A Surge Protector Should Be Effective

To be effective, a surge protector must act to reduce all surges to a voltage level the equipment it is protecting can tolerate. This requires that the surge protector be designed and tested to all recognized surge waveforms representative of the environment.

DEHN has tested its surge protectors to all surge waveforms representative of the environment, including the newer 10/350 us waveform representative of direct condusted lightning strikes. DEHN products are specifically designed to meet the highest levels of conducted 10/350 us surger current in the latest edition of ANSI/IEEE C62.41.2, Recommended Practice on Characterization of Surge Voltages in Low-Voltage (1000 V and less) AC Power Circuits. Some manufacturers use a scaling factor to predict 10/305 us lightning event performance based on testing with an 8/20 us waveform. DEHN believes it is necessary to test with the actual 10/350 us waveform rather than relying on scaling factors. This is because each element in the arrestor would require a different scaling factor. Scaling factors for non-linear elements such as MOVs are highly dependent on current sharing and the characteristics of the manufacturer's MOV. Scaling factors for linear devices such as fuses are vastly different than for non-linear components. Because of this, only testing with the 10/350 us waveform is truly representative of performance for protection against direct lightning strikes.

Inductive voltage drop should be minimized for optimum protection by keeping lead length to the surge protector to a minimum. DEHN incorporates a finger safe fused disconnect inside the surge protector. This eliminates the need to install a separate disconnect in series with the surge protector and eliminates the additional lead length required for such disconnect.

A business without a TVSS unit runs the risk of lost data, erroneous signals and false system operations. With Dehn's quality TVSS products you can always rest assured that business is in good hands. Contact us today to learn more about our lightning and surge protection products.

	Goal	DEHN Inc. S Series	Typical Protector
Effective	The surge protector should protect the equipment from damage or upset due to induced surges or conducted lightning events	Engineered and tested to withstand long waveform 10/350 us conducted lightning surges per IEC and IEEE standards Finger safe fuses and dead front cover provide integrated means to disconnect	Only tested for induced surges, may fail on longer waveform conducted surges Requires seperate disconnect for maintenance, increases inductive voltage drops

• A Surge Protector Should Be Effective
• A Surge Protector Should Last a Long Time
• A Surge Protector Should Be Safe
• A Surge Protector Should Be Easy To Use