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This ZWC de-energized tap-changer is suitable for oil-immersed power transformers and special transformers, such as furnace or rectifier transformer with a rated frequency of 50 or 60 Hz, a maximum equipment voltage of 145kV and maximum rated current of 1000A. Tap changing takes place when the transformer is de-energized, so as to change the transformer ratio and stabilize the output voltage.ZWC tap-changerDrive mechanismZWC is of a split structure and consists of two parts: the body and the drive mechanism. The transformer manufacturer is responsible for connecting these two. It is of linear type and equipped with two insulating support plates as a frame. It is used in power transformers and large-scale distribution transformers. It is installed in the space between the windings and the t...
Release time: 2020 - 04 - 21
Recently, Huaming launched its on-tank reactive vacuum OLTC HWDK. It's a 3-phase on-load tap-changer, composed of one diverter switch and one tap selector, designed for large-current on-load voltage regulation in utilities and industries. The current path during the switching sequence is shown in red.Note: VS: Vacuum interrupter; P1, P4: Tap selector contact; P2, P3: Main contactThe technical data is as belowTypeHWDKMax. rated through-current Ium (A)15002000Rated frequency (Hz)50       60Max. rated voltage tap-to-tap (V)2000Max. rated voltage per step (V)1000Rated step capacity (kVA)30004000Standard operating positions (with change-over selector)3333Regulating winding section9(8 effective)Short-circuit current tes...
Release time: 2020 - 04 - 21
The 110kV substation of a China Unicom cloud data center was recently put into use. As a good partner of on-load voltage regulating power transformer, Huaming’s CZ tap-changer is doing its best to ensure stable performance. CZ dry type vacuum OLTC is made of 3 single-phase tap-changers and is controlled by one motor drive unit. Its max. rated current for one phase is 500A and max. work positions 17 (linear). CZ has pretty good operation records. For example, during 2014 FIFA World Cup at Brazil’s Itaipava Arena Fonte Nova, CZ did an excellent job, guaranteeing reliable power supply. For this China Unicom project, Huaming’s star product 110kV CZ dry type vacuum tap-changer, together with SHM-D smart digital motor drive unit, will for sure contribute to the cloud center’s operation...
Release time: 2020 - 04 - 02
Huaming’s new SDZV vacuum tap-changer was launched to the market, an optimized product based on SHZV, with a better performance in distinguishing arcing and a higher max. rated current of 3000A.* Adopting the same structure of traditional SHZV tap-changer, SDZV inherits SHZV’s advantages, including inputting force from the head, arranging cables outside the oil compartment and transmitting force in the middle.* SDZV vacuum tap-changer is equipped with vacuum interrupters with two sets of contacts arranged in series. Two sets work simultaneously, but the arc-distinguishing compartments are relatively independent, both capable of making and breaking.                * The recovery voltage after vacuum interrupters break the current is reduced to pr...
Release time: 2020 - 04 - 01
From Oct. 22-26, 2018, Huaming welcomed a group of 12 technicians from Russian transformer manufacturers and transformer maintenance companies, including SVEL Power Transformers, TOGLIATTI TRANSFORMATOR, BirZST, TRANSFORMER LLC, REMENERGO–SARATOV LLC, MIGENERGOREMONT and VECTOR A LLC. Based on their technical background and actual needs, Huaming prepared a series of hands-on training to help them get familiar with Huaming tap-changers and motor drive units, identify problems and do trouble-shooting. After the training test, they were all awarded with Huaming Traning & Maintenance Certificates. Together with them were our Huaming Russia colleagues. Huaming Russia was established in 2016 with an aim to develop the Russian market. There is warehouse located in Yekaterinburg with spar...
Release time: 2018 - 11 - 12
Desert Sunlight Solar Farm is a 550MW photovoltaic (PV) solar power project built across 3,600 acres land in the Chuckwalla Valley. It was developed by NextEra Energy Resources and GE Financial Services. It is located in the east of Riverside county of California over land managed by the US Bureau of land Management (BLM).The project witnessed the start of construction in September 2011 and was commissioned in February 2015.It is capable of generating enough clean energy to serve around 160,000 California homes and displaces 300,000mt of carbon dioxide emissions annually. It is expected to support the state in achieving 33% of power from renewable resources by 2020. Huaming is proud to be the provider of the tap changer supplier for this prominent project.  Its state-of-art produ...
Release time: 2017 - 09 - 27
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