SamplexPower Evolution Series Owner's Manual page 61

SECTIOn 4 |
Switching of bonding of output neutral to Chassis ground
o
40A rated SPDT relay K4 is used to switch the bonding of the Output Neutral Connector
(OUTPUT NEUTrAL) to the chassis of the unit
o
When Grid / Generator Power is available, relay K4 will be energized and contact 4
switches over to contact 5. Neutral input from the Grid (GrID NEUTrAL) or from the
Generator (GEN NEUTrAL) is fed to the Neutral input of the bi-directional Transformer
for battery charging and at the same time, it is passed through to the Output Neutral
(OUTPUT NEUTrAL) for powering the AC loads. Please note that in this condition, the
Output Neutral (OUTPUT NEUTrAL) is isolated from the chassis of the unit
o
When Grid / Generator power fails, relay K4 will be de-energized and contact 4 switches
back to contact 3. Neutral output from the Inverter Section is fed the Neutral of the
bi-directional Transformer and onwards to the output Neutral (OUTPUT NEUTrAL) for
powering the AC loads. At the same time, the output Neutral (OUTPUT NEUTrAL) gets
bonded to the metal chassis of the unit through the mated contacts of the Insulated
Quick Disconnect "QD" located in the AC Wiring Compartment (13, fig 3.9)
NEUTRAL
INVERTING
CHARGING
BI-DIRECTIONAL
TRANSFORMER
LINE
K2 Transfer relay (40A) for Grid, Line
K3 Transfer relay (40A) for Generator, Line
K4 relay (40A) for Neutral to Ground bond Switching
4, 3 Normally Closed Contacts
4, 5 Normally Open Contacts
QD Quick Disconnect (13, fig 3.9) for disconnecting Output Neutral to Chassis Ground bond in
Inverting Mode (Default - connected)
NOTE: relays are de-energized in Inverting Mode and are energized in Charging Mode
Fig 4.1 operation of transfer relay and neutral to ground bond Switching
general Description & Principles of Operations
K4
3
4
5
K2
3
4
5
K3
3
4 5
QD
METAL CHASSIS
GROUND OF THE EVO
GEN OUTPUT GRID GEN
LINE LINE LINE GND
OUTPUT GRID GEN OUTPUT
GND GND NEUTRAL NEUTRAL
SAMLEX AMErICA INC. | 61
GRID
NEUTRAL