Samlexpower PST-3000-12, Owner'S Manual

Page: 37 / 76

36 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 37
(i) NEC Ampacity specified at Column 3,
(ii) Copper conductor with temperature rating of 105˚C/221˚F and
(iii) Ambient temperature of 30°C / 86°F b)
b) Voltage drop across the length of cables limited to 2% of 12V / 24V.
i) Voltage drop has been calculated by multiplying the Rated DC Input Current
(Column 2) and the resistance of the total length of Copper conductor (the
total length of conductor has been taken as 2 times the running distance
between the unit and the battery to cover 2 lengths of Positive and Negative
cable conductors).
ii) Resistance of the cable is based on Table 8.1.
5) Samlex America, Inc. makes 4 Models of generic / universal Inverter Installation Kits to cov-
er installation requirements of a wide power range from 600W to 3500W for 12V invert-
ers and from 1200W to 7000W for 24V inverters. Please note that the Inverter Installation
Kit that has been recommended in Column (8) may include thicker wire size / correspond-
ingly bigger fuse size than those recommended in Table 8.2. This is acceptable.
Fuse in the battery circuit is primarily required for protection against short circuit in
the battery cable run. The size of this fuse has to be equal to or larger than the maxi-
mum DC input current of the inverter at Column (2). Further, the Amp rating of the
fuse used for protecting a battery cable against short circuit has to be lower than the
Ampacity of the cable so that the fuse blows before the cable insulation is damaged
due to overheating as a result of fault current higher than the Ampacity of the cable.
The Amp ratings of fuses provided with the Inverter Installation Kits are lower than
the wire size provided with the Kit.
The Kits come with 10ft length of cables to cover battery to inverter distance of up to
10 ft. If the actual cable routing distance from the battery to the inverter is less than
10ft, please cut-off the extra length of cables. This will result in reduction in the over-
all resistance of the cable / reduction in voltage drop and consequently, will improve
the efficiency of the inverter system
8.4.6 DC Input Connection
The DC input terminals for battery connection (14 & 16 in Fig. 6.1c) have nut and bolt con-
nection - bolt size is 5/16" (18 Threads per Inch). Use ring tongue type of terminals on the
wire ends to fit 5/16" bolt size.
8.4.7 Reducing RF Interference
Please comply with recommendations given in Section 3 - "Limiting Electromagnetic
Interference".
SECTION 8 | Installation