• Teleprotection -G.703 Co-Directional Electrical Interface

Teleprotection - G.703 Co-Directional Electrical Interface

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Teleprotection Equipment IEEE C37.94 Optical Interface
Product Overview

VCL-TP, Teleprotection Equipment is an extremely rugged product has been designed to operate reliably even under the most demanding conditions and environment. The VCL-TP, Teleprotection Equipment offers up to 8, 2-way independent command channels which can be operated over a G.703, 64Kbps co-directional digital data link.

VCL-TP, Teleprotection Equipment may be used independently in a point-to-point application between two nodes connected over an optical fiber link, or it may be used as an integrated part of the VCL-MX Version 6, E1 voice and data multiplexer solution over SDH or PDH data networks.

Data Sheet (PDF)

Flyer (PDF)

Teleprotection Application Diagrams

Transmission interface options that are available include:

  • 64Kbps, G.703 co-directional digital data interface option for transmission over 64Kbps data links
  • E1, 2.048Mbps, G.703 interface option for transmission over E1 links.
  • IEEE C37.94 compliant Multi-Mode optical fiber interface for transmission over short-reach multi-mode optical fiber links
  • IEEE C37.94 modulation compliant Single-Mode optical fiber interface for transmission over long-reach, single-mode optical fiber links (≤ 40 KM, ≤ 80 KM,≤ 120 KM, ≤ 150 KM)
  • Option of 1+1 redundant optical path protection / route protection

Features and Highlights

  • Unrivaled Speed, Security and Reliability
  • Use in a Standalone, Point-To-Point Application
  • Use as an integrated part of the VCL-MX V6 E1 Voice and Data Multiplexer solution over an SDH or PDH data network
  • 1+1 Route / Path Protection when used as an integrated part of the VCL-MX V6 E1 Voice and Data Multiplexer solution over an SDH or PDH data network.
  • Compact, standard 19-Inch Rack-mountable, 2U high chassis.
  • Bi-directional Transmission of 8 command Inputs and 8 command outputs
  • Full Duplex Operation
  • Automatic loop test facility
  • User programmable for Direct Tripping, Permissive Tripping and Blocking Protection Schemes
  • Compliant with IEC 60834-1 standards
  • IEEE C37.94 compliant Multi-Mode optical link interface option for short reach optical links
  • IEEE C37.94 compliant (modulation only) Single Mode optical link interface option for long reach optical links  (≤ 40 KM, ≤ 80 KM, ≤ 120 KM)
  • 64Kbps, G.703 co-directional interface option for transmission over 4-wire electrical links
  • 2.048Mbps, G.703 interface option for transmission over 4-wire electrical links
  • Available in 24V DC, 48V DC, 110V DC, 220V DC and 250V DC configurations.
  • Available with G.703 64Kbps, 4-Wire co-directional interface::
    • 8 Command Teleprotection Terminal 
    • (8 Nos. Tx & Rx independent command inputs & outputs for providing interconnection with Power Protection Relays).
      G.703 64Kbps, 4-Wire co-directional interface.
      Available power options: -24V DC, 48V DC, 110V DC, 220V DC and 250V DC.

    Flexibility and User Programmability

    • User programmable command holding delay for error resistant command inputs
    • User programmable command sampling rate for error resistant command transmission
    • Less than 2ms command transfer time
    • Less than 5ms relay operating time
    • Less than 7ms back-to-back operating time (including relay operating time) in IEEE C37.94 Optical mode
    • Less than 7ms back-to-back operating time (including relay operating time) in 2.048Mbps, G.703, E1 interface mode
    • Less than 11ms back-to-back operating time (including relay operating time) in 64 kbps, G.703 Co-directional 4 wire data interface mode
    Technical Specifications

    Event and Alarm Logging

    • Time-Stamped Alarm Logging
    • Time-Stamped Event Logging.

    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
    • Telnet - Remote access over IP links
    • Web Interface
    • 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
    • Automatic Link Test feature – link testing at user programmable periodical intervals
    • Visual I/O status – LED Display.
    • Dry contact external alarm relay to connect an external alarm on an annunciator panel, which can be wired up for either NO or NC condition.

    Reliability

    • Advanced Communication Protocols to ensure reliable transmission of commands
    • Power Supply Immunity to withstand impulse surges and transients of upto 10,000 Volts
    • High Quality Relays – withstands voltage 10 kV between coil and contacts (1.2 × 50 μþs)
    • Maximum Switching Voltage: 400 V AC or 300 V DC
    • Optoisolated Command Inputs
    • Optoisolated Relay Outputs
    • Relays - Mechanical: 10,000,000 operations min. (at 18,000 operations/hour).

    Error Detection and Coding

    • Line Code Violation Detection
    • LOS Detection
    • Block Command Encoding as per C.37.94.

    Application Diagram

    Teleprotection - 64kbit/s G.703 co-directional data channel over SDH / PDH Network

    Teleprotection - 64kbit/s G.703 co-directional data channel over SDH / PDH Network

    Figure # 1 – Typical Application over a 64Kbps G.703 co-directional data channel as an integrated part of the VCL-MX Version 6 - E1 Voice and Data Multiplexer solution over an SDH or PDH data network


    Typical Application over an IEEE C37.94 compliant optical link

    Typical Application over an IEEE C37.94 compliant optical link

    Figure # 2 – 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.