T O S H I B A
When undercurrent or disconnection is detected
At the
time the
circuit switch is turned
the
starting current and rated current flows, and the relay is
picked U
P
.
If current
below the undercurrent set point,
the undercurrent State is detected and the relay
out.
(Refer to Fig. 5)
Caution:
If input signal to this current relay is zero (When
it is not possible to judge if it is undercurrent or in a
disconnected state.
In this case, it is recommended to
have a circuit connecting a
auxiliary con-
tact of the
circuit switch in series with the
or
c i r c u i t .
t h i s w i l l D r e v e n t t h e r e l a y f r o r
a
fault condition during a
shutdown.
