Protective Relays,Earth Leakage Relays,Voltage Relays,Earth Fault Relay,India

Procuring superior quality raw material from reliable vendors across the globe, we have been able to fabricate a wide range of protective relays. These electrical products are customized as per the specifications of our clients and are known to offer maximum performance.

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Earth Leakage Relays

We offer a precision engineered range of earth leakage relays that have been manufactured under the strict supervision of our team of experts. Precisely operated, these are widely in demand ion various commercial and industrial applications and can be customized as per the specifications of our clients. These are used for sensing the earth leakage current for various equipment such as like L.T. Panels, Switch boards, Generators, Transformers, Motors etc. leakage current if continues for long ca cause insulation breakdown. Our leakage relays are perfect solution for overcoming the problem as these sense current through CBCT thus energizing relay when the current goes out of the range selected on the dial. These relays are provided along with user settable (0- 10sec) time delay where in CBCT is connected externally with the Bus-bar or cable carrying load current passed through it.

Special Features

• Available with Auto/Manual Reset and test facility
• Compact and Smart design fitting any standard on any standing mounting channel
• Total wireless interiors
• Choice of screw less terminals
• Calibrated scale with 5% Accuracy
• Indications for Healthy, Faulty and Relay 'ON
• Rugged and error proof

Technical Data

• Supply Voltage110V/220V/380V/415V AC 50Hz or 12/24VDC
• Permissible Supply Variation;20%
• Output Contacts: Two change over (Potential Free) • Switching Duty: 6A resistive at 24V DC or 240V AC
• Signal: From core balanced current transformer (CBCT)
• Core Balanced C.T.: Tape wound or resin cast (with I.D. as per requirement)
• Time Delay (optional): 0-10 sec settable
• Reset: Auto/Manual resetting facility
• Setting Accuracy: 5% of Full Scale
• Mounting: On Any standard mounting channel.
• Dimensions : 77mm(W) * 90mm(H) * 110mm(D)

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DC Earth Leakage Relays

Available with Auto/Manual Reset and test facility our range of DC earth leakage has been compactly designed to fit any standard mounting channel. These possess total wireless interiors thus making it highly rugged and error proof. These can be customized as per the specifications of our clients and possess following features:

• Choice of screw less terminals
• Calibrated scale with 5% Accuracy and
• Indications for Healthy, Faulty and Relay 'ON

Technical Data

• Supply Voltage: 110V/220V/380V/415V AC 50Hz or 12/24V DC
• Permissible Supply Variatio: 20%
• Output Contacts: Two change over (Potential Free) • Switching Duty: 6A resistive at 24V DC or 240V AC
• Signal: From Battery Terminals & Earth
• Time Delay (optional): 0-10 sec settable
• Reset: Auto/Manual resetting facility
• Setting Accuracy: 5% of Full Scale
• Mounting: On Any standard mounting channel
• Dimensions: 77mm (W) X 90mm (H) X 110mm (D) • For VR96-1 = 96mm (W) x 96mm (H) x 70mm (D) • Provided with user settable (0-10Sec) time delay

Operation Sensing the resistance between positive- negative terminals & earth, this equipment is used for sensing the DC earth leakage current for electrical equipment such as L.T. Panels and Switch boards. Leakage current always depends on the resistance value between respective terminals, therefore, higher the resistance, lower is the leakage current and vice versa. Our earth relay senses leakage current through Resistor Bridge & energizes relay when Resistance value goes out of the range selected on the dial thus assuring long life of the equipment.

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Earth Monitoring Relays

Sensitivity to supply Voltage fluctuations like Spikes etc might damage the hardware or corrupt the data on software and is a common problem with almost all of the electrical equipment. Computers are frequently installed on dedicated clean circuits for a clean supply. Further, these also have inbuilt suppression and filtering circuitry which may leak the unwanted components of electric supply to earth.

Earthing is required to carry a significant amount of continuous leakage current in case when large numbers of computers are connected on same circuit. Isolation of any section will rise to potentially lethal voltage if there is any breakage in the earth connection which may also result in the failures of the computers due to voltage spikes. As recommended in IS 3043 (Section 39.2.4.2), providing a protective device for monitoring the continuity of the protective earth connection is mandatory. This is also required for providing the means of automatic disconnection in case of failure or at least give an audio alarm to user. Our Earth Monitoring Relay is widely in choice as it senses the rise in the voltage between the earth and neutral conductors and also detects the integrity of the earthing connection. These are advised to be installed at UPS supply pints and possess following features:

• Available in door mounting (96 x96mm) channel mounting models
• Smart design that can fit on any mounting channel • Choice of screw less terminals
• Total wireless interiors
• ± 2% Accuracy
• Test & Auto/Manual Reset facility
• Designed for high reliability, as relay energizes only under fault conditions

Technical Data

• Supply Voltage (control supply) : 110V /220V / 380V / 440V AC, 50Hz or 12V DC / 24V DC
• Permissible Supply Variation : ± 25%
• Output Contacts: Two changeover contacts / One change over with Buzzer
• Switching duty: 6A resistive at 24V DC or
• 240V AC
• Relay Status: De-energised in normal conditions
• Set Point (Range): 1- 10 V AC
• Time delay (optional): 0.1-10 sec.
• Settable
• Mode of operation: Over voltage
• Reset: Automatic/Manual.
• Setting Accuracy: ± 5% of full scale
• Mounting: Any standard mounting channel
• Dimension: 77mm (W) X 90mm (H) X 110mm (D). For VR96-1 = 96mm (W) x 96mm (H) x 70mm (D)
• Optional time delay for relay output

Operation

This relay has an easy mode of operation as it senses voltage between earth & neutral terminal on load side continuously. Voltage increases once the earth gets disconnected and the relay give output for tripping or audio alarm when voltage rises above the limit set on the dial.

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Earth Fault Relays

Following international standards of quality, we manufacture a flawless range of earth fault relays that are available in aesthetically pleasing and compact designs. This equipment has easy mode of operation as it monitors the current flowing through the circuit with the help of secondary CT which lies in the path of the current. Single CDT is required for one phase where as for 3 phases one CT per phase is required. Once the current signal goes out of the range selected on the dial, relay status changes where as in case of 3 phase current relay, each phase of current is sensed separately to provide protection. These relays are provided with in the time delays and for the earth fault relays CT is connected in the earth fault current path. For e.g. Cable connected between Alternator Neutral and Ground, or Neutral of the circuit.

Special Features

• Wireless interiors
• Highly rugged and error proof
• Facilities: Test; Auto/Manual-Reset 2% Accuracy • Smart design to fit on any standard mounting channel

Technical Data

• Supply Voltage: 110V/220V/380V/415V AC 50Hz or 12/24V DC
• Permissible Supply Variation: 25%
• Output Contacts: 2 change over (2-set point relay, 2 change over each)
• Switching Duty: 6A resistive at 24V DC or 240V AC
• Relay Status: De-energized in normal conditions
• Set Point: For Current relay = 40% - 120% (with 5A CT:1A-6A)
• For Earth fault relay = 50% - 100% (with 5A CT:2.5-5A)
• Signals: From 5A CT secondary (class 5P10 or 0.5 class of accuracy)
• Time Delay (optional): 0-10 sec settable
• Mode of Operation: Over Current
• Reset: Automatic/Manual (User Selectable)
• Setting Accuracy: 5% of Full Scale
• Mounting: Any standard mounting channel
• Dimensions: Width for CE/EFR-1 relays - 77mm for CR-3 - 112mm for CR3-2S relays 147mm
• Height - 90mm

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Voltage Relays

Manufacturing a wide range of voltage relays, we have been able to cater to the wide requirements of our clients across the globe. These are in compliance with international standards of quality and delivers optimum performance. Customized as per the specifications of our clients, these possess following features and technical details:

Special Features

• Available with Pick-up and Trip Time Delay in 3-Phase Voltage Relays
• Smart design to fit on any standard mounting channel
• Choice of screw less terminals
• 2% Accuracy
• Test and Auto/Manual Reset facility
• Signal and Source (Control supply) are separate
• Designed for high reliability, as relay energizes only under fault conditions
• Only 1/2 phase voltage relay with user selectable U/V or O/V range by DIP switch
• Only 1/2 phase voltage relay with 2 user selectable voltage range by DIP switch

Technical Data

Supply Voltage: 110V/220V/380V/440V AC 50Hz or 12/24V DC, Permissible Supply Variation: 25%, Output Contacts: 2 change over contacts (2 sets, one for each set point in case of 4.2S Relays)
5.Switching Duty:, 6A resistive at 24V DC or 240V AC 6.Relay Status: De-energized in normal conditions, 7.Set Point (Range) : a)VR1-1/VR1-2 = 180- 220 & 240-300/340-400 & 440-500 V AC b)VR96-1 = 180-220 & 240-300/340-400 & 440-500 V AC, 8. VR3-3/VR3-4 = 340-400 & 440-500 V AC, 9.Time Delay (optional): 0.1-10 sec settable, 10.Mode of Operation: Under Voltage/Over, 11.Voltage (user selectable) & U/V-O/V combined, 12.Reset: Automatic/Manual, 13.Setting Accuracy: 5% of Full Scale, 14.Mounting: Any standard mounting channel, 15.Dimensions: 77mm (W) * 90mm(H)* 110mm(D) for 2S models - 155mm(W) For VR96-1 = 96mm(W)* 96mm(H)* 70mm

Operation

1.VR1-1 / VR1-2

• 1ph/2ph. voltage relay monitors the voltage signal (to be connected at sensing point)
• Status of relay changes when the signal goes out of the range which is selected on the dial
• Relays available with or without time delays
• 'SET' LED glows when voltage signal goes out of the range selected in case of relays with time delay
• Relay energized after delay; indicated by 'RLY' LED

2.VR3-3 / VR3-4

• 3phase voltage relay senses the voltage level of each phase individually in a continuous mode
• In case any phase goes out of the range selected on voltage set dials, this equipment changed the status of relay
• Voltage of which phase have gone under or over the range by separate LEDS indicated
• When voltage level is within the voltage range selected, HEALTHY LED glows
• Relay energizes in fault condition after the 'PICKUP' time delay
• Relay de-energizes after 'TRIP' time delay when normal conditions resumes
• Relays with two set point used for two separate relay contacts of under and over voltage protection for same source

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Current Relays

Manufactured using superior quality raw material our range of Current Relays is widely in demand in the market. These have been compactly designed and have wireless interiors which make this equipment highly rugged. Highly accurate, this equipment is provided with auto and manual reset test facilities and can fit on any standard mounting channel.

Technical Data

• Supply Voltage: 110V/220V/380V/415V AC 50Hz or 12/24V DC
• Permissible Supply Variation: 25%
• Output Contacts: 2 change over (2-set point relay, 2 change over each)
• Switching Duty: 6A resistive at 24V DC or 240V AC
• Relay Status: De-energized in normal conditions
• Set Point: For Current relay = 40% - 120% (with 5A CT:1A-6A)
• For Earth fault relay = 50% - 100% (with 5A CT:2.5-5A)
• Signals: From 5A CT secondary (class)
• 5P10 or 0.5 class of accuracy)
• Time Delay (optional): 0-10 sec settable
• Mode of Operation: Over Current
• Reset: Automatic/Manual (User Selectable)
• Setting Accuracy: 5% of Full Scale
• Mounting: Any standard mounting channel
• Dimensions: Width for CE/EFR-1 relays - 77mm for CR-3 - 112mm for CR3-2S relays - 147mm
• Height - 90mm

Operations

This current relay is known to monitor the current flowing through the circuit continuously through the secondary of CT which lies in the current path. Single CT required for one phase where as for 3 phase, one CT per phase in required. Relay status changes when current signal goes out of the range selected on the dial. Each phase of current is sensed separately in case of 3 phase current relay for providing protection. These are available with time relays and for earth fault relays the CT is connected in earth fault current path For e.g. Cable connected between Alternator Neutral and Ground, or Neutral of the circuit.

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Frequency Relay

We manufacture a wide range of Frequency Relay which has been precisely fabricated under the supervision of our technical experts. These are meant for continuous monitoring of the line frequency which is compared with highly stable internal crystal based frequency to achieve error-proof result. In case the line frequency goes out of the range selected, status after the SET time delay is changed.

Special Features

• Under and Over Frequency relays with calibrated linear scale
• Smart design to fit on any standard mounting channel
• Choice of screw less terminals
• 2% Accuracy
• Total wireless interiors
• Test and Auto/Manual Reset facility
• Ideal for DG set applications
• Designed for high reliability, as relay energizes only under fault conditions

Technical Data

• Supply Voltage: 110V/220V/380V/440V AC 50Hz or 12/24V DC
• Permissible Supply Variation: 25%
• Output Contacts: 2 change over contacts
• Switching Duty: 6A resistive at 24V DC or240V AC
• Relay Status: De-energized in normal conditions
• Protective Relays
• Set Point (Range): U/F = 30 - 45 Hz
• O/F = 55 - 60 Hz
• Time Delay (optional): 0.1-10 sec settable
• Mode of Operation: Under Frequency/Over
• Frequency combined
• Reset: Automatic/Manual
• Setting Accuracy: 5% of Full Scale
• Mounting: FR-1 = Any standard mounting channel
• FR96-1 = Panel Mounting (Flush)
• Dimensions : 77mm(W) * 90mm(H) * 110mm(D)

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Impulse Relay

Adopting latest technological development, we have been able to meet the varied requirements of our clients by manufacturing a wide range of Impulse Relay. These are fabricated using superior quality raw material and possess following features:

• Free from effects of Surges
• Works with same accuracy even with variations of 25% in power supply
• Relay ON and OFF indications on front for assisting Time settings
• Specially designed for Engine Starting
• Applications like DG set and Fire Fighting Pumps etc.
• Relay stock for 12V DC and 24V DC models

Technical Data

• Output contacts: a) 1 change over (RL1) ON/OFF adjustable contact b) 1 change over (RL2) for Alarm or Indication after impulses completes
• Switching Duty: 6A Resistive at 240V AC or 24V DC
• Electrical Life: 10^5 Operational at rated switching duty
• Operating Voltage: 12V / 24 V DC (can be made for other voltages)
• Permissible Voltage: 25% max.
• Power Consumption: 10VA (max.).
• Reset Time: 100 ms Max
• Repeat Accuracy: 0.5% full scale
• Setting Accuracy: 5% full cycle
• LED Indications: a) Power ON, b) RL1 ON, c) RL1 OFF, d) RL2 ON
• Mounting: Any standard mounting channel
• Dimensions: 77mm(W) * 90mm(H) * 110mm(D)
• User settable
• Indications for power supply, RL1 ON, RL1 OFF and RL2 ON available in this

Operation

Impulse relay is also known as GT2-3IR which is a perfect ready made solution for engine starting circuits used for DG Sets, fire fighting pumps etc. It has two relay outputs viz. RL1 and RL2. Comprising of two relay outputs RL1 and RL2, these work more efficiently providing effective results. 1.RL1

• Provides starting impulses where in the duration of the impulse (ON Time) and the time between the tow impulses (OFF Time) 2.RL2
• Provides 'FAILS TO START' alarm/indication in case all the number of attempts to start engine by RL1 have failed
• Number of attempts is set to be 3 but can be customized as per the specifications of our clients

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Toggle Relay

We have been engaged in manufacturing a wide range of Toggle Relay which is featured with wireless interiors that makes it highly rugged and error proof. This is a user settable 2 Way/3 Way where in supplies power amongst various loads. This equipment is electronically interlocked with others for preventing simultaneous out puts. This equipment is ideal to be fitted in fire fighting pumps, water pump and air conditioners.

Technical Data

• Output contacts: 3 nos. of 1 change over contact
• Switching Duty: 6A Resistive at 240V AC or 24V DC
• Electrical Life: 10^5 Operations at designed duty cycle
• Operating Voltage: 220V AC or 110V AC or
• 24 V AC/DC
• Permissible Voltage: +/- 20% max.
• Power Consumption: 10VA (max.).
• Control Input: Potential free contact
• LED Indication: a) Power ON, b) RL1 ON, c) RL2 ON, d) RL3 ON
• Reset Time: 100 ms Max
• Dimensions: 40mm(W) * 90mm(H) * 110mm(D)

Operation

This equipment toggles O/P on every new pulse (potential free) to the signal terminals and has the facility for selecting 2 or 3 outputs as per the requirement of our clients.

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IDMT Relays

Holding expertise in manufacturing a wide range of IDMT Relays, we have been catering to wide requirements of electrical and electronics industry. Customized as per the specifications of our clients, these have been innovatively designed and offer best value for the money. Widely applied in various electrical appliances for power protection, these possess following features:

• Micro /controller based highly accurate operation
• RS485 output provide
• Compact & user friendly IDMT relay
• Combined 'Low set' & 'High set' inversed definite minimum time (IDMT)relay
• User selectable 10N-3 sec & 10N-1-3sec normal inverse waves
• Wide input voltage range 90-270v Ac/Dc & 15-40 VDC
• Facility to by pass high set
• Separate 'Alarm' & 'Trip' relay contacts

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CBCT Relays (N96 Digital Relays)

Manufacturing a wide range of CBCT (N96 Digital Relays), we have been able to satisfy wide needs of our clients. Also termed as digital relay, these refer to protective relays that uses an advanced microprocessor for analyzing power system voltage and currents. These are primarily used to detect faults in an electric power system and are generally gray areas on which digital/numeric relay constitutes. These apply A/D (analog/digital) conversion processes to the incoming voltages and currents and analyze the A/D converter output to extract as a minimum magnitude of the incoming quantity. These protective relays use Fourier transformer concept (RMS and some form of averaging are used in basic products). Fourier transform is commonly used to extract the signal's phase angle relative to some reference, except in the most basic applications. Capable of applying advanced logic this equipment is highly in demand. It also analyzes:

• Whether the relay should trip or restrain from tripping based on current and/or voltage magnitude (and angle in some applications)
• Complex parameters set by the user
• Relay contact inputs

Timing and order of event sequences Some of the features of these digital relays are:

• Being user configurable at a level, this relay can be used for changing front panel switches or moving of jumpers on a circuit board
• Advanced event recording include some means for the user to see the timing of key logic decisions, relay I/O (input/output) changes, and to finding an oscillographic fashion at least the fundamental frequency component of the incoming AC waveform
• Relay possess an extensive collection of settings, beyond what can be entered via front panel knobs and dials. These settings are the transferred to the relay via an interface with a PC (personal computer), which is used to collect event reports from the relay.
• Advanced metering and communication protocol ports available in modern versions of digital relay which allows the relay to become a focal point in a SCADA system

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