1、Date Code 20060721 Instruction Manual SEL-2595 Teleprotection Terminal SEL-2595 Teleprotection TerminalInstruction ManualFeatures, Benefits, and ApplicationsThe SEL-2595 is a two-rack unit teleprotection terminal that has eight contact inputs and eight contact outputs. The status of these inputs and
2、 outputs is communicated between SEL-2595 terminals using IEEE C37.94 compliant fiber-optic channels. The high operating speed, high security against misoperation caused by noise, and high dependability in the presence of noise of the SEL-2595 terminal make this product an ideal teleprotection devic
3、e. Simple Pilot Protection improves existing or new installations. Add low-cost pilot communications to existing line protection applications. Compact Rack Mount reduces installation to a two-rack unit chassis. Self-Testing increases reliability of auxiliary relay functions. Simple Diagnostics consi
4、st of 22 LEDs that indicate contact input, output, channel, and device status. Fiber Optics and Channel Monitoring increase scheme security and provide freedom from interference. User Configurable Labels allow clear indication of system function and status. Fast Operating Speed compares with high-sp
5、eed teleprotection equipment. ConnectorizedTerminal Blocks offer ease of service. Increased Safety results from fiber-optic isolation and location of all electrical connections behind the panel.SEL-2595 Teleprotection Terminal Instruction Manual Date Code 20060721Product Overview2Product OverviewFig
6、ure 1 shows the functional overview of the SEL-2595.The SEL-2595 is an excellent teleprotection device and a simple way of expanding the number of I/O points available in a system of relays. It is superior to hard-wiring relays together through electromechanical or static auxiliary relays, because y
7、ou can now monitor the performance of the communications channel. In addition, its self-testing ability ensures prompt notification of any device or communications channel problem.Figure 1 SEL-2595 Functional OverviewFigure 2 Serial Label (a), Compliance Label (b), and Patent Label (c)Compliance Lab
8、el LocationLevel-sensitive contactinputs do not assert duringdc grounds when applied tocenter-grounded systems.Wide-range powersupply consumesless than 5 watts.All terminals areclearly numbered.Connectorized screwterminals accept ring lugswith wires up to #10 AWG.Each output contacthas both a and bc
9、ontacts for flexibility.Output contacts are ratedfor trip and close duty.Alarm contacts signalself-test and commun-ications channel status.Input and output LED labelsare user configurable.LEDs indicate input andoutput status, channelactivity, device status,and communicationschannel health.Rugged and
10、 compacttwo-rack unit enclosurewithstands EMI, RFI,shock, and vibration.i3881c(a) (b) (c)Date Code 20060721 Instruction Manual SEL-2595 Teleprotection TerminalApplications3ApplicationsProtectionHigh-speed protective relay systems rely on teleprotection equipment to send and receive transfer tripping
11、 commands between substations. Modern utility grade digital multiplexers include teleprotection channel cards that provide this function using one or more of the multiplexer time slots. Often the multiplexer is collocated with the communications equipment in the substation, however, the communicatio
12、ns equipment and protective relays can be physically located in separate buildings. The physical equipment separation requires long control cable runs between devices, increasing susceptibility to problems associated with metallic control wiring. The SEL-2595 provides a contact interface between the
13、 protective relay and IEEE C37.94 compliant multiplexer equipment via a short-haul fiber interface.Figure 3 The SEL-2595 Is a Low-Cost Teleprotection Systemfor Use With IEEE C37.94 Compliant Digital MultiplexersSCADAUse the SEL-2595 to extend the reach of SCADA Remote Terminal Units (RTU). Communica
14、te control and alarm points between remote circuit breakers/circuit switchers and RTUs via the SEL-2595.Figure 4 Use the SEL-2595 to Extend RTU Status and Control to Other LocationsFiber-Optic MuxSEL-2595RelayFiber-Optic MuxSEL-2595RelayRelay BuildingRelay RoomCommunications BuildingFiber CableFiber
15、 CableCommunications RoomDigital MultiplexerSEL-2595SCADA RTUSEL-2595Digital MultiplexerDigital CommunicationsNetworkControl signals to/from the remote deviceSEL-2595 Teleprotection Terminal Instruction Manual Date Code 20060721Functional Description4Functional DescriptionFigure 5 SEL-2595 Functiona
16、l Block DiagramTransmit SectionThe contact input information is passed through an input encoder, where the contact status is encoded into a 64-kilobit-per-second data packet. This “payload” packet includes the status bits for the eight contact inputs, error detection bits, contact output framing bit
17、s, and transmit address bits per switch setting 14. The completed transmit payload packet is sent to the C37.94 framer section. The C37.94 framer section formats the payload data into a transport frame that is used between the SEL-2595 and the multiplexer channel card. This frame is transmitted at 2
18、.048 megabits per second and includes header and overhead bits, per IEEE Standard C37.94.Figure 6 Frame StructureThe MultiplexerThe transport frame is stripped off at the multiplexer channel card and the payload data is included as a DS0 channel in the multiplexer payload. At the remote multiplexer,
19、 the DS0 data is decoded and inserted into a new transport C37.94 frame and sent to the remote SEL-2595.Receive SectionThe SEL-2595 receives a data frame from the multiplexer channel card. In the framer section the payload data are separated from the transport frame and sent to the output decoder se
20、ction. The RX LED lights if the C37.94 transport frame is valid. In the output decoder, error detection bits are checked. If errors are detected, the DATA LED extinguishes, the contact outputs de-energize, and the packet is discarded. If the error detection check passes, the address information is d
21、ecoded and compared to the receive address setting on switches 58. If the address is different than expected, the DATA LED extinguishes and the output contacts de-energize.Contact InputsContact OutputsOutputDecoderInputEncoderC37.94FramerTX RXLEDsLEDsLEDsto MultiplexerHeader Overhead PayloadC37.94 F
22、rameTransport Frame SEL-2595 DataDate Code 20060721 Instruction Manual SEL-2595 Teleprotection TerminalInstallation and Maintenance5Installation and MaintenanceFiber-Optic PortThe SEL-2595 uses a fiber-optic transmitter. When working with this device, observe the following safety precautions: Do not
23、 look into the fiber (laser) ports/connectors. Do not look into the end of an optical cable connected to an optical output. Do not perform any procedures or adjustments that this instruction manual does not describe. During installation, maintenance, or testing of the optical ports, use only test eq
24、uipment qualified for Class 1 laser products. Incorporated components, such as transceivers and laser emitters, are not user serviceable. Return units to SEL for repair or replacement.Rear-Panel SymbolsThere are important safety symbols on the rear of the SEL-2595 as shown in Figure 7.Observe proper
25、 safety precautions when you connect the SEL-2595 at terminals marked by these symbols. In particular, the danger symbol located on the rear panel corresponds to the following:Contact with instrument terminals may cause electrical shock which can result in injury or death.Be careful to limit access
26、to these terminals.Figure 7 Rear-Panel Safety SymbolsPower SupplyYou can order the SEL-2595 with one of two power supply voltages listed in the Specifications on page 15. The serial number label on the back of the device lists the power supply voltage. The SEL-2595 power supply ceases operation when
27、 the input voltage is too low to maintain reliable operation, and all output contacts return to the deasserted state. Applying the rated input voltage returns the SEL-2595 to proper operation.Use 16 AWG (1.5 mm2) wire (or heavier) to connect to the POWER terminals, shown in Figure 8. When you use a
28、dc power source, you must connect the source with the proper polarity, as indicated by the + (Terminal 47) and (Terminal 48) symbols on the power terminals. Upon connecting power, you will see the ENABLED LED illuminate.Danger Symbol GroundingTerminalSymbol!DANGER: Contact with instrument terminals
29、may cause electrical shock which can result in injury or death.SEL-2595 Teleprotection Terminal Instruction Manual Date Code 20060721Installation and Maintenance6fFigure 8 SEL-2595 Rear-Panel Power and Ground ConnectionsDisconnect DeviceFor installations requiring CE compliance, place an external ci
30、rcuit breaker no more than 3.0 m (9.8 feet) from the equipment. The circuit breaker must comply with IEC 60947-1 and IEC 60947-3 or an equivalent approved disconnect device appropriate for the country of installation and be identified as the disconnect device for this equipment.The maximum current r
31、ating for the power disconnect circuit breaker or overcurrent device must be 20 A. Be sure to locate this device within 3.0 m (9.8 feet) of the SEL-2595. Operational power is internally fused. This fuse is not user replaceable. Should failure occur, return the unit to the factory for repair.Screw Te
32、rminal ConnectorsTerminate connections to the SEL-2595 screw terminal connectors with ring-type crimp lugs. Use a #8 ring lug with a maximum width of 9.1 mm (0.360 in.). The screws in the rear-panel screw terminal connectors are #8-32 binding head, slotted, nickel-plated brass screws. Tightening tor
33、que for the terminal connector screws is 2.0 Nm (18 in-lb). Minimum wire size is 18 AWG with a minimum temperature rating of 105C.Grounding Connect the grounding terminal (49) labeled GND on the rear panel to a rack frame ground or main station ground for proper safety and performance. Use 12 AWG (4
34、 mm2) or heavier wire less than 2 m (6.6 feet) in length for this connection. The ground connection should be made before the power connections.CleaningUse care when cleaning the SEL-2595. Use a mild soap or detergent solution and a damp cloth to clean the chassis. Be careful cleaning the front and
35、rear panels because a permanent plastic sheet covers each panel; do not use abrasive materials, polishing compounds, or harsh chemical solvents (such as xylene or acetone) on any surface.Terminal 49Terminal 47 Terminal 48IMPORTANT NOTE: Do not connect power to the SEL-2595 until you have completed t
36、hese procedures.Date Code 20060721 Instruction Manual SEL-2595 Teleprotection TerminalConfiguring the SEL-25957Configuring the SEL-2595The SEL-2595 has a 10-position control (DIP) switch to set the transmit address, receive address, and timing mode as shown in Figure 9.Figure 9 SEL-2595 Control Swit
37、ch Position IdentificationsSetting theTransmit andReceive AddressesSet the transmit (TX) address of each local SEL-2595 to match the receive (RX) address of the remote SEL-2595. The RX and TX addresses of each device should always be set to different numbers. The SEL-2595 detects a loopback conditio
38、n when it receives the same address as the TX address setting. When the SEL-2595 detects loop back, it illuminates the LOOP LED and extinguishes the DATA LED. The SEL-2595 disables the contact outputs to prevent acting on its own message during loop back.The SEL-2595 provides 16 transmit and receive
39、 address choices. Table 1 lists the switch positions for the 16 addresses.Switch No. Function14 Transmit Address (TX)58 Receive Address (RX)9 Timing Mode10 OUTPUT DelayON OFF123 54678910Table 1 Transmit and Receive Address Settings Sheet Switch Switch Switch Switch AddressTXRX15263748OFF OFF OFF OFF
40、 1ON OFF OFF OFF 2OFF ON OFF OFF 3ON ON OFF OFF 4OFF OFF ON OFF 5ON OFF ON OFF 6OFF ON ON OFF 7ON ON ON OFF 8OFF OFF OFF ON 9ON OFF OFF ON 10OFF ON OFF ON 11ON ON OFF ON 12OFF OFF ON ON 13ON OFF ON ON 14OFF ON ON ON 15ON ON ON ON 16SEL-2595 Teleprotection Terminal Instruction Manual Date Code 200607
41、21Testing and Troubleshooting8Setting theTiming ModeSwitch 9 sets the timing mode for the SEL-2595. For normal operation set this switch to ON. In this mode, timing is recovered from the host multiplexer. When testing SEL-2595 devices without a multiplexer, connect the fiber directly between two SEL
42、-2595 modules and set Switch 9 to the test position on only one SEL-2595.When connecting two SEL-2595 modules back-to-back, set one timing mode switch to OFF. With the timing mode switch set to OFF, the SEL-2595 provides a timing source for both of the SEL-2595 modules.Setting theOUTPUT DelaySwitch
43、10 controls the output contact response time. When the switch is set to the OFF position, the ALARM contact will drop out with a 100-ms delay when an alarm condition is detected.When Switch 10 is set to the ON position, a 2-second delay is added to the dropout time of the ALARM contact. A 100 ms hol
44、d time is also added to the 8 output contacts.Connecting the SEL-2595 toa MultiplexerUse a duplex fiber-optic patch cord to connect the SEL-2595 to an IEEE C37.94 compliant channel card. Connect the TX ST connector on the SEL-2595 to the RX ST connector on the multiplexer channel card, and connect t
45、he RX ST connector on the SEL-2595 to the TX ST connector on the multiplexer channel card, as shown in Figure 10.The LEDs are not user serviceable. Return the device to the factory for repair or replacement.Figure 10 Fiber-Optic ConnectionsTesting and TroubleshootingTest the SEL-2595 with either a d
46、irect fiber connection to another SEL-2595, or with two SEL-2595 modules connected through a multiplexer.Step 1. Configure the SEL-2595 control (DIP) switch ID settings.a. Make sure the TX address of the local SEL-2595 matches the RX address of the remote SEL-2595.b. If the connection between the SE
47、L-2595 modules is direct fiber, set the timing control switch 9 to OFF (test) on one SEL-2595.c. If the test setup includes multiplexers, set switch 9 to ON (normal) on both SEL-2595 modules.!CAUTION: Use of controls or adjustments, or performance of procedures other than those specified herein, may
48、 result in hazardous radiation exposure.RX TXFiber patchcordMultiplexer channel cardinterfaceDate Code 20060721 Instruction Manual SEL-2595 Teleprotection TerminalTesting and Troubleshooting9Step 2. Connect the chassis ground terminal of the SEL-2595 to ground (terminal 49).Step 3. Connect and apply
49、 rated voltage to the power supply inputs of the SEL-2595 (positive to terminal 47, negative to terminal 48).The ENABLED LED should illuminate. The Form B ALARM contact will remain closed and the ALARM LED will illuminate (red) because of no communication.Step 4. Press the LAMP TEST button.All LEDs should illuminate. When you release the button, the contact input and output LEDs should extinguish and the remainder will return to indicating the current communication status.Step 5. Make the fiber-optic connections between SEL-2595 modules either directly or through a mu
