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TTMX Teleprotection Terminal
Fast and Secure Teleprotection for Transmission Protecting your critical assets after a fault is crucial to maintaining power system stability and safety. Existing technologies are becoming harder to implement with telephone companies suspending their connection leases. What’s need is a standards-based communications solution that is simple to implement, provides fault protection in harsh operating conditions and provides the reliability needed to address teleprotection, including Direct Transfer Trip, Permissive Transfer Trip, blocking and unblocking applications. What is TTMX? TTMX Is a Universal Teleprotection Terminal (TT) Multiplexer (MX) for critical and time sensitive inter-substation communications
Additionally, the TTMX provides communication monitoring & management. This allows an operator to assess essential parameters like trips, device health, status of the link, settings, and alarms from a remote location. TTMX Benefits
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The TTMX platform offers 15 shelf slots with capability of adding optional expansion chassis. Compact digital access controllers offer four E1 interfaces to support fiber-optic or copper connections when connected to a higher-order transport system (microwave/SDH/MPLS).
TTMX offers a whole spectrum of modular options flexibly added to base platform. The solution is powered through 48/130 vDC station batteries with a bank of modular and hot-swappable interface units, available in the following options:
Base Teleprotection platform
Channel Options
NMS & Security Options
Typical Configurations
P2P Configuration – Direct Fiber Interface
Simplest configuration—point-to-point over a dedicated fiber connection.
P2P Configuration – Established Link
With a high capacity point-to-point established link, such as a Multiplexer or Microwave, you can connect the TTMX to standard interfaces.
P2P Configuration – Transport Media Redundancy
With two transport media options available, the TTMX can provide a redundant solution.
P2P Configuration – Multi-terminal
Add/Drop flexibility provides point-to-point connectivity between any two sites on the network.
What is the CDAX ?
CDAX is the E1 interface card on the Lentronics Teleprotection platform, operating as a Compact Digital Access X-connect (CDAX)
Supports configurable drop-port modes
Integrated 64 kbps level cross connect
Direct Transfer Trip (DTT) Unit
B86441-42 DTT-Tx/Rx UNIT
Transmit Functions
Receive Functions
DTT signals connected to the relay can be tested by a dedicated test panel (B86429) which allows complete end-to-end testing without disconnecting the protection relays.
B86466 DATA-G703 Unit
B86464 DATA-NX64F Unit
B86464 DATA - NX64 Unit
86448 DATA-LS Unit
B86445-32 2W VF FXS UNIT (2-Channel)
B86445-42 2W VF FXO UNIT (4-Channel)
B86444 -08/-28 4W VF UNIT (1 or 4-Channel)
VistaNET™ EMS for GE Multiplexers
NMX Unit
NMX units enables Ethernet-based connectivity for Network Management traffic between VistaNET and the TTMX hardware. The NMX unit can be optionally additionally secured through a TLS-based encryption module.
Ethernet connectivity for NMS
Redundancy
Optional redundant NMX unit at an alternate location is possible. VistaNET monitors and controls the network through both the nodes and chooses primary / back-up dynamically.
Specifications
| E1 Interfaces | |
|---|---|
| Line Rate | 2.048 Mb/s ± 50 ppm |
| Line Code Options | HDB3 and AMI |
| Framing Format | CRC multi-frame |
| Signaling multi-frame (CAS) | |
| Per ITU-T G.704 | |
| PRBS Generator | 211-1, 215-1 |
| Pulse Shape | ITU-T G.703 compliant |
| Nominal Line Impedance | 120 Ω balanced ± 5% resistive |
| Connectors | RJ-48C for electrical E1 (balanced) |
| SFP cages for optical E1 | |
| 3-pin header for both major and minor shelf alarm contact outputs | |
| 3-pin header for shelf power supply(s) alarm contact input | |
| Teleprotection Interfaces | |
| Transfer Trip | Separate transmit and receive units |
| Nx64 kb/s Data Optical | N=1 to 12 64kb/s channels |
| IEEE C.37.94 standard for fiber optical connection to protection relays | |
| G.703 Data | 64 kb/s channel supporting co-directional timing and Form-C relay alarm output |
| Environmental | |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Storage Temperature | -40°C to +70°C (-40°F to +158°F) |
| Humidity | 5-95% non-condensing |
| Earthquake | Earthquake Risk Zone-4 shock and vibration |
| Environmental – Electric Power Substation | |
| EMI/RFI | Designed to meet ANSI/IEEE C37.90.2 RFI |
| SWC/ISOLATION | Designed to meet ANSI/IEEE C37.90.1 SWC |
| Physical Data | |
| Height | 133 mm (5.25 inches) |
| Width | 483 mm (19 inches) |
| Depth | 413 mm (16.25 inches) |
| Weight | Dependent upon configuration |
| Optional Interfaces | |
| DATA INTERFACES | |
| Low Speed Data | RS232 interface |
| Sub-rate multiplexing | |
| Point-to-point and multi-point | |
| Synchronous and asynchronous | |
| High Speed Data | 64 (56) kb/s rates |
| RS422, V.35, G.703 and OCUDP interfaces | |
| Nx64 kb/s Data Electrical | N = 1 to 12 64 kb/s channels |
| TELEMETRY INTERFACES | |
| Contact Input/Output | Transport of contact closure |
| VOICE INTERFACES | |
| 4W VF | Optional E&M signaling |
| Point-to-point and multi-point | |
| 2W VF | Optional E&M signaling |
| 2W Foreign Exchange | Loop, ground or PLAR signaling |
| System Alarms | |
| Major | Form-C alarm relay (singular) |
| Minor | Form-C alarm relay (singular) |
| Power | |
| 48 VDC or 130 VDC | |
| Optional redundant power supply units | |
| Certifications | |
| IEC 60834-1 Teleprotection Performance | |
| Network Management | |
| VistaNET, operating on MS-Windows based PCs, allows network access via E1 or SDH Multiplexer nodes for system monitoring and diagnostics | |
| Alarm logging and time stamping | |
| Simple troubleshooting and network maintenance | |
| RS-232 serial and IP LAN access, as well as SNMP software license choices | |
