The L&T ER300P 10-40A 3 Phase LCD 4 Wire kWh Meter is a reliable and accurate way to measure your electricity usage. This meter is easy to install and use, and it provides clear and concise readings that will help you keep track of your electricity usage and costs. The L&T ER300P Protective Relay is designed for use with low current circuits. It has a current range of 10-40 amps and is compatible with LCD fuse types. This product is known for its long life and low price, making it a great value for your money.