Installation - Samlex Power PST-150-12 Manuel Du Propriétaire

SECTION 8 |
8.4.5 Recommended Sizes of DC Cables and External Fuses for
Battery Connection
Sizes of cables and external fuses are given in Table 8.1. The distance of 3 ft. / 6 ft. / 10 ft.
is the distance between the battery and the inverter. The running length of routing of
the cable should be considered if the cable run is not straight but circuitous. The recom-
mended size of cables will limit the voltage drop to 2% of the nominal battery voltage
(0.24V for 12V battery and 0.48V for the 24V battery).
The length of the cable for calculating voltage drop has been taken as 2 times the
distance between the inverter and the battery assuming that 2 lengths of cables (one
Positive and one Negative) are used for the connection. DC resistance values are based
on uncoated, stranded copper conductors at a temperature of 75°C. This temperature is
typical of operating power circuits.
TABLE 8.1 DC INPUT CABLES AND FUSES
Model No. Maximum
DC input
current at
rated output
power
(1)
PST-150-12
PST-150-24
NOTES FOR TABLE 8.1
1. T he Ampere Carrying Capacity (Ampacity) of various sizes of cables (Columns 4 to 6) is based on ISO
10133 for single, insulated conductors rated at 105°C, and installation in free air at 30°C ambient
temperature.
2. C olumn (3) shows the minimum Ampacity of cable sizes as per the National Electrical Code (NEC).
This is = 1.25 times the maximum DC input current at the rated output power [Column 2] (Refer to
NEC-2014, Section 215.2(A)(1)(a) for Feeder Circuits).
3. C olumns (4) to (6) show cable sizes that are based on NEC Ampacity (Column 3) or 2% voltage drop
due to rated maximum current (Column 2) flowing through resistance of cable run (2x distance),
whichever is thicker.
4. C olumn (7) shows the fuse rating which is equal to or more than the maximum rated input current
(Column 2) but less than the Ampacity of the cable size (Column 4 to 6) as per ISO 10133 specifica-
tions at NOTE 1 above.
8.4.6 DC Input Connection
The DC input terminals for battery connection (6 & 7 in Fig. 6.1) have cylindrical hole (5 mm
dia.) with set screw (#10, 24 TPI).
8.4.7 Detachable DC Input Cable Sets Provided
Following DC Input Cable Sets have been provided for temporary connection to vehicle
battery for powering low power devices like lap-top, cell phone charger, etc.
• Cable set with Cigar Plug, 3ft - AWG#14 / 2mm
in a vehicle is normally fused for 10A to 12A. The Cigar Plug is also rated for 10A to
12A. Hence, the wiring provided with this cable set is AWG #14 / 2mm
34 | SAMLEX AMERICA INC.

Installation

Minimum
Ampacity
(See Note 2)
(2) (3)
20A 25A
10A 12.5A
Size of Cable
based on distance between
battery and Inverter
(See Notes 1, 2 and 3)
3 ft. 6 ft.
(4) (5)
AWG AWG
#12 #10
AWG AWG
#14 #14
. Please note that 12V power outlet
2
Current rating
of external fuse
(See Note 4)
10 ft.
(6) (7)
AWG
20A
#6
AWG
10A
#12
suitable for
2