The electrical control system and core components developed and manufactured by DHHI such as JZCDW automatic detecting and positioning device, EM542-01 displacement transducer profibus conversion instrument, incremental rotary encoder, ultrasonic anemometer, encoder optical fiber conversion module, acceleration transducer, HRPM-903 multifunctional electric power instrumentation, yaw controller, reactive power compensation PU unit, super capacitor module, etc. are of superior quality and praised by the customers.

DHHI has strong technical background in independent development of electrical control system such as electrical control system for water treatment, state monitoring systems for various test benches, e.g. comprehensive test rig for electric transmission of wind turbine, test rig for gearbox, test rig for whole wind turbine, electric motor, etc., and the equipment is superior in quality.

The HV distribution switchgears developed and manufactured by DHHI include YN61-40.5 removable metal-armored AC switchgear, KYN28-12 removable indoor metal-armored switchgear, UniGear ZS1 and 10kV medium-voltage reactive power compensation device, with a capacity of producing 1000 sets of HV distribution switchgears annually.

The LV distribution switchgears developed and manufactured by DHHI include GBK LV switchgear, GGD fixed switchgear, MNS LV drawer-type switchgear, GCK LV drawer-type switchgear, Blokset LV switchgear, MNS2.0 LV switchgear, B-GLHR power box, XGM distribution box, TFC3000 intelligent dynamic reactive power compensation device, with a capacity of producing 5000 sets of LV distribution switchgears annually.

The box-type substations developed and manufactured by DHHI include YB series prefabricated box-type substation, ZBW series combined box-type substation, HYBM series railway box-type substation, with a capacity of producing 100 sets of box-type substations annually.