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Y501/Y502 Smart Circuit Breaker Specification
| Y501 (1P) | Y502 (2P) |
|---|---|
Table of Contents
- Overview
- Ordering Information
- Key Features
- Technical Specifications
- Interface & Pin Description
- Mechanical & Environmental
- Functions
1. Overview
The Y501/Y502 series are RS485 Modbus-RTU smart circuit breakers for AC 50/60Hz, 230V low-voltage distribution systems.
| Model | Poles | Rated Voltage | Typical Application |
|---|---|---|---|
| Y501 | 1P | AC 230V | Single-phase lighting, socket circuits |
| Y502 | 2P | AC 230V | Single-phase equipment, HVAC circuits |
Positioning Highlights
- Remote Control: Close/open via RS485 Modbus commands
- Metering (Metering version): Real-time voltage, current, power, and energy measurement
- Leakage Protection (RCBO version): Built-in residual current detection with auto-trip
- Smart Distribution: Ideal for smart buildings, industrial control, and energy management
2. Ordering Information
2.1 Model Naming
Y50X-YYY-ZZZ
- X: Poles (1=1P, 2=2P)
- YYY: Rated current (010/016/025/032/040/050/063)
- ZZZ: Version
- Basic: Remote control only
- Metering: Adds voltage, current, power, energy measurement
- RCBO: Adds residual current (leakage) protection
2.2 Package Contents
Circuit breaker, quick start guide, warranty card. Optional accessories: USB-RS485 converter, DIN rail mounting kit.
3. Key Features
- Remote Control — Modbus-RTU protocol for remote close/open and broadcast control
- Energy Metering (Metering version) — Real-time voltage, current, active/reactive/apparent power, power factor, energy
- Leakage Protection (RCBO version) — Built-in RCD with readable leakage value
- Temperature Monitoring — Real-time breaker temperature to prevent overheating
- Frequency Detection — Real-time grid frequency reading
- Interlock Function — Prevents closing when locked, ensuring safety
- DIN Rail Mounting — Standard 35mm rail for easy integration
4. Technical Specifications
4.1 Electrical Parameters
| Parameter | Y501 (1P) | Y502 (2P) |
|---|---|---|
| Rated Voltage | AC 230V | AC 230V |
| Frequency | 50/60 Hz | 50/60 Hz |
| Rated Current | 10/16/25/32/40/50/63 A | 10/16/25/32/40/50/63 A |
| Breaking Capacity | 6 kA | 6 kA |
| Mechanical Life | ≥10,000 cycles | ≥10,000 cycles |
| Electrical Life | ≥6,000 cycles | ≥6,000 cycles |
4.2 Metering Parameters (Metering Version)
| Parameter | Specification |
|---|---|
| Voltage Range | 0–300 V AC |
| Voltage Accuracy | ±1% |
| Current Range | 0–Rated current |
| Current Accuracy | ±1% |
| Power Measurement | Active, reactive, apparent power |
| Energy Metering | Cumulative active energy (kWh) |
| Power Factor | 0.00–1.00 |
4.3 Communication Parameters
| Parameter | Specification |
|---|---|
| Interface | RS485 (2-wire) |
| Protocol | Modbus-RTU |
| Default Address | 1 |
| Baud Rate | 9600 bps (supports 600–230400) |
| Data Format | 8 data bits, no parity, 1 stop bit |
| CRC | CRC16, low byte first |
4.4 Environmental Parameters
| Parameter | Specification |
|---|---|
| Operating Temperature | -5°C ~ +40°C |
| Storage Temperature | -25°C ~ +70°C |
| Max Operating Temperature | +70°C |
| Relative Humidity | ≤50% (at +40°C) |
| Altitude | ≤2000 m |
| Protection Rating | IP20 |
5. Interface & Pin Description
5.1 Terminal Description
| Terminal | Description |
|---|---|
| L (Line In) | Live wire input |
| N (Line In) | Neutral wire input (2P models) |
| L (Load Out) | Live wire output |
| N (Load Out) | Neutral wire output (2P models) |
| A | RS485 A+ |
| B | RS485 B- |
| GND | Communication ground |
5.2 Wiring Guidance
- Use conductors rated for the breaker's current capacity
- Use shielded twisted pair for RS485; add 120Ω termination at bus ends
- Keep communication wires away from power cables
- Ensure proper grounding
6. Mechanical & Environmental
6.1 Dimensions
| Model | Width | Height | Depth |
|---|---|---|---|
| Y501 (1P) | 18 mm | 80 mm | 66 mm |
| Y502 (2P) | 36 mm | 80 mm | 66 mm |
6.2 Installation
- Standard 35mm DIN rail mounting
- Disconnect power before installation
- Maintain ≥20mm clearance above/below, ≥10mm at sides for heat dissipation
7. Functions
7.1 Remote Control
- Close: Via Modbus coil or holding register write
- Open: Via Modbus coil or holding register write
- Broadcast Control: Address 0 controls all devices simultaneously (no response)
7.2 Interlock Function
- When locked, close commands are ignored
- When unlocked, normal closing is allowed
- Lock status readable via Modbus
7.3 Protection Functions
| Protection Type | Description |
|---|---|
| Overload | Trips when current exceeds rated value |
| Short Circuit | Fast trip on short circuit |
| Leakage | Trips when residual current exceeds threshold (RCBO version) |
- Manufacturer: Hunan Yanji Tech Co.,Ltd
- Email: hi@yengear.com
- Website: www.yengear.com