Self-locking and interlocking are achieved by auxiliary contacts of relays. First of all, you need to understand what is called self-locking and what is called interlocking. Self-locking is to short off the button switch of the contactor coil loop with your own contacts, and make the coil loop open continuously after the button switch is released, which is self-locking.

3 groups of 120A contact switching capability Contact on-off detection auxiliary switch can be provided Coil control single and double coil optional

Please apply a suitable voltage to the coil according to the coil polarity specified in the manual, otherwise the operating voltage of the relay will increase or even not operate; it needs to be changed When driving the polarity, please use the "-R" type relay.

Latching refers to "self-locking", which means that after the relay is energized, its state is automatically locked and the circuit is kept connected. Even if the control current is disconnected at this time, its state will not be changed. That is to say, when the power is energized and absorbed, the control current is disconnected, and it remains on until the unlock button is pressed.

Magnetic latching relay is a new type of relay developed in recent years, and it is also an automatic switch. Like other electromagnetic relays, it automatically switches on and off the circuit.

In summary, Oswell’s market position as a global provider of metering parts is a multi-faceted advantage. It is built on a unique combination of deep, integrated component expertise and advanced manufacturing, strategically aligned with the powerful trends shaping the energy and technology sectors. Ultimately, Oswell succeeds by being more than a catalog supplier; it is a vertically-integrated, technically-engaged partner that delivers the precision, reliability, and innovation its global customers need to build the foundational devices for a smarter and more electrified world.

Oswell's approach to building lasting global partnerships rests on a powerful triad: uncompromising quality delivering reliable performance, flexible customization addressing specific needs, and forward-looking innovation driving mutual growth. By consistently exceeding expectations across these dimensions while maintaining transparent, collaborative relationships, Oswell transforms client engagements into strategic alliances built on trust, shared success, and a common vision for the future of electrical technology.

Latching relays are not merely components but enablers of efficiency, accuracy, and reliability in energy metering. Their bistable operation ensures minimal power consumption, their inherent memory function guarantees accurate tariff application, and their robust design delivers long-term safety and cost savings. The integration of high-performance latching relays from specialized manufacturers like Oswell​ is, therefore, a critical design choice for developing next-generation metering devices that meet the evolving demands of modern energy management systems.

Magnetic latching relays offer compelling advantages for electric energy meters, including minimal power consumption, high reliability, and long operational life. Their unique characteristics make them indispensable components in modern smart metering systems. Oswell's continuous innovation in design and manufacturing ensures that their magnetic latching relays meet the evolving demands of the energy industry, providing utilities with robust, efficient solutions for advanced energy management and grid optimization.

Latching relays have revolutionized energy meter design by combining zero-power holding capability with robust switching performance. Their ability to enhance meter lifespan through reduced power consumption and mechanical durability makes them essential components in modern metering infrastructure. As smart grids evolve toward greater efficiency and functionality, latching relays will continue to play a pivotal role in enabling advanced features while maintaining the reliability expected from critical grid components.