Features and Highlights
- Compact, standard 19-Inch Rack-mountable, 2U high chassis
- 1+1 Route / Path Protection for C37.94 Optical interface with less than 6ms link recovery in a point-to-point protected link
- Distance Teleprotection applications
- User programmable for Direct Tripping, Permissive Tripping and Blocking Protection Schemes
- Compliant with IEC 60834-1 and IEC 834-1 specifications and standards for reliability
- Optical Interface fully compliant with IEEE C37.94 for error resistant transmission
- Use in a Standalone, Point-To-Point application
- Use as an integrated part of the VCL-MX Version 6 E1 Voice & Data Multiplexer solution over an SDH or PDH data network
- Bi-directional Transmission of 8 command Inputs and 8 command outputs
- IRIG-B / NTP Time Synchronization
- Available with Trip Digital Display Counters (8/16) with 8 user configurable External Relay Alarm outputs
- Full Duplex Operation
- Available with 48V DC, 110V DC, 220V DC and 250V DC command and switching voltage options
- Option of 1+1, Redundant Power Supply
- Available with 48V DC, 110V DC, 220V DC and 250V DC power supply options
- Immunity to Voltage Dips, Short Power Supply Interruptions and Voltage Variations as per IEC 61000-4-11 specifications.
- Less than 2ms command transfer time
- Less than 4ms relay operating time
- Less than 6ms back-to-back operating time (including relay operating time) in IEEE C37.94 Optical mode
Flexibility and User Programmability
- User programmable parameters for "Input" command sampling time and "Output" command holding time:
- Input Sampling Time - Sets the "Sampling Time" of the INPUT Commands.
- Output Holding Time - Sets the "Holding Time" of the OUTPUT Commands.
- Manual Loop Test – This feature initiates a "Manual Loop-Test" of the transmission link that interconnects the "Local" Teleprotection Terminal and the "Remote" Teleprotection Terminal.
- Automatic Loop Test – The Automatic Link Test feature automatically initiates "Periodic Loop Tests" at user programmed intervals of the transmission link that interconnects the "Local" Teleprotection Terminal and the "Remote" Teleprotection Terminal.
- Delay Measurement – This feature automatically initiates an end-to-end "Delay Measurement Test" between the "Local" and the "Remote" Teleprotection Terminal through the interconnecting transmission link.
Event and Alarm Logging
- Time-Stamped Alarm Logging
- Time-Stamped Event Logging.
- IRIG-B time / NTP synchronization option to synchronize time-stamps with GPS.
Management and Monitoring
- RS232 serial, USB serial interfaces for local terminal access
- 10/100BaseT Ethernet Interface for remote access over an IP network
- Encrypted Password Protection
- Maintains an access log of over 10,000 most recent entries for security audit
- Telnet - Remote access over IP links
- SSH - Secured remote access using "Secure Shell Protocol" over IP links
- SNMP Traps and NMS for real time remote monitoring and management over an IP network
- 8, Dry contact external alarm relay to connect external alarms on an annunciator panel to extend audio and / or visual alarms - Optional
- 8/16 Trip Counter Displays – Optional
- Power Supply Immunity to withstand impulse surges and transients of up to 4kV,/ High Quality Relays – withstands voltage 10 kV between coil and contacts (1.2 × 50 μþs). Fully compliant with IEC 255 specifications
- Maximum Switched Relay Voltage and Current: 400V AC or 300V DC; 5 Amps continuous
- Minimum Relay Operations: 10,000,000 operations at 18,000 operations/hour)
- Optoisolated Command Inputs
- Optoisolated Relay Outputs.
Error Detection and Coding
- Line Code Violation Detection
- LOS Detection
- Block Command Encoding as per IEEE C37.94 for reliable transmission
- Built-in real time clock (RTC) with 10 year battery backup for event and alarm time-stamping.
- Synchronization with an external IRIG-B Input from GPS
Application # 1: Teleprotection over IEEE C37.94 Optical Interface in 1+1 Configuration
Figure # 1 – Typical Application over a IEEE C37.94 compliant optical link, as an integrated part of the
VCL-MX Version 6 - E1 Voice and Data Multiplexer solution over an SDH or PDH data network.
Application # 2: Teleprotection over IEEE C37.94 Optical Interface
Figure # 2 – Typical Point-To-Point Application Application # 3:
Typical Application over an IEEE C37.94 compliant optical link
Figure # 3 – Typical Application over an IEEE C37.94 compliant optical link, as an integrated
part of the E1 PDH Voice & Data Multiplexer solution over an SDH or PDH data network.