1. Úvod
The EARU PC321-TY Power Clamp is designed to monitor electricity usage in your facility by connecting current transformer clamps to the power cables. It can measure Voltage, Current, Active Power, Power Factor, and total energy consumption in real-time. This device is compatible with both single-phase and three-phase electricity systems.
Tato příručka poskytuje přesview of the product and assists with the initial setup and installation.
Klíčové vlastnosti:
- Tuya compliant, supporting Tap-to-Run and automation with other Tuya devices.
- Compatible with Single/3-phase electricity.
- Měří v reálném čase svtage, Current, Active Power, and total energy consumption.
- Suitable for both residential and commercial applications.
- Lehký a snadno se instaluje.
- Externí anténa zabraňuje stínění signálu.
Note: The bidirectional measurement function only supports the WiFi version and does not support the ZigBee version.
2. Bezpečnostní zacházení
WARNING: Failure to follow these safety notices could result in fire, electric shock, other injuries, or damage to the Power Clamp a další majetek. Před použitím Power Cl si přečtěte všechna níže uvedená bezpečnostní upozorněníamp.
- Výkon třamp must be installed and serviced only by qualified electrical personnel.
- Během testování se nedotýkejte svorek zařízení.
- Turn off all power supply for this equipment before installing.
- Před připojením nebo odpojením pomocného zařízení se ujistěte, že je napájecí zdroj vypnutý.
- Vždy používejte správně dimenzovaný objemtagSnímací zařízení pro potvrzení vypnutí napájení.
- Replace all devices, doors, and covers before applying power to the equipment.
- Vyhněte se vysoké vlhkosti nebo extrémním teplotám.
- Vyhněte se dlouhodobému vystavení přímému slunečnímu záření nebo silnému ultrafialovému světlu.
- Nenechejte jednotku spadnout ani ji nevystavujte silným vibracím.
- Jednotku nerozebírejte ani se nepokoušejte sami opravit.
- Nevystavujte jednotku ani její příslušenství působení hořlavých kapalin, plynů nebo jiných výbušnin.
3. Konec produktuview
Familiarize yourself with the components of your energy meter:


Komponenty:
- Hlavní jednotka: The central processing unit for energy measurement.
- CT (Current Transformer) Clamps: Used to measure current flow in power cables. The device supports 3 CT clamps.
- Externí anténa: For wireless communication (WiFi or ZigBee).
- AC Input Cable: Pro napájení zařízení.
- LED indikátor: Provides status feedback (Red LED flashing: Device not joined to ZigBee network; Green LED solid on: Device joined to ZigBee network).
- Resetovací tlačítko: Located on the back of the main unit. Press and hold for 5 seconds to restore factory settings (energy data will not be cleared). Press twice consecutively within 10 seconds to clear energy data.
4. Technické specifikace
| Funkce | Specifikace |
|---|---|
| Číslo modelu | PC321-TY |
| Název značky | EARU |
| Napájení | AC |
| Výstupní objemtage | 100-240V AC 50 / 60 Hz |
| Jmenovitý proud | 80A-1000A (Optional) |
| Max. provozní proud | 150A & Above |
| Třída přesnosti | 1% |
| Fáze | Třífázový |
| Provozní teplota | -20 ℃ - +55 ℃ |
| Provozní vlhkost | ≤ 90 % nekondenzující |
| Rozměry | 86 * 86 * 37 mm |
| Bezdrátová frekvence | WiFi 2.4GHz IEEE 802.15.4 |
| Protokol | ZigBee 3.0 |
| Report Cycle | 5 sekund |
| Osvědčení | CE, RoHS |
| Baterie je součástí dodávky | Žádný |
CT Clamp Specifikace:

| Model | 80A | 120A | 200A | 300A | 500A | 750A | 1000A |
|---|---|---|---|---|---|---|---|
| Φ (vnitřní průměr) | 10 mm | 16 mm | 24 mm | 24 mm | 36 mm | 50 mm | 50 mm |
| A | 34 mm | 37 mm | 53 mm | 53 mm | 68 mm | 93 mm | 93 mm |
| B | 24 mm | 30 mm | 45 mm | 45 mm | 59 mm | 82 mm | 82 mm |
| C | 42 mm | 51 mm | 65 mm | 65 mm | 90 mm | 122 mm | 122 mm |
| E | 32 mm | 43 mm | 44 mm | 44 mm | 53 mm | 70 mm | 70 mm |
| G | 26 mm | 34 mm | 34 mm | 34 mm | 42 mm | 60 mm | 60 mm |
5. Instalace a zapojení
Important: Please make sure the main power in your facility is OFF before installing. Failure to follow these instructions will result in death or serious injury.
5.1. Montáž zařízení
Power Clamp unit has a mounting bracket for installation:
- Use the mounting bracket as a template to mark two holes on the wall for screws.
- Secure the mounting bracket onto the wall using screws. Install wall plugs if necessary.
- Align the hooks of the mounting bracket with the mounting holes on the Power Clamp unit. Fit the hooks into the mounting holes to secure the device.

5.2. Pokyny pro zapojení
Postupujte podle níže uvedených schémat jako příkladample k zapojení Power Clamp for different phases.
5.2.1. Connecting AC Input Cable
- Connect the AC Input cable to a socket near the Electrical Box to power on the Power Clamp podle příslušného schématu fázového zapojení.
- Attach both ends of the Current Transformer Cables. Spin the waterproof latch clockwise until both ends are tightened and secured.

5.2.2. Connecting CT Clamps
Otevřete třamp and apply it to the electric meter cable. The arrow on the clamp should face the correct direction of the electricity current flow (P1→P2). If the arrow faces the reverse direction, the reading meter will display 0.

Důležitá poznámka:
- The phase of the circuit measured by the CT needs to be consistent with the power supply phase of that CT. For example, if the CT of L1 measures the L1 circuit, the power supply for L1 must also be connected to the L1 phase. You cannot clamp the CT of L1 on the L2 phase if the power supply of L1 is still connected to the L1 phase.
- Ujistěte se, že třamp of L1/L2/L3 corresponds to L1/L2/L3 of the circuit to be tested.
- Šipka na třamp should face the correct direction of the electricity current flows.
5.2.3. Schémata zapojení
3 Phase electricity wiring diagram:

Video Tutorial for Wiring:
Video 1: Step-by-step guide on wiring the energy meter in a three-phase electrical box. It demonstrates connecting neutral and phase wires, and correctly installing CT clamps with attention to current direction.
6. Konfigurace sítě
The device can be configured via the Smart Life App. Ensure your wireless router operates on 2.4GHz.
6.1. Stáhněte si aplikaci Smart Life
Download the "Smart Life" application from your App Store or Google Play Market. You can also scan the QR code below to download and install.

6.2. Pairing Method 1 (Scan)
- Open the Smart Life app and click the 'Scan' button in the upper right corner of the App Home page.
- Scan the QR code provided in the manual (or on the device/packaging) to configure the network.
6.3. Pairing Method 2 (ZigBee Gateway)
Note: This method is for the ZigBee version and requires a dedicated ZigBee gateway.
- Make sure your Tuya ZigBee gateway is successfully connected to your Smart Life App.
- Zajistěte napájení třamp je v dosahu signálu vaší Tuya ZigBee Gateway.
- Zapněte napájení třamp. If the LED indicator is not flashing red, reset the device (press and hold the reset button for 5 seconds).
- Enter your ZigBee gateway settings in the Smart Life App and set it to permit joining to add a subdevice.
- After a few seconds, the power clamp will automatically join the gateway. Once successfully added, you will see the new power clamp in the Smart Life App.
7. Návod k obsluze
Once installed and configured, the EARU PC321-TY energy meter allows you to monitor various electrical parameters through the Smart Life App.
7.1. Monitorování v reálném čase
Monitor Current, Active Power, Voltage, and Power Factor in real-time. Daily, weekly, and monthly consumption and production data can be viewed with charts in the Tuya App. This allows you to see how much electricity you are consuming, when, and how much excess energy you are producing back to the grid.

7.2. Bidirectional Measurement (WiFi Version Only)
The WiFi version supports bidirectional measurement, allowing you to track both energy consumption ("From Grid" energy) and energy production ("To Grid" energy), which is particularly useful for solar panel installations.

- Klip Clamp1 onto Grid: Measures "From Grid" or "To Grid" energy. If the measured current direction is P1→P2, energy is accumulated as "From Grid" energy. If P2→P1, energy is accumulated as "To Grid" energy.
- Klip Clamp2 onto Inverter: Measures how much energy is generated by the inverter. The clamp direction needs to point to the Inverter.
- Klip Clamp3 onto Load: Measures how much energy is consumed by the load. The clamp direction needs to point to the Load.
7.3. Hlasové ovládání
The device supports voice control through intelligent speakers like Amazon Alexa and Google Assistant, allowing for hands-free operation.

8. Údržba
- Udržujte zařízení čisté a bez prachu.
- Nevystavujte zařízení přímému slunečnímu záření, vysoké vlhkosti nebo extrémním teplotám.
- Regularly check wiring connections for tightness and integrity.
- If the device malfunctions, do not attempt to repair it yourself. Contact qualified personnel.
Resetování zařízení:
To restore the power clamp to default factory settings (energy data will not be cleared), press and hold the reset button for 5 seconds until the Red LED indicator flashes 3 times quickly. The device will then enter EZ mode for 3 minutes.

To clear energy data, reset the Power Clamps twice consecutively. The interval between two resets must be less than 10 seconds. After successful operation, the indicator light will flash alternately red and green 3 times.
9. Řešení problémů
| Problém | Možná příčina | Řešení |
|---|---|---|
| Zařízení se nezapíná | No power to AC input cable or faulty connection. | Check AC input cable connection and power source. Ensure main power is on after installation. |
| LED indicator not flashing red during pairing | Device not in pairing mode or already paired. | Press and hold the reset button for 5 seconds to enter pairing mode. |
| Inaccurate readings or 0 display | Incorrect CT clamp direction or phase mismatch. | Ensure the arrow on the CT clamp points towards the load. Verify that the CT clamp for each phase (L1, L2, L3) is connected to its corresponding phase wire. |
| No data in Smart Life App | Device not connected to network or out of range. | Check WiFi (2.4GHz) or ZigBee gateway connection. Ensure device is within signal range. Re-pair if necessary. |
| ZigBee version not showing bidirectional measurement | ZigBee protocol limitation. | Bidirectional measurement is only supported by the WiFi version. This is expected behavior for ZigBee models. |
10. Uživatelské tipy
- Neutral Wire Requirement: The meter requires a neutral wire for accurate voltage, current, and power measurements. Ensure your measured circuit includes a neutral wire.
- CT Clamp Směr: Always double-check the direction of the arrow on the CT clamps. It must point towards the load for correct consumption readings. For solar generation, the arrow should point away from the load (towards the grid/inverter).
- Phase Correspondence: When using multiple CT clamps in a three-phase system, ensure that each clamp (L1, L2, L3) is correctly installed on its corresponding phase wire. Mismatched phases will lead to incorrect data.
- App Data Visualization: The Smart Life app provides bar graphs for kWh consumption per phase. While current measurements are available, trend lines for current might not be directly supported in the same graphical format as energy consumption.
- Alerts and Routines: The device can often be integrated with smart home platforms like Alexa for routines. Check the Smart Life app for options to set up alerts based on consumption or lack thereof, and to create routines with other smart devices.
- Síla signálu: For ZigBee versions, ensure the device is close enough to the ZigBee gateway for a stable connection. For WiFi, a strong 2.4GHz signal is crucial.
11. Záruka a podpora
For warranty information and technical support, please refer to the official product page or contact the seller directly. This manual provides general operational guidelines and does not cover specific warranty terms or advanced support procedures.
Uživatelská příručka ve formátu PDF je k dispozici ke stažení: Uživatelský manuál (PDF).





