More detailed information is needed. Fuses don't "trip", circuit breakers 'trip".
If the two "fuses" are wired into the 30 amp service in series, that is OK. If you have a circuit breaker with two poles or two fuses powering the 30 amp circuit, there is the possibility that 240V is present at the receptacle. That is not a good thing.
If you could, describe the voltage meter that you are using for measurement of voltage. "Red" lacks details.
If this is a new installation, I'd suggest to call back the electrician that did the installation and emphasize that the installation is for 120V.