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4.2
Optional 220 Watt Limiter
The minimum requirement for the 5220 is a limiter operating at a nominal voltage of 14 V.
This limiter is a shunt type voltage limiter that regulates the output voltage of the gener-
ator. The main components of the Limiter are shown in Figure 7, and explained below:
Protective (Voltage) Limiter: A voltage limiting circuit is incorporated into the 220 W
Limiter, which limits input voltage helping achieve optimal performance from the TEG.
It is factory set to activate at 14.1 V for the model 5220 TEG. Unless the generator is
equipped with an optional CP System. In this case, the voltage is factory set at 17.5 V.
Current Limiter: Over load protection triggers when the load draws excess current.
The result is a proportional drop in output voltage, fold-back current limiting.
Short circuit protection is also designed into the 220 W Limiter. A diode in series with
the positive output prevents current from flowing back through the converter when the
generator is shut off.
Caution:
Gentherm Global Power Technologies
5220
If extended short circuit durations are anticipated, an in-line fuse
should be placed on the output of the limiter converter.
Figure 7 220 Watt Limiter
28142 Rev. 14
4-7
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