Checking The Teleprotection System With Distance Protection - Siemens SIPROTEC Manual

It is particularly favourable to calculate the mean value from several (3 to 5) successful switching attempts.
Set the calculated time under address 239 as T-CB close (under P.System Data 1). Select the next lower
settable value.
Note
The operating time of the accelerated output relays for command tripping is taken into consideration by the
device itself. The trip command is to be allocated to such a relay. If this is not the case, then add 3 ms to the
measured circuit breaker operating time for achieving a greater response time of the „normal" output relay. If
high-speed relays are used, on the other hand, you must deduct 4 ms from the measured circuit breaker oper-
ating time.
Figure 3-37
3.3.11

Checking the Teleprotection System with Distance Protection

Note
If the device is intended to operate with teleprotection, all devices used for the transmission of the signals must
initially be commissioned according to the corresponding instructions.
The entire paragraph that follows is only relevant for the conventional transmission methods. It is irrelevant for
the use with protection data interfaces.
For the functional check of the signal transmission, the earth fault protection should be disabled, to avoid
signals from this protection influencing the tests: address 3101 FCT EarthFltO/C = OFF.
Check for Pilot Wire Comparison
The operating mode pilot wire comparison differs considerably from other teleprotection systems as far as the
type of transmission (DC closed circuit-loop) is concerned. The examination is described in the following. If a
different transmission scheme is applied, this part can be skipped.
Detailed information on the function of the pilot-wire comparison is available in Subsection 2.7.
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
Measuring the circuit breaker closing time
Mounting and Commissioning
3.3 Commissioning
559