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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 A-ISOMETER® of the IR420 series is designed to monitor the insulation resistance of AC control circuits (IT systems) 0...300 V. If the systems to be monitored include DC components, such as switched-mode power supplies or solenoid valves, the display and operating characteristics may be affected.
The display and response values apply to pure AC systems. An external supply voltage allows de-energized systems to be monitored too.
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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, 1½-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 1½ 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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MIB High Impedance Busbar Differential Relay
MIB High Impedance Busbar Differential Relay
The MIB, a member of the M II family of economical and highly functional digital protection relays, is a microprocessor based relay that provides three phase high impedance differential protection for Substation Bus-bars of any voltage level.
Use the MIB also to protect electrical machines like transformers, generators or motors against restricted earth faults.
Basic protection functions features include a high impedance differential protection unit with a tripping time of 1 1/2 cycles. Stability against external faults is guaranteed thanks to the use of a stabilizing resistor. The unit includes a set of MOVs (Metal Oxide Varistors) provided to clamp the secondary peak voltage below 2kV during fault conditions.
The relay includes open CT detection which provides an alarm when it detects sustained current unbalance conditions, issuing a warning signal and blocking the operation of the unit.
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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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High-performance protection relays for the protection of distribution systems and HV/MV substations
Description
Range of digital protection relays, ready-to-use, providing all the functions required by an application:
complete protection against internal transformer faults
restricted earth fault protection included
simple implementation due to the use of neural networks
metering
alarms and indication
control monitoring and diagnosis
communication
Two applications:
D32:three-winding differential protection for public and industrial distribution network.
D31: three-winding differential protection for HV/MV substations.
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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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The Current Protection Relay (IPR-A) has been designed to measure the line and ground RMS currents under normal conditions or under disturbances. The current signals are sensed throughout current transformers (CT) from each line. This information is internally processed by the microprocessor, to take the current protection actions defined under ANSI, IAC or IEC standard. The different functions provided by the IPR-A may be classified into the following groups:
Applications:
* Primary and backup protection for power plants, utility and industrial distribution systems.
* Protection of transformers, overhead lines, cables and generators.
* Permits the opening of the switch/disconnector within the limits of its capacity, those identifying the excess (e.g. straight short-circuits), leaving the circuit interruption to the back-up fuses.
Protection:
* CT primary ratio selectable in 5 amp steps (10 A to 5000 A).
* Inverse time phase overcurrent (ANSI 51) and inverse time ground overcurrent (ANSI 51N/51G), with selection of curves according to ANSI, IAC or IEC/BS142, as follows:
Moderately inverse.
Standard inverse.
Very inverse.
Extremely inverse.
Definite time.
* Instantaneous overcurrent (ANSI 50).
* Instantaneous ground overcurrent (ANSI 50N/50G).
* Overload alarm adjustment to one level.
* Accumulated KA per phase on breaker interruption.
* 1 trip relay and 1 alarm relay.
* Loss of control volts relay.
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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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The MGC1000 are microprocessor based, digital type, generator protection relays which provide thermal protection for three phase generators, phase fault, ground fault, and unbalanced current protection.
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Designed for positioning on Rail embedded DIN or, of reduced to dimensions, used for protection of machines and electrical systems against surges, sobreintensities, variations of frequency…
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SIPROTEC 7RW600 is a numerical, multifunction relay for connection to voltage transformers. It can be used in distribution systems, on transformers and for electrical machines. If it detects any deviation from the permitted voltage, frequency or overexcitation values, it responds according to the values set.
SIPROTEC 7RW600 can be used for the purposes of system decoupling and for load shedding if ever there is a risk of a system collapse as a result of inadmissibly large frequency drops. Voltage and frequency thresholds can also be monitored.
This voltage, frequency and overexcitation relay can be used to protect generators and transformers in the event of defective voltage control, of defective frequency control, or of full load rejection, or furthermore islanding generation systems.
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The Voltage Protection Relay (VPR-A) has been designed to measure the line or phase RMS voltages under normal conditions or under disturbances. This information is internally processed by the microprocessor, to take the voltage protection actions defined under ANSI or IEC standards. The different functions provided by the VPR-A may be classified into the following groups:
Applications:
* Protection of generators, motors and transformers against adverse system voltage conditions.
* Supervision of automatic transfer switching schemes.
Protection:
* Selection of protection curves a definite time.
* Timed and instantaneous undervoltage (ANSI 27t/27i).
* Residual undervoltage (ANSI 27r).
* Timed and instantaneous overvoltage (ANSI 59t/59i).
* Homopolar overvoltage (ANSI 59N).
* Voltage unbalance (ANSI 46).
* Overfrequency and underfrequency (ANSI 81).
* Phase reversal (ANSI 47).
* Five (5) output relay programmable.
* Loss of control volts relay.
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The SIPROTEC 4 7SA6 distance protection relay for all voltage levels is a universal device for protection, control and automation on the basis of the SIPROTEC 4 system. Its high level of flexibility makes it suitable to be implemented at all voltage levels between 5 to 765 kV. With this relay you are ideally equipped for the future: it offers security of investment and also saves on operating costs.
• High-speed tripping time
• Low-impedance setpoints to protect also very short lines
• Self-setting power swing detection for frequencies up to 7 Hz
• Current transformer saturation detector ensures fast tripping and highest distance measurement accuracy
• Phase-segregated teleprotection for improved selectivity and availability
• Digital relay-to-relay communication by means of an integrated serial protection data interface
• Adaptive auto-reclosure (ADT)
One of the communication interfaces is system interface for connecting to a control system via IEC 61850 Ethernet protocol.
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SIPROTEC 7SS52 numerical protection is a selective, reliable and fast protection for busbar faults and breaker failure in medium, high and extra-high voltage substations with various possible busbar configurations.
The protection is suitable for all switchgear types with iron-core or linearized current transformers. The short tripping time is especially advantageous for applications with high fault levels or where fast fault clearance is required for power system stability.
The modular hardware allows the protection to be optimally matched to the busbar configuration. The decentralized arrangement allows the cabling costs in the substation to be drastically reduced. The 7SS52 busbar protection caters for single, double or triple busbar systems with or without and quadruple busbar systems without transfer bus with up to: 48 bays, 16 bus couplers, and 24 sectionalizing isolators and 12 busbar sections.
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he Summarize Measurement and Protection Unit (SMPR-1) has been designed to measure the line and ground RMS currents and supply RMS voltages under normal conditions or under disturbances. The voltage and current signals are sensed throughout potential transformers (PT) and current transformers (CT) from each line. This information is internally processed by the microprocessor, to take the current protection actions defined under ANSI, IAC or IEC standard. Additionally the operational conditions of the breaker or disconnector are also signalized. The different functions provided by the SMPR-1 may be classified into the following groups:
Applications:
* Primary and backup protection for power plants, utility and industrial distribution systems.
* Protection of transformers, overhead lines, cables and generators.
* Permits the opening of the switch/disconnector within the limits of its capacity, those identifying the excess (e.g. straight short-circuits), leaving the circuit interruption to the back-up fuses.
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G60 Generator Protection System
The G60 Generator Management Relay, part of the UR family of protective relays, is a microprocessor-based relay intended for the protection of AC generators. It may be used on any size of generator driven by steam, gas and hydraulic turbine.
Protection functions include stator differential, 3rd harmonic stator ground differential and 3rd harmonic neutral undervoltage for 100% stator ground differential protection, sensitive directional power for low forward power and reverse power protection, loss of excitation, inadvertent energization, overexcitation, current unbalance, out-of-step, and a whole suite of under- and overvoltage, and overcurrent functions.
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The SIPROTEC 4 7SA522 is a distance protection relay for transmission lines. This relay provides full-scheme distance protection and incorporates all functions usually required for the protection of a power line. The relay is designed to provide fast and selective fault clearance on transmission and subtransmission cables and overhead lines with or without series capacitor compensation. The power system star point can be solid or resistance grounded (earthed), resonant-earthed via Peterson coil or isolated. The 7SA522 is suitable for single-pole and three-pole tripping applications with and without tele (pilot) protection schemes.
The 7SA522 incorporates several protective functions usually required for transmission line protection.
• High-speed tripping time
• Suitable for cables and overhead lines with or without series capacitor compensation
• Self-setting power swing detection for frequencies up to 7 Hz
• Digital relay-to-relay communication for two and three terminal topologies
• Adaptive auto-reclosure (ADT)
One of the communication interfaces is system interface for connecting to a control system via IEC 61850 Ethernet protocol.
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239 Motor Protection Relay
239 Motor Protection Relay
The 239 relay is designed to fully protect three phase AC motors against conditions which can cause damage. In addition to motor protection, the relay has features that can protect associated mechanical equipment, give an alarm before damage results from a process malfunction, diagnose problems after a fault and allow verification of correct relay operation during routine maintenance.
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Designed for medium-sized motors, the enhanced 369 Motor Protection System delivers advanced motor health diagnostics, graphical and data rich fault diagnostics, simple six-step setup & configuration and complete traceability of setting changes, enabling industrial facilities to maximize process up-time and optimize rated motor output.
- Motor Settings Auto-Configurator - automatically generate a complete settings file, eliminating the need to manually program hundreds of individual protection settings
- Enhanced Faceplate (E Option) - Improved LCD display with 40 easily visible characters and increased viewing angle
- Motor Health Report (E Option) - "See" how the motor is operating with comprehensive graphs and tables
- Enhanced Motor Learned Data (E Option) - Capture up to 250 sets of motor starting values to learn the starting characteristics of each motor
- Security / Change History Report (E Option) - Patented Security / Change History Report provides complete traceability of all settings changes
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LS overload relays are designed for the easy mounting directly to contactors or separately by using additional bases or brackets.
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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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The SIPROTEC 4 7UM61 and 7UM62 protection relays can do more than just protect. They also offer numerous additional functions. Be it earth faults, short-circuits, overloads, overvoltage, overfrequency or underfrequency asynchronous conditions, protection relays assure continued operation of power stations. They are compact units which has been specially developed and designed for the protection of small, medium-sized and large generators.
They integrate all the necessary protection functions and are particularly suited for the protection of:
• Hydro and pumped-storage generators
• Co-generation stations
• Private power stations using regenerative energy sources such as wind or biogases
• Diesel generator stations
• Gas-turbine power stations
• Industrial power stations
• Conventional steam power stations.
The combination of functions incorporated in the 7UM62 also offers excellent all-round protection for transformers, large asynchronous motors, synchronous motors.
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The SIPROTEC 7SJ602 is a numerical overcurrent relay which, in addition to its primary use in radial distribution networks and motor protection, can also be employed as backup for feeder, transformer and generator differential protection. It provides definite-time and inverse-time overcurrent protection along with overload and negative-sequence protection for a very comprehensive relay package. In this way, equipment such as motors can be protected against asymmetric and excessive loading.
Feeder protection
• Overcurrent-time protection
• Sensitive earth-fault detection
• Directional sensitive earth-fault detection
• Displacement voltage
• Disk emulation
• Overload protection
• Breaker failure protection
• Negative-sequence protection
• Cold load pickup
• Auto-reclosure
• Trip circuit supervision
Motor protection
• Starting time supervision
• Locked rotor
• Restart inhibit
• Undercurrent monitoring
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The TS (TrafoSTART) is an electronic relay for the switching single-phase transformers. The magnetization of the transformer core is maintained in limits during energization. This transformer starting method totally eliminates inrush current with minimal start up time (from 0,06 s). The TrafoSTART is suitable for all kinds of transformers – EI, UI, C, toroidal, at al. Parallel connected transformers of different types can be connected to one TrafoSTART. The TrafoSTART is recommended for frequently switched transformers and for low-losses transformers with high working induction. The device is easily installed into the primary lead. The TrafoSTART can replace transformer contactor, when control input is used.
During startup, the transformer core is re-magnetized to opposite value of magnetization with exactly specified increment in each half period of the supply voltage. Magnetizing impulses are revised according to the primary voltage waveform. Such a principle ensures error-free operation without any transformer secondary load.
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The DTP-B is a digital relay that provides high-speed differential and backup instantaneous differential three phase protection functions for power transformers. Different models of the DTP are available for protecting and monitoring transformers with two, three or four windings.
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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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