GEK-49865
TABLE II
Continuous Rating
Tap
----
55
-
I FV71AD and 71BD
H IGH-SE ISM IC TARGET AND SEAL- IN UN IT
120
64
70
82
93
-------------------
-
1
ro
128
140
240
164
280
186
210
240
280
Ratings for the target and seal-in unit are shown in Table I I I.
TABLE I I I
Tap
0.2
2. 0
D C Resistance + 10% ( Ohms)
8. 0
0.24
Min. Operating (Amp. ) +0 -60%
0.2
2.0
Carry Continuously (Amperes)
0.3
3
Carry 30 Amperes for (Second s)
0.03
4
Carry 10 Amperes for (Seconds)
0.25
30
60 Hz Impedance ( Ohms)
68.6
0. 73
H IGH-SE ISM IC INSTANTANEOUS UNIT
The instantaneous unit is frequency-compensated over the range o f 50% to 150% o f
system frequency.
There are two ranges available (120-200 and 180-300) that are
continuously adjustable by means o f a potentiometer located in the rear o f the
relay.
CONTACTS
The current-closing rating o f the contacts is 30 amperes for voltages not exceeding
250 volts.
The current-carrying rating is limited by the ratings o f the seal-in
unit.
BURDENS
Burdens for the IFV relays at tap voltage are given in Table IV.
Those at rated
voltage are given in Table V.
6
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