VCL-TP, Teleprotection over IEEE C37.94 (1+1 redundant) Optical Fiber interface
With Trip Counter Display

Description

VCL-TP, Teleprotection over IEEE C37.94 Optical Fiber interface is an extremely reliable and flexible product that is available with 1+1 Optical Link Redundancy (C37.94), 1+1 Power Supply and 8/16, Digital Trip Counter Display Panel with 8 user configurable External Relay Alarm output options.

VCL-TP, Teleprotection Equipment may be used independently, in a standalone point-to-point application, or as an integral extension of the VCL-MX Version 6, E1 Voice and Data Multiplexer solution to provide Teleprotection over SDH or PDH data networks.

VCL-TP, Teleprotection Equipment is extremely reliable and flexible product that offers up to 8, 2-way independent command channels, operated selectively or simultaneously over a wide choice and a variety of transmission interfaces.

Available with:

  • IEEE C37.94 compliant Multi-Mode optical fiber interface for transmission over short-reach multi-mode optical fiber link
  • IEEE C37.94 modulation compliant Single-Mode optical fiber interface for transmission over long-reach, single-mode optical fiber link (≤ 40 KM, ≤ 80 KM, ≤ 120 KM, ≤ 150 KM, ≤ 180 KM), without optical repeaters.

Transmission interface options include:


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.

Performance

  • 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.

Maintenance

  • 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

Reliability

  • 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

Time Clock

  • 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

Applications

Application # 1: Teleprotection over IEEE C37.94 Optical Interface in 1+1 Configuration

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

E1 Teleprotection Equipment

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.


Data Sheet

Data Sheet trip counter