GEH-1768
The Type IAV54F relay is s imilar to the Type IAVS4E relay, except that it has a
longer operating time.
The time characteris tics are s hown in Figure 3.
The Type IAV54H relay is als o s imilar to the Type IAV54F relay, except that it
has a much longer operating time than either the Type IAV54E or the Type IAV54F
relays .
The time characteris tics are s hown in Figure 4.
The Type IAVS5C relay is s imilar to the Type IAV54E relay, except that it has
two circuit-clos ing contacts .
The Type IAV55F relay is s imilar to the Type IAV54F relay, except that it has
two circuit-clos ing contacts .
The Type IAV55H relay is s imilar to the Type IAV54H relay, except that it has
two circuit-clos ing contacts .
The Type IAV55J relay is s imilar to the Type IAV55H relay, except that it is
provided with two s eparate s eal-in units ; one for each s et of normally-clos ed
contacts .
RATINGS
The operating-circuit ratings available are 115, 230 or 460 volts at 60, 50, or
25 cycles .
The operating coil will s tand rated voltage continuous ly on any tap and
will s tand tap voltage continuous ly on the taps above rated voltage.
The current-clos ing rating of the contacts 1.s 30 amperes for voltages not
exceeding 250 volts .
The current-carrying ratings are affected by the s election of
the tap on the s eal-in coil, as indicated in the Table 1:
Function
Tripping Duty
Carry Continuous ly
TABLE 1
AC or DC
2
0. 2
30
3
3
0. 3
The 2 ampere tap has a DC resis tance of 0. 13 ohms and a 60 cycle impedance of
0. 53 ohms ; the 0. 2 ampere tap has a 7 ohm DC res is tance and 52 ohm 60 cycle
impedance.
The tap setting us ed on the s eal-in element is determined by the current
drawn by the trip coil.
The 0. 2 ampere tap is for us e with trip coils that operate on currents rang1ng
from 0. 2 up to 2. 0 amperes at the minimum control voltage.
If this tap is us ed with
trip coils requiring more than 2 amperes , there is a poss ibility that the 7 ohm
res is tance will reduce the current to s o low a value that the breaker will not be
tripped.
4
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