QUICKTEST - Section 6
6-4 MTS-1700 SERIES OPERATION AND REFERENCE MANUAL
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CU M004 01A
6.5 TIMED 1
Φ
Φ
Φ
Φ
OVERCURRENT TEST
ANSI#:
51
Hardware requirements:
MTS-3010
(DIGITAL I/O module)
MTS-3060 (AC CURRENT module) or
MTS-3030
(CONVERTIBLE V/I module)
6.5.1 Test Description
Tests performed:
Minimum Pickup: determines the minimum pickup threshold of a time overcurrent element.
Operate time:
determines the operate time vs. current for up to seven points.
Input Parameters:
1.
Relay Id:
Five digit numeric identifier for relay.
2.
Tap:
The expected pickup or operate current in [amps]. Range 0.01 – 75.0 A.
3.
tmax:
The maximum time required for the disk to operate in [sec]. Range 0.01 – 999.0 s.
4.
Time dial: The time dial setting of the relay (optional included for completeness of report).
5.
Imax:
The maximum test current in [amps] to be applied during testing. Range 0.1 – 75 A.
6.
Test #1 @
The multiple of tap for the first test point of the operate time test. Range 1.1– 75 xTap.
7.
Step
The multiple of tap to be added for each step of the operate time test. Range 0.1– 20 xTap.
8.
# of steps
The number of test steps to perform for the operate time test. Range 1 - 7.
Output Results:
Minimum pickup test:
Measured pickup current [A]
Operate time test:
Measured operate time [sec] vs. current [A] for up to seven points.
6.5.2 Example
1
φ
φ
φ
φ
Test Descriptions
The following example demonstrates the steps required to test the minimum pickup and operate time for an
induction disk style overcurrent relay. The 6 amp tap is being used, and the user wants to test the operate
time at: 2, 4, 6, 8, and 10 xTap or 12, 24, 36, 48, and 60A.