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5. Peripheral Devices
5 - 4
5-2 Selection of circuit protector and contactor
Always select the circuit protector and contactor properly, and install them to each power supply unit to
prevent disasters.
5-2-1 Selection of circuit protector
Select the circuit protector as in the expression below.
Unit type
MDS-R-
V1-20 V1-40 V1-60 V1-80
Recommended
breaker
(Mitsubishi Electric
Corp.: option part)
NF30-
CS3P-15A
NF30-
CS3P-20A
NF30-
CS3P-30A
NF50-
CW3P-40A
Rated current of the
recommended
breaker
15A 20A 30A 40A
Unit type
MDS-R-
V2-2020 V2-4020 V2-4040 V2-6040 V2-6060 V2-8040 V2-8060 V2-8080
Recommended
breaker
(Mitsubishi Electric
Corp.: option part)
NF30-
CS3P-20A
NF30-
CS3P-30A
NF30-
CS3P-30A
NF30-
CS3P-30A
NF50-
CW3P-40A
NF50-
CW3P-40A
NF50-
CW3P-40A
NF50-
CW3P-40A
Rated current of the
recommended
breaker
20A 30A 30A 30A 40A 40A 40A 40A
Option part: A breaker is not prepared as an NC unit accessory, so purchase the part from your dealer, etc.
CAUTION
1. If a circuit protector is shared by several drive units, the circuit protector may
not activate when a short-circuit fault occurs in a small capacity drive unit. This
is dangerous, so never share the circuit protector by several drive units.
Always install the circuit protector for each drive unit.
2. If the control power (CN22) must be protected, select according to the section
"5-4 Selection of control power supply".