![background image](http://html1.mh-extra.com/html/eaton/digitrip-rms/digitrip-rms_instruction-leaflet_3887576015.webp)
Fig. 6.
Partial Internal Connections of an RD Breaker
6.2.3 General Test Instructions
The interconnected system shall be evaluated in accor-
dance with the equipment assembler
'
s detailed instruc-
tions by qualified personnel.
The polarity of the neutral sensor connections (if used)
must agree with equipment assembler
'
s detailed instruc-
tions to avoid improper operations following apparently
correct simulated test operations. Where a question
exists, consult the specifying engineer and/or equipment
assembler.
The grounding points of the system shall be verified to
determine that ground paths do not exist that would
bypass the sensors. The use of high-voltage testers and
resistance bridges may be used.
THERE IS A HAZARD OF ELECTRICAL SHOCK OR
BURN WHENEVER WORKING IN OR AROUND ELEC-
TRICAL EQUIPMENT. ALWAYS TURN OFF POWER
SUPPLYING BREAKER BEFORE CONDUCTING
TESTS.
Using a low voltage (0 to 24-volt), high current, ac source,
apply a test current of 125% of the Digitrip RMS Ground
Fault Trip Unit pick-up setting through one phase of the
circuit breaker, as shown in Fig. 7-1. This should cause
the breaker to trip in less than 1 second, and if an alarm
indicator is supplied, it should operate. Reset the breaker
and the alarm indicator. Repeat the test on the other two
phases.
If the system is a 4-wire system with a neutral current
sensor, apply the same current as described above
through one phase of the breaker, returning through the
neutral sensor, as shown in Fig. 7-2. The breaker should
not trip, and the alarm indicator, if supplied, should not
operate. Repeat the test on the other two phases.
If the system is a 3-wire system with no neutral current
sensor, apply the same current as described above
through any two phases of the breaker, with the connec-
tions exactly as shown in Fig. 7-3. The breaker should
not trip, and the alarm indicator, if supplied, should not
operate. Repeat the test using the other two combina-
tions of breaker phases.
WARNING
EATON CORPORATION www.eaton.com
Page
15
Effective Date October 2010
Instruction Leaflet 29C713E
Effective October 2010