BigPatents India

The device and method protects 3 phase agriculture field water pump sets simultaneously from primary and secondary phase failures and no delivery water / dry run condition .Direct detectors are used to sense the three failure states. Instant functional test simulation switches and indicators are provided to the controller. The controller can be directly coupled to the motor starter and the starter solenoid is provided with a line voltage booster to avoid chattering under low line voltage operation. Delay restart, automatic operational Repetition, a selector for hold / continue repetition and bypasses for dry run and total control operations are provided on controller. The operations are processed through a digital program.