Toshiba S2E21 - Page 54

TOSHIBA
6F9EOlll
r
Item
Test method Decision
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UC
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Operat-
ing
point
Operat-
ing
time
Operat-
ing
point
Operat-
ing
time
Apply rated current and
gradually lower the
current. Measure the
current value at which
the relay trips.
1) Apply the rated
current (IN).
2) Quickly reduce the
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.
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--
Setting value *lo%
Setting value *10X.‘
Setting value 3~15% Figure 15
50 ms or less
Test
circuit
(single
chase)
Figure 15
Figure 15
Figure 15
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