Introduction: In today’s rapidly changing climate, every country faces the challenge of producing electricity from renewable energy sources (RE). As a result, power distribution networks (medium voltage, 12/24 or 22/33 kV) must adapt to these shifts. Voltage band violations disrupt the stability of low-voltage electricity (380/400 V), posing a significant issue that utilities and consumers must address.

On-Load Tap Changers (OLTC-DT):

Purpose: OLTC-DT serves as a viable solution to tackle the aforementioned challenges. These devices are installed in distribution transformers (DTs) and automatically adjust voltage levels within the low-voltage range.
Functionality: During on-load operation, OLTC-DT ensures continuous electricity supply by maintaining the specified voltage levels.
Case Study: C.P.N. Transformer Co., Ltd. (Thailand):

Company Profile: C.P.N. Transformer Co., Ltd. is a leading manufacturer of high-quality distribution transformers in Thailand.
Equipment Procurement: The company recently acquired the ECOTAP® VPD® III100D-36-09090 On-Load Tap Changer from Maschinenfabrik Reinhausen GmbH (MR), Germany.
Specifications:
Capacity: 2500 kV (2.5 MVA)
Regulating Range: +4% to -5% in 1.25% steps
Application: Installed at the P.S.C. Starsh Prods Co., Ltd. factory
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