Dongfa Intelligent is a China manufacturer supplying the Anti-Misoperation Knife Switch HD11FA series for low-voltage power distribution and isolation applications. The series is available in rated operating currents of 200A, 400A, 600/630A, 1000A and 1500/1600A, with a rated insulation voltage of 660V, rated working voltage of AC380V/DC220V, and rated frequency of 50Hz. Front-board and back-board mounting types are available for different cabinet installation arrangements.
The Anti-Misoperation Knife Switch uses a physical separation structure between the operating position and live contact area. This design helps keep the operator away from energized components during manual switching and isolation operations.
The structure is intended for low-voltage distribution cabinets and other installations where manual isolation is required. Installation and operation should follow the applicable electrical safety procedures and the requirements of the equipment and cabinet system.
The HD11FA series has a rated insulation voltage of 660V and a rated working voltage of AC380V/DC220V. The rated frequency is 50Hz, and the utilization category is AC-20. The 1s short-time withstand current varies with the rated operating current. The 200A configuration is rated at 10kA, the 400A and 600/630A configurations are rated at 20kA, the 1000A configuration is rated at 25kA, and the 1500/1600A configuration is rated at 32kA.
The operating force and mechanical life are specified according to the rated operating current. This provides different mechanical characteristics across the HD11FA series for different current configurations.
The operating force is ≤250N for 200A, ≤300N for 400A, ≤350N for 600/630A, ≤400N for 1000A and ≤450N for 1500/1600A. The corresponding mechanical life is 10000 operating cycles for 200A and 400A, 5000 cycles for 600/630A and 1000A, and 3000 cycles for 1500/1600A.
HD11FA/38 is the front-board mounting type. It is designed for cabinet layouts using front-board installation. The overall dimensions, mounting dimensions and terminal dimensions should be checked against the selected model before installation.
HD11FA/39 is the back-board mounting type. Dimensions marked with an asterisk in the dimensional data apply to this configuration. Cabinet space, mounting holes and terminal connection requirements should be confirmed before installation.
The following data are based on the standard HD11FA series specifications. Dimensions marked with * apply to the HD11FA/39 back-board type.
| Model | A | B/B* | C | D | E* | a | b | φc |
| HD11FA-200/3 | 190 | 205/205 | 15 | 270 | 32 | 70 | 140 | |
| HD11FA-400/3 | 220 | 265/265 | 16 | 380 | 43 | 80 | 190 | |
| HD11FA-600/3 | 270 | 325/270 | 16 | 8100 | 55 | 100 | 140 | |
| HD11FA-1000/3 | 325 | 382/322 | 19 | 2120 | 70 | 120 | 140 | |
| HD11FA-1500/3 | 360 | 410/330 | 21 | 0130 | 85 | 130 | 140 |
Note: Dimensions marked with * apply to the HD11FA/39 back-board type. For the HD11FA/38 front-board type, B refers to the first value listed in the B/B dimension.
| Parameter | 200A | 400A | 600/630A | 1000A | 1500/1600A |
| Rated Operating Current Ie | 200A | 400A | 600/630A | 1000A | 1500/1600A |
| Rated Insulation Voltage Ui | 660V | 660V | 660V | 660V | 660V |
| Rated Working Voltage Ue | AC380V/DC220V | AC380V/DC220V | AC380V/DC220V | AC380V/DC220V | AC380V/DC220V |
| Rated Frequency | 50Hz | 50Hz | 50Hz | 50Hz | 50Hz |
| Utilization Category | AC-20 | AC-20 | AC-20 | AC-20 | AC-20 |
| 1s Short-Time Withstand Current (r.m.s.) | 10kA | 20kA | 20kA | 25kA | 32kA |
| Mechanical Life (Operating Cycles) | 10000 | 10000 | 5000 | 5000 | 3000 |
| Operating Force F | ≤250N | ≤300N | ≤350N | ≤400N | ≤450N |
Before ordering an Anti-Misoperation Knife Switch, confirm the required rated operating current, mounting type and installation dimensions. The applicable electrical and mechanical specifications should be checked against the selected current configuration.
For replacement of an existing knife switch, provide the original model, rated current, mounting type, installation dimensions and available drawings or photos. The existing cabinet space and connection arrangement should be checked against the applicable HD11FA configuration before replacement.
Dongfa Intelligent provides continuous after-sales support for high-voltage electrical products, including vacuum circuit breakers, vacuum load switches, disconnect switches, and electromagnetic coils. Our service covers installation, commissioning, technical consultation, troubleshooting, maintenance, and spare parts support.
We aim to provide timely technical support throughout product installation and operation, helping customers maintain the normal use of their electrical equipment and related components.
Dongfa Intelligent was founded in 2012 and specializes in high- and low-voltage electrical products. The company provides manufacturing and OEM/ODM services for electrical applications, with production and testing capabilities for its product range. ISO9001, ISO14001 and ISO45001 certifications are available.
A: The HD11FA series is an open-type knife switch designed for low-voltage power distribution and isolation applications. The appropriate configuration should be selected according to the required rated current and installation conditions.
A: HD11FA/38 is the front-board mounting type, while HD11FA/39 is the back-board mounting type. The applicable mounting dimensions should be checked according to the selected installation type.
A: The standard rated operating current configurations for the Anti-Misoperation Knife Switch are 200A, 400A, 600/630A, 1000A and 1500/1600A.
A: The 1s short-time withstand current is 10kA for 200A, 20kA for 400A and 600/630A, 25kA for 1000A, and 32kA for 1500/1600A configurations.
A: The rated insulation voltage is 660V, the rated working voltage is AC380V/DC220V, and the rated frequency is 50Hz. The utilization category is AC-20.
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