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I FV71AD and 71BD
H IGH-SE ISM IC TARGET AND SEAL- IN UN IT
Ratings for the target and seal-in unit are shown in Table I I I.
D C Resistance + 10% ( Ohms)
Min. Operating ( Amp. ) +0 -60%
Carry Continuously ( Amperes)
Carry 30 Amperes for ( Second s)
Carry 10 Amperes for ( Seconds)
60 Hz Impedance ( Ohms)
H IGH-SE ISM IC INSTANTANEOUS UN IT
The instantaneous unit is frequency-compensated over the range o f 50% to 150% o f
system frequency.
continuously adjustable by means o f a potentiometer located in the rear o f the
relay.
CONTA CTS
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 for the IFV relays at tap voltage are given in Table IV.
voltage are given in Table V.
GEK-49865
Continuous Rating
-------------------
TABLE I I I
There are two ranges available (120-200 and 180-300) that are
BURDENS
TABLE II
----
120
240
280
0.2
8. 0
0.2
0. 3
0.03
0.25
68.6
6
Tap
55
-
64
70
82
93
ro
-
1
128
140
164
186
210
240
280
Tap
2. 0
0.24
2.0
3
4
30
0. 73
Those at rated
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