SamplexPower Evolution Series Owner's Manual page 51

SECTIOn 3 |
" Earth Ground through Ground rod / buried metallic water / gas pipe. Hence, the battery
Negative, the metal frame/chassis of the DC Distributional Panel and the metal frame/chassis
of the EVO will all be bonded to the Earth Ground. If there was a +12V / +24V ground fault
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in the EVO , very large DC fault current (150A to 400A depending on the Model of EVO
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being used) from battery+ would flow through the larger DC side grounding wires to the bat-
tery Negative and will blow the battery fuse.
DC Side grounding Arrangement for typical Mobile installation (Please refer to Fig. 3.14)
A DC Side Grounding Connector (5) is provided in the EVO
to the metal frame/chassis of the EVO
Main Earthing Terminal "ME" in the motorhome / caravan. The wire size should be minimum
10mm or of the same size as the battery cable, whichever is thicker. battery cable size should
2
have minimum Ampacity ≥ the Ampere rating of the battery fuse (150A to 400A) depending on
the model of EVO
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battery Negative Terminal through the path: DC Side Grounding Connector (5) " Main Earthing
Terminal "ME" " "Chassis
the metal frame / chassis of the EVO
was a +12V / +24V ground fault in the EVO
ing on the Model of the EVO
grounding wire to the battery Negative and will blow the battery fuse.
3.14.1 Switching of bonding of output neutral to Chassis ground
Automatic Output Neutral to Chassis Ground bond switching arrangement has been provided
in these units through "Output Neutral to Chassis Ground bond Switching relay" [K4 in
fig 4.1] to switch bonding of the Output Neutral Terminal of the Inverter Charger as follows:
When operating as an inverter, the current carrying conductor of the Inverter Section that is
—
connected to the Output Neutral Terminal of the Inverter Charger is bonded to the metal
chassis of the inverter by the "Output Neutral to Chassis Ground bond Switching relay"
[K4 in fig 4.1]. As the metal chassis of the inverter is in turn bonded to the "Chassis
of the motorhome / caravan / vehicle or to the boat Ground (DC Negative Grounding bus
bar and the Main AC Grounding bus bar are tied together in a boat and this is called the
"boat Ground"), this current carrying conductor of the Inverter Section (connected to the
Output Neutral Terminal) will become the Grounded Conductor (GC) or the Neutral of the
Inverter Section.
When in Charging Mode, the Neutral conductor of the Grid power/Generator will be
—
connected to the Output Neutral Terminal of the Inverter Charger. At the same time, the
"Output Neutral to Chassis Ground bond Switching relay" [K4 in fig 4.1] will unbond
(disconnect) the Output Neutral connector of the Inverter Charger from the chassis of the
Inverter Charger. This will ensure that the Grounded Conductor (GC) / Neutral of the Grid
power/Generator is bonded to the Earth Ground at one single point at the location of the
AC Power Distribution System of the Motorhome and Caravan Park / Marina.
Disabling neutral to ground bond: In some applications, the Output Neutral may be
—
required to remain isolated from the chassis/Ground at all times. for this, automatic Ouput
Neutral to Chassis Ground bond can be disabled by disconnecting the Male/female Quick
Disconnect located in the AC wiring compartment. [Please see (i) 13, fig 3.9 and (ii) "QD"
in fig 4.1]
Installation
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being used. The DC Side Grounding Connector (5) will get connected to the
" of the motorhome / caravan " battery Negative Terminal. Hence,
will be bonded to the battery Negative Terminal. If there
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being used) from battery+ would flow through the larger DC side
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. Connect this DC Side Grounding Connector (5) to the
, very large DC fault current (150A to 400A depend-
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. This connector is internally bonded
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SAMLEX AMErICA INC. | 51
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"