IMO SD1 Series - Breaker and Electromagnetic Contactor

SD1 Series Inverters Optional Peripheral Accessories
-154-
Model
Recommended
cable size (mm
2
)
Size of connectable cable
(mm
2
)
Terminal
screw
Tightening
torque (Nm)
RST
PE
RST
P1, (+) PE
UVW
UVW
SD1-150A-43
70
35
35~70
35~70
16~35
M8
10
SD1-180A-43
95
50
70~120
70~120
50~70
M12
35
SD1-215A-43
120
70
70~120
70~120
50~70
M12
35
Note:
 Cables of the sizes recommended for the main circuit can be used in scenarios where the
ambient temperature is lower than 40°C, the wiring distance is shorter than 100 m, and the
current is the rated current.
 Terminals P1, (+), PB and (-) are used to connect to the DC reactor options and parts.
C.4 Breaker and Electromagnetic Contactor
You need to add a fuse to prevent overload.
You need to configure a manually manipulated molded case circuit breaker (MCCB) between
the AC power supply and inverter. The breaker must be locked in the open state to facilitate
installation and inspection. The capacity of the breaker needs to be 1.5 to 2 times the rated
current of the inverter.
It is recommended to use B type breakers for all the IMO inverters.

According to the working principle and structure of breakers, if the
manufacturer's regulation is not followed, hot ionized gases may escape
from the breaker enclosure when a short-circuit occurs. To ensure safe
use, exercise extra caution when installing and placing the breaker. Follow
the manufacturer's instructions.
To ensure safety, you can configure an electromagnetic contactor on the input side to control
the switch-on and switch-off of the main circuit power, so that the input power supply of the
inverter can be effectively cut off when a system fault occurs.
Model Fuse (A)
Breaker
(A)
Contactor rated
current (A)
SD1-2.5A-21
10
10
9
SD1-4.2A-21
16
16
12
SD1-7.5A-21
25
25
25
SD1-10A-21
50
40
32
SD1-2.5A-23
6
6
9
SD1-4.2A-23
10
10
9
SD1-7.5A-23
16
16
12
SD1-10A-23
25
25
18