GE IAC51V Instructions Manual page 13

The current-closing rating of the contacts is
30
amperes for voltages not exceeding
The current-carrying ratings are affected by the
selection of the tap on the target and seal-in coil
as indicated in the following table:
30
Carry amps for (sec)
10
Carry amps for (sec)
(amp)
Carry continuously
(
(amp)
Minimum operating
amp)
Minimum dropout
DC resistance ohms)
60
(oh:ns)
hertz impedance
50
(ohms)
hertz impedance
If the tripping current exceeds
auxiliary relay should be used, the connections being
such that the tripping current does not pass through
the contacts or the target and seal-in coils of the
protective relay.
Fig. J.
(K-6306891-l)
250
volts.
DUAL RATED
0.2/2.0 0.6/2.0
0.6 2.0
0.2 2.0
3.5
0.05 2.2
0.5
5 .0 30
20
0.45
2.3 1.2 2.6
0.3 7
0.2 2.0 0.6 2.0
0.05 0.5 0 .15 0.5
0.24 0.18
8.3 0.78
0.65 6.2
50 0.65
42 0.5 4 5.1 0.5 4
30 amperes, an
48
45
42
6
39
3
33
)0
v
0
L 27
T
A
21
24
G
111
(
15
12
9
6
0
)
0 6 8
MULTIPLES OF IIINIIIUII TAP SETTING
SATURATION CURVES AT VARIOUS FREQUENCIES
FOR TAP RANGES
LOWEST TAP USED IN All CASES
OF
3
of Type lAC Relays \vitil
Saturation Curv<!S
Time Overcurrent Relays
Burdens for the standard coils are given in the
following table.
five amperes based on burden of minimum tap.
Volt-ampere burdens for the lowest tap on any
of the three coils can be determined for any value
of current, up to
Coil
Freq.
Amperes
4-16
60
50
25
1.5-6.0
60
50
25
0. 5-2.0
60
50
2 5
5
2
"'
60
50
"'
so� 1. 5- 6 . o
SO-v
2�!
5oft, AIIPS.
1
10 l2 14 16 18 20
THE TYPE IAC51A RELAY
for Lowest Taps .,£ the
Inverse-time r:haractcristics.
Typ
e IAC GEH-1753
BURDENS
These are calculated burdens at
20 times tap setting, from Fig.
Volt- Imp.
Tap
Amps
Ohms
4.0
8.8 0.3 5
4.0 8.0 0.32
4.0 7.5 0.30
1.5 59.0
2.36
1.5
52.0 2.08
1.5 48.0
1.92
0.5 21.2
530.0
0.5 470.0
18.8
0.5
430.0 17.2
TAP
RANGE
0
-
. .
5 2
TAP
AIIPS.
RANGE
TAP
4-16
Un i t
Jnduction
3.
PF
0.29
0.31
0.36
0.26
0.28
0.34
0.26
0.28
0.34
5