L&T offers you a wide range of Power factor Correction Relays suitable for all standard applications. Their intelligent adjustment interface ensures balanced usage of capacitors based on the number of switching operations and the connection time of each step, thus ensuring long life for switchgear and capacitors.
etaCON L Series :-
Available steps: 3, 5, 7, 8, 12
Compact size (96 × 96 mm) in 3, 5, 7 steps version
Automatic recognition of current flow direction
Auto / Manual Control
Online display of PF, Voltage, Current, kVAr, capacitor overload and Panel temperature
Average weekly power factor measurement
Capacitor over-current and panel over-heating protection
No-voltage release protection function
Last two can be programmed for Capacitor switching / Alarm / Fan Control
Keypad locking function
PGR 8800 provides effective arc flash protection using optical point and fiber sensors. The system generates a trip within 1 millisecond of arc detection. Thus, power may be disconnected within 40-50 milliseconds before it can cause significant damage.
Combination of optical point and fiber sensors
Redundant internal trip path
Continuous health monitoring of sensors
Optional current based protection to avoid nuisance tripping
Plug –n-play configuration software
Easy to retrofit in LV, MV switchboards
Provision of back up battery
Discrete Protection Relays
T4500: Auto synchronizer :-
Automatic synchronization with relay outputs for speed control
Adjustable delta frequency and delta voltage
Adjustable breaker make time
Visual indication of bus voltage, generator voltage, closing signal, delta voltage, increase and decrease signals
Automatic voltage matching
Operating temperature range: -20°C to +70°C
Vibration test up to 4g (5 - 100Hz)
Certified by major classification societies
Flame retardant enclosure
DIN rail or screw mounting
MC12A - 1 Ph O/C + E/F relay
1 phase, non-directional, Over Current or Earth Fault Relay. The relay can be used for feeder protection in all low voltage, medium voltage sub-stations. The relay has a built in high set facility. DIP switches are provided on the front panel for pick up and time delay settings
Dual CT Rating
Draw out type construction
Micro controller based design
7 types of trip time characteristics available
nX Series offer you numerical type 3 phase overcurrent & Earth Fault Relay. Its microcontroller based design offers you to choose from various field selectable IDMT & definite curves.
Dual CT rating
Relay has a unique provision whereby, it can be made suitable for operation from either 1 Amp CT or 5 Amp CT secondary.
Large 35mm graphical LCD Display with bigger font size provides excellent viewing for various lighting conditions.
Recording of last 15 trip events separately for O/C & E/F with Date and Time stamping
Wide range of TMS
Universal Auxiliary Supply : 24 to 240 V AC/DC
MD32 G Generator Differential and REF
MD32-G is three-phase percentage biased differential protection relay for generators and rotating machines, with stator earth fault or restricted earth fault element.
Phase Overcurrent protection
Phase Differential protection
Dual slope programmable percentage bias curve
Earth Fault or Restricted Earth Fault protection
Breaker Failure protection
Modbus Communication Protocol
Maximum Demand and Inrush Recording
MG30 / MG30-I is Multifunction Microprocessor Relay for protection of medium/large synchronous generators. The relay measures the RMS of three-phase currents and voltages and computes the positive and negative sequence components of the Current system.
Range of Distribution Boards :-
Voltage-controlled overcurrent protection
Thermal image element with prealarm level
Reverse power protection
Loss of Field protection
PT s' fuse failure protection
Modbus Communication Protocol
Breaker Failure protection
Inadvertent C/B closure protection
Blocking Output and Blocking Input for pilot wire selectivity coordination
MRP11 Reverse Power Relay
MRP11 is micro controller based single phase, reverse power relay with one measuring element. Relay operates for pure active reverse power only and will not cause spurious tripping due to PF fluctuations in the system. Relay can work as a reverse reactive power relay with an addition potential transformer.
Four Quadrant operations
Reactive power option Voltage Input: 110 / 415 V AC (Field Selectable)/li>
SC14S Instantaneous Earth Fault Relay
SC14S is a self-powered, single-phase, non-directional, Earth fault relay with one measuring element.
Micro-controller based design
Draw out facility
Built in Third Harmonic Filter.
It helps to avoid spurious tripping in harmonic rich power systems
Instantaneous time delay or delay of 100 ms, 200 ms can be set
MM10 Relay is a microprocessor based Motor Protection Relay with 4 digits LED Display
4 Digit LED display
Measurement of RYB, Zero Sequence current and Thermal capacity.
Separate LED’s for indication of Motor operational, Trip & Thermal OL/ pre-alarm status.
Programmable thermal OL time constant right from 1 sec to 40 sec.
2 nos. of C/O output contacts.
Relay testing facility
Trip data recording
Fault current or cause of last trip is displayed.
MM30 Comprehensive Motor Protection
MM30 is a Microprocessor based Comprehensive Motor Protection Relay designed for Medium and Large Motors
Auto setting of parameters
Draw out enclosure
8 digit alpha numeric display
Real Time Measurements
Measurement and display of actual & trip data recordings.
8 LED’s for fault indication.
Control on number of starts of motor
Starting sequence control. During start-up of the motor, the unit can control an output contact to automatically manage the starting transition.
RS485 port for communication with Modbus Protocol.
MPR300 Mini Motor Protection Relay
MPR300 is a Microprocessor based LT Motor protection relay. The relay has got inbuilt CTs for motor sizes up to 50KW (i.e 88 A current)
LED’s for trip indication.
Inbuilt CTs available
4 selectable trip time curves for thermal overload
Test facility through front push button.
Manual reset facility through front push button.
With / Without fail safe mode