36 | SAMLEX AMERICA INC.
SAMLEX AMERICA INC. | 37
SECTION 8 |
Installation
In the “Schuko” Receptacle, Type CEE 7/3 (Fig 8.2.2), the Left and Right sockets (2.1, Fig
8.2.2) are internally connected to the 2 current carrying conductors of the AC output of
the inverter (“Left” and “Right” is referenced when the receptacle is viewed from the
front). Voltage of 230VAC will be seen between the Left and Right sockets. Both these
sockets are isolated from the metal chassis Ground of the inverter (7, Fig 6.1). Hence, in
this “Schuko” Receptacle, Type CEE 7/3, there is NO Neutral and both the Left and Right
sockets will be HOT / LIVE and will be at elevated voltage with respect to the metal chas-
sis Ground / Earth Ground as follows:
• Left socket with respect to the metal chassis Ground / Earth Ground: 215 +/- 5VAC
• Right socket with respect to the metal chassis Ground / Earth Ground: 17 +/- 5VAC
• NOTE: Voltage between the Left and Right sockets will be the rated voltage of 230 VAC
The 2 spring contacts (2.2, Fig 8.2.2) on the periphery are internally connected to the
metal chassis Ground of the inverter (7, Fig 6.1) which is, in turn, connected to the Earth
Ground Terminal of the premises where the inverter is installed. When the “Schuko”
Plug, Type CEE 7/7 (Fig 8.2.1) of the Power Cord of the AC load is inserted into the
“Schuko” Receptacle, Type CEE 7/3 (Fig 8.2.2) on the inverter, the metal chassis Ground
of the AC load is automatically connected to the Earth Ground Terminal of the premises
where the inverter is installed.
WARNING!
As explained above, in “Schuko” Receptacle, Type CEE 7/3 (Fig 8.2.2), there is
NO Neutral and both the Left and Right sockets will be HOT / LIVE and will be
at elevated voltage with respect to the metal chassis Ground of the inverter.
The mating “Schuko” Plug, Type CEE 7/7 is NOT polarized i.e. the plug can
be inserted in the receptacle in 2 orientations. Ideally, a Double Pole Switch /
Breaker will be required on the load side to safely disconnect both the HOT /
LIVE AC input lines from the internal downstream sections of the AC load. If
a single pole AC Input ON/ OFF Switch / Breaker is used on the AC load for AC
input, it is likely that the Switch / Breaker may get connected in series with the
lower voltage current carrying conductor (17 +/- 5VAC with respect to the metal
chassis Ground). Hence, even when the ON/OFF Switch / Breaker on the load
has been switched OFF, the higher voltage current carrying conductor (215 +/-
5VAC) may still remain connected to the internal downstream sections of the
load and will be a shock hazard!
8.5.2 Providing Backup Power Using Transfer Switch
For this application, use a Transfer Switch that has Double Pole, Double Throw Contacts.
- Feed utility power and output power from the inverter to the two inputs of the Trans-
fer Relay.
- Feed the output of the Transfer Switch to a Sub-Panel to feed AC loads requiring
backup power.
Summary of Contents for PST-60S-48E
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