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TOSHIBA
r
Item
Operat-
ing
point
U C
Operat-
ing
time
Operat-
ing
Operat-
ing
time
Test method
Apply rated current and
gradually lower the
current. Measure the
current value at which
the relay trips.
current (IN).
current to 20% of
the rated current
and measure the time
it akes for the
relay tc trip.
Gradually reduce the
current and measure the
current value at which
the relay trips.
Quickly apply current
two times the setting
value (I>>) and measure
the time it takes for
the relay to trip.
-
-
Decision
Setting value *lo%
Setting value *10X.'
Setting value 3~15%
50 ms or less
Test
circuit
(single
Figure 15
Figure 15
Figure 15
Figure 15
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