Reletek RD-MVA 63A | Over and Undervoltage single phase
Reletek RD-MVA 63A | Single-Phase Over and Undervoltage Protector
1. Overview
The Reletek RD-MVA 63A is a digital voltage and current protection relay designed to safeguard single-phase electrical systems and home appliances—such as refrigerators, air conditioners, washing machines, televisions, and audio equipment—from harmful voltage fluctuations and overcurrent conditions.
2. Key Features
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Microcontroller-Based Design: Ensures precise monitoring and protection against voltage and current anomalies.
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Dual 3-Digit Display: Provides real-time voltage readings for accurate monitoring.
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Adjustable Settings:
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Overvoltage Protection: Settable between 220V and 280V.
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Undervoltage Protection: Settable between 140V and 210V.
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Reset/Start Delay: Adjustable from 5 to 600 seconds, allowing customization based on specific requirements.
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Trip Delays:
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Overvoltage Trip Delay: Less than 0.5 seconds.
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Undervoltage Trip Delay: 0.5 seconds for voltages ≥120V; 0.1 seconds for voltages <120V.
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Overcurrent Trip Delay: Adjustable between 5 to 600 seconds.
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Voltage Measurement Accuracy: Within 2% across the entire range.
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Output Contact: Equipped with 1 Normally Open (NO) contact.
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Mounting: Designed for DIN rail installation, facilitating easy integration into electrical panels.
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Protection Degree: Rated at IP20, suitable for indoor environments.
3. Applications
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Residential and Commercial Electrical Systems: Protects appliances and equipment from voltage sags, surges, and overcurrent situations.
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Industrial Equipment: Ensures machinery operates within safe voltage and current parameters, preventing potential damage.
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HVAC Systems: Safeguards heating, ventilation, and air conditioning units from electrical anomalies.
4. Benefits
Enhanced Equipment Longevity: By preventing exposure to harmful voltage and current levels, the RD-MVA 63A extends the lifespan of connected devices. ✔ Customizable Protection: Adjustable settings allow users to tailor protection parameters to specific needs. ✔ User-Friendly Interface: The dual display and LED indicators provide clear status updates and fault indications. ✔ Reliable Performance: Microcontroller-based design ensures accurate detection and rapid response to electrical faults.
| Rated supply voltage | AC 220V |
| Operation voltage range | AC 100V~400V |
| Rated frequency | 50/60Hz |
| Overvoltage(U>)setting range | 220~280V |
| Undervoltage(U<) setting range | 140~210V |
| Hysteresis | ﹥U:5V; <U:3V |
| Reset/start delay | Ts: 5s~600s |
| Overcurrent faults trip delay range | Ta: 5s~600s |
| Overvoltage（U>) trip delay | <0.5s |
| Undervoltage（U<） trip delay | ≥120V:0.5s,<120V: 0.1 s |
| Overcurrent（l>) trip delay | ln<lr *<lmax: Ta; Ir *≥lmax:≤0.1s |
| Voltage measurement accuracy | 2%(over the whole range) |
| Rated insulation voltage | 400V |
| Output contact | 1NO |
| Electrical life | 105 |
| Mechanical life | 106 |
| Protection degree | IP20 |
| Pollution degree | 3 |
| Altitude | ≤2000m |
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