Almost new kitchen installation, including consumer unit & appliances. Just out of warranty period. Electrolux EOB6632 built in oven trips main circuit breaker (VR80 - 80A/30mA), BUT ONLY ON THERMOSTAT SETTINGS OF 180C OR ABOVE, when oven reaches set temperature. Individual CB for oven not affected. Not apparently a continuous rating problem. Seems to be a current spike when oven clicks off, buy why only at settings of 180C and above? Installation electrician says the VR80 is particularly sensitive, but that doesn't solve the problem!