HADEX HD0370 Parallel Board Installation Guide
- June 3, 2024
- HADEX
Table of Contents
HD0370 Parallel Board
Installation Guide
Introduction
This inverter can be used in parallel with two different operation modes.
- Parallel operation in single phase with up to 9 units.
- Maximum 9 units work together to support three-phase equipment.
NOTE: If this unit is bundled with parallel cable, this inverter is default supported parallel operation. You may skip section 3. If not, please purchase parallel kit and install this unit by following instruction from professional technical personnel in local dealer.
Package Contents
In parallel kit, you will find the following items in the package:
Parallel board| Parallel communication cable| cables between Parallel card and control board,main board
Parallel board installation
This installation steps are only applied to 4K/5K models.
Step 1: Remove wire cover by unscrewing all screws.
Step 2: Remove communication board by unscrewing two screws as below
chart. Step 3: Remove two screws as below chart and remove 2-pin and
14-pin cables. Take aut the board under the communication board.
Step 4: Remove two screws as
below chart to take aut cover of parallel communication.
Step 5: Install new parallel
board with 2 screws tightly.
Step 6:
Re-connect 2-pin and 14-pin to original position.
Parallel board
| Parallel board CN1 | Main board CN16,17,18 |
|---|---|
| Parallel board CN4 | Control board CN5 |
Step 7: Put communication board back to the unit.
Step 8:
Put wire cover back to the unit. Now the inverter is providing parallel
operation function.
Mounting the Unit
When installing multiple units, please follow below chart.
NOTE: For
proper air circulation to dissipate heat, allow a clearance of approx. 20 cm
to the side and approx.
50 cm above and below the unit. Be sure to install each unit in the same
level.
Wiring Connection
The cable size of each inverter is shown as below:
Recommended battery cable and terminal size for each inverter:
| Model | Wire Size | Rin9 Terminal | Torqu e value |
|---|---|---|---|
| Cable mm2 | Dimensions | ||
| D(mm) | L(mm) | ||
| 3 2KVA | 1*4AWG | 22 | 6.4 |
| 2*8AWG | 14 | 6.4 | 29.2 |
| 5.SKVA | 1*4AWG | 22 | 6.4 |
| 2*8AWG | 14 | 6.4 | 29.2 |
WARNING : Be sure the length of all battery cables is the same. Otherwise, there will be voltage difference between inverter and battery to cause parallel inverters not working.
Recommended AC input and output cable size for each inverter:
| Model | AWG no. | Torque |
|---|---|---|
| 3.2KVA | 10 AWG | 1.4rvl.6Nm |
| 5.5KVA | 8 AWG | 1.4rvl.6Nm |
You need to connect the cables of each inverter together. Take the battery
cables for example: You need to use a connector or bus-bar as a joint to
connect the battery cables together, and then connect to the battery terminal.
The cable size used from joint to battery should be X times cable size in the
tables above. “X” indicates the number of inverters connected in parallel.
Regarding AC input and output, please also follow the same principie.
CAUTION!! Please install the breaker at the battery and AC input side. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over current of battery or AC input. The recommended mounted location of the breakers is shown in the figures in 5-1 and 5-2.
Recommended breaker specification of battery for each inverter:
| Model | 1 unit* |
|---|---|
| 3.2KVA | 80A/60VDC |
| 5.5KVA | 100A/60VDC |
*If you want to use only one breaker at the battery side for the whole system, the rating of the breaker should be X times current of 1 unit. “X” indicates the number of inverters connected in parallel.
Recommended breaker specification of AC input with single phase:
| Model | 2 units | 3 units | 4 units | 5 units | 6 units |
|---|---|---|---|---|---|
| 3.2KVA | 80A/230VAC | 120A/230VAC | 160A/230VAC | 200A/230VAC | 240A/230VAC |
| 5.5KVA | 100A/230VAC | 150A/230VAC | 200A/23VAC | 250A/23VAC | 300A/23VAC |
Notel: Also, you can use 40A breaker (50A for 5KVA) for only 1 unit, and
each inverter has a breaker at its AC input.
Note2: Regarding three phase system, you can use 4 poles breaker, the
rating is up to the current of the phase which has the maximum units. Or you
can follow the suggestion of note 1.
Recommended battery capacity
| Inverter parallel numbers | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|
| Battery Capacity | 400AH | 600AH | 800AH | lOOOAH | 1200AH |
WARNING! Be sure that all inverters will share the same battery bank. Otherwise, the inverters will transfer to fault mode.
5-1. Parallel Operation in Single phase
Two inverters in parallel:
Power Connection Communication Connection
Three inverters in parallel:
Power Connection
Communication Connection
Four inverters in parallel:
Power Connection
Communication Connection
Five inverters in parallel:
Power Connection
Communication Connection
Six inverters in parallel:
Power Connection
Communication Connection
5-2. Support 3-phase equipment
Two inverters in each phase:
Power Connection
Communication Connection
Four inverters in one phase and one inverter for the other two phases:
Power Connection
Note: Iťs up to customer’s demand to
pick 4 inverters on any phase.
Pl: Ll-phase, P2: L2-phase, P3: L3-phase.
Communication Connection
Three inverters in one phase, two inverters in second phase and one inverter
for the third phase:
Power Connection
Communication Connection
Three inverters in one phase and only one inverter for the remaining two
phases:
Power Connection
Communication Connection
Two inverters in two phases and only one inverter for the remaining phase:
Power Connection
Communication Connection
Two inverters in one phase and only one inverter for the remaining phases:
Power Connection
Communication Connection
One inverter in each phase:
Power Connection
Communication Connection
Photo of the connection
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Documents / Resources
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HADEX HD0370 Parallel
Board
[pdf] Installation Guide
HD0370, Parallel Board, HD0370 Parallel Board, Board
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