Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
562
Checking with Permissive Underreach Transfer Trip
Prerequisites: Teleprot. Dist. is configured in address 121 to a permissive underreach transfer trip
scheme, i.e. PUTT (Z1B) or PUTT (Pickup). Furthermore, FCT Telep. Dis. is switched ON in address
2101. Naturally the corresponding send and receive signals must also be assigned to the corresponding binary
output and input.
Detailed information on the function of the permissive underreach transfer trip is available in Section 2.7. Com-
munication between the line ends is necessary.
On the transmitting end, a fault in zone Z1 must be simulated. This may be done with secondary injection test
equipment.
Subsequently, on the receiving end, when using PUTT (Z1B) a fault inside Z1B, but outside Z1 is simulated,
when using PUTT (Pickup) any fault is simulated. Tripping takes place immediately, (or in T1B), without
signal transmission only in a higher distance stage. In case of direct transfer trip, an immediate trip is always
executed at the receiving end.
In case of a phase-segregated transmission the above-mentioned checks are carried out for each phase. The
correct phase allocation is also to be checked.
This test must be performed at both line ends, on a three terminal line at each line end for each transmission
path. However, please finally observe the last margin heading „Important for all schemes“!
Important for all Schemes
If the earth fault protection was disabled for the signal transmission tests, it may be re-enabled now. If setting
parameters were changed for the test (e.g. mode of the echo function or timers for unambiguous observation
of sequences), these must now be re-set to the prescribed values.
3.3.12 Testing of the Teleprotection System with Earth-fault Protection
This section is only relevant if the device is connected to an earthed system and earth fault protection is applied.
The device must therefore be provided with the earth fault detection function according to its ordering code
(16th MLFB position = 4 or 5 or 6 or 7). Which group of characteristics is to be available is determined during
device configuration to Earth Fault O/C (address 131). Furthermore, the teleprotection must be used for
the earth fault protection (address 132 Teleprot. E/F configured to one of the possible methods). If none
of this is the case, this section is not relevant.
If the signal transmission path for the earth fault protection is the same path that was already tested in conjunc-
tion with the distance protection according to the previous Section, then this Section is of no consequence and
may be skipped.
For the functional check of the earth fault protection signal transmission, the distance protection should be dis-
abled, to avoid interference of the tests by signals from the distance protection: address 1501 FCT Distance
= OFF.
Checking with Permissive Schemes
Requirements: Teleprot. E/F is configured in address 132 to one of the comparison schemes using per-
missive signal, i.e. Dir.Comp.Pickup or UNBLOCKING; in addition, at address 3201 FCT Telep. E/F ON
is switched. The corresponding send and receive signals must be assigned to the corresponding binary output
and input. For the echo function, the echo signal must be separately assigned to the transmit output.
Detailed information on the function of the permissive scheme is given in Section 2.9.
To Next Page
Loading...
Need help?
General
