2009

HM POWER (Guangdong) Co., Ltd. was founded.

2010

HM POWER atmospheric sealed air insulated ring main unit passed all the tests at Warsaw high-voltage test station and was allowed to be applied in Europe.

The first Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear was supplied in Europe.

2011

The RMU passed the type tests at Xi’an high-voltage apparatus research institute of China, got a national standard number of XGN99 and went into the stage of mass production.

The RMU passed the new product and new technology authentication organized by Guangdong Provincial Machinery Industry Association and Guangdong Power Grid.

2014

The Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear’s technological solutions were listed in a national building standard design portfolio, Electrical Design and Installation of Super High-rise Buildings.

2016

The RMU was listed in New Technology Catalogue of Electric Power (Power Grid) compiled by China Society for Electrical Engineering, State Grid and China Southern Power Grid.

2018

The Atmospheric Pressure Sealed Nature-Air Insulated RMU/Switchgear and the low-current earth-fault detection device were selected into New Technology Application Guide of China Southern Grid Corporation (2018).

2019

The RMU was listed in the State Grid’s “Ring Main Unit (Cabinet) Standardized Customization Program”, Primary and Secondary Integrated and Complete Set of Ring Main Units and Standard Materials Catalog of Distribution Construction and Renovation (2019).

2020

The atmospheric pressure fully sealed air insulated switchgear was listed in Green Technology Promotion Catalog compiled by National Development and Reform Commission (NDRC).

2021

HM POWER was entitled National SRDI (Specialized, Refined, Differential, Innovative) Little Giant Enterprise of China.

2024

Global sales have exceeded 50000 units.