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Scope of application

HG2B series strip fuse type isolation switch is suitable for AC rated voltage 660V and below, AC 160A~630A, rated AC frequency 50Hz. With load operation, the first current transformer and bar switch integration, with the advantages of convenient adjustment of upper-lower inlet-outlet, three-phase separate breaking, three phase simultaneous breaking and others, widely used in complete sets of products and imported box substation.
In the distribution system of industrial enterprises, it is mainly used in distribution circuits and motor circuits with high short-circuit currents, which can be used to manually switch on and off the circuit infrequently and isolate the power supply, and can protect the AC circuit from short circuit. This switch is not suitable for starting and disconnecting a single motor switch.
Meet the standards: GB14048.3, IEC60947-3.

Model and meaning

Normal working conditions and installation conditions

1. The ambient air temperature is not higher than +40°C and not lower than -5°C.
2. The elevation of the installation site does not exceed 2000m.
3. Humidity: When the maximum temperature is +40°C, the relative humidity of the air does not exceed 50%, and higher relative humidity may be allowed at lower temperatures, for example, 90% at 20°C. Special measures should be taken for the occasional condensation caused by temperature changes.
4. The pollution level of the surrounding environment is 3.
5. The switch shall be installed in a place where there is no significant shaking, shock and vibration and there is no rain and snow. At the same time, there shall be no dangerous medium for explosion at the installation site, and there shall be no gas and dust in the medium that can corrode metal and destroy insulation.

Product Features

■ First integration of current transformer and fuse switch
■ With knife edge and arc extinguishing device, it is safe to operate
■ Isolated blade, NT/NH series and common semiconductor melt core (quick melt) can be added
■ Fuse monitor and signal switch can be added
■ Used as main switch, instantaneous breaking capacity up to 50-100kA
■ DNH5 strip fuse type isolation switch with unique process technology
■ The switch is beautiful in appearance, novel and concise, and conforms to the IEC60947-3.GB14048.3 standard.

Structure and characteristics

The switch consists of a base, a pedestal, a cover, a handle, a protective cover and others. The NT series fuse link is mounted on the cover and used as a movable contact blade; The handle rotates along the fulcrum of the base in fan-shaped, and the cover is broken and closed together with the fuse. There is a large space distance and clear breaking point to meet the requirements of the isolation switch. The pedestal and the base can be easily disassembled, so that the pedestal is installed on the bus bar safely and reliably. The base is equipped with an arc extinguishing grid to ensure the breaking capacity of the switch.

Main technical parameters

    HG2B-160/100 HG2B-250 HG2B-400 HG2B-630
Electrical parameters With fuse Rated operational voltage Ue V AC380V AC380V AC380V AC380V
Rated operational current   A 160 250 400 630
Conventional thermal current   A 160 250 400 630
Rated limited short-circuit current   KA 50 50 50 50
Rated insulation voltage   V 690 690 690 690
Rated impulse withstand voltage   KV 8 8 8 8
Use grade     AC-21B AC-21B AC-21B AC-21B
With isolation knife Rated operational voltage Ue V \ AC240V AC400V AC400V
Rated operational current Ie A \ 250 400 630
Conventional thermal current Ith A \ 250 400 630
Rated limited short-circuit current Icw KA \ 16 16 16
Rated insulation voltage Ui V \ 1000 1000 1000
Rated impulse withstand voltage Uimp KV \ 12 12 12
Use grade     \ AC-22B AC-22B AC-22B
Common parameters Rated frequency   HZ 50/60 50/60 50/60 50/60
Pole     3 3 3 3
Rated making capacity   A 10Ie
Rated breaking capacity   A 8Ie
Weight   kg 1.66 8.64 8.64 9.42
Fuse Size (RT16\NT\NH)
IEC60269-2, GB13539.2
    00 1 2 3
Operating current In A 160 250 400 630
Power Consumption P W 12 18 28 40
Mechanism Mechanical life   times 1400 1400 800 800
Busbar spacing   mm 100 185 185 185
Protection Front ON   IP20 IP20 IP20 IP20
OFF   IP30 IP30 IP30 IP30
Others Electronic fuse monitor (EFM)     Can be added Can be added Can be added Can be added
ON-OFF signal feedback (micro switch)     Can be added Can be added Can be added Can be added
Working conditions Temperature   -5~+55
Working mode     Continuous work
Operation     Handle
Installation Mode     Vertical
Altitude   m ≤2000
Pollution level     3
Overvoltage Grade    
The relationship between the switch and the fuse link
Conventional thermal current Ith Fuse link code Rated current of fuse link (A)
160A NT00 10, 16, 25, 32, 40, 50, 63, 80, 100, 125, 160
250A NT3 200, 250
400A NT3 315, 355, 400
630A NT3 425, 500, 630
Note: NT3-200, 250A fuse is non-standard, please contact our company to order or customize.

Outline and Installation Dimensions

Outline and Installation Dimensions of HG2B-160~630A

Model A B C D h a
HG2B-160 Three-phase 448 49 120 205 50 100
With copper 448 49 120 205 50 185
Single-phase 650 49 150 230 90 185
HG2B-250, 400, 630 Three-phase 764 98 195 457 105 185
Single-phase 764 98 195 300 105 185





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