Toshiba S2E21 - Manual (Page 54)

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