28
Table 4-1. Recommended wire and terminal specification 1
72
4×25
DT16
40 kVA (/B)
Mains input current (A)
Recommended wire sectional area (mm
2
) R/Y/B/N
Wire terminal model
Mains input
61
4×16
DT16
Bypass input current (A)
Recommended wire sectional area (mm
2
) R/Y/B/N
Wire terminal model
Bypas
s inpu
t
61
4×16
DT16
Output current (A)
Recommended wire sectional area (mm
2
)
Wire terminal model
Output
Item
Model
R/Y/B/N
(when the load
is non-linear load, the
N wire should increase
the wire sectional area)
Table 4-1. Recommended wire and terminal specification 1
110
125
3×35
DT35
16
DT16
40 kVA (/B)
Battery input
Gr
ounding wi
re
Item
Model
Battery nominal discharge current (the current value of 384 V voltage
when standard equipped with 32 pieces 12 V storage battery) (A)
Battery max. discharge current (the current value when standard
equipped with 32 pieces 12 V storage battery stop discharge <each
piece voltage is 10.5 V>) (A)
Recommended wire sectional area (mm
2
) +/N/-
Wire terminal model
Recommended wire sectional area (mm
2
) PE
Wire terminal model
Note:
The wires prepared by our company have passed the GB or UL certification. The quality of wires is
excellent and meet production standards. The cross-sectional areas above are recommended for
5-metre long wires. Longer wires require larger cross-sectional areas.
4.2.5 Surge protection device
If the UPS is installed in a lightning-prone area, it’s better to install multiple surge protection devices between
the power grid and the UPS. The UPS can be equipped with the surge protection device of grade-C. If the UPS
is installed outdoors, it requires a higher surge protection level than those installed indoors.
4.2.6 Reverse feedback protection (optional)
It is suggested to add the contactor with 220 V AC coil at the AC power distribution side as the reverse feedback
protection device.