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

Motor Start Trending

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.
Date Code 20080918
Courtesy of NationalSwitchgear.com
=>>MSR 3 <Enter>
SEL-749M
MOTOR RELAY
FID=SEL-749M-R100-V0-Z001001-D20031210
Date of Motor Start
Time of Motor Start
Number of Starts
Start Time (s)
Start %TCU
Max Start I (A)
Min Start V (V)
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

For each motor start, the relay stores a motor start report and adds this data
(described in Summary Data on page
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.
Instruction Manual
Metering and Monitoring
Motor Start Trending
Date: 02/27/2007 Time: 15:49:22.845
Time Source: internal
CID=1988
11/07/2003
12:37:13.257
3
6.8
92
1403
4116
5.6) to the motor start trending buffer.
5.7
SEL-749M Relay