Schweitzer Engineering Laboratories SEL-701-1, Instruction Manual

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SEL-701-1 Monitor
Date Code 20011009
Commissioning
Monitor Commissioning Procedure
6.6
NOTE:
The MOT R, MST R, and SER R commands should only be used at
initial installation. Do not reset the motor operating statistics or SER
buffer following routine maintenance unless you are very familiar with
the use of the data contained in these buffers and are certain that the
data is no longer needed.
Step 15. When it is safe to do so, start the motor.
Step 16. Verify the following ac quantities using the front-panel Meter
Values\Instantaneous Meter or serial port
METER command:
Phase current magnitudes should be nearly equal.
Phase current phase angles should be balanced, should have
proper phase rotation, and should have appropriate phase
relationship to their phase voltages.
The positive-sequence current magnitude, I1, should be nearly
equal to IA, IB, and IC.
The negative-sequence current magnitude, I2, and residual
current magnitude should both be nearly zero.
NOTE:
If the monitor reports I1 near zero and I2 nearly equal to
IA, IB, and IC, there is a phase rotation problem. Verify the
monitor ac current connections and the phase rotation
setting, PHROT. A nonzero 3I0 meter value indicates a phase
current polarity connection problem.
Table 6.1 Serial Port Commands That Clear Monitor Data Buffer
Serial Port
Command
Task Performed
MET RD Resets Demand Meter Data
MET RP Resets Peak Demand Meter Data
MET RE Resets Energy Meter Data
MET RM Resets Max/Min Data
LDP R Resets the Load Profile Data
HIS R Resets Event Report and History Command Buffers
MOT R Resets Motor Operating Statistic Buffers
MST R Resets Motor Start Trend Data
RLP Reset Learned Motor Parameters
SER R Resets Sequential Events Record Buffer