Magnetic latching relays are driven by pulse signals and maintain a bistable contact state with a permanent magnet. Even after power is cut off following a switching action, the on/off state remains locked. Power consumption is only instantaneous during operation, resulting in extremely low static losses, making them a core component in metering equipment. In the metering circuit design of single-phase smart meters, the Manganin Shunt with 100A For Single Phase Meter collects the load current, while the magnetic latching relay manages the circuit's on/off state. Together, they form a complete remote cost-control metering unit, significantly reducing the meter's power consumption during long-term standby.
Ordinary electromagnetic relays require continuous energization to maintain engagement, resulting in heat generation and high energy consumption over long-term operation, making them unsuitable for the low-power design standards of meters. Magnetic latching relays perfectly solve this problem. Single-phase electricity meters equipped with the EBW Manganese Copper Shunt for Relay operate continuously year-round. The magnetic latching relay has no static current and does not shunt the current acquisition circuit, ensuring current sampling accuracy while avoiding coil heating that could interfere with sampling stability. This makes it the preferred switching device for civilian metering equipment.
Remote prepayment control is a core function of single-phase smart meters. The power system can send pulse commands via carrier waves or remote messages to drive the magnetic latching relay to complete closing and opening operations, enabling power cut-off for overdue payments and power restoration upon recharge. The metering circuit equipped with the Manganin Shunt Resistor for Electrical Meter can accurately acquire a 100A range load current. The magnetic latching relay independently manages the main power supply circuit; its functions do not interfere with each other. After a power outage, the sampling reference and relay on/off state are simultaneously retained, eliminating the need for recalibrating metering parameters upon power restoration.
Besides electricity metering scenarios, magnetic latching relays are also widely applicable to smart homes, industrial automation, and vehicle power supplies, but the matching requirements for sampling and switching devices vary significantly across different scenarios. Smart home switches only require small current switching and do not need high-precision sampling components. However, metering scenarios require high-precision sampling devices. The Electron Beam Welding Manganin Shunt is specifically developed for high-current sampling in single-phase meters and has the highest compatibility with the low-interference characteristics of magnetic latching relays, effectively avoiding disturbances to the current sampling value caused by switching pulses.
Compared to conventional electromagnetic relays, magnetic latching relays have comprehensive advantages in power consumption, heat generation, anti-interference, and shock resistance. However, their drive logic has special requirements; they cannot be directly connected to a constant DC power supply and require a bidirectional pulse drive from an H-bridge circuit. In the design of a meter motherboard integrating the Electron Beam Welding Shunt Resistor, engineers need to add a separate contact status detection circuit. Through optocoupler feedback of the relay's on/off signal, the main control chip combines the current data collected by the sampling device to simultaneously complete metering and loop status monitoring.
Industrial automation, communication base stations, and new energy vehicle battery management systems also use magnetic latching relays, but these scenarios do not require high-precision current sampling and therefore do not require corresponding sampling devices. Single-phase electricity meters are precision metering devices, and the accuracy of current sampling directly determines the accuracy of billing. The Manganese Copper Resistance Shunt can stably collect single-phase load current from 0 to 100A. Combined with the zero static power consumption advantage of the magnetic latching relay, it not only meets the metering accuracy standards of the power industry but also extends the overall lifespan of the meter and reduces energy consumption during equipment maintenance.
Magnetic latching relays, with their core advantages of state memory and low loss, firmly occupy the market for single-phase smart meters. In the design of complete meter solutions, the coordinated design of switching devices and sampling elements is particularly crucial. The Manganin Shunt with 100A for Single Phase Meter, as a standard sampling accessory for single-phase 100A range meters, combined with the magnetic latching relay, addresses three core requirements: remotely controllable on/off switching, high-precision current acquisition, and long-term low-power operation. It is a standardized supporting solution for civilian electricity metering equipment and is widely used in single-phase smart prepaid meters in urban and rural residential areas.
Commercially available sampling devices vary widely in accuracy, temperature drift, and current resistance, easily leading to excessive metering errors. Our self-developed and mass-produced Maganin Shunt for Electronics Meter is made from high-purity manganese copper substrate, offering excellent temperature drift control. It is matched with a magnetic latching relay, ensuring interference-free operation. All specifications comply with power grid metering and testing standards, making it suitable for mass assembly of various single-phase prepaid meters. Customers with needs for complete meter assembly, sample testing, or bulk purchasing can contact us at any time for consultation and to place sample orders.
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