P4802ACMC datasheet(152/212 Pages) TECCOR

152 / 212 page

UL 497A

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SIDACtor® Data Book and Design Guide

Performance Tests

The following key performance tests relate to overvoltage protection of the secondary

protectors:

1. Impulse Voltage Measurement Test — Secondary protectors must break down within

±25% of the manufacturer’s breakdown rating when tested in each polarity with a rate of

voltage rise of 100 V/µs, ±10%. Note that the manufacturer may assign separate

breakdown voltage ratings for the Breakdown Voltage Measurement Test. This

requirement only applies to secondary protectors that connect between Tip and Ring of

the telephone loop.

2. Breakdown Voltage Measurement Test — Secondary protectors must break down within

±25% of the manufacturer’s breakdown rating when tested in each polarity with a rate of

voltage rise no greater than 2000 V/s. The secondary protector is to be mounted in

accordance with the manufacturer’s installation instructions and then subjected to the

test circuit shown in Figure 4.10. This requirement applies only to secondary protectors

connected between Tip and Ring or Tip/Ring and Ground of the telephone loop.

3. Overvoltage Test — Secondary protectors must limit current and extinguish or open the

telephone loop without loss of its overvoltage protector, indication of fire risk, or electric

shock. Upon completion of this test, samples must comply with the Dielectric Voltage-

withstand Test.

The overvoltage test is used to determine the effects on secondary protectors and is shown

in Table 4.18. Test connections are shown in Figure 4.11.

Test Compliance

Compliance with the overvoltage test is determined by meeting the following criteria:

• Cheesecloth indicator may not be either charred or ignited

• Wiring simulator (1.6 A Type MDQ fuse or 26 AWG line cord) may not be interrupted

• Protector meets the applicable dielectric voltage withstand requirements after the

completion of the overvoltage tests

Notes:

1. Apply Tests L1, L2, and L5 between Tip and Ground or Ring and Ground.

2. Apply Tests L3 and L4 simultaneously from both Tip and Ring to Ground.

Table 4.18 UL 497A Overvoltage Test

Test

Voltage

(VRMS)

Current

(A)

Time

Connection

600

1.5 s

(Note 1, Figure 4.11)

600

5 s

(Note 1, Figure 4.11)

600

2.2, 1, 0.5, 0.25

30 min at each

current level

(Note 2, Figure 4.11)

200 V rms or just below

the breakdown voltage of the

overvoltage protection device

2.2 A or just below the interrupt

value of the current interrupting

device

30 min

(Note 2, Figure 4.11)

240

30 min

(Note 1, Figure 4.11)

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