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How much kW can a 3 * 30 (100a) three-phase meter withstand
The maximum rated current of the meter is 100A, so it can withstand a maximum of 60kW, 114A when the power factor is 0.8 and 91A when the power factor is 1
100A three-phase ammeter, load 150KW, how much transformer need to use?
When it comes to measurement, we have to follow the rules. The original meter is discarded, and a 5A three-phase four wire meter is used instead, and three 400A: 5A current transformers are used to form a regular measurement system
Known electric oven three-phase current, each phase is 36a, measured directly with an ammeter. Voltage 380V, what is the power?
According to the power equal to the voltage times the current (pure resistance circuit), since it is three-phase, then
P = 3 * I * V, then p = 3 * 36 * 380 = 41040 (W) is about 41kw
What's the current specification of watt hour meter: single phase: 2.5 (10) a, 5 (20) a, 5 (30) a, 10 (40) a, 10 (60) a, 15 (60) a, 20 (80) a
Current specification:
Single phase: 2.5 (10) a, 5 (20) a, 5 (30) a, 10 (40) a, 10 (60) a, 15 (60) a, 20 (80) a
Three phase: 3 × 1.5 (6) a, 3 (6) a, 5 (20) a, 10 (40) a, 15 (60) a, 20 (80) a, 30 (100) a
What do 2.5 and (10), 5 and (20) mean respectively?
The number in brackets represents the meaning: for example, 5 (20) a represents that the current allowed for long-term operation of the meter does not exceed 20a, rather than 20A in a short time. As for the meaning of 5, it does not represent rated current, but should be called reference current. It is a reference used for meter inspection and test, such as detecting light load, full load, starting current, etc, For example, if the current reaches 1% of 5A, it can be accurately measured. For example, if the current reaches 1% of 5A, it can reach the standard of accuracy. For example, it can test the measurement accuracy of the meter under the proportion of 1% 10%, 50% 70% 100% of 5A. As a reference, this parameter is meaningless for users
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