Toshiba S2E21 - Manual (Page 55)

TOSHIBA
Item Test method Decision Test
circuit
(single
phase)
Slowly reduce the 75% of the rated Figure 16
ing current and measure current
point the current value at
which the relay trips.
Clperat- Apply the rated Less than 4 s. Figure 16
c u r r e n t
time
2) Quickly change
current in one phase
to 0 and measure the
time it takes for
the relay to trip.
Apply the rated
current
f a c t o r
I I x
IN
Figure 16
Change current in The calculated value must be
one phase and within of the setting
measure the current value.
at which the relay
trips.
Example: When the setting
value is 30%. the
calculated value
must be in the
range of 25 to 35%.
--
- -
1 Measured current value.
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