Selection Of Circuit Protector And Contactor; Selection Of Circuit Protector - Mitsubishi Electric MDS-D-SPJ3 Specification Manual

MITSUBISHI CNC
6 Specifications of Peripheral Devices

6-2 Selection of circuit protector and contactor

Always select the circuit protector and contactor properly, and install them to each drive unit to prevent disasters.

6-2-1 Selection of circuit protector

Calculate a circuit protector selection current from the rated output and the nominal input voltage of the drive unit
as in the expression below. And then select the minimum capacity circuit protector whose rated current meets the
circuit protector selection current.
Circuit protector selection current [A] =
(Circuit protector selection current for 200V input [A] / Nominal input voltage [V]) × 200 [V]
Unit type
MDS-D-SVJ3-
Rated output
Circuit protector selection
current for 200V input
Selection example of circuit protector
(Mitsubishi Electric Corp.)
Rated current of the selection example of
circuit protector
Unit type
MDS-D-SPJ3-
Rated output
Circuit protector selection current for
200V input
Selection example of circuit protector
(Mitsubishi Electric Corp.)
Rated current of the selection example of
circuit protector
Option part: A circuit protector is not prepared as an NC unit accessory, so purchase the part from your
dealer, etc.
1. It is dangerous to share a circuit protector for multiple drive units, so do not share it. Always install
the circuit protectors for each drive unit.
CAUTION
2. If the control power (L11, L21) must be protected, select according to the section "6-4-1 Circuit
protector ".
6 - 4
Selection of circuit protector for 200V input
03NA 04NA
0.3kW 0.4kW
2.5A 5A
NF30- NF30-
SW3P-5A SW3P-10A
5A 10A
075NA 22NA
0.75kW 2.2kW
6A 9A
NF30- NF30-
SW3P-15A SW3P-20A
15A 20A
07NA 10NA 20NA
0.75kW 1.0kW 2.0kW
7A 8A 10A
NF30- NF30- NF30-
SW3P-15A SW3P-15A SW3P-20A
15A 15A 20A
37NA 55NA 75NA
3.7kW 5.5kW 7.5kW
15A 23A 31A
NF30- NF50- NF100-
SW3P-30A SW3P-50A SW3P-60A
30A 50A 60A
35NA
3.5kW
15A
NF30-
SW3P-30A
30A
110NA
11kW
45A
NF100-
SW3P-
100A
100A