3UA types electronic overload relay/overcurrent ac relay and electric relay are popular in the Dubai,Iran, India, Syrian,

Our 3UA series of electronic overload relay can be used in the circuit of 50HZ or 60HZ,rated insulation voltage 660V,rated current 0.1--125A for protecting the phase break when the electric motor is overload or phase breaking.It can be assembles with corresponding AC contactors to form starter.

3UA types electronic overload relay/overcurrent ac relay and electric relay  also has different mechanism and temperature compensation. THE MAGNETIC RELAY CONFORMS TO IEC60947-4-1 and IEC60497-5-1,GB14048.4 and GB14048.5.

The electronic overload relay is composed of three parts of sampling system,judment and management system,performing and output system,which samples through current transformaer to transfor three phase sampling current into DC voltage with corresponding setting current. Signal carries out logical calculus process by CMOS chip and judge overload,loss of phase and unbalance,meanwhile send execution command to the execution mechanism that sends signal for protection.

The Characteristics as following:

1,Three phase,passive,low energy loss;

2,Permanent magnetism trippingg mechanism

3,Protection again overload,loss of phase,three phase unbalance

It is the most advanced thermal relay in the twenty century in the world.

More information,please don't hesitate contact us.