CLP270M

15/24

The CLP270M withstands the second level lightning surge test without trouble.

3.4. FIRST AND SECOND LEVEL AC POWER FAULT

4

I1

V1

V(RMS)

50Hz

Rsense

Rp

TIPL

TIPS

GND

1/2 CLP270M

Rs

Fig. 22: AC power fault test in Ringing mode.

Fig. 23: Example of behavior when facing test 3

(400V, 600

Ω).

4

Ω

Ω

TIPL

TIPS

GND

1/2 CLP270M

50

SLIC

LCP1511D

-48V

V2

Rsense

Rp

V(RMS)

50 Hz

I1

Rs

Fig. 24: AC power fault test in Speech mode.

Fig. 25: Example of behavior when facing test 3

(400V, 600

Ω).

3.4.1. Ringing mode

The figures 23 and 25 give the voltage and current at the CLP270M terminals in Ringing mode and Speech

mode. The CLP270M is able to withstand all the first level AC power fault tests as required in the table 4-7

of GR-1089-CORE standard.

For the second level AC power fault tests serial protection as PTC or fuse are needed.

All these curves, lightning and AC power fault represent the behavior of the CLP270M in worst case tests,

any how the CLP270M withstands all the others surges of the Bellcore GR1098 standard. For the second

level AC power fault test, the use of series protection elements (PTC or fuses) are needed.