Eaton NRX Serie Montageanweisung Seite 3

Instructions for Series NRX Neutral
Current Sensor – Type RF
3.594"
9,1 cm
5"
12,7 cm
1.227" at 5"/ 3,1 cm at 12,7 cm Bus Bar
0.227" at 4"/ 0,6 cm at 10,2 cm Bus Bar
Figure 2. Sensor Installation Information - Type RF
N
X
Neutral Sensor
Figure 3. Neutral Current Sensor Application (IEC)
N otee: Since the ground fault circuit breakers derive their operating power from
the phase current and not from the neutral current, passing current through the
neutral sensor only will not properly test the ground fault feature.
Using a low voltage (0-24v) high current AC source, apply a test current
of 125% of the ground fault pick-up setting through one phase of the
Bus Bars
Sensor Outline
Details
Source
L C R
15 16
Load
Top of Bus Bar
0.5"/1,27cm
0.984"/2,5cm
0.984"/2,5cm
0.984"/2,5cm
5" or 4"
12,7 cm or
10,2 cm
4x ø 0.41"
1,04cm
Bus Bar
0.5"/1,3 cm
Details
circuit breaker as displayed in Figure 4. 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 displayed in Figure 5.
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 connections as displayed in Figure 6. The breaker
should not trip and the alarm indicator, if supplied, should not operate.
Repeat the test using the other two combinations of breaker phases.
Record the test results on the test form provided with the equipment.
FIELD TESTING SHOULD BE USED FOR FUNCTIONAL TESTING, NOT FOR
FIELD CALIBRATION. IF TEMPORARY CONNECTIONS WERE MADE FOR
THE PURPOSE OF CONDUCTING TESTS, RESTORE TO PROPER OPERATING
CONDITIONS BEFORE RETURNING THE BREAKER TO SERVICE.
ELECTRICAL SHOCK OR BURN INJURY CAN OCCUR WHEN WORKING ON
POWER SYSTEMS. ALWAYS TURN OFF POWER SUPPLYING CIRCUIT BREAKER
BEFORE CONDUCTING TESTS. TEST OUT OF THE CELL, IF POSSIBLE.
Instruction Leaflet IL01301046E
effective September 2013
0.25" at 5"/ 0,6 cm at 12,7 cm
0.375" at 4"/ 1,0 cm at 10,2 cm
0.375"/ M10 Hardware as
Required for Installation in
the Field
• CAUTION
• WARNING
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