08045803208

GST : 27AABPJ8217B1Z4

Our Products

Minilec

Selec Process Instruments

PLA Products

Wago Products

Minilec Phase Failure Relays

Minilec Current Monitoring Relays

Minilec Voltage Monitoring Relays

Minilec Motor Protection Relay

Minilec Ground Fault Monitoring Relays

Minilec Frequency Monitoring Relays

Minilec Power Monitoring Relays

Minilec Voltage Scanners and Controllers

Minilec Motor Protection Relays

Minilec Microprocessor Pump Automation System

Minilec Temperature Protection Relay

Minilec Electronic Delay Timers

Minilec Liquid Level Controllers

Minilec Soft Starters

Minilec Alarm Annunciators

Minilec Agri Sector Products

Minilec Power Line Transducers

Minilec Ground Fault Monitoring Relays D2 EFR1

Minilec Ground Fault Monitoring Relays D2 EFR1 Specification

Coil Power
< 1VA

Ambient Temperature
-10C to +60C

Contact Form
SPDT

Working Temperature
-10C to +60C

Contact Resistance
< 50 m

Contact Material
Silver Alloy

Dielectiric Strength
2 kV AC for 1 min between input, output and case, 1 kV AC between contacts

Mechanical Life
10 million operations

Coil Voltage
230V AC

Power Consumption
Less than 3 VA

Protect Feature
Earth Leakage Protection

Product Type
Earth Fault Relay

Insulation Resistance
> 100 M at 500V DC

Theory
Electromechanical Relay

Usage
Industrial Ground Fault Monitoring

Contact Load
5A at 250V AC

Operate Time
Within 70 ms

Terminal Type
Screw Terminals

Rated Voltage
230V AC, 50Hz

Supply Terminal
L & N (Line and Neutral)

Size
Compact

Color
Black/White

Dimension (L*W*H)
96 x 48 x 57 mm

Weight
Approx. 200 grams

Frequency
50 Hz

Housing Material
Engineering Plastic, Flame Retardant

Type of Sensing
Core Balanced CT (CBCT) Based

Reset
Manual / Auto Reset Option

Enclosure Protection
IP20 for terminals, IP40 for enclosure

Output Contacts
1 Changeover (C/O)

Connection
As per wiring diagram supplied

Sensitivity
30, 100, 300, 500 mA (Selectable)

Mounting
Panel mounting / Din Rail mounting

Storage Temperature
-25°C to +70°C

Standards
IS 13947-1 & IEC 60947-5-1 compliant

Trip Indication
LED Indication

Minilec Ground Fault Monitoring Relays D2 EFR1 Trade Information

Minimum Order Quantity
1 Unit

Payment Terms
Telegraphic Transfer (T/T)

Supply Ability
Unit

Delivery Time
As Per Requirement Week

Main Domestic Market
All India

About Minilec Ground Fault Monitoring Relays D2 EFR1

Minilec Ground Fault Monitoring Relays

OVERVIEW:-

Earth fault/Ground fault monitoring of 3 phase systems, Manual Reset,

Input 1A or 5A through CBCT,

Adjustable earth fault trip setting,

Adjustable trip delay,

2 CO relay output

TECHNICAL SPECIFICATION:-

Supply Voltage

	System	:	24-30 VDC / 100-120 / 220-240 / 380-440 V AC ±20%
	Auxillary	:	-

Ext. Input

1A or 5A (Selectable) CBCT

Output Contacts

1 CO (2 CO) (Pick up on Fault)

Trip Setting

EF Trip Setting	:	10% -100% (adjustable) of CT sec
Under Current	:	N.A.
Over Current	:	N.A.

Power On Delay

N.A.

Trip Time Delay

0.1-1.0 / 1-10 Sec. (Adjustable)

Resetting

Manual / Remote (Selectable)

Weight

550 gms.

Dimensions (mm)

	Overall (L x W x D)	:	76 x 56.5 x 117.5
	Mounting (L x W)	:	67 x 46 / 35 mm rail Mounting

Note:

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)

APPLICATION:-

Supply Voltage

	System	:	24-30 VDC / 100-120 / 220-240 / 380-440 V AC ±20%
	Auxillary	:	-

Ext. Input

1A or 5A (Selectable) CBCT

Output Contacts

1 CO (2 CO) (Pick up on Fault)

Trip Setting

EF Trip Setting	:	10% -100% (adjustable) of CT sec
Under Current	:	N.A.
Over Current	:	N.A.

Power On Delay

N.A.

Trip Time Delay

0.1-1.0 / 1-10 Sec. (Adjustable)

Resetting

Manual / Remote (Selectable)

Weight

550 gms.

Dimensions (mm)

	Overall (L x W x D)	:	76 x 56.5 x 117.5
	Mounting (L x W)	:	67 x 46 / 35 mm rail Mounting

Note:

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)

D2 EFR1 D2 EFR1

Sensitive and Reliable Ground Fault Detection

The D2 EFR1 relay provides exceptional sensitivity with selectable earth leakage thresholds ranging from 30 to 500 mA. Operate times within 70 ms ensure timely responses to ground faults. Its high insulation resistance and dielectric strength further reinforce operational safety and equipment longevity, even in challenging industrial environments.

Versatile Mounting and Sturdy Construction

Installation is streamlined through panel or DIN rail mounting options. Housed in flame-retardant engineering plastic, the relay withstands harsh ambient conditions, with operating temperatures from -10C to +60C and storage up to +70C. Compact dimensions allow easy integration into control panels, and robust IP protection guards both the terminals and enclosure.

Intuitive Monitoring and Reset Functions

Maintenance teams benefit from clear, LED-based trip indications and manual or auto reset capability, facilitating swift fault resolution. Screw terminals and detailed wiring diagrams simplify installation. Single changeover output supports versatile connection to control systems, maximizing ease-of-use and adaptability.

FAQs of Minilec Ground Fault Monitoring Relays D2 EFR1:

Q: How does the D2 EFR1 relay detect ground faults in industrial environments?

A: The D2 EFR1 utilizes a core balanced current transformer (CBCT) to sense earth leakage or ground faults by monitoring current imbalance in the protected circuit. When the set sensitivity threshold (30, 100, 300, or 500 mA) is exceeded, it triggers a trip within 70 ms to isolate the fault.

Q: What benefits does selectable sensitivity offer for ground fault monitoring?

A: Selectable sensitivity allows users to adjust the earth leakage detection threshold to match specific site requirements, enhancing flexibility and ensuring both safety and minimal operational interruptions. This helps in tailoring protection for critical equipment or environments with variable leakage currents.

Q: Where can I mount the Minilec D2 EFR1 relay, and what are its space requirements?

A: The relay supports both panel and DIN rail mounting, fitting easily into most control cabinets due to its compact dimensions (96 x 48 x 57 mm). This flexible mounting makes it compatible with diverse industrial setups and simplifies installation in limited spaces.

Q: What process is followed to reset the relay after a trip occurs?

A: The device offers a choice between manual and automatic reset options. After identifying and addressing the fault condition, you can reset the relay either by pressing the reset button (manual) or allow the relay to reset automatically once conditions normalize, depending on your configuration.

Q: When should the D2 EFR1 relay be used in electrical installations?

A: This relay is ideal for installation in industrial electrical systems requiring earth leakage protection. It should be used whenever sensitive ground fault monitoring is necessary to prevent hazardous conditions and safeguard both personnel and equipment from electrical faults.

Q: What enclosure protection ratings does the relay offer and why is this important?

A: The relay provides IP20 protection for its terminals and IP40 protection for its enclosure, ensuring a high level of safety against accidental contact or ingress of foreign objects and dust. These ratings are crucial for maintaining long-term reliability in industrial environments.

Q: How does the trip indication feature help with fault management?

A: The LED trip indication immediately alerts operators when a ground fault occurs, enabling prompt corrective action. This visual feedback is vital for minimizing downtime and ensuring rapid isolation of electrical issues.