Products

Dongfa Intelligent manufactures the 40.5kV Solid-Insulated Vacuum Circuit Breaker for C-GIS and compact switchgear applications. The series covers 12kV, 24kV, and 40.5kV voltage classes, with rated current from 630A to 2500A and rated short-circuit breaking current from 20kA to 40kA. It uses a solid-insulated pole and vacuum interrupter, with a three-position mechanism integrating circuit breaking, isolation, and earthing functions. Selection should be based on system voltage, rated current, short-circuit breaking capacity, operating mechanism voltage, mounting dimensions, and interlocking requirements.

Dongfa Intelligent supplies the 40.5kV Wind and Solar Vacuum Circuit Breaker for wind power, solar power, and other new energy switching applications. The product uses a vacuum interrupter and offers rated current of 630–1250A, rated short-circuit breaking current of 20–31.5kA, and a circuit breaker interrupter mechanical life of 10,000 operations. It features an opening time of 20–50ms, closing time of 30–70ms, and a spring operating mechanism supporting AC/DC 220V and 110V. Configuration can be confirmed according to system voltage, current, short-circuit level, control voltage, and switchgear installation requirements.

Dongfa Intelligent is a 40.5kV Wind and Solar Vacuum Load Switch-Fuse Combination Unit manufacturer supplying medium-voltage switchgear for wind power, solar power, energy storage, and new energy step-up stations. The product combines a load break switch, fuse protection, and vacuum circuit breaker, supporting 630–1250A rated current, 31.5kA short-circuit breaking, and up to 80kA short-circuit making capacity for 40.5kV applications.

Dongfa Intelligent supplies the HD11FA series Anti-Misoperation Knife Switch for low-voltage power distribution and isolation applications. The series covers rated operating current configurations of 200A, 400A, 600/630A, 1000A and 1500/1600A. It has a rated insulation voltage of 660V, rated working voltage of AC380V/DC220V, rated frequency of 50Hz and utilization category AC-20. The series is available in HD11FA/38 front-board and HD11FA/39 back-board mounting types.

The HR17B Series Fuse Switch Disconnector from Dongfa Intelligent is designed for manual isolation, normal-current switching, and fuse-based short-circuit protection in low-voltage AC distribution systems. The series covers rated operating currents from 40A to 630A, supports 2P and 3P configurations, and is compatible with RT14 and NT fuse links. With a rated operating voltage of 400V, rated insulation voltage of 690V, and a rated limited short-circuit current of up to 50kA when coordinated with the specified fuse link, it is suitable for distribution cabinets, motor circuits, and industrial control applications.

Dongfa Intelligent, a low voltage switchgear manufacturer, supplies the Protected Open-Type Knife Switch HD11F/HS11F Series for manual isolation and power transfer in low voltage distribution cabinets, industrial control cabinets, and PV combiner boxes. The open-type structure provides exposed contacts and a clearly visible break after opening. The series covers 100A, 200A, 400A, 600A, and 1000A ratings, with 2P, 3P, and 4P configurations, rated-current making and breaking at AC380V and DC220V, and defined short-time withstand and dynamic stability current levels.