5. Peripheral Devices
5 - 4
5-2 Selection of no-fuse breaker and contactor
Always select the no-fuse breaker and contactor properly, and install them to each power supply unit to
prevent disasters.
5-2-1 Selection of no-fuse breaker
Select the no-fuse breaker 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 no-fuse breaker is shared by several drive units, the no-fuse breaker may
not activate when a short-circuit fault occurs in a small capacity drive unit. This
is dangerous, so never share the breaker by several drive units. Always install
the no-fuse breaker 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".
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