Power Supply
Guidelines for the Power Supply General guidelines The following guidelines should be observed regarding the power supply: A surge limiter must be installed at the junction where the flex enters the building. Disturbances to the mains power are dampened by industrial line filters installed at the entrance to the system. Sensitive devices are protected by surge limiters and surge arresters at the input feed. Transformers can also be used as filters. For high frequency disturbances the transformer must be equipped with single, or preferably double, shielding.
Example: Solution for the power supply The following illustration shows an example of filtering the mains power by using a double isolated transformer:
NOTE: A good ground connection is vital when installing transformers. The transformer housing must be bolted to a conductive earth plane.
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