40A/63A DIN Rail Adjustable Voltage & Current Protective Relay
40A/63A DIN Rail Adjustable Voltage & Current Protective Relay
40A/63A DIN Rail Adjustable Voltage & Current Protective Relay
Keep your electrical circuits safe and operating within optimal parameters with this versatile DIN Rail-mounted protective relay. Featuring dual real-time displays, fully adjustable thresholds, and an embedded RTOS for high stability, this device is the smart choice for homeowners, electricians, and industrial users who demand reliable circuit monitoring and automatic protection.
Made in Mainland China.
Key Features
- Dual Display: Simultaneously monitors and shows live voltage and current readings for at-a-glance circuit oversight.
- Fully Adjustable Thresholds: Set your own overvoltage, undervoltage, and overcurrent limits to match your specific equipment requirements.
- Multi-Mode Display: Switch between voltage, current, frequency, and active power readouts with ease.
- Manual & Automatic Recovery: Choose between manual reset after a protection event or automatic reconnection once conditions normalize.
- Set Lock: Parameter lock prevents accidental changes to your configured protection settings.
- Energy-Saving Mode: Dims the display when the protector is idle to reduce power consumption.
- Embedded RTOS: Real-Time Operating System improves system performance, stability, and long-term maintainability.
- DIN Rail Mount: Standard rail mounting for fast, tool-friendly installation in electrical panels and enclosures.
Protection Functions
- Overvoltage protection (adjustable: 130–300 V, default: 270 V)
- Undervoltage protection (adjustable: 80–210 V, default: 170 V)
- Overcurrent protection (40 A model: 1–40 A adjustable; 63 A model: 1–63 A adjustable)
- Continuous overcurrent counting
- Fast protection for power-failure and abnormal supply events
- DC mode support (current/power display inactive in DC mode)
Technical Specifications
| Power Supply | 230 VAC, 50/60 Hz |
| Max. Load Current | 1–40 A adjustable (40 A model) / 1–63 A adjustable (63 A model) |
| Overvoltage Range | 130–300 V (default 270 V) |
| Undervoltage Range | 80–210 V (default 170 V) |
| Effective AC Voltage Range | AC 80–300 V (1% calibratable) |
| Effective AC Current Range | AC 0.1–40 A / 0.1–63 A (1% calibratable) |
| Effective DC Voltage Range | DC 80–300 V |
| Frequency Range | 40–70 Hz (1% calibratable) |
| Screen Refresh Rate | >1000 Hz |
| Measurement Algorithm | True RMS (Root Mean Square) |
| Hysteresis (Return Difference) | 5 V fixed |
| Timer Range | 1–999 seconds |
| Action Time | 0.1–10.0 seconds |
| Mounting | Standard DIN Rail |
Package Contents
- 1× Over/Under Voltage & Overcurrent Protective Relay Device
Important Notes
Colors may vary slightly due to screen calibration and lighting conditions. Allow 1–10 mm variance due to manual measurement. Always consult a qualified electrician for installation in mains-connected panels. For electrical safety guidelines, refer to the OSHA Electrical Safety standards.
Frequently Asked Questions
Q: What is the difference between the 40A and 63A models of this DIN Rail protective relay?
A: The two models differ in their maximum rated load current. The 40A model supports adjustable overcurrent protection from 1–40 A, while the 63A model covers 1–63 A. Both share the same overvoltage, undervoltage, display, and feature set — choose based on the maximum load current of your circuit.
Q: Can this protective relay device be used with DC circuits?
A: Yes. The device supports a DC effective voltage range of 80–300 V. Note that in DC mode, the current and power display readings are inactive; only voltage monitoring is available.
Q: How do I prevent accidental changes to my protection settings?
A: The device includes a built-in Set Lock feature. Once enabled, the lock prevents any accidental modification of your configured overvoltage, undervoltage, and overcurrent thresholds, ensuring your protection parameters remain exactly as you set them.
Q: Does this relay support automatic recovery after a protection event?
A: Yes. The device offers both Manual and Automatic Recovery modes. In automatic mode, the relay reconnects once the voltage or current returns to within the safe range. In manual mode, the user must physically press the switch button to restore output after a protection event.