Relays #105475

We are offering bus protection relay.B-pro 8700 provides bus and substation differential protection (low impedance) with ct saturation security, integrated breaker failure and overcurrent protection with, dfr quality fault oscillography and dynamic swing recording, sequence of events logging, scada control and metering in a fully integrated protective relay solution.

We are offering sub harmonic protection relay.S-pro 4000 is a digital, microprocessor-based sub-harmonic protection system that provides comprehensive sub-harmonic protection for transmission lines at any voltage level, particularly those with serial compensation and interconnected with wind farms. Use the s-pro sub-harmonic protection relay for monitoring and protection of uncontrolled sub-harmonics, ensuring a reliable operation of the power grid.

S-PRO 4000is a digital, microprocessor-based sub-harmonic protection system that provides comprehensive sub-harmonic protection for transmission lines at any voltage level, particularly those with serial compensation and interconnected with wind farms. Use the S-PRO Sub-Harmonic Protection Relay for monitoring and protection of uncontrolled sub-harmonics, ensuring a reliable operation of the power grid.
Undamped sub-harmonic current oscillations created by series capacitors interacting with the wind system can cause serious damage to wind turbine controllers and also to conventional generators. The wind turbine's own mechanical system interactions (tower-to-blade) can also generate sub-harmonics, which are detrimental to induction generators, transformers, and may cause resonance at the point of common coupling in the electrical grid.
The S-PRO 4000 relay detects these sub harmonic oscillations and allows the utility to monitor and protect the power system by isolating the healthy grid from sub-harmonic generation sources.

Protect against sustained sub-harmonics in wind farm operations

Undamped sub-harmonic current oscillations created by series capacitors interacting with the wind system can cause serious damage to wind turbine controllers and also to conventional generators. The wind turbine's own mechanical system interactions (tower-to-blade) can also generate sub-harmonics, which are detrimental to induction generators, transformers, and may cause resonance at the point of common coupling in the electrical grid.
The S-PRO 4000 relay detects these sub harmonic oscillations and allows the utility to monitor and protect the power system by isolating the healthy grid from sub-harmonic generation sources.

Features and Benefits

• Built on a contemporary new substation hardened hardware platform and powered by a state-of-the-art processor
• Protects the grid from sub harmonic oscillations at the point-of-common-coupling every 1 second, with additional user-configurable delays
• Provides real time processing of voltage and current signals, comprehensive sub-harmonic protection, with sub-harmonic monitoring for each frequency in the range from 5 Hz to 40 Hz
• Flexible Communications
  • State-of-the-art communications (2 rear ports, 100BASE-TX RJ-45 or 100BASE-FX 1300 nm multimode optical with ST style connector to accommodate the industrys latest network-based communications)
  • Ethernet ports with 2 unique MAC addresses that easily accommodate network access security needs
  • Front panel USB and 100BASE-TX RJ-45 Ethernet port interfaces (readily accommodate modern standard laptops)
• Reduced Cost
  • Product setting time 240 x 128 LCD graphical user interface provides convenient means to check/change specific settings and parameters
• Improved Overall Response Time
  • Expedited response to systems events (11 generic front panel LEDs can be mapped to internal elements) allowing operators to quickly identify the cause of system events

Easy to Use

• Flexible programmable logic for building customized schemes with ProLogic statements 24 control logic statements (total of 192 statements)
• User-friendly, Windows-based relay setting and record analysis software
• Enhanced DNP3.0 Level 2 SCADA communication protocol including user-selectable point lists, class support and multiple master station support
• Exceptional fault recording capabilities with 96 s/cycle, all channels with events (best combination of waveform accuracy and file size)

Application

• Sub-harmonic protection for transmission lines, particularly those with serial compensation and interconnected with wind farms
• Single and multi breaker applications

MJT 315over current relay combines the power and flexibility of microprocessor technology with decades of experience in the field of protection. A wide range of protection elements and characteristics are supplemented by advance features such as metering, fault recorder and communication. MJT 315 offers inverse time and definite time over current protection for phase fault and earth fault with communication.

Application

• Distribution Feeders
• Transmission lines
• AC machines
• Capacitor banks
• Transformers

MJT 314B(Self powered numerical over current protection) &MJT 314C(Self powered with series trip numerical over current protection) relay combines the power and flexibility of microprocessor technology with decades of experience in the field of protection. A wide range of protection elements and characteristics are supplemented by advance features such as metering, fault recorder and communication. MJT 314 (B&C) offers inverse time and definite time over current protection for phase fault and earth fault with communication Application Distribution Feeders Transmission lines AC machines Capacitor banks Transformers Used in Compact MV Switch boards with CB Where Auxiliary Voltage is not available or guaranteed

ARGUS 7is a combined check and system synchronising relay which can automatically select check or system synchronise from measurements of the relative phase angles between line and bus voltages. The relay will prevent closure of the circuit breaker if either the phase angle, slip frequency or the voltage magnitude of the incoming and running voltages fall outside prescribed limits.
If the parameters are within the limits the relay will issue an output which can be used to close the circuit breaker directly or in conjunction with an autoreclose scheme. Both the check and system synchronise functions have independent settings and blocking features. The relay includes split system detection with a variable time delay, which can be used for blocking purposes within delayed autoreclose schemes.
Synchronising bypass logic is provided to connect a dead line or bus to a live line or bus. For manual synchronising the relay includes a circuit breaker close guard feature which is used to prevent the control switch being held closed during a synchronising operation. This feature is implemented using internal logic and removes the need for an external relay.

Application

• Check-synchronizing
• System-synchronizing

the relay is suitable up to four shots. It consists of four cards viz.front fascia, power supply status input & output card and micro controller card are housed in a compact 3n non draw-out case. micro controller does the sequence control and timing function. The dip switches on the relay front fascia select different operating functions and time setting.there is a watchdog timer in the relay which continuously monitors the program, put off ^power on^ led indication if the watch dog timer elapses. to start an auto re close cycle, the initiating contact from the protective relay must be closed without chatter for at least 12 milliseconds. inputs:two optically isolated inputs are provided. One is used to take the three phase protection operated contact inputs to initiate the auto rec lose relay. the another input is used to block the re close functions if the external blocking input is initiated. reclose timer:the relay has four re-close timers. The relay selects the respective timer sequentially depending upon the number of re-close selection and the re-close initiation. reclaim timer:there is the common reclaim timer. It operates in series with the re-close timers. The over all reclaim time delay from the relay initiation to relay reset is therefore reclaim timer setting plus re-close time. For every initiation the reclaim time counting are resets automatically. lockout function:when the number of shots switch is in off mode the protection operated contact input initiation condition it will energize the lockout relay and lockout led indication and it blocks the re-close function. when the external blocking input is initiated, the re-close function is blocked and it energize external blocking led, lockout led and lockout relay. as the relay allows the maximum of four re-close depending upon the number of shots selection, the number of shots is less than the number of initiation within the reclaim time it will energize the lockout relay and its led indication.

ARGUS 8range of numerical voltage and frequency relays have the power and flexibility of microprocessor technology, giving a wide range of settings which are supplemented by advanced features such as metering, data storage and Fibre-Optic communications. Supervisory and self-monitoring features give added confidence to the user as well as reduced maintenance and down time. A menu-based interface gives user friendly access to relay settings, meters and operational data Application Capacitor banks Ungrounded/ High impedance earthed systems AC generators Transmission lines Distribution feeders

MVT 181is a numerical true RMS single pole relay consists of two elements. Each element can be selected for under voltage function or over voltage function or switched off. The characteristics setting, voltage setting and time multiplier setting are independently settable for each element and the voltage setting is in terms of voltage. Hence this relay can be used as a two stage under voltage or two stage over voltage protection. Multiple Characteristics:There are four operating characteristics for over voltage function and two operating characteristics for under voltage function. Overvoltage Characteristics: Definite Time Lag (DTL)Long Time Inverse (LTI)Extremely Inverse 1(El 1)Extremely Inverse 2(El 2) Undervoltage Characteristics: Definite Time Lag (DTL)Extremely Inverse 1(El 1) Two elements:Two stage O/V Two stage U/V Or one O/V and one U/V Timer:The relay is provided with two status inputs, one of which is to be connected across the circuit breaker auxiliary contact 52a. From this the circuit breaker closed or opened condition is found out. This information is used to introduce a time delay between successive switching of the capacitor banks which allows the capacitor bank to discharge to a safer value after disconnected from a live network. This timer function is a settable one and its output (N/O) contact is used in the closing circuit of the circuit breaker. The completion of this time delay is also indicated by ^TIMER^ LED in the front fascia. In addition the same status input can be used for Trip circuit supervision also. During other under voltage and over voltage applications this timer function can be disabled or used as an independent timer function. Trip Circuit Supervision:Pre-closing and post-closing supervision of the trip circuit and trip supply is possible with this relay. A low value of DC current is passed through the entire trip circuit to monitor the trip coil, its auxiliary switch and the associated wiring. One of the status input is connected across the tripping contact and another status input is connected across the 52a contact (auxiliary contact of the circuit breaker) in series with the trip coil. During trip circuit fail condition the monitoring current flow ceases and the energised status input drops off and the relay gives a contact output to indicate this condition. In addition to this contact an LED is provided in the front fascia to indicate the ^T.C. FAIL^ condition. A time delay of approximately 400 msecs has been given to avoid false trip circuit fail indication at the time of normal tripping. Thus trip circuit supervision is the integral part of the relay. If this function is not required the same can be put off in the setting menu.

MBT 191relay can be connected either in phase -phase or phase - neutral PT secondary circuit. Nominal voltage which is settable (50 -150 V) in the relay could be chosen according to the connection. And the nominal frequency is settable either as 50 or 60 HZ.

Two Elements:MBT 191 relay consists of two elements. Each element can be independently put off or set to a wide range of overfluxing setting (b1 and b2). Both elements are having definite time characteristics and four types of inverse characteristics. Each element is provided with two numbers of ^N/O^ contacts independent to each other.Both elements can be selected appropriately to give two stages of protection for the equipment. In addition to these two elements, starting function of these elements are indicated by a starter LED and a changeover contact is available for annunciation.

Multiple Characteristics:Both elements are provided with definite time characteristics (DTL) and four types of inverse characteristics.

Cooling Time Delay:This relay also has resetting time feature. After trip occurs due to over fluxing, till the resetting time delay (which is settable in the relay) the starter indication will be on and the relay cannot be reset. Only after resetting the relay the breaker has to be closed again. This feature gives enough cooling time, which is necessary to cool the equipment when any over-excitation occurs and before it is restored again into the operation.

Application

• Power Transformers
• AC generators

Features

Both DC & AC auxiliary supply available
Drawout modular case (150X151mm cutout ) Compact design

We are offering high speed tripping relay.Tr relays are a range of voltage operated, multi-contact, attracted-armature relays, complying with the appropriate requirements of iec 60255. A wide range of models is available to meet the requirements of the electrical power sector.

each pole of the relay is phase segregated and operates independently via its level detector and interface area. The provision of the interface area allows for the factory fitting of output relays to the customer's requirements. With this flexibility the interface area relays can be manufactured with up to 9 change-over contacts, connected as phase segregated groups of three, or as three phase outputs. The standard arrangement is with 4 normally open output contacts.

each level detector initiates a time delay, set by the user, which delays operation of the output relay. This can be set to zero for instantaneous operation.

standard features

low burdenc high speed pick-up and drop-off modular design

MDDARelay consists of a power supply unit, a timer unit and an attracted armature auxiliary relay. Resistor and Zener diode combination of the power supply unit provides low voltage stabilised DC supply to the static timer circuit. Non-linear resistors are used in the power supply unit for surge suppression.

The timer unit consists of a timer circuit and a thumb wheel switch. The thumb wheel switch mounted on the name plate of the relay provides precise and high resolution time setting. The timer unit operates a reed relay which in turn energises an attracted armature auxiliary relay. This auxiliary relay is provided to achieve higher contact rating and flag indication, if required. MDDA can be provided either as a delay on pick up relay or as a delay on drop-off relay.

A normally open contact is used for initiating time delay on pick up relay and output element gets energised after the set time delay. In the case of delay on drop off relay, the output element is normally energised and with the normally closed initiating contact opening out, the output elements gets de-energised after the set time delay.

The relay comprises an attracted armature element fed via a rectifier and series resistor. It can be provided with either a fixed setting, or variable settings using a plug bridge. It has a minimum withstand of rated voltage continuously.

It consists of a low impedence coil, metal rectifier and load resistance in each phase. During normal condition the relay coil is shorted with the fuse. Once the fuse blows, current flows through the relay and it operates. The load resistance 1K will come into picture when the system is lightly loaded.

The single-phase overvoltage relay basically comprises a tapped input transformer fitted with a plug-bridge, a potentiometer, a level-detector and a dry-reed repeat element. When the relay setting is exceeded, the level detector triggers and so energizes the repeat element.

The single-phase undervoltage relay is similar to the above but is maintained operated and .drops off. when the monitored voltage falls below the relay setting.The three-phase relays comprise of three of the above elements.

We are offering numerical multi function relays.Rho 3 is used for protection and management of medium and large motors and driven equipmentit is ideally suited for pumps, conveyors, compressors, fans etc. standard features thermal overload protection (49) short circuit protection (50)earth fault protection (50n) stall and locked rotor protection (48)phase unbalance protection (46) undercurrent detection (37)optional 8 thermistor or resistance temperature detector (rtd) inputs restart inhibit protectionlimitation of number of starts upto 9 programmable digital inputs & upto 7 programmable output contactstrip circuit supervision (95) ct supervisionlcd display communication protocol compatible with iec 60870-5-103 or modbus rtufiber-optic rs485 communication port

RHO 3is used for protection and management of medium and large motors and driven equipmentIt is Ideally suited for pumps, conveyors, compressors, fans etc.

Standard Features

Thermal overload protection (49)

Earth fault Protection (50N) Phase unbalance protection (46)

XRrelay has been developed for specific applications, and suitable for use with type AR relay range. It is an electro-mechanical relay with a consistent positive action, a long service life and complying with the appropriate requirements of IEC 60255. The XR351 has three attracted armature elements. It incorporates a time delay on de-energisation, to keep the relay in an operated condition, during temporary reduction in the battery voltage.

Features

Low burden Preclose supervision

The IEC 61850 station bus embeddedT-PROrelay provides complete three phase multi-winding transformer protection and overload protection, DFR-quality fault oscillography, fault logging, sequence of event logging, trend recording and integrated with advanced communications in a flexible, cost effective package.

The T-PRO can be applied on system for high speed protection and complete control of multi-winding transformers with the HV and LV windings connected to all bus types such as ring bus or breaker-and-half arrangements.

Applications

• Primary and backup protection and management of small, medium and large power transformers, as well as reactors.

• Applicable for transformers installed in sub-stations with all type of bus bar arrangements; ring bus or breaker-and-half configuration.

Features and Benefits

Easy to Use

• Easy-to-use, install and maintain
• Easy to order - no complex product codes
• User-friendly, Windows based relay setting and record analysis software
• Setting software tool - relay specific application
• On Line setting tool
• Flexible programmable logic for building customized Schemes with ProLogic statements - 24 control Logic statements (total of 192 statements)

Reduced Installation and Operation Cost

• Substation automation cost - includes IEC 61850 protocol along with PRP (Optional) to display and transfer operational data via LAN / DAN for local HMI and wide-area network (WAN) for remote monitoring SCADA
• Engineering, installation and commissioning cost - IEC 61850 GOOSE messages communicate high-speed information between IEDs on the substation LAN / DAN
• Product setting time - 128 X 64 LCD graphical user interface provides convenient means to verify / change specific settings and parameters
• Front panel indicators - 18 user-configurable LEDs, and Fixed 4 LEDs - Relay Functional, IRIG-B Functional, Service Required, Test Mode.

Flexible Communications

• 100BASE-TX RJ-45 or 100BASE-FX 1300nm multimode Optical with ST style connector
• Ethernet ports with PRP compliant (Optional)
• Front panel USB interface

Substation Automation - Ethernet Ready

• Standard IEC61850 Station Bus & Optional PRP (IEC 62439-3) on a dedicated Optical / Copper Ethernet port
• Enhanced DNP3 SCADA communication protocol including user
• Selectable point lists, class support and multiple master stations Support
• Modbus SCADA communication protocol
• 30 Virtual Inputs for local and remote control

Multi-Functional Recording and Event Logging

• Exceptional fault recording capabilities (with 128 samples/cycle)
• User selectable pre-fault and total record length of maximum 10seconds/record with a total memory of 150seconds, records can have a combination of transient /event & trend records.
• Continuous, slow-speed trend recording of the transformer and its Characteristics with an adjustable sample period from 3 to 60 Minutes/sample
• Metering functions for each input connection
• Sequence of event recorder - 250 events with 1 ms resolution (a compressed sequence of event file is created approximately every 230 events)

L-PROprovides easy to use, state of the art comprehensive distance and backup directional line protection for all voltages including Extra High Voltage transmission lines using communication based schemes. It provides control, automation, metering, monitoring, DFR-quality fault oscillography, dynamic swing recording, fault logging, sequence of event logging with advanced communication features in a flexible, cost effective package

Applications

• Suitable for Overhead lines and underground cables (using pilot protection schemes)
• Backup protection for generators, transformers and reactors
• Ideal for multi-circuit line applications (to monitor mutual coupling via additional CT inputs)
• Suitable for Series Compensated Lines

Features and Benefits

Easy to use

• Easy-to-use, install and maintain
• Easy to order - no complex product codes
• User-friendly, Windows based relay setting and record analysis software
• Setting software tool - relay specific application
• On Line setting tool
• Flexible programmable logi for building custmized sches with ProLogic statements - 24 control Logic statements (total of 192 statements)

Reduced Installation and Operation Cost

• Substation automation cost - includes IEC 61850 protocol along with Optional PRP to display and transfer operational data via LAN/DAN for local HMI and wide-area network(WAN) for remote monitoring SCADA
• Engineering, installation and commissioning cost - IEC 61850 GOOSE messages communicate high-speed information between IEDs on the substation LAN/DAN
• Product setting time - 128 X 64 LCD graphical user interface provides convenient means to verify / change specific settings and parameters
• Front panel indicators - 18 user-configurable LEDs, and Fixed 4 LEDs - Relay Functional, IRIG-B Functional, Service Required, Test Mode