ND 951-5 61-361 Test-Pro Instru
Indicating Phase Rotation (RST)
PHASE ROTATION-TRUE RMS
HZ-MFD-AUTO OFF
V
AC
200
V
AC
600
600
200
2000m
200
2000m
20
200m
200m
RST
RST
Hz
Hz
200M
20M
200M
200k
2k
20k
20k
20M
2k
200
MFD
2A
k
MFD
CAT. LLL 600V
COM
V
!
R/L1
MAX
2A
600V
FUSED
MAX
350V/15
SEC FOR
R
200mV
RANGE
S
Function
Frequency Range
Voltage Range
Phase
50 Hz to 450 Hz
Rotation
Indicator
To Determine Phase Rotation (RST):
This test function correctly identifies each of the 3-Phases in a
power panel as R, S, T. Note: The displayed numerical value
has no meaning when performing this procedure. Maximum 3
phase voltage allowed in this mode is 500 VAC.
1. Turn power off to the circuit that is to be tested.
2. Place the function switch on the meter to "RST."
3. Plug the test leads into the meter inputs labeled as R, S, T
in the diagram above. Note that test lead colors are insignif-
icant.
4. Attach the three test leads to each of the 3-Phase cables in
any order.
5. Turn the power on.
6. If all three supply lines have power, the meter will indicate a
R, S, T (in the upper left corner).
11/26/07
4:51 PM
V
DC
2000m
200m
A
DC
A
AC
200
T
LCD indicates
80V to 500V
sequence of
three-phases.
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Indicating Phase Rotation (continued)
7. If the meter indicates "OK" in the display (upper left-hand side),
a. Turn power off to the circuit.
b. Label each phase cable as R, S, or T following the test
lead connections to the labeled meter inputs.
8. If the meter indicates an
message in the display (lower
left-hand side), the phase rotation is counter-clockwise.
a. Turn power off to the circuit.
b. Switch any two test lead connections to the phase
cables.
c. Turn power on.
d. The meter will now indicate "OK" in the display.
e. Turn the power off.
f. Label each phase cable as R, S, or T following the test
lead connections to the labeled meter inputs.
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