the new GARD 8000 ® brochure
Contents
1. 04 06 04 04 06 04 Details 6 Details08 Details09 Details 10 04 06 04 g a 04 06 04 04 06 04 04 05 04 o B c 04 05 04 Figure 2 Sequence of Events Log 09 41 04 003 15 48 03 761 14 45 09 103 13 12 08 127 08 45 07 013 07 31 06 942 05 15 05 538 04 51 04 764 04 48 09 567 03 27 06 685 03 15 07 947 14 39 08 083 14 39 09 921 Input 2 DTT Input Comms Alarm Output 2 Transmitter 1 DTT Input RX DTT 1 Comms Alarm Hardware Alarm RX DTT 1 Comms Alarm Hardware Alarm Input 1 Sequence of Events Figure 2 shows the Sequence of Events directory listing the record number date time trigger label status and color indicator Figure 3 shows the details from event record 1 January 2010 GARD 8000 System Customer Service Home Details Of Event 1 Event Time 00 00 00 00 00 00 000 Logic Table Status Bit Status Trigger Label Logic Changed State Inactive j TRIGO LNO No 1 Inacove aa No 2 Inactive 1 TRIG2 LN2 No 3 Inacove i TRIG3 LN3 No 4 Inactive j TRIG4 LN4 No 5 Inacove l TRIGS LNS No 6 inactive 1 TRIG6 LNG No 7 Inacove 1 TRIG7 LN7 No 8 Inactive i TRIGS LNS No 9 Inacove l TRIG9 LNG No 10 Inactive M TRIG10 LN10 No 11 Inacove 1 TRIG11 LN11 No 12 Inactive TRIG12 LN12 No E Figure 3 System of Events Details Programmability Logic functions can be changed or fine tuned remotely through the GARD 8000 Teleprotection unit s TCPIP or RS 22. Figure 13 Rack or cabinet Mounting 6U Figure 14 Panel Mounting 6U January 2010 11 RFL GARD TPC RFL Electronics Inc 353 Powerville Road Boonton Twp NJ 07005 9151 Tel 973 334 3100 NS ai Fax 973 334 3863 gt gt www rflelect com 150 9001 2000 sales rflelect com
3. um m LA du LE MI 2 m 4 B 0 oO dB amp EN ct E Dus LR RR m o I LA DNP MODBUS User Interface z 1 i T iow i f T i i 1 a T LT i i al WES Des 4 U i Lio 1 Li a e 4 1 n n 1 3 Pz E n u Pa r L a o b i amp a 3 mn j ard LI 4 a GPS Input x DE 3 LE MT x k Distance Relay Input Outputs Groups of 6 Input Outputs Figure 16 Rear View 6U GARD 8000 Digital Protection System with 4 Digital Interfaces 4 F ion Audio T P ion M TCPIP Interface unction Audio Tone Protection Module Multiprotocol Digital I O IRIG B Input eo Ethernet Status LED V 35 RS 449 X 21 GPS Input RS 232 Serial User Interface Input Output Modules Primary amp Back up Power Input DNP MODBUS Interface Figure 17 Rear View 3U GARD 8000 Dual Analog Protection System January 2010 10 RFL GARD TPC i GARD 8000 Single Function PLC 3U System Dimensions 10 32 Thread 4 Places CUTOUT EU 17 750 17 625 Min 0 28 SUI Figure 11 Rack or Cabinet Mounting 3U Figure 12 Panel Mounting 3U 6U System Dimensions 0 187 Dia 8 Req or 10 32 Thread gi n dd us m aid Mu c ed E b Sr a fe m gT mm z a teur F 2 Li at be r a re Pr m Es Lu ut uar un FR gt EE p Cr b om m re Tg uu FFF ar CUTOUT
4. TCP IP network To EMS To remote line end WAN Station Level Bus Process Level Bus Figure 11 IEC 61850 Substation The GOOSE message is routed to perform trip functions of circuit breakers but a shortcoming with the network is that there is no easy means to transfer a GOOSE message to a remote location if the Ethernet network does not encom pass the two substations The GARD 8000 Ethernet trip ping module solves this dilemma by retrieving GOOSE messages from the LAN and transporting them over any of its communication interfaces GA RD S000 Figure 12 GARD 8000 teleprotection between two IEC 61850 substations January 2010 The GARD 8000 provides the link between two IEC 61850 substations over any communication media The sending GARD 8000 retrieves GOOSE messages from the sub station LAN puts it on a communication link to a remote GARD 8000 that puts it on its substation LAN Figure 13 GARD 8000 Teleprotection between an IEC 61850 substation and a conventional substation Generally a new IEC 61850 substation needs to interact with a conventional substation at remote line ends In this case the GARD 8000 retrieves GOOSE messages for transfer trip or pilot relaying operations from the IEC 61850 substation LAN transports them over any communication link and the remote receiving GARD 8000 performs nor mal teleprotection operations such as tripping of breakers and pilot relaying signaling In additi
5. alarm reporting capabilities Programmable Contact Output Any alarm output that is defined in the system logic can be programmed to a user defined output You can have as many outputs as needed for alarm requirements The GARD 8000 alarm configuration page allows the user to program system level Minor or Major alarms When a Mi nor or Major alarm is triggered an output will be initialized on the unit DNP3 The GARD 8000 can broadcast DNP3 message through the Ethernet port or the integrated RS 485 port to support DNP masters along with solicited or unsolicited mes sages SNMP The GARD 8000 can generate SNMP V2C traps in the event of an alarm condition The alarm traps are program mable The GARD 8000 has HMI Output bits which can be defined by the user to refer anything in the system logic This includes alarms and trip inputs outputs By using the built in web interface each HMI output can be assigned a text label by the user If an alarm event occurs a trap will be generated and will include the version number V2C Notification the RFL OID and the timestamp RFL GARD TPC Examples of GARD 8000 System Configurations RS 232 Serial User Interface RS 449 Digital Teleprotection Interface Ethernet Status LED T1 E1 Digital Teleprotection TOPIP User Interface Interface Multiprotocol Digital I O ey V 35 RS 449 X 21 he Primary amp Back up power feeds pet T a2 r E Il IE m ye E t ig
6. 0 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 varia tions Trip Boost Amplitude Adjustable from zero to 12 dB in 1 dB steps Duration Adjustable from zero to 30 seconds in 25ms steps Input and Output Impedance 600 Ohms 16 Point Bidirectional Status Requires use of modem channel Bandwidth 300Hz 150 Hz Transmit time 110ms one way RS 232 Data Channel Requires use of modem channel Bandwidth 300Hz 150 Hz Data rate 300bps RS 232 Software handshaking TX RX data Digital Teleprotection Each Digital TPS Engine can transfer up to 32 functions These functions are broken down into 4 different func tion blocks Each can be configured independently and sent over the communications bus to the communications interface of choice Figure 5 shows a GARD 8000 with the four standard fun ction blocks configured with three different communica tions interfaces Specifications are subject to change without notice January 2010 RFL GARD TPC Function Block 1 C37 94 Fiber Optic Interface 8 Functions Function Block 2 8 Functions 128 Kbs RS 449 Digital Interface Function Block 3 8 Functions Function Block 4 BEGRChoRS G 703 Interface Figure 5 GARD 8000 System Diagram Fiber Optic Communications Fiber Optic Communications Interfaces and System Gains are as fo
7. 32 port User Programmable Logic Functions Change timer values logic states and logic functions without ever removing a module or opening the chassis User Programmable Inputs and Outputs The 3 rack GARD 8000 System unit has 8 I O slots in the back to house a number of communications or discrete I O modules All logic mapping to the inputs outputs and communications is fully programmable to meet specific customer requirements Create your own alarm conditions The GARD 8000 Teleprotection unit can be programmed to any alarm configuration desired using the outputs on the I O modules Every GARD 8000 Teleprotection unit is supplied pre programmed with either default operating logic or custom logic It should be noted that it is standard practice for RFL to provide system programming with every unit at no charge Figure 4 shows the parameter settings for Chan nel 4 of the audio tone version RFL GARD TPC Ah GARD 8000 System Channel 4 Settings Ch4 RX Center Frequency 300 4000 inc 1 Ch4 RX Shift Ch4 Rx Level 40 0 inc 1 15 dB Ch4 Rx Alarm 40 0 inc 1 30 dB Ch4 TX Center Frequency 300 4000 inc 1 Ch4 TX Shift Ch4 Tx Level 30 0 inc 1 Ch4 Tx Boost 0 12 inc 1 Ch4 GBT Timer 0 1000 inc 0 25 100 ms Ch4 TAG Timer 0 1000 inc 0 25 Ch4 PRETRIP1 Attack 0 100 inc 0 25 Ch4 PRETRIP1 Decay 0 100 inc 0 25 Ch4 PRETRIP2 Attack 0 100 inc 0 25 Ch4 PRETRIP2 Decay 0 200 inc 0 25 Ch4 BLOCK Attack 0 1000 in
8. Range 19 29 Vdc Burden lt 100W 48 125V Rated 48 125 Vdc or 120 Vac Range 38 150 Vdc or 96 132 Vac Burden lt 100W 250V Rated 250 Vdc or 220 Vac Range 200 300 Vdc or 200 240 Va Burden lt 100W Power Supply A single or redundant power supply can be provided depending on the reliability of the application For example a DTT application for a higher voltage level line may de mand the dependability of a redundant power supply Note The GARD 8000 Power Supply I O provides two Form C alarm contacts for major and minor alarms 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 i5 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 5 ms depending on mode of operation Operate Time is defined as the time from the Specifications are subject to change without notice January 2010 RFL GARD TPC T receipt of a command input to the response of a solid state output less any channel propagation time Pre Trip Timer Adjustable in 0 25 ms steps Trip Hold Timer Adjustable in 0 25 ms steps Command Extend Timer Adjustable in 0 25 ms steps Non Volatile Storage All parameters relating to system operation are stored in erasable non volatile RAM All parameters related to event logging are stored in capacitor backed RAM RFI Susceptibility ANSI PC37 90 2 35 Vol
9. ates the need to study written instruc tions If preferred the instruction manual that also resides in the device is simply accessed by the HELP function For off line preparation of settings and configuration files a small application program emulating a GARD 8000 System which is available free of charge can reside on the PC or local server A PC is connected to the front TCP IP port with a standard connector Configure TimeSlots Save Figure 10 Ethernet Connector Input and Output Modules The GARD 8000 System is configured with a selectable number of input and output modules on the rear part of the chassis January 2010 The following combinations are available for mounting in the up to 10 rear slots 6U or 4 rear slots 3U e 1 communication interface 6 inputs e 1 communication interface 6 outputs e 6inputs 6 inputs e 6inputs 6 relay outputs 6inputs 6 solid state outputs e 6 solid state outputs 6 solid state outputs e 6 solid state outputs 6 relay outputs 6relay outputs 6 relay outputs e 4 latching relay outputs 4 form C contacts All relay output contacts are Form A NO or Form B NC jumper selectable A simple setting for an inverter logic gate provides inversion for each input and output Each input and output has a timer associated with it that has settings for both pick up delay input debounce output security and drop out delay pulse stretch With the exception of the latc
10. c 0 25 Ch4 BLOCK Decay 0 1000 inc 0 25 Figure 4 Channel Parameter Settings System Specifications Audio Teleprotection The GARD 8000 audio tone teleprotection module pro vides four FSK transmitters receivers All transceivers are bidirectional and can be programmed for any operat ing frequency or bandwidth between 300 and 4 000 Hz Channel one can be set to operate as a modem channel This channel provides a communication link to the remote terminal for remote interrogation Channel one can also be configured to be used for bi directional status up to 16 points are supported The channel can also be used to transmit RS 232 data at rates up to 300bps When status or data is enabled the remote interogation feature can not be used Audio Interface Configurations Single Two Wire Terminals Single Four Wire Terminals Recommended Channel Frequencies Range 300 Hz to 4000 Hz Resolution 1Hz Transmit Level Adjustable from 30 dBm 0 dBm in 1dB 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 4
11. d handling greatly simplified Front Panel LEDs Two rows of ten multi colored LEDs provide basic event information The LED operation is fully configurable and labels can be changed to suit the application Custom configuration and labeling can be factory made by RFL without extra charge Any field modifications required are simply made by use of the browser interface Front Panel Display An optional touch screen display TSD is available for metering targets and settings The TSD provides a color screen that will automatically orientate itself for horizontal or verticle mounting User programmable buttons are pro vided for unique customer requirements For things such as breaker control or cut in cut out switches gt amp Reset Figure 6 GARD 8000 Front Panel LEDs 6U Figure 7 GARD 8000 3U Front Panel Specifications are subject to change without notice January 2010 RFL GARD TPC i Web Browser User Interface All interaction with the GARD 8000 System is made by the use of a standard web browser The web pages reside in the device no special application software is required on the PC Web browser technology provides a much higher level of ease of use as compared to the conventional menu driven operation It is fast and simple to view device status ac cess diagnostic and test functions and to change settings Emulating the operations of a standard web site navigation is intuitive and elimin
12. e A Up ta 12 channels per interface Tit H5449 56 768 kbps X21 64 768 kpbs V 35 64 768 kbps Functional p Module 1 Functional emma Functional e Module 3 Functional Functional Functional Module 6 G 703 64 kbps C3794 64 768 kpbs Fiber 56 768 kbps and or Audio tone modem Comms P acc 3 3 HE EE 5j 3 Comus diem Interface D Comms ee interface E Comms dumm interface F Figure 1 System Architecture RFL GARD TPC Diagnostics and Testing Diagnostic information is available and easily accessible with the GARD 8000 Teleprotection unit RFL s diagnostic package takes the guesswork out of power system fault analysis and evaluating communications system perfor mance during the fault clearing process The GARD 8000 Teleprotection provides the following standard features Two TCPIP ports electrical or fiber One RS 232 port for local or remote access 600 Sequence of events records Internal real time system clock e IRIG B Clock sync input Current status of all system parameters e Diagnostic information about the remote end Checkback testing either locally or remotely initiated Automatic checkback and addressing Channel propagation delay measured and reported Sequence of Events f Date Time Trigger Label Status 04 08 04 09 41 04 050 Input 1 LO I 04 08 04 04 07 04 04 07 04 04 07 04 04 06 04 04 06 04
13. ed to access the product A most unique feature is that the user manual and customer system and application drawings are stored in the GARD 8000 in Adobe pdf format and are easily accessible from the GARD 8000 web browser The GARD 8000 is available in a 3U chassis 5 25 which can support up to two additional analog or digital telepro tection function modules or a 6U chassis 10 50 which can support up to eight analog or digital teleprotection function modules Other GARD 8000 communications or protection modules can be used in the chassis if desired Redundant controller and power supplies are available as options for applications where ultra reliable systems are required Applications The GARD 8000 Teleprotection communications interface can be configured for audio digital fiber optic or Ethernet LAN per the IEC 61850 standard It is well suited for stan dard and non standard pilot protection schemes such as Permissive Transfer Trip Direct Transfer Trip e Blocking and Unblocking e Remedial Action schemes 96 status bits over a 56 64 kbps channel January 2010 e Transfer trip plus bi directional status e Transfer trip with slow speed RS 232 data The GARD 8000 can have up to twelve communications interfaces which allow the product to be used over all com munications media available The following digital inter faces are available for the GARD 8000 RS 449 X 21 V 35 DB37 connector this multi protocol i
14. hing relay module which is form C only Optically Isolated Inputs Quantity 6 per module Input Voltage Jumper Selectable 24 48 125 250 Vdc Operation Range 24 Volts 19 to 36 Vdc Nominal Input 48 Volts 37 to 68 Vdc 125 Volts 94 to 150 Vdc 250 Volts 189 to 300 Vdc Input Current 1 5 mA minimum Minimum Pulse Width 0 03 ms additional debounce time set in the logic Solid State Outputs Quantity 6 per module Output Current Maximum 1 A continuous 2 A for 1 minute or 10 A for 100 msec Open Circuit Voltage 300 Vdc maximum Pick up Time 0 msec Relay Output Quantity 6 per module Relay Pick up Time 4 msec Output Current Rating 6 A continuous Surge 30 A for 200 msec Alarm Relays Quantity 2 Contacts SPDT Form C Output Current 100 mA 300 Vdc resistive load Terminal Connections Screw terminals for ring lugs with wire up to AWG 10 RFL GARD TPC Native I EC 61850 The GARD 8000 complies to the requirements stated in IEC 61850 2 for teleprotection equipment The HMI func tions come standard with the GARD 8000 however if trip ping capability over a LAN is desired the optional ethernet tripping module is required Ethernet Tripping Module I EC 61850 compliant The GARD 8000 System can be provided with an Ether net Tripping Module IEC 61850 substation automation provides a LAN Local Area Network in the substation where trip messages are passed between the devices via GOOSE messages on a
15. llows Wavelength amp Connector Output Receiver System 1300nm LED Singlemode ST h7 dBm 39dBm 21 dB 1300nm Laser Singlemode 39 dBm 39 dB 25 C Real Time Clock IRIG B The GARD 8000 Teleprotection unit accepts the IRIG B Standard Time Code on a 1kHz modulated or unmodu lated 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 imped ance and Is transformer isolated Resolution 1 ms Accuracy Free Running Within 1 minute per month Under IRIG B Control 1ms Reset Manual or by IRIG B code SNTP Simple Network Timing Protocol The GARD 8000 comes with standard support for SNTP Settings are accessed via the web browser General Specifications Events Storage The Sequence of Events Recorder on the main controller module can store up to 600 events TCPIP Port Two TCPIP ports one on the front one on the back RS 232 Interrogation Ports The GARD 8000 Teleprotection unit provides one RS 232 Ports located on the rear of the chassis The rear RS 232 port is configured as a DTE Interface Number of Stop Bits One Parity None Flow Control XON XOFF Isolation The GARD 8000 Teleprotection unit s RS 232 ports front and rear panel are isolated from circuit common and chassis ground to a surge withstand level of 500 Vdc Input Power Requirements EN 60834 1 24 V Rated 24 Vdc
16. m GARD 8000 Teleprotection Channel System Features One product for all your digital analog and IEC 61850 teleprotection needs User defined logic and alarms for your specific applications Straight forward web browser user interface for settings and diagnostics no proprietary application program required Supports SNTP Simple Network Time Protocol Optional built in GPS receiver provides accurate time tags Complete address and checkback testing DNP3 Level 2 compliant SNMPV2 Compliant IEC 61850 HMI standard Full system redundancy option available Optional pass through 56 64kbs or 19 2kbs Mirrored Bit multiplexer relaying channels Additional plug in protection modules such as RFL Distance and Current Differential Relays Supports NERC FERC security standards January 2010 Teleprotection Features Digital system comes standard with 32 functions for tripping applications 4 Channels available on Audio Teleprotection Module 16 point bidirectional status amp RS 232 data option avail able for analog TPC systems Optional IEC 61850 LAN tripping module oystem can accommodate multiple teleprotection schemes in one chassis Analog and digital systems can be mixed in one chassis 1 1 and other redundant back up schemes are easily supported 96 bit high capacity 56 64kbps status transfer module option Complete range of digital and fiber optic interfaces including C37 94 Remote interogation of fa
17. nterface is standard with all systems Analog and Digital G 703 DB15 connector T1 E1 DB15 connector E1 BNC connector 50 75 Ohm C37 94 short haul fiber 820nm and 1300 nm LED ST connector provides up to 12 channels for teleprotection functions 1300nm LED SM MM ST connector 1300nm LASER SM ST connector 1550nm LASER SM ST connector IEC 61850 TCPIP interface A GARD 8000 can be configured with many functional tele protection modules each with their own communications interfaces an example of this is shown in Figure 1 These communication channels can be configured for primary and back up communications channels For example 8 digital teleprotection commands from Functional Module 1 can be transmitted over communications interface A via direct fiber optic link and another 8 digital teleprotection commands from Functional Module 2 can be transmitted over communications interface B via a digital microwave This configuration capability also allows a user to consoli date the number of teleprotection boxes used for an appli cation A primary and a back up scheme can be configured with one GARD 8000 each of the protection schemes can be configured with back up communications channels and also redundant power supplies and processors This con figuration will have a higher overall MTBF than two sepa rate conventional protection channels and will cost less 8channels 64 kbps per functional module Comms P interfac
18. on in case pilot relaying and teleprotection need to be performed over an Ethernet network between two con ventional substations a GARD 8000 at each line end can send GOOSE messages over the network for intertripping Ethernet HetvvorE GARD 2000 GARD s000 aj oap PR E E mcs S SNR E TIG E Conventional Sub Conventional Sub Figure 14 GARD 8000 Teleprotection over an Ethernet Network RFL GARD TPC High Capacity Status Transfer Module The GARD 8000 standard Teleprotection System supports up to eight high speed functions in one 64 kbps channel For telemetry applications there is often a need to trans port a higher number of status points but transmission time is less critical than for teleprotection signaling To complement the teleprotection systems a high capac ity status module is available This module supports up to 96 status bits over a 64 kbps channel End to end delay is 7 12 ms depending on the security count used The high capacity status transfer module can be added as an optional front mounted module or be supplied instead of the standard teleprotection system on the Base TPS Display board Multiplexer Pass Through Channel The GARD 8000 has 12 built in communications channels that can be used for Teleprotection and other Protection applications These communications channels can also be used with external devices that require a communications or pilot channel to operate Thi
19. r end with analog and digital systems 10 Year Warranty RFL GARD 8000 TPC System Description The GARD 8000 Teleprotection channel is a revolution ary product platform that provides the user with a fully programmable system that can be used for Direct Transfer Trip Permissive Transfer Trip Blocking and Unblocking applications The product is unique in that the same plat form is used for analogue digital and IEC 61850 LAN trip ping applications The base system is the digital platform that can be used to transmit and receive up to 32 functions in groups of 8 Each block of 8 commands is transmitted over a 56 64kbs data channel these data channels can be any of the supported digital interfaces In essence the user is provided a teleprotection channel that has four conventional 8 function teleprotection systems built in for the price of one Based on the RFL 9745 Teleprotection channel the GARD 8000 Teleprotection system carries relaying communica tions to the next level The system uses fully programma ble logic and settings that can be uploaded or downloaded using the built in TCPIP electrical or optical or RS 232 interface Communicating with the system is done with either a laptop PC using Web Browser or with the optional built in color TSD touch screen device that communi cates with the GARD The GARD 8000 has a built in web server that contains all of the user settings No special or proprietary software is requir
20. s allows the GARD 8000 Teleprotection channel to also be used as a substation multiplexer that other protective relays can be interfaced with The GARD 8000 can be configured with 56 64kb channels with RS 449 G 703 and C37 94 fiber optic interfaces The unit can also be configured with a dual RS 232 commu nications channel for Mirrored Bit relaying or other slow speed devices Figure 15 shows a RFL 9300 current dif ferential relay and a Mirrored Bit relay communicating over a GARD 8000 Teleprotection channel configured with two relaying communication interfaces 19 2 kbps 56 64 kbps f a if Figure 15 GARD 8000 Used as a Multiplexer January 2010 i GPS Module Accurate time stamping is essential for evaluation of protection system operations especially following a major system disturbance The substation may be equipped with a GPS central clock that can be connected to the GARD 8000 IRIG B port When a central clock is not available the GARD 8000 can have its own built in GPS receiver When the GARD 8000 is equipped with the internal GPS receiver the IRIG B port can be used to supply IRIG B to other devices This enables not only the GARD 8000 System to keep accurate time tags but other protective devices also have access to a dc powered substation hardened time source that is independent from any cen tralized GPS system Alarm Reporting The GARD 8000 System Platform provides three types of
21. ts Meter EN 60255 22 3 RFI Class Ill 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 2002 SWC and Fast Transient EN 60255 5 1500 Vrms Breakdown Voltage and Impulse Withstand EN 60255 22 1 SWC Class III EN 60255 22 2 ESD Class III EN 60255 22 4 Fast Transient Class III EN 60834 1 Temperature Operating 20 C to 75 C 4 F to 167 F Storage 40 C to 85 C 40 F to 185 F Relative Humidity Up to 95 percent at 40 C 4104 F non condensing Warranty Statement HFL s standard warranty for the GARD 8000 Teleprotec tion unit is 10 years from date of delivery for replacement or repair of any part which fails during normal operation or service User I nterface Protection system reliability may be compromised by increased complexity of protection devices While these protection devices offer added flexibility they also increase the risk for errors Complicated settings configurations and interconnections all combine to having an undesirable effect on protection system security and dependability The GARD 8000 System is designed with ease of use in mind While high functionality and great detail is provided it is not necessary to make field configurations if not desired The web browser User Interface makes interac tion with the device highly intuitive an
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