I have a 30 gallon Vanguard water heater 3WA79, i recently replaced the HWD Element due to the circuit breaker tripped. The element was broken causing the breaker to trip, now i connected back in plac

SOURCE: no hot water.

Please get an expert in - this is either the breaker is faulty or you have an electric fault int he boiler. You can try and replace the breaker - but match the current rating. But this could be dangerous if you keep trying to reset.

SOURCE: Rheem Hot Water Cylider Thermostat keeps tripping

Sounds like you have a faulty thermostat.  This is the unit that detects the water temperature, and if it is not where it is set, will kick the switch to allow electricity to flow to the elements you replaced. The thermostats are relatively cheap and if you have the knowledge to change the elements, changing these thermostats should not be a problem.

SOURCE: after about an hour the breaker trips

I would say then the heating element has a resistive short to ground. The 1.98m Ohm reading is high, but not high enough -- should be infinite. I would say replace heating element... And, when you install new one, make sure there is no water leaking thru heating element cavity and ensure area around cavity is clean & "in order".

How old is water heater?

Charlie

Testimonial: "He was right on the mark, after removing the element it was apparent that it was bad, split down the middle of the element twords the middle section. "

SOURCE: Hello, I have a Rheem 81V52D 50 gal. residential

It's probably bad upper or lower thermostat.
BUT... new element could also be shorted.
OR ... original tank is rated 1500 watt elements look at label on side of tank.
I always replace both thermostats to save time.
Lower thermostat costs $10 at Lowes.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

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Joseph Mueller

• 346 Answers
• Posted on Feb 15, 2011

SOURCE: My hot water heater tripped the circuit breaker on

Tough problem here. Most dual element heaters share one line. if this is the case and you have power on the top and none on the bottom I would check the connecting wires one to another. also check the settings of the thermostats. They may be adjusted all the way down. If the wires and connections are good I would recommend ohm testing the new elements. I have burned elements out by introducing cold water to very hot coils (forgetting to turn the water on after flipping the breaker)
Never forget that calcium buildup will short the element. If touching on the bottom you will burn it up.
If this does not help try borrowing hot water from neighbors ;)
Good luck
Joe

Testimonial: "top element = O ohms, burned out. Replaced top element, turned water on and waited for tank to fill this time "Prior" to plugging in. THANKS!! "