Sima Products STP-3000 - Manual (Page 8)

B. Ground Wiring
The Sima STP-3000 has a lug on the rear panel to connect the chassis of the inverter and its AC output ground to the AC distribution
system ground. This chassis ground lug must be connected to a grounding point, such as the chassis ground of a vehicle, or the
grounding system of a boat, or the earth ground via a ground rod (a metal rod pounded into the earth), or other proper service en-
trance ground. Use a # 8 A WG or larger copper wire (preferably with Green/Yellow insulation) to connect the chassis ground lug to
the grounding point. The neutral (common) conductor of the Sima STP-3000 AC output circuit is also connected to chassis ground to
conform to the National Electrical Code requirements. Set the ON/OFF switch on the Sima STP-3000 to the ON position. Check the
battery voltage indicator if it indicates within 12 to 13-volts. If it does not, check your battery and connections to the Sima STP-3000
inverter. The other indicators should be off.
WARNING! Do not operate the Sima STP-3000 without connecting it to ground. Electrical shock hazard may result.
6. Operation
Switch ON the Sima STP-3000 from the front panel to operate the inverter. It is now ready to drive AC loads. Turn each appliance on individually for
multiple operations after switching on the STP-3000 inverter so as to reduce the simultaneous starting currents from all loads.
6.1 Front Panel Controls and Indicators
A. ON/OFF Switch
The ON/OFF switch turns the control circuit of the Sima STP-3000 ON and OFF (See Figure 3). It does not disconnect DC power from the battery to
the Sima STP-3000 inverter.
The Sima STP-3000 consumes about 0.2mA of current from the battery with the switch at the OFF position. It draws less than 700mA of no-load
current from the battery with the switch at the ON position. A 100 ampere-hour battery can last more than a week discharging at this low current level.
Switch the inverter off if battery is not recharged within a week or so.
B. Remote ON/OFF Jack
The Sima STP-3000 supports remote ON/OFF switch via an optional jack which allows users to switch the inverters ON or OFF away from the
installation panel (See your SIMA dealer for more details on the STP-3000 Remote ON/OFF switch).
C. Battery Voltage Indicator
This indicator displays the input voltage to the Sima STP-3000 inverter. It gives
readings close to the battery voltage for low input currents but gives lower readings
than the battery voltage due to voltage drops across cables and connections for high
input currents.
The Sima STP-3000 inverter may shut down when voltage goes into the red area at
the top or bottom of the indicator. Normal operations should register readings in the
green zone.
D. Battery Current Indicator
It displays the current drawn from the battery by the Sima STP-3000 only.
Normal operations register current readings in the green area with transient
operations occasionally in the yellow zone. If current level goes to the red area, the
STP-3000 will reduce its output voltage to protect itself.
E. OVERTEMP Indicator
Overheating of the Sima STP-3000 results in shutting-down itself, lighting up the OVERTEMP indicator, and sounds the alarm buzzer.
Over-temperature is result of operating power ratings over 2500 watt continuous output or being installed in poorly ventilated location. It will
automatically restart after cooling down .
F. OVERLOAD Indicator
Overloading the Sima STP-3000 shuts the inverter down with the OVERLOAD indicator signaled. Reset the invert to OFF position, then clear the fault
(remove/unplug the load), before switching the ON/OFF switch back to ON.
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