ENERGY ENGINEERING CO., LTD. Address: 142, Ward 15, Q10, Tp.HCM Tel: 08-2220 5846 Fax: 08-22205847 HO CHI MINH CITY. HCM, 27 October 2015Number: ... ... ../2015/CV-EN DISPATCH V/v Motor 315kW 2 p B3 at factory Nutifood-Binh Duong Dear Tan mechanical refrigeration co., Ltd Long First Energy Engineering Co., Ltd. Thank You company has confidence to use our products in the past.On October 17, 2015 You Tan Long mechanical refrigeration Ltd. announce Motor 315kW 2 p H201002 series B3 EFC Enertech, running about, stop check motorised insulation resistance is low (about 400Ohm).Receiving information on new Dragon Company 18/10/2015 KTNL Company sent a technician to down House Nutifood-Pacific test.Initial inspection:-Total time Motor has run 11 h, use Danfoss inverters.The actual measurement of the parameters of the motor:-Run the retry motor 30 p, 43% load, the inverter does not report an error, measured correlation line 20A/297V. Check the power on electrical grounding and wire detection phase wire connected, unplug the cord from the motor on the inverter off and run, measure the pressure wire grounding and wiring-phase: 231V; the phase wire and the shell 283V.-Coil: Ru = Rv = Rv = 6mOhm-Insulation resistance: Ru = 1, 84GOhm, Rv = 1, 71GOhm = 2, 54GOhm, Rw; Ru-v = 6, 91GOhm, Rv-w = 7, 69GOhm, Ru-w = 7, 44GOhm.-Insulation resistance when fighting the power cord to the motor: Ru = 450MOhm, Rv = 372MOhm, Rw = 433MOhm.Insulation parameters when removing the power cord the measurement to ensure normal motor.Conclusion:-With the power on, motor operates normally.-The Tan Company reported low insulation resistance before it is due to measurement do not remove the power cord.RecommendedCheck the power source to the inverter and the installation, to avoid a gas line.We wish to continue to receive cooperation from your company.
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