Samlexpower Evolution EVO-1212F, Руководство пользователя

Страница: 41 / 112

40 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 41
NOTES FOR TABLE 3.1 - SIZING OF BATTERY SIDE CABLES AND EXTERNAL BATTERY
SIDE FUSES
1) Column 2 indicates the Rated Continuous DC Input Current drawn from the battery in
Inverter Mode
2) Column 3 indicates NEC Ampacity based on which cable conductor sizes (Columns 4 to 7)
are determined. NEC Ampacity is not less than 125% of the Rated Continuous DC Input
Current (Column 2) - Refer to NEC-2014 (National Electrical Code) - Section 215.2(A)(1)(a)
for Feeder Circuits.
3) Columns 4 to 7 indicate cable conductor size that is based on the following 2 consider-
ations. Thicker conductor out of the following 2 considerations has been chosen:
a) As per guidelines in NEC-2014 (National Electrical Code) - Ampacity Table 310.15(B)
(16) for Raceway and Ampacity Table 310.15(B)(17) for Free Air. Conductor size is
based on (i) NEC Ampacity specified at Column 3, (ii) Copper conductor with tem-
perature rating of 90°C and (iii) Ambient temperature of 30°C / 86°F
b) Voltage drop across the length of cables has been limited to 2% of 12V / 24V. 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).
4) Column 8 indicates the size of external fuse in the battery circuit. It is mandatory to install
this fuse within 7” of the battery Positive terminal to protect the internal DC Input Section
of the unit and also to protect the battery cables against short circuit. Ampere rating of
the fuse is based on the following considerations:
a) The Ampere rating of the fuse is not less than NEC Ampacity of 125% of the Rated
Continuous DC Input Current (Column 3) - Refer to NEC-2014 (National Electrical
Code) - Section 215.3
b) Standard Ampere Rating of Fuse equal to the above NEC Ampacity of 125% of the Rated DC
Input Current has been used - Refer to NEC-2014 (National Electrical Code) - Section 240.6(A)
c) Where Standard Fuse Rating does not match the required Ampacity of 125% of the
Rated Continuous DC Input Current (Column 3), the next higher Standard Rating of the
fuse has been used - Refer to NEC-2014 (National Electrical Code) - Section 240.4(B)
d) Type of fuse: Fast-acting, Current Limiting, UL Class T (UL Standard 248-15) or equivalent
3.5.7 Using Proper DC Cable Termination & Tightening Torques
The battery end and the inverter end of the wires should have proper terminal lugs that will
ensure a firm and tight connection. Choose lugs to fit the wire size and the stud sizes on the
inverter and battery ends.
Tightening torques to be applied to the wiring terminals are given in Table below:
TIGHTENING TORQUES
Battery Input
Connectors
External Charger Input
Connectors
AC Input and Output
Connectors
70 kgf.cm
(5.0 lbf.ft)
35 kgf.cm
(2.5 lbf.ft)
7 to 12 kgf.cm
(0.5 to 0.9 lbf.ft)
3.5.8 Reducing RF Interference
To reduce the effect of radiated interference, shield the wires with sheathing / copper foil /
braiding. For details, refer to Limiting Electro-Magnetic Interference" at Section 1.3.4.
SECTION 3 | Installation