The smart power meter can be used to display your real-time power consumption, help with load management and transformer monitoring, and power monitoring.

The smart power meter can be used to display your real-time power consumption, help with load management and transformer monitoring, and power monitoring.

Smart power meters can save you time and money, because changes can be made to automatically reduce energy consumption when not needed. Touch screen PLCs, data recorders, programmable automation controllers and SCADA software running on PCs can be used to control, monitor and display data in a way that is easy to understand and analyze.

So, what is the most important thing to consider when choosing an electricity meter?

Single-phase or three-phase
When choosing an electricity meter, the first thing to consider is how many phases the system needs. Today, most suppliers provide single-phase power meters and three-phase power meters. If the current system from which data is to be recorded is single-phase, a single-phase power meter is required. If it is a three-phase electrical system, it can only work with a three-phase power meter. Single-phase power meters such as PM-3112 and PM-3114 are compact, can be mounted on DIN rails, and are flexibly suitable for various energy monitoring applications. They are divided into 2 loops and 4 loops and support various input types such as Vrms, Irms, kW, kWh, kVA, kVAh, kVAR, kVARh and PF. They can be used on the low-voltage primary side and medium/high-voltage secondary side, enabling users to obtain reliable and accurate real-time energy consumption readings from the device.

After determining the phase of the power meter, another thing you need to consider is how many amps the system needs. Generally, the most common amp options for smart power meters are 60 amps, 100 amps and 200 amps. The supported amperage may vary with the power system. If you choose a 60A power meter for a power measurement system that actually requires 100A, it cannot be used. For example, the PM-3133 series three-phase smart power meter is equipped with three different types of amplifiers: PM-3133-100 supports 60A; PM-3133-160 supports 100A, and PM-3133-240 supports 200A. With their high accuracy (1%, PF = 1), they can generate very reliable data based on the actual power you consume. These compact size and cost-effective power meters are equipped with revolutionary wired clamp CTs that are easy to install. It can work in a wide input voltage range of 10~300 VAC, which is compatible worldwide.

Smart power meters communicate through different media and protocols, so it is also important to determine which communication protocol the power meter needs to use. Modbus is one of the most common protocols in industrial applications. Modbus was developed by MODICON in 1979 and has now become a standard for connecting industrial equipment, a publicly released and easy-to-use protocol. Smart power meters that support Modbus protocol are easier to integrate with your current Modbus system. For example, PM-3112 supports Modbus RTU, while PM-3112-MTCP communicates via Modbus TCP. In addition to Modbus, other communication protocols can also be used for power monitoring applications. The CAN bus or controller area network is a protocol that allows devices to be connected to applications without a host PC. Today, the CAN bus has been used for data communication in the automotive, bicycle, industrial and entertainment industries. Smart power meters such as PM-3133-240-CAN are designed to support the CAN bus and can be seamlessly integrated with existing CAN bus systems. The other protocol is CANopen, which is a communication protocol used in automated embedded systems. Power meters that support CANopen include single-phase smart power meters such as PM-3114-160-CPS and three-phase power meters such as PM-3133-100-CPS. In summary, choosing a smart meter with the correct communication protocol is very important for the system to function properly.

What else?
Now that we have considered phase, amperage and communication protocols, what else is needed for a successful energy monitoring system? The biggest advantage of the smart meter is that it can be connected with SCADA and HMI software and automate the entire system. Using SCADA software, it can display the status of the device, send email or SMS alerts, log data, implement controls and generate reports. Touch screen controllers such as TPD-433 can also be used in home automation projects, where you can view real-time power consumption data and control electronic devices on the touch panel.


Zhejiang Tepsung Electric Meter Co., Ltd . is a manufacturer and supplier of  single phase energy meter ,    3 phase electricity meter    ,   kilo watt-hour meter and  din rail meter  . We have established a mature and professional team in the design, production and sales of electric meters. Welcome to buy: