67
TIMING TEST OF MOLDED CASE CIRCUIT BREAKERS
Note that the highest rated output terminal on the SR-98 is 115 Amperes. The
suggested test current is three times (3X) the normal current rating of the circuit
breaker. Therefore, the largest molded case breaker that the unit can test is
approximately 35 Amperes. If it is desired to test larger breakers, contact your local
MEGGER sales office or representative for recommendations. It is recommended that
the optional high current leads, PN 2265, be used to conduct this test.
1. From
the
TEST MENU
Screen, select
CURRENT RELAY
. The following test
screen should be displayed.
Connect
AC CURRENT MAIN
to the circuit breaker.
Timing Test:
1.
AC AMPERES
should already be highlighted.
2. Pressing
the
MODE SELECT
button, change from
MAINT
(Maintain) to
MOM.
(Momentary).
3. Press
the
INIT
Button. The output current should turn on for a short pulse
duration.
4.
Rotate the Control Knob and press the
INIT
Button. A new current value is
displayed. Continue until the desired current value is achieved.
5.
The current value selected in Momentary mode will be remembered. To time
short or long time delay, press the
MODE SELECT
twice to change from
MOM.
(Momentary) to
CA.
(Current Actuate) to
MAINT
(Maintain). For testing
Instantaneous trip only, press the
MODE SELECT
to
CA
(Current Actuate).
Содержание SR-98
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