KAR1 Earth Leakage Relay (ELR)
Advanced Earth Leakage Protection Relay with Adjustable Current & Time Delay
The KAR1 Earth Leakage Relay (ELR) is an advanced residual current monitoring relay designed to detect earth leakage faults and disconnect the electrical system before hazardous conditions occur. Working together with an external Core Balance Current Transformer (CBCT), KAR1 provides reliable personnel protection, equipment protection, and fire prevention in industrial and commercial installations.
Its adjustable leakage current threshold, configurable time delay, visual leakage indication, and remote reset capability make it an ideal solution for electrical panels, industrial machinery, switchgear, motor control centers, generators, UPS systems, and renewable energy applications.
Key Features
Adjustable Earth Leakage Current
Set the trip threshold anywhere between:
30mA – 30A
Suitable for personnel protection, equipment protection, and fire prevention applications.
Adjustable Time Delay
Configurable trip delay:
0 – 10 Seconds
Helps prevent nuisance tripping while maintaining reliable protection.
Visual Leakage Level Monitoring
Integrated 4-stage LED indication:
- 25% Leakage Level
- 50% Leakage Level
- 75% Leakage Level
- 100% Leakage Level
Provides early warning before a trip occurs.
Test & Reset Functions
- Front Panel Test Button
- Front Panel Reset Button
- Remote External Reset Input
Allows easy commissioning and maintenance testing.
High Reliability Protection
- Type A Earth Leakage Detection
- Fast Response Time (<50ms)
- DIN Rail Mounting
- Industrial Design
- Made in Türkiye
Technical Specifications
| Parameter | Value |
|---|---|
| Model | KAR1 |
| Product Type | Earth Leakage Relay (ELR) |
| Supply Voltage | 220V AC ±20% |
| Frequency | 50/60 Hz |
| Leakage Current Setting | 30mA – 30A |
| Time Delay Setting | 0 – 10 s |
| Response Time | <50 ms |
| Power Consumption | <6 VA |
| Relay Output | 1 SPDT |
| Contact Rating | 7A / 250V AC |
| Detection Type | Type A |
| Current Accuracy | 3% |
| Display | 4 Leakage LEDs + PWR + TRIP |
| Reset Method | Manual or Remote |
| Test Function | Manual |
| Housing Protection | IP20 |
| Housing Material | UL94-V0 Flame Retardant |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Standard | EN / IEC 60947-2 |
Front Panel Functions
Set Current
Adjustable leakage current trip setting:
30mA, 100mA, 300mA, 500mA, 1A, 3A, 5A, 10A, 20A, 30A
Set Time
Adjustable delay:
0 – 10 Seconds
LED Indicators
PWR LED
- Green ON = Device Energized
Leakage Level LEDs
- 25%
- 50%
- 75%
- 100%
TRIP LED
- Indicates fault condition and relay trip
Applications
The KAR1 Earth Leakage Relay is suitable for:
- Electrical Distribution Panels
- Motor Control Centers (MCC)
- Switchboards
- Industrial Machinery
- HVAC Systems
- Pumps & Motors
- Generator Systems
- UPS Installations
- Solar Power Systems
- Data Centers
- Manufacturing Plants
- Commercial Buildings
- Water Treatment Facilities
Benefits
Personnel Safety
Protects personnel from dangerous earth leakage currents.
Equipment Protection
Prevents damage caused by insulation failures and leakage faults.
Fire Prevention
Detects leakage currents before they develop into fire hazards.
Reduced Downtime
Visual leakage monitoring allows preventive maintenance before shutdowns occur.
Flexible Configuration
Adjustable sensitivity and time delay enable adaptation to different applications.
CBCT Compatibility
The KAR1 operates with external Core Balance Current Transformers (CBCTs).
Available toroidal CBCT sizes:
- CBCT-1-25
- CBCT-1-45
- CBCT-1-80
- CBCT-1-100
- CBCT-1-150
- CBCT-1-210
- CBCT-1-310
Available Split-Core Models:
- KCBCT-1-20-10
- KCBCT-1-30-10
- KCBCT-1-36-10
- KCBCT-1-50-10
Typical Installation
The KAR1 continuously monitors the residual current measured by an external CBCT installed around all active conductors (L1, L2, L3 and N). When leakage current exceeds the configured threshold, the relay activates its output and trips the connected circuit breaker.
Why Choose KAR1?
- Adjustable Leakage Current 30mA–30A
- Adjustable Time Delay 0–10s
- Type A Residual Current Detection
- Remote Reset Capability
- Fast Response Time
- Visual Leakage Level Monitoring
- Industrial-Grade Reliability
- DIN Rail Mounting
- Compatible with Wide Range of CBCTs
- Designed & Manufactured in Türkiye
