Samlexpower SAM-1000-12 Owner's Manual - Section 4 |
12 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 13
requirement of fuse in Battery connection
A battery is a very large source of current. If there is a short circuit along the length of
the cables that connect the battery to the inverter, thousands of Amperes of current can
flowfromthebatterytothepointofshortingandthatsectionofthecablewilloverheat,
theinsulationwillmeltandislikelytocausefire.Topreventoccurrenceofhazardous
conditionsundershortcircuit,fusewithAmpererating≥themaximumcontinuouscur-
rent drawn by the inverter but ≤ the Ampacity of the connecting cable should be used
in the battery connection. The fuse should be fast acting Class-T or Marine rated battery
fuse Type Mrbf. rating of fuse is shown in Table 4.2 below. The fuse should be installed
as close to the battery Positive terminal as possible, preferably within 7”. Please note that
this fuse is required to protect the cable run from the battery to the inverter against short
circuit. The inverter has its own internal DC side fuse(s) for internal DC side protection.
making Dc Side connections
recommended cable and fuse sizes for connecting battery are given in Table 4.2. The
maximumcurrentforcablesizing/fuseratinghasbeenconsideredat1.25timesrated
continuous current draw at the rated output power.
table 4.2 recommended cable and fuse Sizes for Battery connection
model no.
rated
Dc input
current
cable Size
1
(ampacity)
max
fuse
Size
2
Distance between
inverter,
Battery and % Voltage
Drop
3
Samlex
fuse
(optional)
Samlex
cable +
fuse Kit
(optional)
3 ft.
6 ft.
10 ft.
SAM-1000-12
100A
AWG#4
(160A)
100 to
150A
1.2%
2.4%
4.0%
DC-FA-100
DC-1000-KIT
SAM-1500-12
150A
AWG#2
(215A)
200A
1.2%
2.3%
3.8%
DC-FA-200
DC-2000-KIT
SAM-2000-12
200A
AWG#2/0
(329A)
300A
0.8%
1.5%
2.5%
DC-FA-300
DC-2500-KIT
SAM-3000-12
300A
AWG#4/0
(446A)
400A
0.7%
1.4%
2.4%
DC-FA-400
DC-3500-KIT
noteS:
1. cable Size
• AsperNEC,sizeisbasedonAmpacity≥1.25timestheratedDCInputCurrent
• Conductor/Insulationrating:105°C
2. fuse Size
• Type:Class-TorMarineRatedBatteryFuse(MRBF)
• TheratingofthefuseshouldnotexceedtheAmpacityoftheCable
3. Distance between inverter and Battery and % Voltage Drop
• Voltagedropiscalculatedbasedonlengthofcable=2xDistancetoconsidertotallengthofPositive
and Negative cables
• %dropiscalculatedwithrespecttoratedbatteryvoltageof12.5V