Doc. SIE62153
Rev. 1
Page 13/24
. Measurement of the time delay from parameters step change;
. Search of the threshold, slewing parameters and memorize the value at the instant of the tripping
of the input;
. Step change of parameters during a fixed time, reporting inputs that have changed their state
(pause).
- Tests are executed in the following way:
. The PC defines the parameters to inject or vary;
. At the command of the operator, parameters are transmitted to DRTS.3 PLUS by the serial
interface;
. DRTS.3 PLUS generates the specified values, waits for the trip of the selected input contacts, and
then transmits the results to the PC by the same serial interface;
. The PC examines the results, performs calculations and then displays them to the operator.
- During the execution of the test DRTS.3 PLUS is self controlled and does not depend on the serial
communication.
- The simulation of the fault can be made of single or multiple tests (case of evolving failures).
- Between two simulations parameters may return to zero, return to the healthy value or maintain
the last injected value.
- Maximum number of elementary tests (cycles) in a multiple test: 49.
- Duration of the cycle: from 1 ms to 999999.9999 s;
- Accuracy of the cycle duration: 0.2 ms.
- Delay between two cycles: 1 ms maximum.
3.13 Transient files reproduction
- Possibility to reproduce a fault that has been recorded with a COMTRADE format, by means of
the software R-PRO.
- Maximum recording dimension: 16 word; 64 kWord per channel; maximum sampling frequency
50 kHz.
- Transient files bandwidth: 0 to 5 kHz.
3.14 Protections
- Fuse on the mains supply.
- Electronic protections on the internal DC supplies of the instrument and alert to the program.
- Electronic protection for overload on the current (open circuit) or voltage outputs (short circuit),
with immediate release of the output and lighting of the alarm light. The program resets the fault
condition.
