QUICKTEST - Section 6
6-16 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
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CU M004 01A
6.11 TRANSFORMER DIFFERENTIAL TEST.
ANSI#:
87
Hardware requirements: MTS-3010 (Digital I/O module),
MTS-3060 (AC CURRENT) or MTS-3030 (CONVERTIBLE V/I module)
Version:
1.3
6.11.1 Test Description
1.
Slope:
Determines the slope of a restrained differential element for up to three points.
2.
Operate time:
Determines the operate time vs. operate current for up to three points.
3.
2
nd
Harm rest.: Determines the percentage of 2
nd
harmonic required to restrain the trip element.
4.
5
th
Harm rest.: Determines the percentage of 5th harmonic required to restrain the trip element.
5.
Unrest. P/U: Determines the pickup threshold of an unrestrained over current element.
Input Parameters:
1.
Relay Id:
Six digit numeric identifier for relay
2.
Tap1:
The tap setting of current winding #1. [
Range 0.01 – 50.0 A]
1
3.
Tap2:
The tap setting of current winding #2 [
Range 0.01 – 50.0 A]
1
4.
IopU.:
The multiple of tap required to operate the unrestrained element. [
Range 0.01 – 10.0].
4
5.
IopR.:
The multiple of tap required to operate the restrained element. [
Range 0.01 – 10.0].
6.
toper.:
The operate time. [
Range 0.0 – 10.0 sec
.]
7.
Phase:
The phase angle between the two test currents. [
Range 0.0– 359.9
°
]
8.
2
nd
H/R:
The percentage of 2
nd
harmonic required to restrain the trip element. [Range 0-50%]
9.
5
th
H/R:
The percentage of 5th harmonic required to restrain the trip element. [Range 0-50%]
10. # of steps:
The number of test steps to perform for the operate time and slope tests. [
Range 1 – 3]
11. Start I1:
The I1 test current for the first iteration of the operate time and slope tests
[Range 0.1-
25A]
12. Step I1:
The I1 test current to be added for each iteration of the slope test.
[Range 0.1-25A]
13. Start I2:
The I2 test current for the first iteration of the operate time test.
[Range 0.1-25A]
14. Step I2:
The I2 test current to be added for each iteration of the operate time test.
[Range 0-
25A]
15. I max:
The maximum test current to be applied during the test. [
Range 0.0 – 50.0 A]
Output Results:
1.
Slope:
Measured slope of the restrained differential element for up to three points.
2.
Operate time:
Measured operate time vs. operate current for up to three points.
3.
2
nd
Harm rest.: The percentage of 2
nd
harmonic content required to restrain the trip element.
4.
5
th
Harm rest.: The percentage of 5
th
harmonic content required to restrain the trip element.
5.
Unrest. P/U: Measured operate current [A] for the unrestrained over current element.