Modular residual current monitoring relay | earth leakage current monitoring relay | 110/230VAC | adjustable 30mA–30A | DIN rail mounting | 1NO+1NC

Technical Specifications

Product type: Earth leakage / insulation monitoring relay
Supply voltage: 110/230VAC
Frequency: 50/60Hz
Sensitivity adjustment range: 30mA – 30A
Trip level: adjustable
Maximum contact load: 6A
Contact configuration: 1NO + 1NC
Contact material: silver alloy
Response time: ≤15ms
Power consumption: <3VA
Protection type: sealed
Housing type: mini modular
Mounting: DIN rail in electrical distribution board
Color: white
Weight: ~0.3kg
Application: automatic control, protection and monitoring systems

Functions

Leakage current detection – continuously monitors whether dangerous current leakage to earth appears in the electrical circuit
Adjustable sensitivity 30mA–30A – allows setting the desired tripping threshold according to system requirements
Automatic emergency response – when the set leakage level is reached, the relay immediately transmits a control signal
Power disconnection control – can control a contactor or other protective device to interrupt electrical supply
Alarm activation – suitable for audible or visual warning in case of fault
PLC / automation system signal – can be integrated into control and monitoring systems
Fast operation ≤15ms – ensures rapid reaction to dangerous leakage
Universal 110/230VAC supply – suitable for use in different control circuits
DIN mounting – compactly mounted in standard electrical panels
Preventive equipment protection – helps detect insulation faults before a serious авария occurs

Usage

For household users: suitable for additional protection of home, garage, basement, workshop or outdoor installations against dangerous electrical leakage and possible insulation faults
For farmers / owners of technical rooms: helps safely monitor electrical circuits of pumps, grain ventilators, refrigeration or other moisture-sensitive equipment
For electricians: practical solution when assembling electrical panels where adjustable leakage monitoring and an additional emergency control signal are required
For automation specialists: the relay can be easily integrated into PLC, alarm, contactor or remote monitoring systems
For industrial engineers: used for insulation condition monitoring of production lines, motors, heating, ventilation and other loads
For building maintenance specialists: helps to detect aging electrical installations, moisture damage and reduce accident risk at an early stage

Advantages

Very wide leakage current adjustment range 30mA–30A
Fast ≤15ms response
Suitable for both household and industrial protection
Universal 110/230VAC supply
1NO+1NC contacts allow many connection options
Compact DIN module
Low power consumption <3VA
Sealed construction for longer service life
Suitable for integration into automation systems

Disadvantages

For full operation, an external current transformer / toroidal ring is usually required
No digital display for viewing leakage indication
Requires correct sensitivity adjustment according to the system
Qualified wiring is recommended for professional industrial use

Does this relay disconnect the electricity by itself?
The relay sends a control signal to a contactor, circuit breaker or alarm system, therefore it can initiate automatic power disconnection.

Can the tripping sensitivity be adjusted?
Yes, the leakage current trip threshold is adjustable in a wide range from 30mA to 30A.

Where is this relay most commonly used?
It is used in electrical panels, industrial automation equipment, protection of pumps, motors, ventilation systems and household electrical installations.

Is it suitable for use with a 230V network?
Yes, the relay operates with both 110VAC and 230VAC supply voltage.