
SIDACtor
Data Book
GR 1089-Core
Teccor Electronics
(972) 580-7777
4 - 9
R
R
Figure 4-2 Second Level AC Power Fault and Current Limiter Connection
Current Limiting Protector Test
The purpose of the Current Limiting Protector Test (Table 4-7) is to determine if the
EUT allows an excessive amount of current flow under power fault conditions. During
this test, the EUT is connected to a circuit equivalent to Figure 4-2 with a 1.6A Type
MDQ fuse from Bussman used as the wiring simulator. If the EUT draws enough
current to open the fuse, then the acceptable time/current criteria has not been met
and external current limiting protectors must be specified for use with that equipment in
the manufacturers documentation.
Table 4-7 Current Limiting Protector Test
Applied Voltage,
60Hz
(V
RMS
)
600
Short Circuit Test
In addition to the AC Power Fault and Current Limiter Tests, Bellcore compliant
equipment must also pass a Short-Circuit Test. During this test, a short circuit condition
is applied to the following Tip and Ring appearances for thirty minutes while the EUT is
powered and under operating conditions:
Tip-to-Ring, Tip-to-ground with Ring open-circuit.
Ring-to-ground with Tip open-circuit.
Tip and Ring-to-ground simultaneously for thirty minutes.
Test
Source
Impedance
2
Duration
Test Connections
(Table 4-1, Fig. 4-2)
1
15 minutes
A
Eqiupment
Tip
Wiring
Simulator
Ring
Chassis
Ground
20
Variable
60 Hz AC
Voltage
Source 0-600V
(A) Metallic
AC Equipment Ground
(Green Wire Ground)
Eqiupment
Tip
Ring
Chassis
Ground
20
Wiring
Simulator
20
Variable
60 Hz AC
Voltage
Source 0-600V
(B) Longitudinal
AC Equipment Ground
(Green Wire Ground)
Wiring
Simulator