3-Phase Adjustable Voltage & Current Relay Protector (63A / 100A)
Protect your three-phase electrical systems and sensitive equipment with this advanced Intelligent 3-Phase Voltage and Current Relay Protector. Designed for full protection, real-time monitoring, and complete parameter customization, this unit prevents costly damage caused by power surges, voltage drops, phase imbalance, and overcurrent conditions.
Key Highlights & Features
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Dual Operating Modes (ASY & SYN):
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Synchronous Mode (SYN): Cuts off or restores all three phases simultaneously when a fault is detected, protecting 3-phase machinery and balanced loads.
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Asynchronous Mode (ASY): Operates each phase independently, ideal for split single-phase distribution.
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Comprehensive Electrical Protection: Full protection against Over-Voltage, Under-Voltage, Over-Current, Voltage Imbalance, and Phase Sequence errors.
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Fully Adjustable Parameters: Tailor voltage limits, current limits, action delay times, and recovery times to your precise load requirements.
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Real-Time LED Display: Clear digital readout showing real-time voltage and current levels across all three phases (L1, L2, L3).
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Manual Calibration Support: Adjust and calibrate voltage and current reading offsets directly from the interface for pinpoint accuracy.
Key Technical Specifications
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Rated Voltage: AC 3×230V / 400V (3P+N)
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Rated Current Options: 1A–63A or 1A–100A (Adjustable)
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Operating Modes: ASY / SYN Switchable
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Mounting: Standard 35mm DIN Rail
Parameter Settings Reference Chart
Here are the recommended factory default settings for standard 230V single-phase / 400V 3-phase domestic and commercial applications:
| Code |
Parameter Description |
Recommended Setting |
Setting Range |
| P1 |
Power-On Delay Time |
10s |
1–500s |
| U1 |
Over-Voltage Protection Value |
270V |
230–300V |
| U2 |
Over-Voltage Recovery Value |
265V |
220–295V |
| U3 |
Over-Voltage Recovery Delay Time |
30s |
1–500s |
| U4 |
Over-Voltage Protection Action Time |
0.1s |
0.1–30s |
| U5 |
Under-Voltage Protection Value |
170V |
140–210V |
| U6 |
Under-Voltage Recovery Value |
175V |
145–215V |
| U7 |
Under-Voltage Recovery Delay Time |
30s |
1–500s |
| U8 |
Under-Voltage Protection Action Time |
0.5s |
0.1–30s |
| U9 |
Voltage Calibration / Deviation |
0.0% (Adjust only if meter reads wrong) |
-9.5% to +9.5% |
| U10 |
Three-Phase Unbalance Value |
20V |
20–99V |
| U11 |
Voltage Imbalance Recovery Value |
15V |
15–94V |
| U12 |
Phase Sequence Protection |
ON |
ON / OFF |
| C1 |
Over-Current Protection Value |
63A (or 100A based on model) |
1–63A / 100A / OFF |
| C2 |
Over-Current Recovery Delay Time |
30s |
1–500s |
| C3 |
Over-Current Protection Action Time |
1.0s |
0.1–30s |
| C4 |
Current Calibration / Error Value |
0.0% (Adjust only if meter reads wrong) |
-9.5% to +9.5% |
| C5 |
Continuous Over-Current Trip Counter |
3 |
1–20 / OFF |
| CEL |
Control Mode Selection |
SYN (for 3-phase loads like motors) or ASY (for single-phase loads) |
ASY / SYN |
How to set up your device:
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Enter Setting Mode: Press and hold the SET button for about 3 seconds until the display shows P1.
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Navigate & Adjust:
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Press SET repeatedly to cycle through parameters (P1, U1, U2, etc.).
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Use the Up (▲) and Down (▼) arrow keys to change values.
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Save Settings: Leave the buttons untouched for 5–10 seconds. The screen will automatically save and exit to the main display.
