Saved By PT50C - Proof
We have had several days of thunderstorms in this area in the past couple of weeks including a tropical storm and during one of them lightning struck a pine tree that was close to a large fresh water ...
Forum Discussion
Dozens of powerful inductive loads switching on and off make an RV park environment similar to that inside a popcorn cooker. Switched power supplies are neat, but Microwave, and 120 vac refrigerator switching electronics along with anything else not supplied 100% by switched power is vulnerable.
Combine the above with an elementary function of transformer loading (2 phases low voltage pops the remaining phase high) and it becomes a festival of bad power.
High amperage power distribution done correctly takes a lot of money. And a 300 ton trawler has to be constructed a lot more robustly the any NEMA or NEC code mandates. Add the wear and tear of campers driving away while still connected, poisoning a perfectly good receptacle with a ---- can plug, and RV Park electrical suddenly becomes expensive high maintenance.
It's not merely connecting a meter across L1 and L2 that will reveal whether or not voltage is adequate. What if this 50-amp connection has a low L1 and a high L2? Yes you get 240 volts, but this can be done with 105 and 135 volts as measured to L0
Monitoring both phases is the only way to keep abreast of actual line voltages.
This is a question...
Do EMS systems measure both phases and fault both phases if -either- phase exceeds performance limits (L1 to L0 and L2 to L0)?
Combine the above with an elementary function of transformer loading (2 phases low voltage pops the remaining phase high) and it becomes a festival of bad power.
High amperage power distribution done correctly takes a lot of money. And a 300 ton trawler has to be constructed a lot more robustly the any NEMA or NEC code mandates. Add the wear and tear of campers driving away while still connected, poisoning a perfectly good receptacle with a ---- can plug, and RV Park electrical suddenly becomes expensive high maintenance.
It's not merely connecting a meter across L1 and L2 that will reveal whether or not voltage is adequate. What if this 50-amp connection has a low L1 and a high L2? Yes you get 240 volts, but this can be done with 105 and 135 volts as measured to L0
Monitoring both phases is the only way to keep abreast of actual line voltages.
This is a question...
Do EMS systems measure both phases and fault both phases if -either- phase exceeds performance limits (L1 to L0 and L2 to L0)?
