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STANDARD INSTANTANEOUS UNIT
The standard instantaneous unit is designed to use one of several coil s.
l ists the pickup range, continuous current ratings and short time rating of each of
these coil s.
The current-closing rating of the contacts is
vol ts.
250
P ICKUP
RANGE
-
0.5
1
2
4
10
20
40
- 160
For forms 51
and
up,
l isted in Table IVb:
STAN DARD INSTANTANEOUS UNIT CO IL RAT INGS - FORMS
R ANGE
-
0 . 5
4.0
2.0 -
16.0
10.0 -
80.0
20.0 - 160.0
**Higher currents
in accordance with the formul a:
GEK-86105
TABLE IVa
STANDARD INSTANTANEOUS UNIT CO IL RATINGS
CONT INUOUS
CURRENT
2
0. 75
1.5
4
3. 0
8
6.0
16
40
15.0
30.0
80
60.0
the s tandard
instantaneous
TABLE IVb
SER IES O R
PARALLEL
Serie s
0.5 -
2.0
Para 11 e 1
4.00
1.0-
Serie s
2.0 -
8.0
16.0
Parallel
4.0 -
40.0
10.0 -
Series
P
20.0 -
80.0
ar
a
Series
20.0 -
80.0
Paral le l
40.0 - 160.0
may be appl ied for
(I)
=I
I
amperes for vol tages not exceed ing
30
SHORT T IME
ONE SECOND
(
RATING
unit has the foll owing ratings,
CONTINUOUS
0.75
1.5
3. 0
6.0
15.0
l e
l
l
25.0
25.0
25.0
shorter l engths
K
T
5
Tabl e IVa
)
12
25
51
127
205
6
32
326
AND U P
51
RAT INGS
ONE
SECOND**
5
2
. 0
50.0
130.0
260.0
400.0
600.0
600.0
600.0
of time
(T)
K
constant
=
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