OPERATION SUMMARY - Section 3
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 3-45
CU A002 15A
MANTA TEST SYSTEMS
1. Selecting Settings.
Select the major mode settings before setting parameters, such as current, voltage and phase angle.
In general, follow the settings map (Section 3.4) from top to bottom in setting up the instrument.
There are some settings which depend upon previous settings being made correctly (especially ramping
parameters). For each parameter (voltage, current, phase, frequency), there may be a prefault, fault and
postfault setting.
Watch the pushbuttons in the CONTROL section of the front panel to determine the present state (see
Section 4.1).
2. Current Mode.
Always select the desired current mode before adjusting current or phase angle. See Section 4.6 for current
mode selection guide.
3. True Measured Value Display.
The [VALUE DISPLAY] shows true measured values. This means that current must be flowing in a closed
circuit in the load for a value to appear.
Similarly, a current must be flowing to obtain a phase reading when adjusting phase.
4. Fault Mode Selectors and Voltage, Current, Phase Adjustments.
The [FAULT PHASE] and [FAULT TYPE] selectors allow simplified setup for standard faults.
Simply select the fault type and phase, and voltage adjustment will adjust the faulting voltage(s), current
adjustment will adjust the appropriate phase current(s), and phase angle adjustments will adjust the
appropriate phase angle(s).
Always select the desired frequency reference mode and harmonic before making phase adjustments.
5. Use of prefault and fault states.
Be sure to develop the habit of applying fault voltages and currents in the FAULT state (i.e. [FAULT]
button depressed in the static operation mode).
Most users tend to overuse the prefault state for testing. They’re then confused in setting up a dynamic test
involving prefault and fault. Using the fault state allows you to quickly remove high fault currents to
prevent damage to the relay. It also allows you to immediately perform a timing test after the relay’s
operate point is determined.
When testing distance relays, using the fault state for faults will prevent switch-onto-fault trips in normal
testing of distance elements. A user will also find it easier to learn operation with the MTS-1720, in which
prefault and fault current settings and operation is slightly different from operation with the MTS-1710
alone.
