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broken delta voltage will therefore be three times the normal delta phase-to-phase voltage with no
fault.
The operating-circuit ratings available are shown in Table I. The operating coil will stand rated
voltage continuously on any tap.
RELAY
IAV51D
IAV51K
IAV52C
IAV52D
IAV52K
The current-closing rating of the contacts is 30 amperes for voltage not exceeding 250 volts. The
current-carrying ratings are affected by the selection of the tap on the seal-in coil, as indicated in
Table II.
FUNCTION
Tripping Duty Carry
Continuously
The 2-ampere tap has a DC resistance of 0.13 ohms and a 60 cycle impedance of 0.53 ohms, while
the 0.2-ampere tap has a 7-ohm DC resistance and a 52-ohm 60 cycle impedance. The tap setting
used on the seal-in element is determined by the current drawn by the trip coil.
The 0.2-ampere tap is for use with trip coils that operate on currents ranging from 0.2 up to 2.0
amperes at the minimum control voltage. If this tap is used with trip coils requiring more than two
amperes, there is a possibility that the 7-ohm resistance will reduce the current to so low a value that
the breaker will not be tripped.
The 2-ampere tap should be used with trip coils that take 2 amperes or more at minimum control
voltage, provided the tripping current does not exceed 30 amperes at the maximum control voltage.
If the tripping current exceeds 30 amperes an auxiliary relay should be used, the connections being
GEK-45404
RATINGS
VOLTAGE RATINGS
60HZ
115
199
345
67
115
199
345
199
67
TABLE II
AMPERES
2-Amp Tap
30
3
5
50HZ
115
199
345
67
115
199
345
67
0.2-Amp Tap
0
0.3
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