Samlex Power PST-150-12 Manuel Du Propriétaire page 39

SECTION 10 |
10.4 HIGH DC INPUT VOLTAGE SHUTDOWN
If the voltage at the DC input terminals rises to 16.5V or higher for PST-150-12 or, to 33V
or higher for PST-150-24, the AC output will be shut down temporarily. The Status LED (2,
Fig 6.1) will turn ORANGE and there will be buzzer alarm. The unit will be reset automati-
cally when the voltage drops down to < 16.5V for PST-150-12 or to < 33V for PST-150-24.
10.5 OVER-TEMPERATURE SHUT DOWN
In case of failure of the cooling fan or in the case of inadequate heat removal due to
higher ambient temperatures / insufficient air exchange, the temperature inside the unit
will increase. The temperature of a critical hot spot inside the inverter is monitored
and at 95° C, the AC output of the inverter is shut down temporarily. The Status LED (2,
Fig 6.1) will turn ORANGE and a buzzer is sounded.
The unit will automatically reset after the hot spot has cooled down to 70°C.
10.6 INTERNAL NEUTRAL TO CHASSIS GROUND BOND FOR GROUND
FAULT PROTECTION
The Neutral slots of the 2 NEMA5-15R outlets (1, Fig 6.1) are internally bonded to the
metal chassis of the inverter for protection against Ground Fault.
In case of mobile applications where it is not possible to ground the metal chassis of
the inverter, please ensure that the AC loads are connected through a 2-pole, 3 Wire
Grounding type of cord with a NEMA5-15P, 3-Pin Plug. This will provide protection
against electric shock in case of Ground Fault in the load (Line voltage leaking to the
metal chassis of the load). Fault current will flow through the Grounding Conductor to
the chassis of the inverter and onward to the Neutral of the inverter (through internal
Neutral to the chassis Ground bond) and will shut down the inverter due to overload /
short circuit protection of the inverter.
10.7 INTERNAL DC SIDE FUSE
The following internal fuses have been provided to protect DC input circuitry:
• PST-150-12: 20A / 32V, Blade Type, Type ATO
• PST-150-24: 10A / 32V, Blade Type, Type ATO
The fuse is installed in Fuse Holder. Hence, it can be easily removed / replaced.
10.8 REVERSE POLARITY AT THE DC INPUT TERMINALS
The Positive of the battery should be connected to the Positive DC input terminal of the
inverter and the Negative of the battery should be connected to the Negative DC input
terminal of the inverter. A reversal of polarity (the Positive of the battery wrongly con-
nected to the Negative DC input terminal of the inverter and the Negative of the bat-
tery wrongly connected to the Positive DC input terminal of the inverter) will blow the
external / internal DC side fuses. If the DC side fuse is blown, the inverter will be dead.
The Status LED (2) will be switched OFF and there will be no AC output.
Protections
SAMLEX AMERICA INC. | 39