Mitsubishi Electric C Series Handling And Maintenance page 10

(2) For earth leakage circuit breaker
1 Trip 1 1 1 1
Tripping of earth leakage circuit breaker includes two kinds; leak trip in which magnitude of leakage
is detected for automatic tripping (open circuit), and overcurrent trip in which magnitude of overload
current or short-circuit current is detected for automatic tripping.
For distinction of two kinds of tripping, the leak indication button comes out at leak trip only. The
indication button also comes out when the leak test button is pushed for checking leak current
operation.
Type
NV, MN
When the breaker cuts off automatically, turn ON the handle after eliminating the cause.
Otherwise, electrification and fire can take place.
If the cause isn't known, contact us at our service stations, branch offices, local offices, or ask
an electrician in your country.
2 2 2 Reset operation 2 2
When the leakage indication button comes out, remove the cause of failure, reset in the following
procedure, then close the circuit again.
Type
NV30-CS·50-CSA
NV63-CW~600-CW
NV32-SW~1200-SB
Handle indication
The handle
indicates
middle position
of ON and
OFF.
No white
line is seen.
CAUTION
Handle reset
Automatically reset when the handle is turned
to ON position.
Push down forcefully the
handle in OFF direction.
Automatically reest when the handle is reset.
Overcurrent trip or tripping by
trip button
Not come-out
Leakage indication
button (white)
Trip
Leakage indicator reset
Leakage indication button
Leakage trip; tripping by
leakage test button
Come-out
Reset the handle.
Leakage indication
button (white)
8