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The Portable Circuit Monitor 2000 series has built-in potential transformers of a ratio of 600:120 V. To compensate for this 5:1 V ratio, the factory default PT ratio has been set to 120:24 V. This unusual voltage secondary of 24 V could be the cause of improper voltage readings.
If the customer wishes to change the voltage secondary back to the standard 120, they need to write the value of 120 to register 2008(range for this register is 1-600). Note that the native 5:1 V ratio must still be taken into account if the voltage secondary is changed. For a system with no PTs, the primary must also be changed back to 600 V.
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