P6002ACMC datasheet(119/212 Pages) TECCOR

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Secondary Protection

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SIDACtor® Data Book and Design Guide

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Secondary Protection

Secondary protectors (stand alone units or integrated into strip protectors and UPSs) are

adjunct devices used to enhance the protection level of customer premise equipment

(CPE). Due to the inadequate level of protection designed into CPE, secondary protectors

often are required to prevent premature failure of equipment exposed to environmental

hazards (Figure 3.38).

Figure 3.38 CPE Secondary Protection

Protection Requirements

Secondary protectors should be able to withstand overvoltages that can exceed 800 V and

surge currents up to 100 A. Figure 3.39 illustrates a SIDACtor device selected because the

associated peak pulse current (IPP) is sufficient to withstand the lightning immunity tests of

TIA-968 (formerly known as FCC Part 68) without the additional use of series line

impedance. Likewise, Figure 3.39 illustrates a fuse selected because the amps2time (I2t)

rating is sufficient to withstand the lightning immunity tests of TIA-968, but low enough to

pass UL power cross conditions.

Figure 3.39 CPE Protection

Tip

Phone

Fax/Modem

Primary

Protector

Line

Impedance

Customer

Premise Equipment

Network

Interface

Secondary

Protector

Ring

To CPE

Equipment

P3203AB

P3203AC

Tip

Ring

F1250T

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