Samlexpower Evolution EVO-2212 Owner's Manual page 65

SECTIOn 4 |
4.5.2 operation of transfer relay and output neutral to chassis ground
bond Switching relay – evo-2212 and evo-2224
refer to Schematic at fig 4.1(a)
the bi-directional transformer is used as follows:
feeds AC output from the Inverter Section when Grid / Generator power is not available.
o
feeds Grid / Generator power to the battery Charger Section when Grid / Generator are
o
available.
Switching of hot output (outPut line)
40A rated SPDT relays K2 and K3 are used to switch the hot Output Connector
o
(outPut line) to either the Inverter Section or to Grid / Generator
When Grid / Generator Power is available, relays K2 or K3 will be energized and contact
o
4 switches over to contact 5 (Grid has PrIOrITy over Generator if both are present
simultaneously). The bidirectional Transformer works as a battery Charger. The hot AC
input from the Grid (GrID LINE) or from the Generator (GEN LINE) is fed to the hot input
of the bi-directional Transformer for battery charging and at the same time, it is passed
through to the hot Out (OuTPuT LINE) for powering the AC loads
When Grid / Generator power fails, relays K2 / K3 will be de-energized and contact 4
o
switches back to contact 3. Output from the Inverter Section is fed to the bi-directional
Transformer and onwards to the hot Out (OuTPuT LINE) for powering the AC loads
Switching of bonding of output neutral to chassis ground
40A rated SPDT relay K4 is used to switch the bonding of the Output Neutral Connector
o
(OuTPuT NEuTrAL) to the chassis of the unit
When Grid / Generator Power is available, relay K4 will be energized and contact 4
o
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
When Grid / Generator power fails, relay K4 will be de-energized and contact 4 switches
o
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)
4.5.3 operation of transfer relays and output neutral to chassis ground
bond Switching relay – evo-3012 and evo-4024
refer to Schematic at fig 4.1(b)
the bi-directional transformer is used as follows:
feeds AC output from the Inverter Section when Grid / Generator power is not available.
o
feeds Grid / Generator power to the battery Charger Section when Grid / utility are available.
o
general Description & Principles of Operations
SAMLEX AMErICA INC. | 65