Earth Fault Relays N22-EFR

Name: Earth Fault Relays N22-EFR
Brand: PROTECH ENGINEERING & CONTROL PVT. LTD.
Price: 1700 INR
Availability: InStock

1700 INR/Piece

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Product Details:

Coil Power Approx. 1.2VA
Power Consumption Less than 3VA
Ambient Temperature -10C to +55C
Contact Form 1 Change Over (CO) / SPDT relay output
Mechanical Life 1,000,000 operations
Contact Resistance < 100 m
Contact Material Silver alloy
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Earth Fault Relays N22-EFR Price And Quantity

Minimum Order Quantity 50 Piece
Price 1700 INR/Piece

Earth Fault Relays N22-EFR Product Specifications

Usage Earth fault sensing and protection in electrical systems
Terminal Type Screw type
Operate Time Adjustable 0.1 sec to 10 sec
Supply Terminal DIN rail mountable terminals
Coil Voltage As specified by model variant (e.g., 230V AC, 110V AC, 24V DC)
Contact Resistance < 100 m
Contact Material Silver alloy
Mechanical Life 1,000,000 operations
Contact Form 1 Change Over (CO) / SPDT relay output
Working Temperature -10C to +50C
Dielectiric Strength 2kV for 1 min between contacts and coil
Insulation Resistance > 100 M at 500V DC
Protect Feature Earth fault detection, trip indication
Dimension (L*W*H) Approx. 90mm x 70mm x 55mm
Theory Electromagnetic relay
Size Compact modular design
Ambient Temperature -10C to +55C
Contact Load Low Power
Product Type Earth Fault Relays N22-EFR
Weight Approx. 120g
Rated Voltage 230V AC / 110V AC / 24V DC (varies by model)
Power Consumption Less than 3VA
Coil Power Approx. 1.2VA
Color Blue

Storage Temperature -20C to +70C
Housing Material Flame-retardant ABS
Voltage Withstand 2.5kV for 1 min between input and output
Reset Type Manual and automatic reset options
Mounting Type 35mm DIN rail mounting
Humidity Up to 95% RH (non-condensing)
Response Time Fast tripping under fault conditions
Standards Compliance IEC 60255, IS: 3231
Sensitivity Adjustment 0.03A to 5A (adjustable)
Frequency 50Hz/60Hz compatible
Trip Indicator LED indicator present

Earth Fault Relays N22-EFR Trade Information

Supply Ability 1000 Piece Per Month
Delivery Time 3-5 Days

Product Description

Protime's N22 series Earth fault relays monitors the current flowing through the Earth circuit through secondary of C. T which is in the earth path or all phase CT's are connected parallel and connected to relay signal input. If Neutral is also available in circuit, a neutral CT also connected parallel. When current signal goes out of the range selected on the dial , the relay status will change . The relays are provided with time delays . For earth fault protection of alternator the C. T. Is connected between Alternator neutral & ground. The N22 relay has two selectable setting range for tripping. Also relay has wide auxiliary power supply range from 90 to 270V AC/DC.

Advanced Earth Fault Detection

The N22-EFR relay delivers dependable earth fault protection with its sensitive detection capability and speedy tripping action. It helps prevent equipment damage and ensures operator safety by monitoring leakage currents and activating an immediate trip response when faults occur.

Simple Mounting and Operation

Designed for ease of installation, the compact relay mounts directly onto standard 35mm DIN rails. Manual and automatic reset options offer application flexibility, while the clearly visible LED trip indicator enables quick status assessments by maintenance personnel.

Versatile and Robust Construction

Constructed from flame-retardant ABS, this relay withstands demanding conditions including high humidity and temperature variations. With voltage compatibility (230V AC/110V AC/24V DC), meets international standards, and is suitable for various industrial and commercial environments across India.

FAQ's of Earth Fault Relays N22-EFR:

Q: How does the N22-EFR Earth Fault Relay provide earth fault protection?

A: The N22-EFR detects insulation failures or earth faults by monitoring leakage currents within the 0.03A to 5A adjustable range. Upon detecting a fault, it rapidly issues a trip signal to disconnect the affected circuit, helping prevent equipment damage and hazards.

Q: What are the available reset modes on the relay, and when should each be used?

A: The relay offers both manual and automatic reset options. Manual reset is typically chosen for enhanced safety after a fault, requiring operator verification before re-energizing the circuit. Automatic reset is suited to systems where fast restoration is needed and manual intervention is impractical.

Q: Where can the N22-EFR Earth Fault Relay be installed?

A: This relay is designed for mounting directly onto 35mm DIN rails, making it suitable for installation in industrial control panels, distribution boards, and switchgear commonly found in electrical substations, manufacturing facilities, and commercial buildings.

Q: What standards does this earth fault relay comply with?

A: The relay adheres to IEC 60255 and IS: 3231 standards, ensuring reliable performance, safety, and compatibility in international and local markets.

Q: How can users adjust the sensitivity and response time of the relay?

A: Sensitivity can be set anywhere between 0.03A and 5A using the adjustment dial or settings on the device. Operate (trip) time is also adjustable from 0.1 to 10 seconds, allowing customization to match specific protection or coordination requirements.

Q: What are the operating and storage environmental conditions for the relay?

A: The relay is operable in temperatures ranging from -10C to +50C and can be stored within -20C to +70C. It also tolerates up to 95% relative humidity (non-condensing), accommodating a broad range of installation environments.

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