Using percentage of power supply is 80%, i.e the power of load is 240 watt, you should choose 300W output transformer, otherwise there is possibility to cause the earlier invalidation by person.
Automatic protection for: short circuit / overload / over voltage / high temp.
Wiring instruction for DC output: Please make the 3 outputs be joint to load while the load over 100W, this way be good for transformer's life span. Load's wattage not over 80% of rated power to be ideal performance.