FAULT PLAYBACK - Section 7
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 7-1
CU A002 15A
MANTA TEST SYSTEMS
FAULT PLAYBACK
Complete re-generation of pre-recorded three-phase voltage and a single phase current are possible using
the MTS-1710.
For full three-phase current capability, the MTS-1720 is required, and the system should be set in the I3-
WYE current mode.
7.1 SPECIFICATIONS
Current Amplifier bandwidth:
0 - 10kHz (load dependent)
typical:
10 kHz for 0.1 ohm load
7.5 kHz for 1 ohm load
Voltage Amplifier bandwidth:
0 - 7kHz
Sample rate:
2 - 30 kHz (programmable)
(Accuracy: ±0.2% for rates <10kHz, ±0.6% for rates >10kHz)
Record length:
60,000 samples per phase (600 cycles at 60Hz and 6kHz sample rate)
Resolution:
8 bit d 12 bit scaling, or
14 bit d 16 bit scaling
Output range:
±230.5V peak, voltage outputs
±42.4A peak, current outputs
For greater resolution, speed and length, the external analog input may be used. The only remaining
restriction will be the amplifier bandwidth and output range. This allows an external computer with D/A
capabilities to be connected to the instrument. Provision for external trigger and timing with external analog
input may be accommodated.
7.2 FAULT PLAYBACK MODES
7.2.1 Internal Data Mode
In the internal data mode, the fault data is stored in the internal memory of the MTS-1710. The data can be
“played back” at the appropriate high voltage and current levels upon a start trigger.
Basic operation of a fault playback test involves the following:
•
Setup the MTS-1710 modes for fault playback
•
Download the fault data for the voltage and current signals from an external computer to the
MTS-1710 via the RS-232C interface in an ASCII format.
•
Start recording equipment, if desired
•
Arm the MTS-1710 for fault data output
•
Provide START trigger to start simulation
The maximum record length (in cycles) which can be reconstructed in this mode is given by:
Length [cycles] =
60,000 x line freq [Hz]
sample freq [Hz]