OPERATION SUMMARY - Section 3
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 3-23
CU A002 15A
MANTA TEST SYSTEMS
5. The measured MTA is the average of the two recorded phase angle values.
6. Release the [FAULT] button or [EXTERNAL START] contact input.
7. To test other elements (A-N, B-N, C-N, A-B, B-C, C-A), simply rotate the [FAULT PHASE] selector
and repeat at step 2.
3.3.9.4 OPERATE TIME TEST.
The following procedure determines the operation time of an impedance relay element:
1. If you haven’t done so, perform steps 1-3 in the Preparation section (3.3.9.1).
2. If you haven’t done so, perform steps 2-5 of the reach test above to find the reach at the theoretical
MTA. To set the impedance to the desired percent of reach for testing, decrease the voltage, or increase
the current.
3. Release the [FAULT] button or [EXTERNAL START] contact input. Press [STATIC/DYNAMIC] to
select dynamic operation mode.
4. Press [FAULT] to initiate the fault.
5. When the relay operates, the [STOP/RESET] button will illuminate. Press [TIME] to see the operation
time. Press [TIME] again to toggle between display in seconds or cycles.
6. Press [STOP/RESET] to clear and prepare for next test.
7. To test other elements (A-N, B-N, C-N, A-B, B-C, C-A), or zones, simply rotate the [FAULT PHASE]
selector, and repeat at step 2.
3.3.9.5 SWITCH-ONTO-FAULT TEST.
The following procedure determines the operation time of the switch-onto-fault feature of an impedance
relay. This procedure is the same as the timing test, except that the dynamic test is performed with prefault
off:
1. If you haven’t done so, perform steps 1-3 in the Preparation section (3.3.9.1).
2. If you haven’t done so, perform steps 2-5 of the reach test above to find the reach at the theoretical
MTA. To set the impedance to the desired percent of reach for testing, decrease the voltage, or increase
the current.
3. Release the [FAULT] button or [EXTERNAL START] contact input.
4. Turn [PREFAULT] off. Press [STATIC/DYNAMIC] to select dynamic operation mode. Press [FAULT]
to initiate the fault.
5. When the relay operates, the [STOP/RESET] button will illuminate. The relay should trip, indicating
switch-onto-fault (if annunciation is available). Press [TIME] to see the operation time.
6. Press [STOP/RESET] to clear and prepare for next test.
3.3.9.6 CURRENT SUPERVISION TEST.
This test checks the current supervision level of a distance element.
1. Perform steps 1- 4 of the Reach test (Section 3.3.9.2) above.
2. While still holding in the [FAULT] button or shorting the [EXTERNAL START] contact inputs, press
[VOLTAGE], and adjust the voltage to zero. This sets the fault impedance to zero.
3. Press [CURRENT], and adjust the current to zero.
4. Now slowly increase the current. When the relay contacts close, the [TONE] button will light. At this
point, the fault current level is the current supervision level.
5. Release the [FAULT] button, or disconnect [EXTERNAL START] contact input.
6. To test other elements (A-N, B-N, C-N, A-B, B-C, C-A), simply change the fault mode, and repeat at
step 2.