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Question:# The calculation of the use of electricity in the construction elevator

A lift motor is 7.5 KW, and the frequency converter sends current 4.2 A, which has A heating resistance in the converter, and how the charge is calculated when the lift is full. Or consider the power of the converter and the power of the thermal resistance.

Use electricity in the field (1) lifting equipment class: tower crane 2, construction elevator 3; According to the table, K = 0.3 cos phi = 0.7 tg phi = 1.02 JC = 40% (temporary load) Pe = 2 times 63 + 3 times 11 = 159 (kW) And then power: PS = 2 times Pe = 2 times 159 = 201 (kW) Pjs1 = K * PS = 0.3 * 201 = 60.3 (kW) Qjs1 = tg phi by Pjs1 = 1.02 times 60.3 = 61.5 (kVA)

Jul 21, 2017

The full load is 7.5 KW. The output current is 4.2 A, is the converter 7.5 KW?

Jul 21, 2017

Try using the security software. There is a cracked version

Jul 21, 2017

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