HS11FD series Knife Disconnect Switch Error proof type with grounding function – isolator
Key attributes
| Brand | Switchgear parts |
| Model NO. | HS11FD series Knife Disconnect Switch Error proof type with grounding function – isolator |
| Rated voltage | AC 400V |
| Rated normal current | 400A |
| Series | HS11FD |
Product descriptions from the supplier
HS11FD series switch was originally a knife type change-over switch, and then it was redesigned and improved into an error proof isolator with grounding function (hereinafter referred to as the switch), which added a mechanical locking mechanism, opening and closing signal output, grounding function and live indication function.
It effectively solved the technical problems of low-voltage switch grounding difficulty, hidden danger of closing with ground wire, and prone to safety accidents.
It has simple structure and convenient grounding, It can prevent the occurrence of switching on accident with ground wire and the occurrence of loaded broach switch accident.
The design state of this switch is divided into power on state and grounding state. This switch meets the requirements of standard GB14048.3-2008.
Suitable for multiple general and specialized low-voltage distribution cabinets, including GGD type low-voltage distribution cabinet, PGL type low-voltage distribution panel, XM (XL) series power distribution box, photovoltaic grid connected low-voltage cabinet (non-standard customization), etc
Knife Disconnect Switch Main technical parameters
| Agreed heating current (A) | 200 |
400 | 600 |
| Rated insulation voltage (V) | 1000 |
1000 | 1000 |
| Rated working voltage (V) | 400 |
400 | 400 |
| Mechanical life (Times) | 1600 |
1000 | 1000 |
| Rated short-time withstand current (kA) | 10 |
20 | 25 |
| Operating force (N) | ≤300 |
≤400 | ≤400 |
Ordering instructions
Due to the addition of live indication function to this series of switches, there are phase sequence requirements for power supply in the internal circuit.
Please indicate that the zero line (N pole) is on the left or right side when ordering, and also indicate the current level, wiring mode and quantity.
Please consult our technical department for special orders. For example: HS11FD-200/481 N pole is on the right side of 10 sets.
Related Products
-
160-250A DNH40 Series Disconnector Switch
-
315-400A DNH40 Series Disconnector Switch
-
3200-4000A DNH40 series isolator switches
-
2000-2500A DNH40 Series Disconnector Switch
-
630-800A DNH40 Series Disconnector Switch
-
HH15 series Disconnector fuse group and disconnector
-
Disconnector Fuse Group HGLR Series, Fuse Switch Disconnector
Related Knowledges
-
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026 -
What’s the Difference Between Rectifier Transformers and Power Transformers?What is a Rectifier Transformer?"Power conversion" is a general term encompassing rectification, inversion, and frequency conversion, with rectification being the most widely used among them. Rectifier equipment converts input AC power into DC output through rectification and filtering. A rectifier transformer serves as the power supply transformer for such rectifier equipment. In industrial applications, most DC power supplies are obtained by combining a rectifier transformer with rectifier equ01/29/2026
