Navago Electronics & Electricals
Yeshwanthpur, Bengaluru, Karnataka
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Earth Leakage Relay

Prominent & Leading Manufacturer from Bengaluru, we offer earth leakage relay, elr-bif earth leakage relay, elr- msmb earth leakage relay, el4 ld1 earth leakage relay and digital earth leakage relay.

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Product Details:
BrandNavago
VoltageAs per customer requirement
Frequency50 Hz
PhaseSingle, Three
MountingBase, 96 sq mm & DIN rail mounting
Leakage CurrentAs per customer requirement

Description of Earth Leakage Relay :

This relay is used on AC systems and is a sensitive electronic protective device. Its operation on Earth fault is independent of the system voltage imbalance. This relay can detect Earth fault currents as low as 1 amp. This is 0.25% in a 400 amps feeder system. This can be used on a single phase or on a three-phase network.


Principle of Operation :

This relay operates on the core balance principle wherein the currents in the three phase of the system are summed by a core balance C.T. which for normal conditions equates to zero. In case of a leakage current to earth this balance is disturbed causing the electronic circuit to operate a relay within the unit. In this event the relay that is generally connected to circuit breaker operates thus tripping the main circuit. The electro mechanical relay operates on fault. The Earth Leakage Relay is provided with a TEST push button for checking its operation and a RESET button to reset the relay on operation. This helps in checking the proper functioning of the relay.

Construction :

  • The relay is housed in a robust insulated enclosure. The electronic circuit has a voltage developer, a level detector and a static switch which drives an electro-mechanical relay, the terminals of which are connected to a switch gear.
  • The electro-mechanical relay operates on a fault. The Earth Leakage Relay is provided with a TEST push button for checking its operation and a RESET push button to reset the relay on operation. This built-in test feature enables the quick check of the proper functioning of the Earth Leakage Relay.
  • The relay is also offered in a flush mounting design of standard, 96 sqmm.
  • Type ELR Relay can be used to detect earth leakage currents upto three feeders simultaneously. However it will not indicate in which feeder the fault has occured. The relay contacts can be connected to give an alarm or otherwise made to initiate tripping of all the terminals.
  • On set of N/O and N/C change over contacts can be provided.

 

Mounting:

The Earth Leakage Relay can be supplied in base mounting (Projection type) or 96 sqmm (door mounting). We can also supply the relays with DIP Type switches for leakage and time delay selection.

 

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Product Details:
BrandNavago
Model Name/NumberELRBIF
Voltage (V)110 or 220 or 415 or 550 V AC
Current (Amps)5 Amps
Leakage Current Setting250 mA, 375 mA, 500 mA
Number of Contact1 N/O , 1 N/C

Principle of Operation:

This relay operates on the core balance principle wherein the currents in the three phase of the system are summed by a core balance C.T. which for normal conditions equates to zero. In case of a leakage current to earth this balance is disturbed causing the electronic circuit to operate a relay within the unit. In this event the relay that is generally connected to circuit breaker operates thus tripping the main circuit. The electro mechanical relay operates on fault. The Earth Leakage Relay is provided with a TEST push button for checking its operation and a RESET button to reset the relay on operation. This helps in checking the proper functioning of the relay.

Under healthy conditions ‘OK’ LED will glow. In case of any leakage current the relay will ‘TRIP’ LED will glow.

Mounting: The relay is base mounting and has built in CBCT.

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Product Details:
BrandNavago
Model Name/NumberELRMSMB
Current0.5 A to 4.0 A or 80 mA to 750 mA or 750 mA to 2 A
Voltage110/230 V or 415/550 V
PhaseSingle Phase
Dimension120 mm X 160 mm X 60 mm.
MaterialMetal

This relay operates on the core balance principle wherein the currents in the three phase of the system are summed by a core balance C.T. which for normal conditions equates to zero. In case of a leakage current to earth this balance is disturbed causing the electronic circuit to operate a relay within the unit. In this event the relay that is generally connected to circuit breaker operates thus tripping the main circuit. The electro mechanical relay operates on fault. The Earth Leakage Relay is provided with a TEST push button for checking its operation and a RESET button to reset the relay on operation. This helps in checking the proper functioning of the relay. External (remote) TEST and RESET connections is also be incorporated. Under healthy conditions ‘OK’ LED will glow.


In case of Fault/Leakage Fault LED will glow and after set time delay the relay will Trip and ‘TRIP’ LED will glow along with Fault LED. On rectification of Fault the Fault LED will switch OFF but TRIP Led will glow unless and until RESET button is pressed.

Other Details:

  • Option of External TEST and REST.
  • Additional External LED’s for Trip and OK will be provided.
  • Transformer will be coated with additional layer of resin for protection from moisture.
  • Real time monitoring of CBCT wherein the relay will trip on disconnection of CBCT.
  • Latching type model where the relay will Reset only on pressing of RESET button.
  • LED’s for OK, Fault, CBCT Open and Trip provided in the relay.

 

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Approx. Rs 2,000  / Piece Get Latest Price

Product Details:
BrandNavago
VoltageAs per customer requirement
Voltage (V)110 , 220 , 415, 550 V
Leakage CurrentAs per customer requirement
Frequency50 Hz

Principle of Operation:

This relay operates on the core balance principle wherein the currents in the three phase of the system are summed by a core balance c.T. Which for normal conditions equates to zero. In case of a leakage current to earth this balance is disturbed causing the electronic circuit to operate a relay within the unit. In this event the relay that is generally connected to circuit breaker operates thus tripping the main circuit. The electro mechanical relay operates on fault. The earth leakage relay is provided with a test push button for checking its operation and a reset button to reset the relay on operation. This helps in checking the proper functioning of the relay. External (remote) test and reset connections can also be incorporated.

Under healthy conditions ‘OK’ LED will glow. In case of Fault/Leakage after set time delay the relay will Trip and ‘TRIP’ LED will glow.

Mounting:

The relay can be supplied in 96 sqmm (door mounting) or DIN rail mounting.

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Approx. Rs 2,000  / Number Get Latest Price

Product Details:
Voltage (V)As per customer requirement
BrandNavago
Leakage Current SettingAs per customer requirement
Frequency50 Hz
Number of contacts2 sets of C, NC, NO
Principle of Operation:This relay operates on the core balance principle wherein the currents in the three phase of the system are summed by a core balance C.T. Which in normal conditions equates to zero. In case of a leakage current to earth this balance is disturbed causing the electronic circuit to operate a relay within the unit. In this event the relay that is generally connected to circuit breaker operates thus tripping the main circuit. The electro mechanical relay operates on fault. The earth leakage relay is provided with a test push button for checking its operation and a reset button to reset the relay on operation. This helps in checking the proper functioning of the relay. External (remote) test and reset connections is also be incorporated.

Front panel: The device consists of lcd display, six keys and two led indications on the front panel. Lcd displays all the set parameters like the leakage current and time delay. The lcd displays any leakage current present.

Back panel: The back panel is for connection the supply (l1&l2 or l1&l3), remote test and remote reset 2 sets of c nc no and connection of the cbct (s1 s2).

Operation: The setting of leakage and time delay is password protectected once you enter the password you can set the leakage setting and time delay by using the up or down. You can set the leakage at any value from 30 ma to 10 A

Once tripped, the device will trip the relay and the indication trip falult led will glow. In case after the relay trips the supply to the relay is switched off and the fault is rectified the relay when switched on will go to trip conditon unless and until the reset button is presed.

The remote test and remote reset can be used to simulate a fault condition to test and reset the relay functionality externally.

In case of a disconnection of the cbct the relay will immediately trip and ct open will be displayed in the lcd. 
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Raghavendra Shenoy(Partner)
No. 3, Pipe Line Main Road, Raghavendra Layout
Yeshwanthpur, Bengaluru - 560022
Karnataka, India
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