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Recent Projects - Low Voltage [LV] Test Transformers with Motorized Tap Changers Pass the Test for Commercial HVAC Manufacturer

Two OLSUN LV Test Transformers were shipped to a major manufacturer of commercial HVAC equipment. Each of these transformers has five secondary voltages which are connected to a five-position motorized tap changer. The transformers provide the power to test the company’s completed HVAC equipment right on the factory floor at any of the different voltage levels with a push of a button. The type of “custom” cabling of the coils to the tap changer and to the circuit breaker proves once again “We Can Do That” and is a shining example of our ability to engineer-to-order and the quality standard upheld at Olsun. That quality was obviously recognized by the customer who rewarded Olsun with this repeat business—after purchasing two similar test transformers several years ago.


  • Power: 870/975 kVA (Quantity 1); 650 kVA (Quantity: 1)
  • K Factor: 1
  • Primary Volt: 480D
  • Secondary Volt: 575Y/480Y/380Y/220Y/208Y
  • Copper Wound, VPI Coils
  • NEMA 1 Floor Mount Substation Enclosure
  • Cold Rolled Steel with ANSI 61 Gray Powder Coat Finish
  • Primary connected to 1400 Amp, 3 Phase Circuit Breaker
  • Secondary connected to 2000 Amp, 5 Position Motorized Tap Changer

lv testing transformer commercial hvac manufacturer

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