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AVR Electronics Private Limited

Ganga Nagar, Bengaluru, Karnataka

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Protection Relays

Protection Meets Control

Woodward offers multifunction relays (MFR) which combine industrial-grade protection with synchronization and load share features. The MFR takes care of protecting your power sources like hydro generator sets or sets driven by turbines or reciprocating engines, in isolated or mains parallel applications. Generator protection and mains monitoring features are configurable. Load balancing between multiple power sources and mains connection through synchronization are possible by using speed and voltage bias outputs. 

The highly integrated protection packages with configurable alarm settings and remote control capabilities allow you to simply integrate the MFR into your system environment and to connect the controllers to your supervisory control and data acquisition (SCADA) system. The MFR products can be remote controlled to adapt protection and load flow schemes to your specific needs.+ Read More

Transformer Differential Protection (Product Details HighPROTEC MRDT4)
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The transformer differential protection relay MRDT4 is specifically tailored to the protection of two winding transformers. The device offers in addition to the differential protection various communication and backup protection functions. Furthermore the MRDT4 can also be used as a cost-optimized generator differential protection device, where it is even possible to have a step-up transformer integrated into the protection zone. The protection functions of the MRDT4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRDT4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRDT4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRDT4-2E or in the user manual MRDT4-3.6-EN-MAN) for a complete overview.

The transformer differential protection relay MRDT4 is specifically tailored to the protection of two winding transformers. The device offers in addition to the differential protection various communication and backup protection functions. Furthermore the MRDT4 can also be used as a cost-optimized generator differential protection device, where it is even possible to have a step-up transformer integrated into the protection zone. The protection functions of the MRDT4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRDT4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRDT4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRDT4-2E or in the user manual MRDT4-3.6-EN-MAN) for a complete overview.

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Voltage Relay (HIGHPROTEC MRU4)
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Relay TypeVoltage Relay

The voltage protection relay MRU4 provides precise and reliable protective functions and is very easy to operate. It is designed to protect electrical equipment from dangerous voltage fluctuations. For example protection against under voltages caused by mains shortcircuits, or overvoltages due to load shedding or failure of a generator voltage controller. Its compact design makes the MRU4 ideal for installation within the LV terminal compartments of compact SF6-insulated MV systems. The protection functions of the MRU4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRU4 is available in 48 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRU4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRU4-2E or in the user manual MRU4-3.6-EN-MAN) for a complete overview.

The voltage protection relay MRU4 provides precise and reliable protective functions and is very easy to operate. It is designed to protect electrical equipment from dangerous voltage fluctuations. For example protection against under voltages caused by mains shortcircuits, or overvoltages due to load shedding or failure of a generator voltage controller. Its compact design makes the MRU4 ideal for installation within the LV terminal compartments of compact SF6-insulated MV systems. The protection functions of the MRU4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRU4 is available in 48 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRU4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRU4-2E or in the user manual MRU4-3.6-EN-MAN) for a complete overview.

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Generator Differential (XD1G)
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Generator Differential Protection (ANSI 87G, 87M) for DIN rail mounting.
Easy to use Generator Differential Protection Relay. The relay can detect faults between stator windings, stator earth faults, ground faults and faults between phases outside the generator but within the protected zone, e.g. at the generator terminals or on the external connections.

The basic version of the relay can be extended even later by the addition of extra cards. By using a new method of evaluating current signals, the relay can determine whether C.T. saturation is due to internal or external faults and either trip or stabilize accordingly. Thus this extended relay (type XD1-G SAT) is particularily appropriate for:

  • Different sets of C.T.s
  • Retrofitting
  • Difficulty conditions
  • High-quality items to protect
  • High mains power
  • Motor feeders.

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Over- And Undervoltage Protection (XU2AC)
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100Vac, 110Vac, 230Vac, 400Vac (Rated voltage selectable via DIP settings). Settable Hysteresis 3, 6, 10%. Accuracy: Un = 100 V / 110 V / 230 V / 400 V 1% (phase to phase Voltage) and (phase to ground Voltage). Thermal capacity: Continuous 520 V ac. IEC 60255-1

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Residual Voltage (XU1E)
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Residual Voltage Protection - Detection of Earth Faults in isolated or high ohmic grids. Basic time delay accuracy = 0.5 % or ±25 ms. Accuracy of the specific rated values: 1 % at nominal frequency

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1A Power and Reverse Power (XP2R1)
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Measurement phase-to-neutral or phase-to-phase voltage. Tripping times for supervision P> and PR< adjustable.

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Transformer Differential Protection (HIGHPROTEC MCDTV4)
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The transformer differential protection relay MCDTV4 offers an all-in-one solution for HV, MV and LV transformers and it offers much more than just a differential protection package. Furthermore it can detect critical operation states based on voltage measurement (e.g. Overexcitation). The MCDTV4 provides in addition to that an Interconnection package. This can be used for mains protection at the point of common coupling (e.g. for directional reactive power undervoltage protection). The integrated backup protection package enables the MCDTV4 to act as backup protection (e.g. for downstream breakers). Additional features like demand management are available without extra charge. The protection functions of the MCDTV4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MCDTV4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MCDTV4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MCDTV4-2E or in the user manual MCDTV4-3.6-EN-MAN) for a complete overview.

The transformer differential protection relay MCDTV4 offers an all-in-one solution for HV, MV and LV transformers and it offers much more than just a differential protection package. Furthermore it can detect critical operation states based on voltage measurement (e.g. Overexcitation). The MCDTV4 provides in addition to that an Interconnection package. This can be used for mains protection at the point of common coupling (e.g. for directional reactive power undervoltage protection). The integrated backup protection package enables the MCDTV4 to act as backup protection (e.g. for downstream breakers). Additional features like demand management are available without extra charge. The protection functions of the MCDTV4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MCDTV4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MCDTV4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MCDTV4-2E or in the user manual MCDTV4-3.6-EN-MAN) for a complete overview.

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Motor Protection(HIGHPROTEC MRM4 )
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The MRM4 is a motor protection relay provides precise and reliable protective functions and is very easy to operate. The MRM4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current measurement. They supervise the motor start sequence (motor start), they detect a stall or locked rotor condition and they monitor the thermal condition of the motor. Overcurrent and earth overcurrent protection as well as unbalanced load protection are included in the protection package. The status and operation of the motor will also be monitored by means of the statistic and trend recorder. All important events and measuring values will be logged by means of the start, event, failure and disturbance recorder. The protection functions of the MRM4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRM4 is available in 192 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRM4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRM4-2E or in the user manual MRM4-3.6-EN-MAN) for a complete overview.

The MRM4 is a motor protection relay provides precise and reliable protective functions and is very easy to operate. The MRM4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current measurement. They supervise the motor start sequence (motor start), they detect a stall or locked rotor condition and they monitor the thermal condition of the motor. Overcurrent and earth overcurrent protection as well as unbalanced load protection are included in the protection package. The status and operation of the motor will also be monitored by means of the statistic and trend recorder. All important events and measuring values will be logged by means of the start, event, failure and disturbance recorder. The protection functions of the MRM4 have been adapted to comply with the requirements of the VDE???AR???N???4110:2018. The MRM4 is available in 192 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRM4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRM4-2E or in the user manual MRM4-3.6-EN-MAN) for a complete overview.

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Motor Protection (HIGHPROTEC MRMV4)
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The MRMV4 is a motor protection relay that provides precise and reliable protective functions and is very easy to operate. The MRMV4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current and voltage measurement and supervise all thermal conditions, motor start sequence, stall and locked rotor, undercurrent and incomplete sequence. Overcurrent functions and earth fault functions are also available as power protection, frequency and voltage elements. The motor operation can be monitored by statistic and trend recorders.

The MRMV4 is a motor protection relay that provides precise and reliable protective functions and is very easy to operate. The MRMV4 provides all necessary functions to protect low and medium voltage motors at all power levels. The protection functions are based on current and voltage measurement and supervise all thermal conditions, motor start sequence, stall and locked rotor, undercurrent and incomplete sequence. Overcurrent functions and earth fault functions are also available as power protection, frequency and voltage elements. The motor operation can be monitored by statistic and trend recorders. The MRMV4 is available in 192 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRMV4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRMV4-2E or in the user manual MRMV4-3.6-EN-MAN) for a complete overview.

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1A / Earth Overcurrent (XI1E1)
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1A / Earth Overcurrent for Compensated or Isolated Grids. 250 x In (half cycle), 100 x In for 1s, 30 x In for 10 s, 4 x In continuous. IEC 60255-1

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5A / Earth Overcurrent (XI1E5)
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5A / Earth Overcurrent for Compensated or Isolated Grids. 250 x In (half cycle), 100 x In for 1s, 30 x In for 10 s, 4 x In continuous. IEC 60255-1

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Rotor Earth Fault Protection (XR1)
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Detection of high impedance earth faults in rotor windings of synchronous generators in two stage design. Short circuit and overvoltage proof measuring input for earth fault protection. Separately setting of trip delay for R< and R<<

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Directional Feeder Protection (HighPROTEC MCA4)
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The MCA4 is a precise and reliable protection, control and monitoring relay for feeder, grid and generator applications. The latest generation series from Woodward (formely SEG), the MCA4 incorporates all the ANSI and IEC concepts to comply with ever changing grid interconnection requirements. Flexibility in hardware, software, application, user interface and communications makes the MCA4 adaptable to requirements today and in the future.

The MCA4 is a precise and reliable protection, control and monitoring relay for feeder, grid and generator applications. The latest generation series from Woodward (formerly SEG), the MCA4 incorporates all the ANSI and IEC concepts to comply with ever changing grid interconnection requirements. Flexibility in hardware, software, application, user interface and communications makes the MCA4 adaptable to requirements today and in the future.  The protection functions of the MCA4 have been adapted to comply with the requirements of the VDE-AR-N-4110/4120:2018.  The parameterizing and analyzing software Smart view is usable for each HighPROTEC device and free of charge.

MCA4 is the ideal directional feeder protection for industrial and utility distribution networks. Integrated interconnection / grid code package. Large control capacity for switchgear. Very large protection package (reclosing, load shedding, load restoration, demand management, monitoring functions,...)

ANSI: 50, 51, 67, 51C, 51V, 50N, 51N, 67N, 46, 49, 27, 59, 59N, 81U/O, 60FL, 79, 86, 50BF, 74TC , 81R, 78, 47, 60FL, 60L, 32F, 25, 37F, 32Q, 37Q, 37QR, 32S, 37S, 37R, 55, 51C, LVRT , Q->V, UFLS

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Directional Feeder Protection (High PROTEC MRA4)
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The MRA4 is a high precision and reliable protection and control relay for feeder, grid and generator applications. The intuitive setting concept with plausibility test enables reliable and time optimized configuration of the extensive protection function to a variety of applications such as incoming or outgoing feeder protection, network protection and generator protection. The implemented switchgear management guaranties an efficient and safe control and supervision. The device is a bench mark in flexibility and usability and offers various communication options. The hardware is designed for all nominal values in combination with protection and control functionality. The parameterizing and analyzing software Smart view SE is usable for each HighPROTEC device and free of charge. The MRA4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRA4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRA4-2E or in the user manual MRA4-3.6-EN-MAN) for a complete overview.

The MRA4 is a high precision and reliable protection and control relay for feeder, grid and generator applications. The intuitive setting concept with plausibility test enables reliable and time optimized configuration of the extensive protection function to a variety of applications such as incoming or outgoing feeder protection, network protection and generator protection. The implemented switchgear management guaranties an efficient and safe control and supervision. The device is a bench mark in flexibility and usability and offers various communication options. The hardware is designed for all nominal values in combination with protection and control functionality. The parameterizing and analyzing software Smart view SE is usable for each HighPROTEC device and free of charge. The MRA4 is available in 384 variants, that cover all combinations of properties that you might need or not need for your application. Each variant is uniquely specified by a typecode of form MRA4-2xxxxx (i.e. 5 digits/letters following the '-2'). Check the Order Form (depicted below, or in the brochure DOK-FLY-MRA4-2E or in the user manual MRA4-3.6-EN-MAN) for a complete overview.

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5A Power and Reverse Power (XP2R5)
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Measurement phase-to-neutral or phase-to-phase voltage. Tripping times for supervision P> and PR< adjustable.


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AVR Electronics Private LimitedUnit II, 15, 7th Cross, 5th Main, Near CBI Office, Ganga Nagar, Bengaluru-560032, Karnataka, India

Vijay S. Hubli (Director)

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