Schweitzer Engineering Laboratories SEL-749M - Motor Start Trending; Figure 5.5 Motor Start Report Example

5.7
Date Code 20080918 Instruction Manual SEL-749M Relay
Metering and Monitoring
Motor Start Trending
=>>MSR 3 <Enter>
SEL-749M Date: 02/27/2007 Time: 15:49:22.845
MOTOR RELAY Time Source: internal
FID=SEL-749M-R100-V0-Z001001-D20031210 CID=1988
Date of Motor Start 11/07/2003
Time of Motor Start 12:37:13.257
Number of Starts 3
Start Time (s) 6.8
Start %TCU 92
Max Start I (A) 1403
Min Start V (V) 4116
Cycle, IA (A), IB (A), IC (A), IN (A), VAB (V), VBC (V), VCA (V), %TCU
5.00,1401,1401,1399,0,4119,4122,4146,3
10.00,1399,1399,1399,0,4118,4124,4147,3
15.00,1398,1403,1398,0,4118,4123,4147,3
20.00,1399,1399,1396,0,4119,4122,4147,3
.
.
.
1800.00,199,199,201,0,4117,4123,4146,90
1805.00,201,201,202,0,4119,4120,4148,90
1810.00,201,199,200,0,4118,4119,4140,90
1815.00,200,200,200,0,4117,4122,4149,90
1820.00,201,199,200,0,4118,4124,4148,90
.
.
.
3595.00,199,201,199,0,4114,4121,4144,89
3600.00,200,200,198,0,4115,4124,4144,89
Figure 5.5 Motor Start Report Example
Motor Start Trending
For each motor start, the relay stores a motor start report and adds this data
(described in Summary Data on page 5.6) to the motor start trending buffer.
Motor start trending tracks motor start data for the past eighteen 30-day
periods. For each 30-day interval, the relay records the following information:
➤ the date the interval began
➤ the total number of starts in the interval
➤ the averages of the following quantities:
➢ Motor Start Time
➢ Start % Thermal Capacity Used
➢ Maximum Start Current
➢ Minimum Start Voltage, if Voltage Inputs card option
installed
View the motor start trending data using the serial port MST command.
Figure 5.6 shows data from an example Motor Start Trend Report.
NOTE: While the relay power is off,
the elapsed timers do not advance. If
relay power is off for a significant
amount of time, the elapsed calendar
time will not match the elapsed time
recorded by the relay.
NOTE: All the trend data collected
each day are added to nonvolatile
memory at midnight. If the relay
power is removed, the information
collected between midnight and
power removal is lost.
Courtesy of NationalSwitchgear.com