Chapter 2 Installation Preparation 17
NetSure 801 AG1 Power Supply System User Manual
for the specifications of the tools. The tools must be well insulated and antistatic handled before they are
used.
2. Materials for electrical connection include AC cables, DC load cables, battery cables, earth cables, and earth
connection cables. The cables accessories are given in Table 2-4. Other cables should be prepared by users in
accordance with relevant specifications in the electrical industry.
Table 2-4 Accessory cables used in cable connection
BOM
Description
Length
04111819
W24GASL05 cable suite (CAN communication cable)
4.2m
04115520
W74C5FSL1 cable suite (temperature sensor cable)
10m
AC cables: This system uses 3-phase AC source. Copper core cables are recommended for the AC cables, whose
sectional area should suit the load. When the wiring distance is less than 30 meters, take 2.5A/mm
2
of economical
current density to calculate the sectional area of the AC cables.
The sectional area of the DC load cables and battery cables should be computed with the following formula:
A=ΣI × L / K
△
U
In this formula: A is the sectional area of the lead (mm
2
), ΣI is the total current (A) passing through the lead, L is the
length (m) of the lead loop,
△
U is the permitted voltage drop in the lead, while K is the conductivity factor. K
copper
=57.
For the sake of distribution safety, the voltage drop on the cables connecting battery and load cannot exceed 3.2V.
The sectional area of the earth cables (including DC earth cable) shall exceed 95mm
2
.
Note
Generally, in design the total current passing through the lead is calculated based on full load configuration.
Select the battery cable CSA according to Table 2-5. Select the load cable CSA according to Table 2-6.
Table 2-5 Battery cable CSA selection
Battery fuse rated current Max. battery current Min. cable CSA
Terminal specs
Max. cable length (allowable
voltage drop: 0.5V)
1250A
1250A
2 × 240mm
2
M12 or M16 OT terminal
10m
1000A
1000A
2 × 240mm
2
M12 or M16 OT terminal
13m
800A
800A
2 × 185mm
2
M12 or M16 OT terminal
13m
Note:
1. The specs are applicable at ambient temperature of 25°C. If the temperature is higher or lower than this, the CSA of the cable
should be increased.
2. The battery cable should reach at least +90°C heat durability. It is recommended to use double-insulated copper-core flame
retardant cable as battery cable
Table 2-6 Load cable selection
Load route rated
current
Max. output
current
Min. cable
CSA
Max. cable length (volt drop:
0.5V, with min. CSA)
Max. cable CSA
Max. cable length (volt drop:
0.5V, with max. CSA)
630A
630A
240mm
2
10m
300mm
2
13m
500A
500A
240mm
2
13m
300mm
2
17m
400A
400A
185mm
2
13m
300mm
2
21m
315A
315A
120mm
2
11m
240mm
2
22m
250A
250A
95mm
2
10m
185mm
2
21m
160A
160A
70mm
2
12m
95mm
2
16m
100A
100A
35mm
2
10m
50mm
2
14m
50A
50A
25mm
2
14m
35mm
2
20m
32A
32A
16mm
2
14m
25mm
2
22m
25A
25A
10mm
2
11m
16mm
2
17m
16A
16A
6mm
2
11m
10mm
2
17m
10A
10A
4mm
2
12m
10mm
2
27m
6A
6A
4mm
2
19m
10mm
2
45m
Note:
The specs are applicable at ambient temperature of 25°C. If the temperature is higher or lower than this, the CSA of the cable
should be increased
