The OLS Analog Single-Phase Load Monitoring Relay, developed by Borna Electronics, is a simple, reliable, and cost-effective solution for overcurrent protection of single-phase electrical loads up to 4 kW. Designed for ease of installation and operation, the relay eliminates the need for an external contactor in many applications, reducing wiring complexity and system costs.
The relay features an adjustable current threshold from 5 A to 20 A and provides dependable protection against overload conditions. With selectable operating modes and automatic fault recovery functions, the OLS relay is ideal for protecting a wide range of single-phase equipment.
Features
- Overcurrent protection for single-phase electrical loads
- Suitable for loads up to 4 kW
- No external contactor required
- Adjustable current setting from 5 A to 20 A
- Selectable automatic reset and latching operating modes
- Built-in trip delay following overcurrent conditions
- Automatic reconnection after fault clearance
- Two LED indicators: FAULT (Overcurrent Condition) and OUT (Output Status)
Technical Specifications
| Parameter | Specification |
| Network Voltage | 220 VAC ±15% |
| Network Frequency | 50 Hz ±5% |
| Internal Power Consumption | Approx. 3 W |
| Current Setting Range | 5–20 A |
| Trip Delay | Approx. 10 seconds |
| Protection Degree | IP20 according to IEC 60529 |
| Operating Temperature | -20°C to +60°C |
| Relative Humidity | 15% to 85% |
| Mounting Method | DIN Rail according to IEC 60715 |
| Output Current | 20 A |
Applications
- Single-phase motors
- Water pumps
- HVAC equipment
- Industrial and commercial electrical loads
- Protection of loads up to 4 kW
- Applications requiring direct load switching without a contactor
The OLS Single-Phase Load Monitoring Relay provides dependable overload protection while offering a compact and economical alternative to traditional motor protection solutions.