Quote:
Originally Posted by shiggs68
Notice the attach specifications for the Progressive Industries Surge Protectors with EMS, both 30 and 50amp modules monitor for 104 to 132vac range. Any voltage outside this range will shutdown the connection.
On a side note, if your RV has a Energy Management System, the 50amp shore power is monitored for 240vac hot to hot. If not present, the system assumes you are using a 30amp adapter and shreds various loads to keep you under the 30amp limit.
Also the 120/240 volt availability is the result of a center tapped transformer, not a 3-phase delta connection. It’s sometimes called split-phase. Same as the service provided to your sticks and bricks home.
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Do you know for sure..100% that it is monitored for 240V? I was thinking that it monitored each individual hot leg, with respect to neutral. And also the question that I am wondering is that when they designed the system, did they build in the monitoring voltage to include a 208 wye connected system....and thus allow for the sensor to accept the 208 volt in addition to the normal 240V that it would see with a center-tapped single phase transformer.
I don't think I ever mentioned the words...."3-Phase Delta connection". But if the park is using a 3 phase wye type setup, then the first pedestal would most likely have phase A and phase B and a neutral. The second pedestal would have phase B and phase C and a neutral, then the third pedestal would have phase A and phase C and a neutral......then repeat for pedestals 4, 5, and 6.....and so on.
And the part above that you have circled in red, proves nothing, other than what the system monitors as far as 120 volts. As long as your voltage is within those parameters, it doesn't care if the voltage is coming from a single phase center-tapped transformer that you would traditionally see at your house, or if it is two of the three phases from a 3 phase wye connection......the monitoring points inside the EMS is looking for the 120 volts on both of the legs....or should I say, that the voltage is within the parameters that is set ...104 - 132 volts. It doesn't say anywhere that I can find that it is monitoring for 240Volts.