Cotek S1500-112, User Manual

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3-4-6. Set power inverter switch to the OFF position, the indicator lights
may blink and the internal alarm may sound momentarily.
The is normal. Plug the test load into the AC receptacle on the
front panel of the inverter. Leave the test load switch off.
3-4-7. Set power inverter switch to the ON position and turn the test load
On. The inverter should supply power to the load.
If you plan to accurately measure the true output r.m.s. voltage of
inverter, a meter such as FLUKE 45 BECKMAN 4410 or TRIPLETT
200 must be used.
3-5. AC Safety Grounding:
During the AC wiring installation, AC input and output ground wires
are connected to the inverter. The AC input ground wire must connect
to the incoming ground from your AC utility source.
The AC output ground wire should go to the grounding point for your
loads ( for example, a distribution panel ground bus ).
3-5-1. Neutral Grounding (GFCI’S):
3-5-1-1.
120V models: The neutral conductor of the AC output circuit
of the S1500 Inverter is automatically connected to the safety
ground during inverter operation. This conforms to national
electrical code requirements that separately derived AC
sources (such as inverter and generators) have their neutral
conductors tied to ground in the same way that the neutral
conductor from the utility is tied to ground at the AC breaker
panel. For models configured with a transfer relay, while AC
utility power is presenting and the S1500 Inverter is in bypass
mode, this connection (neutral of the S1500 Inverter’s AC
output to input safety ground) is not present so that the utility
neutral is only connected to ground at your breaker panel,
as required.
3-5-1-2.
230V models: There is no connection made inside the S1500
Inverter from either the line or neutral conductor to the safety
ground.
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