EARU EAEMP3-100-TY-W Smart Three Phase Energy Meter & Protector User Manual

1. Introduction

The EARU EAEMP3-100-TY-W is a smart three-phase energy meter and protector designed for monitoring and protecting electrical systems. It integrates over/under voltage protection, over/under current protection, delay protection, timer switch functionality, voltage/current imbalance protection, shortage phase protection, phase sequence protection, and bidirectional energy monitoring. This device can be controlled and monitored via WiFi through the Tuya Smart Life app, allowing for remote management and customizable alarm settings.

Figure 1: EARU Smart Three Phase Energy Meter & Protector with Tuya Smart Life App

2. Safety Information

• This product has no isolation function. Always disconnect the upstream circuit breaker before performing any maintenance or repairs.
• The neutral (N) line of this product is directly connected and does not have a disconnection function.
• The protector must be wired strictly according to the markings on the device to ensure correct operation and safety.
• While this product offers limited current protection, it cannot replace dedicated circuit breakers. For short-circuit protection, install appropriate circuit breakers (e.g., DZ47 or C65) at the beginning or end of the line.
• Before use, ensure all clamp screws are tightened to prevent poor connections that could damage the product or pose a safety risk.
• Installation should only be performed by qualified personnel in accordance with local electrical codes and regulations.

3. Specifications

Protection Functions & Adjustable Parameters:

• Upper Voltage Limit: 120-300V (Default: 275V)
• Lower Voltage Limit: 80-210V (Default: 175V)
• Upper Current Limit: 1-100A (Default: 80A)
• Lower Current Limit: 1-100A (Default: 10A)
• High Temperature Alarm: 10-85℃ (Default: 85℃)
• Overcurrent Recovery Power-On Delay Time: 1-9999s (Default: 20s)
• Overcurrent Event Threshold Time: 1-999s (Default: 5s)
• Over and Under Voltage Event Recovery Power-On Delay Time: 1-9999s (Default: 20s)
• Over and Under Voltage Event Time Threshold: 1-9999s (Default: 3s)
• Three-Phase Current Imbalance Alarm: 10-100% (Default: 20%)
• Voltage Three-Phase Imbalance Alarm: 10-100% (Adjustable)
• Lost Current Recovery Delay Time: 1-9999s (Default: 20s)
• Time Threshold of Lost Flow Event: 1-999s (Default: 10s)
• Power Display Range: 0-9999999.9kWh
• Reclosing Allowed Times: 1-30 (Default: 1)
• Reclose Recover Seconds: 1-99 (Default: 1)
• Power-On Delay Power-On-Time: 1-9999 (Default: 5)

Figure 2: Device Dimensions and Key Specifications

4. Installation

4.1 Installation Conditions

• Temperature: -20°C to 60°C
• Humidity: <85%
• Altitude: Not exceeding 2000m
• Pollution Level: Level 3
• Installation: 35MM DIN Rail
• Wiring Capacity: Insulated copper wire of 35 mm² or below.

4.2 Wiring Diagram

Connect the device according to the following diagram. Ensure L1, L2, L3 (Input/Output) and N (Input/Output) are correctly identified and connected.

Figure 3: Device Wiring Diagram (80-380VAC)

4.3 Physical Dimensions

Figure 4: Installation Wiring and Dimensions (89.5mm H x 75.3mm W x 58.3mm D)

5. Initial Setup & App Pairing

5.1 WiFi Indicator Status

• Flashing: Indicates the device is searching for a WiFi signal.
• Slow Flashing: Indicates WiFi is offline.
• Long Lights: Indicates WiFi is connected.

5.2 App Pairing (Tuya Smart Life)

1. Ensure the device is powered on and the WiFi indicator is flashing (searching mode).
2. Download and open the Tuya Smart Life app on your smartphone.
3. Tap 'Add Device' or the '+' icon in the app. The app may automatically discover the device.
4. If not automatically discovered, select 'Electrical' -> 'Socket (Wi-Fi)' or similar category.
5. Enter your WiFi network name and password when prompted.
6. Follow the on-screen instructions to complete the pairing process. The WiFi indicator on the device should turn to a long light once connected.

6. Operating Instructions

6.1 Main Functions Overview

The device offers the following main functions:

1. Over Voltage Protection
2. Under Voltage Protection
3. Over Current Protection
4. Under Current Protection
5. Delay Protection
6. Timer Switch
7. Voltage Imbalance Protection
8. Current Imbalance Protection
9. Shortage Phase Protection
10. Phase Sequence Protection
11. Bidirectional Energy Monitor
12. Device Sharing
13. Remote Control
14. Voice Control (via Google Assistant/Amazon Alexa)

Each parameter can be set with an action threshold and enabled/disabled.

Figure 5: Main Functions of the Device

6.2 Display Navigation

Use the Up and Down buttons on the device to switch and display the following parameters:

• Voltage (U)
• Current (I)
• Power Consumption (P)
• Power Factor (COSφ)
• Frequency (Hz)

Figure 6: Examples of Displayed Parameters

6.3 Function Settings (On-Device)

1. Enter Settings: Long press and hold the Setting button (gear icon) to enter the setting status display page. The current data bit will flash.
2. Adjust Value: Use the Up and Down buttons to change the value of the flashing data bit.
3. Switch Bit/Parameter: Short press the Setting button to move to the next data bit or parameter.
4. Confirm & Next Page: Short press the OK button to confirm settings on the current page and jump to the next settings page.
5. Exit & Save: Long press the OK button to exit the setting state and save all changes.

Figure 7: On-Device Function Setting Flow

6.4 App-Based Settings & Monitoring

The Tuya Smart Life app provides comprehensive control and monitoring features:

• Real-time Data: View total forward energy, reverse energy, current, power, and voltage.
• Energy Statistics: Access daily, monthly, and yearly energy consumption data.
• Expense Management: Enable prepayment, set balance energy (kWh), charge energy, view recharge records, and clear energy data.
• Scheduling: Set countdown timers, schedules (on/off times for specific days), cycle timers (start/end duration), and inching (automatic turn off after a period).
• Alarm Settings: Configure thresholds and enable/disable alarms for high temperature, over current, overvoltage, undervoltage, three-phase current imbalance, three-phase lack of phase, reverse phase sequence, voltage three-phase imbalance, lost flow, and their respective recovery delays and event time thresholds.
• Operation Records: View a log of device operations (e.g., open/close events, alarms).

Figure 8: Tuya Smart Life App Interface for Monitoring and Control

6.5 Backlight Information

• Light Up Time: The display will remain lit for 180 seconds without any user actions.
• Color: The backlight is white during normal operation. It will turn red when the internal relay is disconnected (e.g., due to a protection event).

Figure 9: Red Display Indicating Power Failure/Relay Disconnection

7. User Tips

• Neutral Connection: This device is designed for 3 Phase + Neutral (3P+N) systems. If your installation only has L1, L2, L3 phases without a neutral line, this meter may not function correctly as it requires a neutral connection for proper operation and measurement.
• Password Protection: Utilize the password setting feature in the app to prevent unauthorized changes to critical alarm thresholds and operational settings.
• Regular Monitoring: Periodically check the energy statistics and operation records in the app to understand your energy consumption patterns and review any protection events.

8. Troubleshooting

8.1 Fault Record

The device records various fault events, which can be viewed in the Tuya app. These include:

• Overvoltage
• Undervoltage
• Overload
• Low Current protection
• Voltage Imbalance
• Current Imbalance
• Phase Sequence Protection

8.2 Common Issues and Solutions

• Device not powering on: Check the main power supply and ensure all wiring connections are secure and correct.
• WiFi indicator flashing slowly (offline): Ensure your WiFi router is on and within range. Re-attempt app pairing if necessary.
• Display is red: This indicates the internal relay has disconnected due to a protection event (e.g., overvoltage, overcurrent). Check the alarm records in the app to identify the cause. The device may reclose automatically after the set recovery delay time, or you may need to manually reset it via the app or device buttons if reclosing is disabled or allowed times are exceeded.
• Incorrect readings: Verify that the current transformers (if external) are correctly installed and oriented, and that the wiring matches the diagram.
• Device not responding to app commands: Check WiFi connectivity. If the device is online, try restarting both the device and the app.

9. Maintenance

• Keep the device clean and free from dust and moisture.
• Do not expose the device to extreme temperatures or direct sunlight for prolonged periods.
• Regularly check wiring connections for tightness to prevent loose contacts.
• Ensure proper ventilation around the device to prevent overheating.
• For any internal repairs, always consult a qualified electrician and ensure the main power supply is disconnected.

10. Warranty and Support

10.1 Product Guarantee

Within 12 months from the date of production, if there are any product quality issues and the seal is intact, our factory will provide free replacement. Within 36 months, if there are product quality issues and the seal is intact, our factory will provide free repair.

10.2 Manufacturer Contact Information

ZHEJIANG EARU ELECTRONICS CO.,LTD

• Address: GUACHUAN ROAD 228 1ST, LIUSHI TOWN, YUEQING CITY, ZHEJIANG PROVINCE, CHINA, 325604
• Website: https://shop28909b0b26794.1688.com/
• Manager: Bob Wu
• Email: 415529869@qq.com
• Phone Number: +86 15821639630
• WeChat ID: totybest-2

Figure 10: WeChat QR Code

For further assistance, you may also refer to the official user manual PDF: Download User Manual (PDF)