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why CT output is always raetd 5.regardsof primery curre.
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Answer Posted / ashish gupta
It consider to be standard. But if we see the ratio error and phase angle error formula we observe that turns ratio ns comes out to be in denominator.So higher the turns ratio lower is the error. So higher turns ratio is obtained when secondry current is 1 amp
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I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?
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