GEH-12668 Type
IAV
Undervoltage and Overvo/tage Relays
100
120
140
160
:ao
200
2 20
Per cent of minimum operating voltage
Function
Tripping Duty
Carry Continuoudy
4
Fig.
2.
Time-voltage <urves for Types
IAVSIA
and
IAV52A
relays
Amperes, A-c or D-e
I
2-amp Tap
(0.13
Ohm)
Target and
Seal-in Coil
30
4
0.2-arnp Tap
(7 Ohms)
Target and
Seal-in Coil
5
0.8
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 am
peres at the minimum control voltage. If this tap is
used with trip coils requiring more than two amperes,
there is a possibility that the seven ohms resistance
will reduce the current to so low a value that the
breaker will not be tripped.
The 2.0-ampere tap should be used with trip
(
"--·
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