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| REA, the latest arc protection system developed by ABB, combines a unique sensor technique with instantaneous and reliable fault detection, solid state trip outputs and an extremely fast total system operating time. These are qualities that minimize damage, allow power distribution to be smoothly restored, and may even save human lives. The use of the extension unit allows the protection area to be extended. |
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Power Solution for Bus Bar Differential Protection
Use the SEL-487B Bus Protection and Breaker Failure Relay to protect bus systems with up to 18 terminals (54 CTs) and 6 protection zones. Differential and directional current elements provide increased security and fast fault detection. The SEL-487B provides accurate, timely monitoring and metering of busbar, feeder, and substation signals. Terminal currents, breaker and disconnect positions, station dc voltage levels, and three-phase voltage are continuously monitored and updated. Simplify interconnect wiring using multiple communications protocols and ports. Use different ratio CTs and nondedicated CTs with the SEL-487B. Use CT ratios that differ by up to a factor of 10:1. Use the same CT for differential protection, metering, backup relaying, and other functions. |
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| A comprehensive range of electronic control products, providing continuous monitoring and protection of any electrical parameter. When the monitored parameter deviates from the desired set point limit, the relay will operate to protect the power asset. Designed to suit a wide variety of applications, the range offers both traditional and technologically advanced products, including single parameter units, earth leakage protection, vector shift and ROCOF, and multifunctional microprocessor based system protection relays. |
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Select the SEL-321 Relay for complete distance protection including single-pole tripping and series-compensated lines.
Apply the SEL-321 Relay for primary and/or backup single-or three-pole trip transmission line protection,including series-compensated lines.Use the advanced single-pole tripping logic with phase selection, open-pole interval protection,and phase discordance logic with three-pole trip to protect against excessive single-pole-open events. Select the load-encroachment feature to prevent operation of three-phase elements under high load conditions. Use the time-overcurrent elements to provide current-dependent, time-delayed fault detection along the protected line and backup protection for remote terminals. SEL SEL-321 has six settings groups for maximum protection scheme flexibility, allow application with bus-tie breakers or for remote system reconfiguration.
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Select the SEL-351A Distribution Protection System for complete, economical distribution feeder protection, automation, monitoring, and control.
Provides primary or backup overcurrent protection with directional control on distribution systems with sensitive phase, negative-sequence, residual, and neutral overcurrent elements. Includes under-/overfrequency elements, accurate metering, reclosing control, and an optional local front-panel display.
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The feeder protection relay REF 610 is part of the RE_ 610 series of numerical relays for the protection and supervision of utility substations, and industrial switchgear and equipment.
The protection relay REF 610 is primarily targeted at the protection of incoming and outgoing feeders in distribution substations. REF 610 is also used as back-up protection for motors, transformers and generators, in utility and industry applications.
The numerical feeder protection relays support a wide range of standard communication protocols, among them the IEC 61850,
IEC 60870-5-103, Modbus, Profibus and DNP.
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| The SEL-751A Feeder Protection Relay is designed to be used in industrial and utility feeder protection, with flexible I/O and easy mounnting options. Maximize control scheme flexility with time- and instantaneous overcurrent, over- and undervoltage, and frequency elements. The four programmable front-panel pushbuttons are convenient for quick, personalized control. Choose from Ethernet or serial communications and serveral protocols including MIRRORED BITS, Modbus, and IEC 61850. The base unit includes 3 digital outputs and 2 digital inputs. There are three card slots for optional I/O cards. |
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The REM 543/545 terminals are ideal for protection and control of your electric motors and power generators, offering ease of use and reliable, proven performance. With their wide range of communications and connectivity support, they can easily be integrated into your process or plant automation and supervision system.
The REM 543/545 terminals provide complete protection for rotating machines. The terminals are intended for large asynchronous and synchronous motors and for small and medium-sized power generators. The motor and generator terminals have been successfully employed in challenging environments, such as mines, mills, marineand off-shore, and in demanding applications including base-load and peak-power generating sets, pumps, fans and crushers.
The motor and generator terminals REM543/545 have been certificated for marine and off-shore use by Det Norske Veritas(DNV), and have obtained type approval by Registro Italiano Navale (RINA), Lloyd's Register of Shipping and Germanischer Lloyd, as well as UL recognition by Underwrites Laboratories Inc. |
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| In order to make technology available for the first time that complies with IEEE turbine protection standards, SEL has applied its expertise in the production of microprocessor-based relays to create the SEL-300G, a generator relay that includes several unique features designed for unsurpassed protection, monitoring, and control of electrical generators. SEL designed the SEL-300G to meet the needs of a variety of users, including utility and industrial power plants and generator set manufacturers. |
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SEL-710 Advanced Motor Protection
The SEL-710 Motor Protection Relay features the industry’s most accurate motor protection together with settings, mounting, and communication options designed for easy application.
The SEL-710 calculates the motor speed from the voltage and current, and the electrical model of the motor. Knowing the speed, it accurately calculates the rotor heat, solving high-inertia starting problem. Accurate heat calculation also minimizes the cooling period required between starts for all motors.
The SEL-710 with the AccuTrack™ Thermal Model determines the longest safe starting time (no speed switch needed) and reduces wait time between motor starts up to 33%.
Easily set motor protection with motor nameplate data. The small footprint and flexible mounting options allow easy retrofit without cutting or drilling. The user configurable front panel gives users flexibility for custom messages, alarms, and pushbutton actions.
The SEL-710’s flexible system of slide-in I/O and communication cards delivers up to eight communication protocols, including Ethernet, Modbus, and DeviceNet. Send information to a remote terminal, central control room, engineering access, and other locations using multiple protocols simultaneously.
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Protect lines with easy-to-use current differential relays. Sensitive differential elements provide sub-cycle operating time. Restraint for external faults uses an easy-to-set vector ratio of remote and local currents. Protect transmission lines using differential and a combination of four stepped-distance zones of phase and ground-distance elements in communications-assisted schemes, with directional overcurrent element backup protection. Patented Capacitance Voltage Transformer (CVT) transient overreach logic enhances security of Zone 1 distance elements. Best Choice Ground Directional Element™ logic optimizes directional element performance and requires no directional settings. Use the optional single-pole tripping capability of the differential elements to improve system stability. Programmable four-shot breaker auto-reclose with synchronism and voltage check logic for optimal system restoration.
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The motor protection relay REM 610 is part of the RE_ 610 series of numerical relays for the protection and supervision of utility substations, and industrial switchgear and equipment.
The motor protection relay REM 610 is primary targeted at protecting large asynchronous low-voltage motors and small and medium-sized high-voltage asynchronous motors. REM 610 handles electrical fault conditions during motor start up, normal operation, idling, and cooling down at standstill, e.g. in pump, fan, mill or crusher applications. The relay can be used with both circuit-breaker controlled and contactor-controlled drives. REM 610 can also be used for the protection of cables feeders and distribution transformers that require thermal overload protection besides overcurrent, earth-fault and phase unbalance protection.
The numerical motor protection relays support a wide range of standard communication protocols, among them the IEC 61850,
IEC 60870-5-103, Modbus, and Profibus.
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Get comprehensive motor protection and SEL-exclusive reporting and trending that save you money in your industrial motor plant and processes. The SEL-749M uses the latest enhancements in the SEL-patented thermal overload model to accurately track the heating effects of operating and cyclic overload currents. The relay offers all basic motor protection features, including short circuit, load loss, load jam, and frequent starting protection as well as imbalance current and phase-reversal protection. Add optional voltage, I/O, and communications capabilities to build the SEL-749M that is just right for your application.
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General characteristics:
- Overload protection with thermal memory
- Phase aymmetry and phase sequence protection
- External display module for panel mounting (22 mm)
- Not connected to the motor line (passing through wires).
- Manual reset: when tripping as result of asymmetry or phase failure, the relay could be reset after 2 seconds; should tripping be caused by an overload, the waiting time to reset will be directly proportional to its severity, up to approximately 8 minutes.
- Remote reset: after the waiting time has elapsed by interrupting the auxiliary power supply and reconnecting it again after 3 seconds.
- Mounted on DIN rail EN50022-35.
- UL, cUL listed. Marked CE.
- Maximum terminal section : 2.5 mm2, No. 22-12 AWG.
- Maximum screw torque: 20 Ncm, 1.8 LB-IN.
- Norms: IEC 255-22, IEC 801, EN 50081-2, IEC-255, IEC-947
- Insulation: 2000V - 50Hz - 1min/3kV - 1.2/50 µs.
- Storage temperature: -30°C +70°C.
- Operation temperature / Maximum altitude:
-15°C +60°C / 1000 m. |
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Fanox offer a motor protection relay, with ATEX certificate (PTB). It is ideal for motor application on explosive atmosphere.
General characteristics:
- Overload protection with thermal memory
- Phase aymmetry and phase sequence protection
- External display module for panel mounting (22 mm)
- Not connected to the motor line (passing through wires).
- Manual reset: when tripping as result of asymmetry or phase failure, the relay could be reset after 2 seconds; should tripping be caused by an overload, the waiting time to reset will be directly proportional to its severity, up to approximately 8 minutes.
- Remote reset: after the waiting time has elapsed by interrupting the auxiliary power supply and reconnecting it again after 3 seconds.
- Mounted on DIN rail EN50022-35.
- UL, cUL listed. Marked CE.
- Maximum terminal section : 2.5 mm2, No. 22-12 AWG.
- Maximum screw torque: 20 Ncm, 1.8 LB-IN.
- Norms: IEC 255-22, IEC 801, EN 50081-2, IEC-255, IEC-947
- Insulation: 2000V - 50Hz - 1min/3kV - 1.2/50 µs.
- Storage temperature: -30°C +70°C.
- Operation temperature / Maximum altitude:
-15°C +60°C / 1000 m. |
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General characteristics:
- Pump protection (dry working protection) without external sensor
- Overload protection with thermal memory
- Phase aymmetry and phase sequence protection
- External display module for panel mounting (22 mm)
- Not connected to the motor line (passing through wires).
- Manual reset: when tripping as result of asymmetry or phase failure, the relay could be reset after 2 seconds; should tripping be caused by an overload, the waiting time to reset will be directly proportional to its severity, up to approximately 8 minutes.
- Remote reset: after the waiting time has elapsed by interrupting the auxiliary power supply and reconnecting it again after 3 seconds.
- Mounted on DIN rail EN50022-35.
- UL, cUL listed. Marked CE.
- Maximum terminal section : 2.5 mm2, No. 22-12 AWG.
- Maximum screw torque: 20 Ncm, 1.8 LB-IN.
- Norms: IEC 255-22, IEC 801, EN 50081-2, IEC-255, IEC-947
- Insulation: 2000V - 50Hz - 1min/3kV - 1.2/50 µs.
- Storage temperature: -30°C +70°C.
- Operation temperature / Maximum altitude:
-15°C +60°C / 1000 m. |
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| Fanox proposes two models of Thermistor protewction relay (PTC). One model is with automatic reset and the other one y manual reset. |
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The RET 541/543/545 transformer terminals bring reliability and better service to your distribution network and provide all the functions you need to protect and control your transformers. Their easy to use control panel and comprehensive communications and connec-tivity give you access to all the functions you need, whatever your application.
The RET 541/543/545 Transformer Termi-nals are designed for the protection, control, measurement and supervision of two-winding power transformers and power generatortransformer blocks in distribution networks. The terminals are loaded with functionality to suit your application. Besides the three-phase stabilized current differential function featuring 2nd and 5th harmonic restraint, the Basic version termi-nals incorporate three-phase overcurrent, non-directional earth-fault, restricted earth-fault, transformer thermal overload and phase unbalance protection.
The Multi version terminals further include overvoltage and undervoltage supervision, residual voltage and overexcitation protection, overfrequency and underfrequency protection, and underimpedance protection. Enhanced with an optional automatic voltage regulator function the terminal forms an integrated transformer management unit. A special Control version terminal with just voltage regulator and control functions is also available. |
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Multi-Winding Current Differential Protection
Use the SEL-387 Relay for protection, monitoring, and automation applications for important transformers, generators, and other power apparatus. Apply the SEL-387 Relay for protection of two-, three- or four-winding power transformers. Use overcurrent elements from combined CT inputs for backup protection. Use the thermal element to activate a control or issue a warning or alarm when the transformer overheats or is in danger of excessive insulation aging or loss of life. Capture current, hourly or daily, data about your transformer using the thermal event report. Perform predictive maintenance based on accumulated through-fault duty as compared to transformer capability as defined in ANSI Standard C57.109. Use recorded fault values or an alarm set point to initiate an evaluation of transformer maintenance needs. |
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The voltage protection relay REU 610 is part of the RE_ 610 series of numerical relays for the protection and supervision of utility substations, and industrial switchgear and equipment.
The voltage protection relay is primary designed for the overvoltage protection of power system components, such as busbars, feeders, power transformers and capacitor batteries. The relay is also used for general power system earth-fault supervision. Further, the relay can be used for undervoltage protection of motors and overvoltage protection of capacitor batteries, for initialization of automatic busbar changeover, and for disconnecting small power units from the network in cases of network disturbance.
The voltage protection relay REU 610 supports a wide range of standard communication protocols, among them the IEC 61850, IEC 60870-5-103, Modbus, Profibus and DNP. |
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The SIPROTEC 7SS60 system is an inexpensive numerical differential current protection for busbars in a centralized configuration.
It is suitable for all voltage levels and can be adapted to a large variety of busbar configurations with an unlimited number of feeders. The components are designed for single busbars, 1˝-breaker configurations and double busbars with or without couplers.
The use of matching transformers allows phase-selective measurement. Single-phase measurement can be achieved by using summation current transformers.
Features
• Optimized for single busbar and 1˝ circuit-breaker configurations
• Suitable for double busbars with or without couplers
• Separate check zone possible
• Short trip times
• Unlimited number of feeders
• Differential current principle
• Low-impedance measuring method
• Numerical measured-value processing
• Suitable for all voltage levels
• Low demands on CTs thanks to additional restraint
• Measured-value acquisition via summation current transformer or phase-selective matching transformers
• Maintained TRIP command (lockout function)
• Centralized, compact design
• Combinative with separate breaker failure protection
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SIPROTEC 7SV600 is a numerical relay used for circuit-breaker failure protection. It is suitable for use at all voltage levels and in all applications.
Protection functions
• Circuit-breaker failure protection (single or three-pole with/without current)
• Independently settable delay times for operation with and without current
• Single or two-stage time delay of the busbar trip command
• Re-trip (cross trip) stage (1st stage of the 2-stage operation)
• Intertrip facility (via teleprotection interface)
• End-fault protection with intertrip
• “No current” control using the circuit-breaker auxiliary contacts
Features
• Highly sensitive current detection
• 2-out-of-4 check of the current detectors
• Short reset time, negligible overshoot time
• Can be initiated by phase-segregated or common-phase trip commands
• End-fault protection
• Assignable output relays, LEDs and binary inputs
Monitoring functions
• Monitoring of circuit-breaker auxiliary contacts
• Operational current measured values
• Self-supervision of the relay
• Event buffer
• Fault protocols
• Oscillographic fault recording |
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RGU-10 (earth leakage protection relay)
- Instant current leakage and pre-alarm display
- Small size. Just 3 modules
- Type A super-immunized earth-leakage protection, suitable for the new industrial environment
- High frequency current filtering
- Programmable sensitivity and delay times
- Integration into the energy control system of the installation, using RS-485 communications
- Option for earth-leakage reclosing and overload/short circuit protection
CBS-4 (multipoint earth leakage scanning sytem)
- 4 RGU-10 in one single equipment
- Small size. Just 3 modules
- Reduces occupied space and wiring time
- RS-485 Communications
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The differential current relays type SKC is intended for the protection of generators, large motors, two winding power transformers and short lines. The following functions are provided:
thermal (49) for transformer programmable on one of the two sides;
overload (51) and short circuit (50) independently programmable on both sides;
earth fault (50N-51N) or restricted earth fault (87N);
biased differential function for transformers with second and fifth harmonic restraint (87T);
biased differential function for motors, generators, and short lines (87G). |
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SIPROTEC 4 7UT6 are used for fast and selective fault clearing of short-circuits in transformers of all voltage levels and also in rotating electric machines like motors and generators, for short lines and busbars. The protection relay can be parameterized for use with three-phase and single-phase transformers.
Differential protection for
• 2- up to 5-winding transformers (3-/1-phase)
• motors and generators
• short 2 up to 5 terminal lines
• busbars up to 12 feeders (phase-segregated or with summation CT)
Protection functions
• Differential protection with phase-segregated measurement
• Sensitivemeasuring for low-fault currents
• Fast tripping for high-fault currents
• Restraint against inrush of transformer
• Phase/earth overcurrent protection
• Overload protection with or without temperature measurement
• Negative-sequence protection
• Breaker failure protection
• Low/high-impedance restricted earth fault (REF)
• Voltage protection functions (7UT613/633)
Flexible communication interface, eg. IEC 61850 Ethernet protocol. |
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| The L90, a member of the UR family of protection relays, is a digital current differential relay system which provides protection for transmission lines. It may be applied on or adjacent to series compensated lines for three phase tripping. The L90 utilizes an innovative current differential scheme with adaptive restraint that allows the relay to operate correctly even when fault currents are distorted by harmonics or CT saturation. Models are available for application on transmission lines with 2 or 3 terminals. The relay may be used as a standalone device or as a component of an automated substation control system. |
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SIPROTEC® easy are 2-stage numerical overcurrent protection devices and are primarily intended as a radial feeder or transformer protection (backup) in medium-voltage networks.
They provide definite-time and inverse-time characteristics according to IEC and ANSI standards. They prove themselves every day in substations and transformer substations.
The SIPROTEC easy 7SJ45 is powered by current transformers (CT), the power is supplied from the load or short circuit current via the standard current transformers. This makes it particularly interesting for use in substations for the secondary distribution. The auxiliary power supplied SIPROTEC easy 7SJ46 is suitable for universal application due to a wide range AC/DC power supply.
Features:
1. compact dimensions, simple to install - "plug and protect”,
2. housing - suitable for all environments,
3. modern measurement technique,
4. high availability thanks to permanent self-monitoring,
5. very simple and quick parameter setting using dip switches. |
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