Losing power while plugged into Shore ? Follow up more info

[supercub]

50 amp, plugged into shore power. It's 98 degrees outside, running both AC's, TV, Direct Box and frig.
In the last couple of hours, I've lost the power 5 times, after 30 seconds to a minute, it comes back on. I called the office and they're not losing power. What do you think? Is it the shore power end, or something in my motor home? Thanks

I'm on the end of a row, the camper next to me, has lost power also. His breakers are popping.
Maintenance checked my pedestal and one was 113 and the other around 119.
On my Progressive Industries EMS-LCHW 50 which has surge protection, I'm getting the following readings.
L-1 108V 8A Code EO low voltage
L-2 116V 21A Code is good.

[rgatijnet1]

If there is a Home Depot nearby you can buy one of those Kill-A-Watt meters that plugs in to any 120 volt electrical outlet. They sell for about $20. With this you can monitor your exact voltage at any given time and take a photo of the voltage to give to the park owner.
One of the problems with low voltage is that it puts a strain on any motor, such as your AC compressor/fan. For them to function, they need to draw more amps than normal when the voltage is lower than normal. This means they will run hotter and can also trip any thermal sensors.
Your AC unit has it's own time-delay reset so any changes in your EMS delay will not affect the delay on your AC units.

[wa8yxm]

Dale said it, Your EMS is shutting you down due to low voltage.> Of course when the park electrician comes out it's always good because HE UNPLUGS YOU BEFORE HE READS THE VOLTAGE so there is no load.

ALso your EMS is set to the default (Short) Delay, this is not long enough to let your Air Conditioners recover, You need to re-set it to LONG delay, this means more seconds without power when it happens, but it's easier on your A/Cs.

[2chiefsRus]

From Progressive Industries website:

High/Low Voltage Protection | Whenever AC power lowers below
104 volts, or rises above 132 volts, the EMS automatically shuts down
power to the RV. The EMS will monitor the power and once the AC
power rises above 104 volts, or drops below the 132 volt level the
time delay indicator flashes for the preset time and then automatically
restores power to the RV.

Time Delay for A/C Compressor | If AC power is interrupted or
the EMS detects a fault condition, the built in time delay is activated.
There are two settings on the EMS: one is 136 seconds (02:16), and
the other is 15 seconds. Consult your air conditioner manual to see if
it has a time delay built in. If so, use the 15 second delay, if not, use
the 136-second delay. The factory setting is 15 seconds.

[supercub]

Thanks for the info. No, I won't bypass the EMS, I bought it for protection. I assume when the voltage drops, and the EMS trips off line, that it is doing so before any damage can be done to the AC's?
If 104volts plus or minus is their setting, then again, I assume anything above that is ok, not the best, but is ok, not doing any damage?
Thanks again.

[is_it_friday_ye]

I wouldn't bypass the EMS. I would try to get away with 1 a/c and a fan. And if needed, put the fridge on propane.

[Dale_Traveling]

Your Progressive Industries EMS-LCHW 50 not only has surge protection but also under and over voltage protection. The specs call out a low limit of 104 volts it could trip a little higher or lower. Either way when it trips it will recycle back to the initial plug in delay before turning power back on.

The office isn't losing power because they don't have a protection device like you do. Plus unless someone has a meter monitoring the voltage level and constantly watching they are not going to see that anything is wrong.

Your neighbor keeps tripping the breakers because of the low volts. As voltage drops a device, such as your A/C is going to demand more amps to before the same amount of work. If you A/C needs 15 amps when power is 120VAC drop the volts to 100VAC and the amps will climb to 18 amps.

Until either campers start departing and the power demand drops or you move to a different camp site there's nothing you or the camp ground can do short of rewiring power to the row your currently camped on which isn't going to happen in the next day or so.

You can throw caution to the wind and bypass the protective features of the EMS-LCHW 50 but you risk potential damage in particular to the A/C compressor motors. Give Progressive Industries a call if you are willing to take the risk.

[DownTheAvenue]

supercub wrote:

L-1 108V 8A Code EO low voltage
L-2 116V 21A Code is good.

108 volts is too low and your equipment is doing its job by disconnecting. 108 volts can damage high demand appliances like an air conditioner.

[fla-gypsy]

Low voltage shore power. Believe the EMS

[enblethen]

Low voltage is shutting down the EMS.
You need to check the voltage at the pedestal. Odds are the campground has minimal voltage. Then you and others operate the AC units which causes the voltage to drop below set point in EMS.
Make sure you water heater is running on propane and not 120 volts while AC unit on same phase is running.

[enblethen]

delete double post,

[2oldman]

What about your neighbors?

[doxiemom11]

It can be the campground electrical. There was a campground I worked at that had 3 sections wired seperately. The oldest section could not support all the rv's running everything, especially all the AC's when it got hot. One weekend while working the power would go out (main box just about burning up) wait a bit, turn it on and everyone's AC's kicked on at about the same time - that would trip it again. Could not get them to understand that everything coming on at once was also contributing to the problem. We are talking an area with about 50 rv's. Campground and county admin knew about the problem, but planned on redoing that whole section within 2 years so were doing nothing about the electric. Only happened when they were full like on a holiday weekend. What a pain as the campers took their anger and frustration out on us workers. We couldn't do anything about it. Stuck between the powers that be and the campers.

[1BryNelson]

Probably your Load Controler.