9745 Teleprotection Channel

  • 9745 Teleprotection Channel
9745 Teleprotection Channel

Product Description

RFL® 9745 Teleprotection Channel – Analog or Digital The RFL® 9745, is a fully programmable Teleprotection Channel suitable for Direct Transfer Trip, Permissive Transfer Trip, Blocking and Unblocking applications. Flash memory and remote RS-232 communications allows new firmware to be loaded making field programming possible without having to open the chassis. The communications interface can be converted in the field to adapt to different types of media. An unprecedented level of diagnostic information is available and easily accessible with the RFL® 9745. RFL’s sequence-of-events, diagnostics package provides a convenient method for evaluating communications system performance during the fault clearing process.

Digital Upgrade Kit for RFL® 9745 Protection Equipment

Starting as early as 2015, telephone companies have announced the discontinuance of analog leased lines. If you are currently operating your RFL® 9745 with an audio tone interface, you need a simple path forward. RFL offers complete digital upgrade kits that will allow you to replace your analog interface with a digital interface to 64kbps DDS or T1.

Select Your Upgrade Path

Upgrade to DDS
Upgrade to T1

The value of a simple upgrade solution is clear when considering the operational expense of drawings, engineering, installation, rewiring, and troubleshooting a new system. Upgrade kits install in under 90 minutes, without replacing the existing relays or rewiring the relay connections. The 9745 units do not need to be removed from the rack and CSU/DSU equipment can be preconfigured for a seamless changeover.

Communication Media

  • Can be configured for audio, digital or fiber optic media.

Audio and Digital Versions

  • Up to four independent Functions per audio system
  • Up to Seven per Digital/Fiber system

Event Storage

  • The Sequence of Events Recorder can store up to 100 events. After this limit is reached, older events are overwritten. The Log Counters keep a running tally of the number of times each function, input, output and alarm is active. Up to 1,000,000 counts can be stored for each item.

IRIG-B

  • Accepts the IRIG-B Standard Time Code on a 1 kHz modulated carrier.

Programmability

  • Logic functions, Inputs/Outputs, & any Alarm condition can be changed or fine-tuned remotely/locally through the RFL 9745’s RS-232 port or optional Ethernet/Telnet adapter.

Diagnostic and Testing

  • Diagnostic information is available and easily accessible. RFL’s diagnostic package takes the guesswork out of power system fault during the fault-clearing process.

LAN/WAN Access

  • For applications where a telnet link is required, the RFL 9745 can be equipped with the optional Telnet Module Adapter. This adapter contains one Ethernet port and two RS232 serial ports.

Inputs and Outputs

  • Can be configured with a maximum of two I/O modules which can be any combination of Solid-State, a Relay/Solid-State, and a HS Relay version.

Warranty

  • RFL’s standard warranty for the RFL 9745 is thirty-six months from date of shipment for replacement or repair of any part which fails during normal operation or service.

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Audio Communications

Audio tone versions of the RFL 9745 can be supplied with two or four FSK audio tone transceivers. All transceivers are bidirectional and can be programmed for any operating fre¬quency or bandwidth between 300 and 4,000 Hz. Channel one can be set to operate as a modem channel.

Audio Interface Configurations

  • Single Two-Wire Terminals
  • Dual Two-Wire Terminals
  • Single Four-Wire Terminals
  • Dual Four-Wire Terminals

Recommended Channel Frequencies

  • Range: 300 Hz to 4000 Hz
  • Resolution: 1Hz

Transmit Level

  • Adjustable from -40 dBm +10 dBm in 0.25 dB steps

Receiver Sensitivity

  • Minimum Input Level: -40 dBm
  • Maximum Input Level: 0 dBm

Receiver Dynamic Range (referenced to center point)

  • -17 dB to + 11 dB

Adjacent Channel Rejection

  • 40 dB

60-Hz Rejection

  • A received tone at -30 dBm will not be affected by a 50 Hz or 60 Hz signal as great as 40 Vrms with optional 50/60 Hz blocking filter.

Amplitude Stability

  • The Transmit level will vary by no more than ±1 dB.

Spurious Output

  • All harmonics and spurious outputs are at least 40 dB lower than the carrier.

Transmitter Stability

  • The transmitter frequency is stable within 0.02 percent over the full range of temperature and input power variations.

Trip Boost

  • Amplitude: Adjustable from zero to +12 dB in 1 dB steps.
  • Duration: Adjustable from zero to 30 seconds in .5ms steps.

Input and Output Impedance

  • 600 Ohms

Digital Communications

The RFL 9745 is available with five types of serial digital interfaces: 56Kbps/RS-449, 64Kbps/G.703 Co-directional and Contra-directional interfaces, 64Kbps/X.21, and 2.048Mbps/G.703. The digital interfaces conform to the standards set forth in their respective specifications (RS-449, CCITT G.703, X.21).

Fiber Optic Communications

Fiber Optic Communications Interfaces and System Gains are as follows:

Short Haul Service Unit Fiber Optic Transceivers

Compliant to ANSI C37.94 Short Haul Fiber Standard

Fiber Type:

  • 50 Micron core, 820/850 NM Multimode
  • 62.5 Micron core, 820/850 NM Multimode

Optical Budget:

  • 9db for 50 Micron core
  • 13db for 62.5 Micron core
Fiber Connector: ST

Digital Connector:

  • RS-449, 64kbps, DB37 Male Connector
  • V.35, 64kbps, DB37 Male Connector
  • X.21, 64 Kbps, DB15 Male Connector
  • G.703, 64-768 Kbps, DB15 Male Connector

Input Power

Less than 5W with a 38-150VDC power supply input.

Real Time Clock

IRIG-B

The RFL 9745 accepts the IRIG-B Standard Time Code on a 1kHz modulated carrier. Nominal signal levels are 3.3 volts peak-to-peak (± 0.5v) for a logic “1” and 1 volt peak-to-peak (± 0.2v) for a logic “0”. The IRIG-B input presents a 3.7k ohm impedance and is transformer isolated.

Resolution

1 ms

Accuracy

Free Running: Within 1 minute per month Under IRIG-B Control ±1msecs

Reset

Manual or by IRIG-B code

Isolation

The RFL 9745’s RS-232 ports (front and rear panel) are isolated from circuit common and chassis ground to a surge withstand level of 500 Vdc.

Events Storage

The Sequence of Events Recorder can store up to 100 events. After this limit is reached, older events are overwritten. The Log Counters keep a running tally of the number of times each function, input, output and alarm is active. Up to 1,000,000 counts can be stored for each item.

RS-232 Interrogation Ports

The 9745 provides two RS-232 Ports, located on the front and rear of the chassis. The RS-232 Port located on the front of the chassis has priority. The front of the RS-232 port is configured as a DCE Interface. The rear RS-232 port is configured as a DTE Interface.

Data Rates

300 bps, 1200 bps, 2400 bps, 9600 bps or 19.2 Kbps. Selec¬tion is made using front panel switches.

Communication Parameters:

  • Number of Data Bits: Eight
  • Number of Stop Bits: One
  • Parity: None
  • Flow Control: XON/XOFF

I/O Options

The RFL 9745 can be configured with a maximum of two I/O modules. There is a Solid-State, a Relay/Solid-State, and a HS Relay version available. All versions provide four opti¬cally isolated keying inputs and three independent form “C” alarm output contacts.

Solid-State I/O

Optically Isolated Inputs

Quantity:

  • Four per module

Required Operation Range:

24 Volt Units:

  • 14.6 to 60 Vdc, Nominal Input
  • Current 8.8 mA

48 Volt Units:

  • 31 to 60 Vdc, Nominal Input
  • Current 5.8 mA

125 Volt Units:

  • 75 to 150 Vdc, Nominal Input
  • Current 4.6 mA

250 Volt Units:

  • 155 to 280 Vdc, Nominal Input
  • Current 5.25 mA

Input Current:

  • 10 mA maximum

Minimum Acceptable Pulse Width:

  • 100 micro-seconds

Solid-State Outputs

Quantity:

  • Four per solid-state I/O module

Output Current:

  • Maximum 1 ampere continuous
  • 2 amperes for one minute
  • 10 amperes for 100 msec

Open-Circuit Voltage:

  • 280 Vdc maximum

S/S Pick-up Time:

  • 0 msec

Alarm Relays

Quantity: Three per I/O module

Contact Configurations:

  • SPDT (Form C)

Maximum Output Current:

  • 1 ampere continuous

Maximum Breaking Current:

  • 1 ampere (non-inductive) at 125 Vdc; derated to 0.25 amperes at 280 Vdc

Open Circuit Voltage:

  • 280 Vdc Maximum

Relay/Solid-State I/O

Optically Isolated Inputs

Quantity:

  • Four per module.

Required Operation Range:

24 Volt Units:

  • 14.6 to 60 Vdc, Nominal Input
  • Current 8.8 mA

48 Volt Units:

  • 31 to 60 Vdc, Nominal Input
  • Current 5.8 mA

125 Volt Units:

  • 75 to 150 Vdc, Nominal Input
  • Current 4.6 mA

250 Volt Units:

  • 155 to 280 Vdc, Nominal Input
  • Current 5.25 mA

Input Current:

  • 10 mA maximum

Minimum Acceptable Pulse Width:

  • 100 micro-seconds

Solid-State Outputs

Quantity:

  • One per relay/solid-state I/O Module

Output Current:

  • Maximum 1 ampere continuous
  • 2 amperes for one minute
  • 10 amperes for 100 ms.

48 Volt Units:

  • Open-Circuit Voltage: 150 Vdc maximum

250 Volt Units:

  • Open-Circuit Voltage: 280 Vdc maximum

S/S Pick-up Time:

  • 0 msec

Relay Output

Quantity:

  • Three per module

Contact Configuration:

  • SPST Form A or Form B - Jumper Selectable

Relay Pick-up Time:

  • 7 msec

Output Current Rating:

  • 5 amperes continuous

Surge:

  • 30 amperes for 200 msec

Alarm Relays

Quantity:

  • Three per I/O Module

Contact Configurations:

  • SPDT (Form C)

Maximum Output Current:

  • 1 ampere continuous

Maximum Breaking Current:

  • 1 ampere (non-inductive) at 125 Vdc; derated to 0.25 amperes at 280 Vdc Open-Circuit Volt¬age: 280 Vdc maximum.

HS Relay I/O

Optically Isolated Inputs

Quantity:

  • Four per module

Required Operation Range:

24 Volt Units:

  • 14.6 to 60 Vdc, Nominal Input
  • Current 8.8 mA

48 Volt Units:

  • 31 to 60 Vdc, Nominal Input
  • Current 5.8 mA

125 Volt Units:

  • 75 to 150 Vdc, Nominal Input
  • Current 4.6 mA

250 Volt Units:

  • 155 to 280 Vdc, Nominal Input

Input Current:

  • 10mA maximum

Minimum Acceptable Pulse Width:

  • 100 micro-seconds

Relay Output

Quantity:

  • Four per module

Contact Configuration:

  • SPST Form A or Form B - Jumper Selectable

Relay Pick-up Time:

  • 5 msec

Output Current Rating:

  • 5 amperes continuous

Surge:

  • 30 amperes for 200 msec

Alarm Relays

Quantity:

  • Three per I/O Module

Contact Configurations:

  • SPDT (Form C)

Maximum Output Current:

  • 1 ampere continuous

Maximum Breaking Current:

  • 1 ampere (non-inductive) at 125 Vdc; derated to 0.25 amperes at 280 Vdc

Open-Circuit Voltage:

  • 280 Vdc maximum

Annunciator Chassis

The RFL 9745 can be supplied with an optional one rack unit Annunciator Chassis. This additional chassis is mounted below the standard Three Rack Unit Chassis and provides six programmable solid-state outputs. Each output can be individually programmed to provide specific output an¬nunciation, such as Trip Sent, Trip Received, RS-232 Port Active, etc.

Output Ratings

Maximum Output Current:

  • 1 A continuous

Breaking Current:

  • 100 mA (non-inductive)

Auxiliary Trip Relays

The RFL 9745 can be configured with up to two auxiliary high speed trip relays which are mounted in either the pri¬mary or redundant power supply I/O module. The relays are typically controlled by one of the solid-state function outputs and provide two normally open and one normally closed contact each.

Relay Ratings:

Pick-up Time:

  • 4 msec

Contact Rating:

  • 5 amperes continuous
  • 30 amperes for 200 msec

General Specifications

Displayed Level Accuracy

  • The levels displayed on the front panel and through remote access using PC APRIL will be within 1 dB of the actual values.

Operate Time

  • Audio-Tone Units (average trip times—Dual-Tone System):
  • ± 30 Hz Shift: 26.47 ms
  • ± 42.5 Hz Shift: 20.57 ms
  • ± 60 Hz Shift: 14.78 ms
  • ± 75 Hz Shift: 12.65 ms
  • ± 120 Hz Shift: 11.05 ms
  • ± 150 Hz Shift: 10.12 ms
  • ± 240 Hz Shift: 9.22 ms
  • Digital and Fiber systems: 3 ms maximum in the most secure mode.

Pre-Trip Timer

  • Adjustable in 0.5 ms steps

Trip Hold Timer

  • Adjustable in 0.5 ms steps

Command Extend Timer

  • Adjustable in 0.5 ms steps

Non-Volatile Storage

  • All parameters relating to system operation are stored in electric erasable non-volatile RAM. All parameters related to event logging are stored in battery-backed RAM.

RFI Susceptibility

  • ANSI PC37.90.2 (35 Volts/Meter)
  • IEC 255-22-3 (RFI Class III)

Interface Dielectric Strength

  • All contact inputs, solid-state outputs, power supply inputs and relay outputs meet the following specifications:
  • ANSI C37.90-1989 (Dielectric)
  • ANSI C37.90.1-1989 (SWC and Fast Transient)
  • IEC 255-5 (1500 Vrms Breakdown Voltage and Impulse Withstand)
  • IEC 255-22-1 (SWC Class III)
  • IEC 255-22-2 (ESD Class III)
  • IEC 255-22-4 (Fast-Transient Class III)
  • IEC 834-1

Input Power Requirements (per IEC 834-1)

  • 24 Vdc Supply: 19 to 29 Vdc (1500 mA Typical)
  • 48/125 Vdc Supply: 38 to 150 Vdc (750/325 mA Typi¬cal)
  • 250 Vdc Supply: 170 to 300 Vdc (150 mA Typical)

Power Supply

  • A single or redundant power supply can be provided depend¬ing on the reliability of the application. For example a DTT application for a higher voltage level line may demand the dependability of a redundant power supply.

Temperature

  • Operating: -30° C to +65° C (-22° F to +149° F)
  • Storage: -40° C to +75° C (-40° F to +165° F)

Relative Humidity

  • Up to 95 percent at +40° C (+104° F), non-condensing

Chassis Dimension

  • The RFL 9745 chassis mounts in a standard 19-inch rack or cabinet and is three rack-units high (5.25 inches or 13.3 cm).

Application Examples

850 nm Short Haul Fiber Interface

The RFL 9745 is typically located close to the protective relaying equipment. The communications equipment could be located in a different room or building in the substation. The RFL 9745when configured with the Short Haul Fiber Interface eliminates the ground potential rise and induced voltage concerns associated with routing a copper com¬munications cable between two sites. A pair of 850 nm multimode fiber optic cables are routed between the two locations.

The fibers can be up to 1 kilometer (3,280 feet) long and terminated with ST type connectors.

There are two ways to implement short haul fiber communications between the RFL 9745 and a multiplexer. The Short Haul Fiber Interface for the RFL 9745 is compliant to the ANSI C37.94 Short Haul Fiber Standard and will directly communicate to a multiplexer with a compliant interface. If the multiplexer does not support the standard, RFL can provide a remote Fiber Optic Service Unit that converts the optical signal into an electrical signal that will be accepted by the multiplexer.

The digital output of the Fiber Optic Service Unit is connected to the communications equipment by a short electrical cable as shown in Figure 1. If the communications equipment supports the ANSI 37.94 Short Haul Fiber Interface standard the fiber optic cables can be interfaced directly to it as shown in Figure 2.

Ordering Information

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Available Files

Files Available in the Customer Area

Please visit Operating Manuals or Product/Software Downloads to download relevant files. Requires RFL Customer Account.

Please visit Operating Manuals or Product/Software Downloads to download relevant files. Requires RFL Customer Account.

The following software are available for download in Product/Software Downloads:

RFL 9745 System Software – CPU Module #105025-1 and 107330 only

The downloadable flash software file "S9745R09.MHX" relates to Flash ICs U26 and U27 labeled "CP026", which also relates to "Version 5.2" as reported for "Software ID" PC April screen under the "F" "Configuration and Software Version Display" menu. Instructions for uploading this file can be found in the 9745 Manual section titled "How to Upload a System File From The PC To The RFL 9745", available for download from this web site.

RFL System Software – CPU Module #107335-1 only

The downloadable flash software file "S9745R203.MHX" relates to Flash ICs U26 and U27 labeled "CP026", which also relates to "Version 7.2" as reported for "Software ID" PC April screen under the "F" "Configuration and Software Version Display" menu. Instructions for uploading this file can be found in the 9745 Manual section titled "How to Upload a System File From The PC To The RFL 9745", available for download from this web site.

RFL 9745 PC April Lite for windows V2.1

PC April Lite is a Windows-based program that resolves a problem with PC April when uploading a BAT file from a PC to the RFL 9745 on PCs using Windows 2000, XP, or NT. PC April Lite does not contain an off-line, emulation mode. If both off-line emulation mode and BAT and MHX file transfers are required, please download and use our newest browser-based software package.

RFL PC April for 9745

This is a DOS program which allows the user to simulate a connection with a 9745. This software provides the user with a valuable training tool and allows off-line configuration of the 9745 Teleprotection Channel.

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