how can we select the rating of Load break switch that is connected to
the primary protection of 200 kva 11kv/415v distribution transformer??
step by step calculated answr pls...thnk.u
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Answer / guna
Depends up on the load current we have to select the LBS
instead of VCB or SF6 (LBS is less cost for the same rating
when compared to the above cb's)
P=1.732*V*I
I = P/1.732*V
I = 200KVA/1.732*11KV
I = 10.49 A
Is This Answer Correct ? | 3 Yes | 2 No |
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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