Siemens SWT 3000 Equipment Manual page 172

Installation and Commissioning
3.6 Online Parameter Adjustment
[sclevell-041111-01.tif, 1, en_US]
Figure 3-58
You can set the input level attenuation from 0.0 dBr to -60.0 dBr in steps of 0.1 dB. This value is used for
checking the receive level reserve.
NOTE
i
i
During normal operation, set the input level attenuation to 0.0 dB. This parameter must only be used for
testing during commissioning
Receive Level Setting
When using a PowerLink, straps W1 - W3 on the CLE must be set to give 0 dB at the input of the PU4. Set the
operating thresholds for the receive level alarm and the option of disabling the output in case of an S/N alarm
by clicking on Configuration > Alarms Control.
Table 3-57
Menu Option
Threshold for receiver alarm
Force receiver alarm on S/N
and/or BE alarm
172
Setting the Input Level Attenuation
Measurement:
Function range:
Setting Options for Receiver Alarm
Setting Options
-30 dB / -25 dB / -20 dB / -15
dB / -10 dB
Yes 1)
No
At the input socket of the CLE and PU4
+4 dB to -33 dB at the input of the PU4
Comment
Receive level on the CLE amplified by 0 dB
(W1)
→ effective setting:
-30 dB / -25 dB / -20 dB / -15 dB / -10 dB
Receive level on the CLE amplified by 6 dB
(W2)
→ effective setting:
-36 dB / -31 dB / -26 dB / -21 dB / -16 dB
Receive level on the CLE amplified by 12
dB (W3)
→ effective setting:
-42 dB / -37 dB / -32 dB / -27 dB / -22 dB
Relay receiver alarm is also activated in
case of S/N or BE alarm
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020