Measurements on 10 HP AC 3 phase Electric Motor
Measurements on 10 HP AC 3 phase Electric Motor
(OP)
I made measurements on a 10 hp AC Motor 3 phase 220 volts. The motor can be connected either 220 v or 400 v. This motor is 220 v. I used Amprobe DMII PRO. I connected current probes to the load on the following sequence: Black, Red, Blue. Then I connected voltage probe to the load on the following sequence: Black, Yellow, Blue Here are the results I obtained first time:
242 V phase to Phase Voltage
10 Amps
2.08 kW
2.31 kVA
1.18 kVAR
PF = 0.9
Then I switched between the two voltage probes (Yellow, Blue) so the sequence becomes Black, yellow, Blue and the current probes sequence was the same. Here are the results I got:
242 V phase to Phase Voltage
10 Amps
4.04 kW
5.01 kVA
2.86 kVAR
PF = 0.83
Question 1: Are these readings reasonable?
Question 2: Which one is correct?
Thanks
242 V phase to Phase Voltage
10 Amps
2.08 kW
2.31 kVA
1.18 kVAR
PF = 0.9
Then I switched between the two voltage probes (Yellow, Blue) so the sequence becomes Black, yellow, Blue and the current probes sequence was the same. Here are the results I got:
242 V phase to Phase Voltage
10 Amps
4.04 kW
5.01 kVA
2.86 kVAR
PF = 0.83
Question 1: Are these readings reasonable?
Question 2: Which one is correct?
Thanks





RE: Measurements on 10 HP AC 3 phase Electric Motor
A1. No. A2. RTFM on the tester cover-to-cover. Figure out proper testing on a 1ø 2W load until you get that down. Then carefully advance to 3ø 3W measurements.
RE: Measurements on 10 HP AC 3 phase Electric Motor
1. Both readings are somewhat inaccurate.
2. 242 V phase to Phase Voltage
10 Amps
4.04 kW
5.01 kVA
2.86 kVAR
PF = 0.83
appear to be more consistent/correct.