9Z
.5
93
93.
5
94
94.5
95
95.
5
84
84.5
ti5
{t6.5
B6
B6.5
8l
87.t)
IJIJ
88.5
B9
89.
5
90
90.
5
91
91.5
92
92
.5
93.5
93.3
94
.3
94.
u
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