P4802ACMC datasheet(114/212 Pages) TECCOR

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CATV Equipment

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SIDACtor® Data Book and Design Guide

CATV Equipment

As cable providers enter the local exchange market, protection of CATV (Community

Antenna TV) equipment becomes even more critical in order to ensure reliable operation of

equipment and uninterrupted service.

Protection Requirements

CATV line equipment should be able to withstand overvoltages that exceed 6000 V and

surge currents up to 5000 A. CATV station protectors should be able to withstand

overvoltages that exceed 5000 V and surge currents up to 1000 A. The SIDACtor devices

illustrated in Figure 3.32 through Figure 3.35 meet these requirements.

The following regulatory requirements may apply:

• UL 497C

• SCTE IPS-SP-204

• SCTE Practices

• NEC Article 830

Power Inserter and Line Amplifier Reference Circuit

Figure 3.32 and Figure 3.33 show how the P1900ME SIDACtor device is used to protect

line amplifiers and power supplies versus using two SCRs and one SIDACtor device

(Figure 3.34). The P1900ME is used because the peak off-state voltage (VDRM) is well

above the peak voltage of the CATV power supply (90 VRMS

Ö2), and the peak pulse current

rating (IPP) is 3000 A.

Figure 3.32 CATV Amplifier Diagram

90 VAC

P1900ME

Power

Supply

CATV

Amplifiers

P4802ACMC 데이터시트(PDF) 114 Page - Teccor Electronics