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| The device that maintains continuous power supply even on the absence of mains power supply is called UPS or Uninterrupted power supply. This is usually connected between the main source and the working system. It switches from the mains power supply to the battery power instantaneously whenever there is a fault in the mains power supply or the power supply is not there at all. It is generally used to protect typically computers, telecommunications equipment, and other electrical equipment where there is a chance of power failure. UPS are available from 200VA onwards to large systems which can support the power supply of multistoried buildings. It is typically the need of all data centers, and computer network systems. Sometimes in large systems it is used in conjunction with generators but it is not to be confused with standby generators. UPS are used for short and instantaneous power supply needs though for longer terms it may be used with a generator. |
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UPSs
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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, 1ฝ-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 1ฝ 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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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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SIPROTECฎ 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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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 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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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 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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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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Multifunction Protection Relay SIPROTEC 4 7SJ61/62/63/64
The SIPROTEC 4 units are numerical protection relay that also performs control and monitoring functions and therefore supports the user in cost-effective power system management, and ensures reliable supply of electric power to the customers. Local operation has been designed according to ergonomic criteria. A large, easy-to-read graphic display was a major design aim.
Protection functions
Time-overcurrent protection
Directional time-overcurrent protection
Sensitive dir./non-dir. earth-fault detection
Displacement voltage
Intermittent earth-fault protection
High-impedance restricted earth fault
Inrush restraint
Motor protection
Overload protection
Temperature monitoring
Under-/overvoltage protection
Under-/overfrequency protection
Rate-of-frequency-change protection
Power protection (e.g. reverse, factor)
Breaker failure protection
Negative-sequence protection
Phase-sequence monitoring
Synchronization
Auto-reclosure
Fault locator
Lockout
Feature: IEC 61850 |
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7PA30 single phase is for the supervision of the trip circuit of a circuit breaker with one trip coil. While 7PA30 three phase is for the supervision of the trip circuit of a circuit breaker with three selective trip coils.
The trip circuit wiring is supervised from the positive supply to the negative supply whilst the circuit breaker is open or closed.
The design, quality and rugged construction of the relay make it suitable for applications requiring high levels of reliability/dependability.
The high degree of protection guarantees reliable operation over a wide temperature range, even under extreme environmental conditions. The relay has been tested in accordance with IEC, EN and IEEE standards. The relay is CE marked.
The supervision current is always less than 1,4mA thus avoiding unwanted operation of the trip coil. Correct operation is shown via a green LED. |
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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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Two versions, mini and industrial
Ratings from:
- Mini from 0.11 - 14amps in 16 sizes
- Industrial from 0.16 - 850amps
Ambient temperature compensating
Single phase preventing
Manual or Automatic resetting
Trip test indication
Selectable manual or automatic reset with or without stop feature (industrial only)
Direct contactor connecting or independent mounting
Separate trip and alarm contacts
Trip Class 10, 10a, 20 and 30
Accessories for industrial relays:
Remote electrical reset device
Terminal protection covers
Remote cable reset devices |
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7PA22 and 7PA23 are fast-acting lockout relay with eight changeover contacts and four changeover contacts, respectively.
Due to their quality, reliability and design, these relays are optimal for applications requiring high reliability and availability such as power stations, substations, railway and industrial plants. Typical examples include petrochemical industry, chemical industry, cement industry, rolling mills etc.
The relays comply with the IEC, EN, IEEE standards (type and routine test) and bear the CE mark.
The robust switch contacts are characterized by high make/break capacity, overload capability and continuous current intensity capacity; thus perfect insulation is obtained. Direct control of high-voltage and medium-voltage switchgear is possible. Their high degree of protection and the transparent cover ensure reliable operation in tropical and/or salty sea air ambient conditions. |
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7PA27 is monostable fast-acting relay with four changeover contacts.
The design, durability and quality of these relays guarantee their application in high responsibility controls such as power stations, substations, railway, industries of continuous processes (petrochemical, rolling mills, cement and chemical industries), etc.
The relay has been tested in accordance with IEC,EN and IEEE standards. The relay is CE marked. The great power of the output contacts allows direct action on HV and MV switchgear, because of its making/breaking capacities, high permanent current and overvoltage capacity. |
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Relays
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All measured values in any desired power supply system can be measured with one single unit, the SIMEAS T. The unit possesses 3 electrically isolated analog outputs, one binary output, as well as a RS232 or RS485 serial interface.
Any desired measured value (current, voltage, active power, frequency, etc.) can be assigned to each of the 3 analog outputs, as well as any desired measuring range.
The output signal (e.g. ฑ 20mA, 4 to 20 A, etc.) can be freely parameterized for every output. The binary output can be used as a kWh meter to register the energy or as a limit monitor. Input currents up to max. 10 A or input voltages up to 600 V with rated frequencies of 50, 60 or 16 2/3 Hz can be connected.
Features:
Smallest size
Short delivery times, from stock
CE mark
EMC interference immunity
Satisfies relevant international standards
High quality, long life
Electrical isolation with high test voltage
High measuring accuracy
Real rms measurement
Powerful output signal circuits
One unit for all applications
All data freely parameterizable
High plant security and reliability
Very easy servicing |
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| GE offers a complete product range combining high operational safety with high technical characteristics. |
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| ... products without technical information |
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| The "Record Plus" family of circuit breakers has been developed as a line of aesthetically and technically coordinated protection devices for LV distribution and control applications. |
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RCCB Record Plus: FD63/160 frame size
Rated at 160A, the FD63/160 frame size is designed for use in both a DIN-rail environment with modular equipment and in industrial applications. It is supplied with IPXXB terminals suitable for direct connection of one or two conductors totalling up to 95 mmฒ and is available as a thermal-magnetic breaker, a moulded case switch, and as a magnetic-only motor circuit protector.
The FD63/160 bridges the gap between residential miniature circuit breakers and industrial moulded case circuit breakers.
In compliance with EN 60947, BS, VDE, UTE, KEMA, CEI
3 and 4 pole versions available
FD63 to 63A and FD160 to 160A
Full range of add-on accessories, including:
thermal magnetic/magnetic trip units
auxiliary contacts
completely integrated add-on devices available
rotary handles
electrical operators
connectivity - 60 mm system
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Main features at a glance:
Reliable opening and closing
Proven contact and arc-quenching system
Consistent quenching performance with rated and short-circuit currents
even after many switching operations
Similar uncomplicated design for all voltages
High-performance, reliable operating mechanisms
Easy-to-actuate spring operatingmechanisms
Hydraulic operating mechanisms with on-line monitoring
Economy
Perfect finish
Simplified, quick installation process
Long maintenance intervals
High number of operating cycles
Long service life
Individual service
Close proximity to the customer
Order specific documentation
Solutions tailored to specific problems
After-sales service available promptly worldwide
The right qualifications
Expertise in all power supply matters
30 years of experience with SF6-insulated circuit breakers
A quality system certified to ISO 9001, covering development, manufacture, sales, installation and after-sales service
Test laboratories accredited to EN 45001 and PEHLA/STL |
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