IMO HD2-3.7A-43 - Page 395

HD2 Series Inverter Optional Peripheral Accessories
-386-
D.5 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 inverter rated input current.
 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.
D.5.1 For a single inverter
Table D–4 AC 3PH 380V (-15%)–440V (+10%)
Inverter model
Breaker rated
current (A)
Fast-acting fuse
rated current (A)
Contactor rated
current (A)
HD2-3.7A-43
6
10
9
HD2-5A-43
10
10
9
HD2-9.5A-43
20
20
18
HD2-14A-43
25
35
25
HD2-18.5A-43
32
40
32
HD2-25A-43
50
50
38
HD2-32A-43
63
60
50
HD2-38A-43
63
70
65
HD2-45A-43
80
90
80
HD2-60A-43
100
125
80
HD2-75A-43
125
125
98
HD2-92A-43
140
150
115
HD2-115A-43
180
200
150
HD2-150A-43
225
250
185
HD2-180A-43
250
300
225
HD2-215A-43
315
350
265
Note: The accessory specifications described in the preceding table are ideal values. You can select
accessories based on the actual market conditions but try not to use those with lower values.
D.5.2 For parallel inverters
The following tables lists the fuse/breaker model selection for the inverters to be paralleled. The
current of the fuse/breaker for a parallel inverter system is twice the rated current of the parallel
inverter system.