Voltage variations and Surge cut off.
We are hooked up to 50A service. I just recorded the voltages at different areas and I will note them below. I have a Progressive EMS/Surge suppressor hard wired in just before the breaker box. It has always worked well and has saved the coach several times at CG. My problem is it seems, there is a voltage rise on one leg at night, about 3 a.m. and when the heat pump goes on the EMS cuts the current. Both legs are high, but one is about 130V.
Taken 11 A.M. today
1. Voltage at post. Both legs 121 V
2. Inside at input to EMS Leg 1 = 128V 0 A Leg 2. 127 V 0 A
3. With Air on
Leg 1 130 V o A Leg 2 121 18A
4. With A/C fan on only
Leg 1 129 0A Leg 2 125 V 8A
5. With Heat Pump on.
Leg 1 130V 0 A Leg 2 122 V 17 A
The A/C voltage does drop during the day with no problems. If I shut off the electric water heater, there are no problems running the heat pump on heat during the night.
As you can see, there are voltages differences between the post and the EMS input. That is why I feel something in the RV is raising the voltage. ANY IDEAS WILL BE APPRECIATED.
By the way, I do not have a generator and I am sure that on my unit there was no transfer switch installed unless you had one.
Taken 11 A.M. today
1. Voltage at post. Both legs 121 V
2. Inside at input to EMS Leg 1 = 128V 0 A Leg 2. 127 V 0 A
3. With Air on
Leg 1 130 V o A Leg 2 121 18A
4. With A/C fan on only
Leg 1 129 0A Leg 2 125 V 8A
5. With Heat Pump on.
Leg 1 130V 0 A Leg 2 122 V 17 A
The A/C voltage does drop during the day with no problems. If I shut off the electric water heater, there are no problems running the heat pump on heat during the night.
As you can see, there are voltages differences between the post and the EMS input. That is why I feel something in the RV is raising the voltage. ANY IDEAS WILL BE APPRECIATED.
By the way, I do not have a generator and I am sure that on my unit there was no transfer switch installed unless you had one.
