ABB ETL600 User Manual

ABB Switzerland Ltd 1KHW001489-EN ETL600
ETL: useful AF bandwidth
2120 Hz
2320 Hz
2520 Hz
3840 Hz
Speech 2200 Hz
Speech 2000 Hz
Speech 2400 Hz
3600 Hz
Teleoperation Ch.
Teleoperation Ch.
Teleop. Ch.
Speech 3400 Hz
Pilot
NSD600 Guardfilter
Pilot
Pilot
Pilot
Fig. 3-40 Examples for allocation of the 4 kHz band with speech
and the ETL600 pilot as NSD600 guard signal
ETL: useful AF bandwidth
2480 Hz
2680 Hz
2880 Hz
3840 Hz
Speech 2200 Hz
Speech 2000 Hz
Speech 2400 Hz
3720 Hz
Teleoperation Ch.
Teleop. Ch.
Teleop. Ch.
Speech 3400 Hz
Pilot
Guard
Guard
Guard
Pilot
Pilot
Pilot
Fig. 3-41 Examples for allocation of the 4 kHz band with speech
and an own NSD600 guard signal
If two TPE are configured, one in the APLC and one in the DPLC
channel, a band of 500 Hz is always reserved in the DPLC channel for
the guard of TPE2. The trip frequencies of TPE2 are located in the
DPLC channel just like in a standard APLC channel of 4 kHz (at the
upper or at the lower end of the DPLC channel, depending whether it
is configured as “erected” or “inverted”; refer to section 3.1.1 for
details).
3.6.8.4. Command signals
3.6.8.4.1. Dual-tone principle
Protection commands are transmitted by the NSD600 using “dual
tone” tripping signals, i.e. two (tripping) frequencies simultaneously
sent - each having half the amplitude of a corresponding single tone
3-74 November 2005 Structure and Function

ABB ETL600 Specifications

General

Brand	ABB
Model	ETL600
Category	Touch terminals
Language	English