This document provides technical specifications for the ABB ETL600 Rel.2 teleprotection system, including: - It can transmit up to 4 independent protection commands using 3.2 kHz or 4 kHz channels, plus a test command. - Commands can be configured for blocking, permissive, or direct tripping functions. - It provides high security against unwanted tripping and high dependability for intended tripping, with transmission times below 30 milliseconds under various channel conditions. - The user interface software runs on a PC and allows for commissioning, testing, spectrum analysis, and remote management of a network of up to 65,000 terminals.

1. Technical Data ETL600 Rel.2 ABB Switzerland Ltd
TELEPROTECTION (NSD600)
Application Transmission of protection commands for line- and objects protection
Number of units 1 or 2 integrated NSD600
Number of commands for each NSD600 in 3.2 kHz or 4 kHz APLC channels:
4 independent commands A, B, C, D, simultaneously transmitted,
individually configurable for blocking, permissive or direct tripping,
plus 1 test command T per NSD600.
Single purpose teleprotection NSD600 in the 2 kHz APLC channel
(not available for ETL600 Rel.1.0):
3 independent commands A, B, C, simultaneously transmitted,
individually configurable for blocking, permissive or direct tripping,
1 prioritized command D for direct tripping, overriding A, B, C,
plus 1 test command T.
Command duration Command suppression after 1 to 60 s, programmable in steps of 1 s
(individual for each command), with alarm (back to guard state);
Single purpose teleprotection NSD600 in the 2 kHz APLC channel
(not available for ETL600 Rel.1.0):
Unlimited (command suppression may be disabled individual for each command),
with timed Tx output power reduction to pre-defined value after 1 to 60 s,
programmable in steps of 1 s (common for all commands).
Unblocking output Unblocking output contact closes for a predefined time (e.g. 200 ms) upon
loss of Rx-signal (no trip and no guard)
Secure against Noise (continuous or impulsive), speech and sweep tones,
DTMF (CCITT 48430 or ITU-T Q.23) in-band signaling
Bandwidth requirement Nil; command signal transmission in-band (alternate purpose, with signal boosting)
Guard signal ETL-pilot signal, or own guard signal above speech band 2000, 2200 or 2400 Hz
Processing of received signal Adaptive (to prevailing channel condition, always ensuring shortest transmission times)
Number and type of inputs 4 optocoupler per Teleprotection Interface G4AI
Method of tripping Contact and battery, or dry contact
Voltage ranges 24 to 250 VDC, selectable in 4 ranges
Number and type of outputs 4 solid state relays and 2 mechanical relay contacts per Teleprotection Interface G4AI
Tripping voltage 5 to 250 VDC nominal
Tripping current ≤ 1 A carry / 2 A peak solid state
5 A carry / 20 A peak mechanical relay
HMI configurable Command and alarm assignments to I/O ports,
Command pick-up times, hold times, duration monitoring,
State of command outputs during link alarm,
Alarm and unblocking levels thresholds.
Test facilities Manual or periodic loop test every 1, 3, 6, 12, 24 hours
Event logging 2’600 time-stamped command events, command counters; stored in non-volatile memory
Clock synchronizing input for IRIG-B available
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2. Technical Data ETL600 Rel.2 ABB Switzerland Ltd
Teleprotection performance
NSD600 in 3.2 kHz or 4 kHz APLC channels:
Performance criteria, description of measurement Abbrev. Blocking Permissive tripping Direct tripping
Nominal transmission time (back-to-back operation,
including PLC equipment delay and operating times of
the teleprotection interface I/Os; noise free channel)
T0
1)
≤ 10 ms
2)
≤ 11 ms
.
≤ 12 ms
.
Security - probability of an unwanted command
(200 ms noise, 200 ms pause, worst case SNR)
Puc < 1E-04 < 1E-06 < 1E-09
Dependability - probability of missing a command Pmc < 1E-03 < 1E-03 < 1E-04
required channel condition SNR 6 dB / 5 dB 6 dB / 4 dB 6 dB / 4 dB
for maximum actual transmission time Tac
1)
14 ms / 15 ms 17 ms / 20 ms 22 ms / 26 ms
1)
Valid for the solid state command outputs, add 5…8 ms for the relay contact command outputs.
2)
With own NSD600 guard. Add 1 ms for ETL600 pilot with frequency > 3600 Hz as guard signal.
NSD600 in DPLC channel:
Performance criteria, description of measurement Abbrev. Blocking Permissive tripping Direct tripping
Nominal transmission time (back-to-back operation,
including PLC equipment delay and operating times of
the teleprotection interface I/Os; noise free channel)
T0
1)
≤ 11 ms ≤ 12 ms
.
≤ 13 ms
.
Security - probability of an unwanted command
(200 ms noise, 200 ms pause, worst case SNR)
Puc < 1E-03 < 1E-06 < 1E-09
Dependability - probability of missing a command Pmc < 1E-03 < 1E-03 < 1E-04
required channel condition SNR 6 dB 6 dB 6 dB
for maximum actual transmission time Tac
1)
15 ms 17 ms 22 ms
1)
Valid for the solid state command outputs, add 5…8 ms for the relay contact command outputs.
NSD600 in 2 kHz APLC channel (not available for ETL600 Rel.1.0):
Performance criteria, description of measurement Abbrev. Blocking Permissive tripping Direct tripping
Nominal transmission time (back-to-back operation,
including PLC equipment delay and operating times of
the teleprotection interface I/Os; noise free channel)
T0
1)
≤ 11 ms ≤ 12 ms ≤ 14 ms
Security - probability of an unwanted command
(200 ms noise, 200 ms pause, worst case SNR)
Puc < 1E-03 < 1E-06 < 1E-09
Dependability - probability of missing a command Pmc < 1E-03 < 1E-03 < 1E-04
required channel condition SNR 6 dB 6 dB 6 dB
for maximum actual transmission time Tac
1)
17 ms 19 ms 30 ms
1)
Valid for the solid state command outputs, add 5…8 ms for the relay contact command outputs.
USER INTERFACE PROGRAM (HMI600)
Hardware and OS requirements PC with Windows 2000 or Windows XP
Port for connection of service PC RS-232 / 9’600, 19’200, 57’600 bps
USB with optional interface converter
Ethernet with optional, PC based server application
Integrated testing aids
Channel equalization Automatic, with graphical display of channel amplitude response
Spectrum analyzer for graphical display of signal spectra in AF channels
Auxiliary signals generation for tuning, testing and commissioning
Element management Address range for up to 65’000 terminals
Alarm polling facility for all terminals in the network, via EOC
Firmware download and equipment settings local and remotely via Embedded Operation
Channel (EOC)
Support of mixed ETL500 / ETL600 networks
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