CLP270M

11/24

2/10 µs

GENERATOR

+/- 2.5 kV

(500 A)

4

TIPL

TIPS

GND

1/2 CLP270M

I1

V1

Rsense

Rp

Fig. 10: Lightning simulation test.

Fig. 11: CLP270M response to a positive surge.

Fig. 12 : CLP270M response to a negative surge.

Tables 1 to 6 summarize the surge needs defined by Bellcore regarding both lightning and AC power fault.

In case of first level test, the equipment under test shall be operating after the surge. For the second level

tests, the equipment under test may be damaged, but no fire or electrical safety hazard may occur.

3.2. First level lightning surge:

3.2.1. ringing mode

Lightning phenomena are the most common surge causes. The purpose of this test is to check the

behavior of the CLP270M against these lightning strikes.

Figures 11 and 12 show that the remaining overvoltage does not exceed +/- 500 V. The CLP270M

2/10 µs

GENERATOR

+/- 5 kV

(500 A)

4

TIPL

TIPS

GND

1/2 CLP270M

I

V1

50

I2

SLIC

LCP1511D

-48V

V2

1

Rsense

Rp

Fig. 13: Lightning test in speech mode.