Type 1 + 2 protectors against transient overvoltages should be tested with 10/350 µs lightning impulse wave and 8/20 µs wave, combining the capacity to absorb lightning current with low residual voltage.
This SPD is plugged directly in the same socket as the load to be protected. It contains effective protection against transient overvoltages for single-phase power supply lines. Tight protection according to the cascade protection recommended in the Spanish Low Voltage Regulations (REBT ITC23).
Type 1 protectors against transient overvoltages should be tested with 10/350 µs lightning impulse wave, simulating the effects of direct lightning discharges.
Type 2 + 3 protectors against transient overvoltages should be tested with 8/20 µs current impulse wave and a combination impulse wave, leaving low residual voltages.