Need to know which EM4800 CTs need shorting blocks.
Installation of the shorting block with EM4800 CT's.
When using 80 mA CTs or 5 A CT's, shorting blocks are recommended. 333 mV CT's do not require shorting blocks because they have a burden resistor built into the CT that limits the output voltage to 333 mV under all conditions.
NOTE: If a 1/3 V CT was shorted, the internal burden resistor and the CT would be shorted at the same time. This would effectively be the same as shorting a current secondary CT and would cause no harm, despite the fact that it is not needed.