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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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Bus or Transformer High-Impedance Differential Relay
Apply the SEL-587Z Relay for single-zone bus protection; or sensitive restricted earth fault protection on grounded, wye-connected power transformer windings. Use high-impedance differential elements for fast tripping for in-zone faults, while providing security during heavy through faults and CT saturation. Reduce panel design cost and space requirements by using a single relay that includes three-phase protection, resistors, and metal oxide varistors. Use front-panel pushbuttons to save the expense of separately mounted control switches. Serial port communication provides for remote control of circuit breakers or other user-defined functions. |
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Superior Differential Protection - With Zero Settings.
Use the economical SEL-387L to provide sensitive, fast, secure three-pole current differential protection with zero settings. The differential operating system of hte SEL-387L requires no settings. Configure the transmit and receive address, and the SEL-387L is ready to protect transmission lines and cables of any voltage. Protect two-terminal transmission lines and subtransmission lines with the same ratio CTs on each end. Apply a 64 Kb digital communications channel for complete phase and ground fault protection with no settings. Replace error-prone pilot-wire relays with a sensitive and secure fiber-optic line current differential relay. Use the built-in communications monitoring and alarm system to improve protection quality. |
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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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The 7SD60 relay is a numerical current differential protection relay, simple to set, operating in conjunction with the remote station via a two pilot-wire link. It is connected to the primary current transformers via an external summation current transformer. The primary field of application of the relay is protection of short overhead lines and cables with two line ends. However, transformers and reactors may be located within the protection zone.
Function overview
Current differential protection with external summation current transformer 4AM49
Suitable for use for distances of 12 km max. via two pilot-wires
Differential protection can be combined with overcurrent release
Pilot-wire monitoring function
Bidirectional remote tripping
Circuit-breaker intertripping at the remote station
Seal-in of the TRIP command until manual reset (Lockout function)
Minimal current transformer requirements due to integrated saturation detector
Restraint against inrush / undelayed trip for high differential fault currents
Emergency overcurrent protection
Operational measured values
Local and remote current
Differential current
Restraint current |
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The 7SD610 relay is a differential protection relay suitable for all types of applications and incorporating all those functions required for differential protection of lines, cables, transformers and busbars. Transformers and compensation coils within the differential protection zone are protected by means of integrated functions, which were previously to be found only in transformer differential protection. It is also well-suited for complex applications such as series and parallel compensation of lines and cables.
It is designed to provide protection for all voltage levels and types of networks; two line ends may lie within the protection zone. The relay features very high-speed and phase-selective short-circuit measurement. The unit is thus suitable for single-phase and three-phase fault clearance.
Digital data communication for differential current measurement is effected via fiber-optic cables, networks or pilot wires connections, so that the line ends can be quite far apart. |
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| Comprehensive and scaleable bus and breaker fail protection for LV, HV and EHV busbars. The B90, a member of the UR Family, features integrated protection and breaker failure for re-configurable LV, HV, EHV multi-section busbars up to 24 feeders. Use one or more B90s together to build a sophisticated protection system that can be engineered to meet the specific application requirements. The B90 performs fast and secure low impedance bus protection with sub-cycle tripping time averaging 0.75 cycles. |
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Product Features:
- To be used with CT-1 transformers.
- Modular size. DIN rail mounting .
- Sealable front cover |
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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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The Earth Leakage Relay's "ELR" - CONTREL families, give the technical solution to the installator and the end user for every applications.
It's wide setting range, for both Current (0,025Έ25 A) and Voltage (0,02Έ5 Sec), allows to perform a real selectivity in the Electrical Installations.
ELR-1E
Earth Leakage Relays. Flush mounting version DIN 96x96 mm with reduced depth enclosures.
ELR-3C
The ELR-3C, maintain all the basic characteristics of the DIN 96x96 mm series, although its reduced dimensions.
ELR-40 / ELR-m40
Earth Leakage Relay Flush mounting versions DIN 48x96 mm with reduced depth of 75 mm.
ELR-8V / ELR-8tcs / ELR-8MV-tcs
Flush mounting version DIN 96x96 mm with advanced functions.ELR-8MV-tcs incorporates the frontal display.
ELR-2 / ELR-2M
Flush mounting version DIN 96x96 mm with reduced depth enclosures. ELR-2M fitted with the mechanical signalisation.
ELR-3E
The ELR-3E, maintain all the basic characteristics of the DIN 96x96 mm series, although its reduced dimensions.
ELR-7
Built in a flush mounting DIN 48x48 mm with a reduced depth of 72mm, including wiring terminals.
ELR-91 / ELR-92
This new series of relays, flush mounting according to DIN 72x72mm, on top of granting a high reliability level.
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RGU-10 / CBS-4 Family. Inteligent protection
RGU-10
-Instant current leakage and pre-alarm display
- Type A super-immunized earth-leakage protection, suitable for the new industrial environment
- High frequency current filtering
- Programmable sensitivity and delay times
- Small size. Just 3 modules
- 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
- 4 RGU-10 in one single equipment
- Small size. Just 3 modules
- Reduces occupied space and wiring time
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7SD5 relay provides full scheme differential protection and incorporates all functions usually required for the protection of power lines. It is designed for all power and distribution levels and protects lines with two up to six line ends, to provide high-speed and phase-selective fault clearance.
Application
Differential protection with phase-segregated measurement
Sensitive measuring stage for high-resistance faults
Non-switched distance protection with 6 measuring systems
High resistance ground (earth)-fault protection for 1 and 3-pole tripping
Phase-selective intertripping
Tele (pilot) protection
Weak-infeed protection
Fault locator
Power swing detection/tripping
3-stage overcurrent protection
STUB bus protection
Switch-onto-fault protection
Over/undervoltage protection
Over/underfrequency protection
Auto-reclosure
Synchro-check
Breaker failure protection
Overload protection
Lockout function
Digital communication via
fiber-optic cables
digital communication networks
pilot wires or ISDN connections |
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