CLP270M

10/24

Test

Two-wire interface

Four-wire interface

A

1. Tip to generator, Ring to ground

2. Ring to generator, Tip to ground

3. Tip to generator, Ring to generator

simultaneously

1. Each lead (T, R, T1, R1) to generator with

other three leads grounded

2. Tip and Ring to generator simultaneously, T1

and R1 to ground

3. T1 and R1 to generator simultaneously,

Tip and Ring to ground

B

Tip to generator, Ring to generator

simultaneously

T, R, T1, R1 to generator simultaneously

Table 5: Test connection (table 4-1 of GR-1089-CORE).

Test

Voltage

Source

Limiting

resistance

(IF specified)

S1

S3

S2

S4

Switch

unit

under

test

T

E

R

M

T

E

R

M

Test

S1

S2

S3

S4

T to generator, R to ground

(condition A1 of table 4-1)

Closed

Open

Open

Closed

R to generator, T to ground

(condition A2 of table 4-1)

Open

Closed

Closed

Open

T to generator, R to generator

simultaneously

(condition A3 of table 4-1)

Closed

Open

Closed

Open

Table 6: Application of lightning and AC power fault test voltages (table 4-2 of GR-1089-CORE).

3.1. BELLCORE GR-1089-CORE requirements:

Tables 1 and 2 summarize the lighting surges required by the bellcore 1089.