E-47
ENGLISH
22.2 Preparation before Inspection
CAUTION
Before inspecting the circuit breaker, open (turn
OFF) the upper circuit breaker and check that
the power is not supplied.
If the circuit breaker is ON, open (turn OFF) the
circuit breaker and perform the drawout operation.
CAUTION
If inspection and maintenance should be carried out without cutting of the power supply in an unavoidable cases, wear
rubber gloves and insulated boots laying rubber mat on the floor. Use insulated tools and instruments only. An access
to the live parts is necessary in this inspection and maintenance work, when workers’ full attention should be paid to the
insulation of human body from the live parts.
Any normal opening/closing of the circuit breaker will be done safely because the live parts are covered with insulated
mold case or the like.
• The personnel having expertise concerned shall perform any inspection and maintenance. Note that there are the risk of electrical shock.
• Any maintenance/inspections shall be performed after cutting off the master device and making sure that there is no current flowing.
Note that there are the risk of electrical shock.