Phase reversal protector Three Phase Voltage Monitoring Relay 2 CO , 6A

Phase reversal protector Three Phase Voltage Monitoring Relay 2 CO , 6A

If two of the lines supplying power to a three-phase motor are reversed, it will cause the motor to reverse the direction of rotation. This can be a serious problem with some types of equipment. Unintended reversal of direction can cause gear teeth to shear, chains to break, and the impeller of submersible pumps to unscrew off the end of the motor shaft. It can't only cause dam age to equipment but also injury to operators or personnel in the vicinity of the machine.Phase failure occurs when power is lost to one of the lines supplying power to a three-phase motor. The motor will continue to operate but will draw an excessive amount of current. In this condition, the overload relay should cause the motor starter to disconnect the motor from the power line if the overload heaters have been sized correctly. Single phasing will cause the two phases that remain energized in a three-phase motor to increase current by an average of 173%.

♦ Features

-- Compact modular size

-- Three-phase monitoring of phase reversal, phase failure

-- Powered by the measuring circuit

-- 2 C/O contacts

-- 2 LEDs for status indication

-- Phase reversal

-- Phase failure

• Pumps • Fans

• Blowers • Motors

• Compressors

• CE • CCC

♦ Technical data