3 Phase Fused Disconnect Switch
Key attributes
| Brand | Switchgear parts |
| Model NO. | 3 Phase Fused Disconnect Switch |
| Rated normal current | 630A |
| Rated frequency | 50/60Hz |
| number of poles | 3P |
| Series | DNH1 |
Product descriptions from the supplier
This type of fused electrical switch is a 3 phase fused disconnect switch, model DNH1G. It is used together with NH series fuses, so it is commonly called nh fuse switch disconnector, and it can also be called blade fuse switch with an isolation knife.
This fuse switch produced by has a unique appearance, different current specifications, and different materials. The main material of the shell is PA66 resistance V0, PC, DMC, composition. The copper parts are made of red copper.
Structure Characteritic:
The switch is composed of base、cover and arc chute, all these parts are made of arc-resisting plastics, it is whole plastic structure.The static contact is directly installed on thebase, the arc chute is rasily mounted and dismounted, each arc chute has two parts: inner room and outer room, it adopts multi-pieces of metal arc-blowout grid which increase the arc-blowout capacity and prolong the service life of the contact. NT type fusing unit is fixed inside the cover, the cover can be rotated along the supporting unit in fan shape, it has a relative big electric isolation distance which can meet the demands of the isolating seitch; The cover can be dismounted from the base easily
chich make the installation and replacement of the fusing unit easy There are three group of installation hote on the base, which and meet the installation requirements of various switchgear cubicle and panel. Auxiliary contact can be mounted at the two side of the switch on demands, it can give out the signal of opening and closing the switch.
Low voltage cabinets suitable for multiple scenarios such as industrial power distribution, new energy, and special operations, with a wide range of compatible currents and multiple installation and operation methods. The specific types of cabinets suitable are as follows: GGD cabinet, XL-21 power cabinet, new energy supporting distribution cabinet, industrial equipment dedicated control cabinet, outdoor comprehensive distribution box (JP cabinet)
Product parameters:DNH1-160/30G
| Structure description | Match fuse size | Mounting method | Product model | Item No. |
| Normal type | 00 | Fixed type | DNH1-160/30G | DN31001 |
| With 1NO+ 1NC auxiliary contactor | 00 | Fixed type | DNH1-160/30G | DN31011 |
Parameter Description
| With fuse | Rated voltage | Ue | V | AC380 | AC660 |
| Rated current | Ie | A | 160 | 100 | |
| Conventional thermal current | Ith | A | 160 | 100 | |
| Rated short-time withstand current | kA | 100 | 50 | ||
| Rated insulation voltage | Ui | V | 800 | ||
| Rated impulse withstand voltage | Uimp | kV | 8 | ||
| Utilization category | AC-23B | ||||
| AC-22B | |||||
| AC-21B | |||||
| AC-20B | |||||
| Electric endurance times | Times | 200 | |||
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
