DNH9 Fuse Switch Disconnector
Key attributes
| Brand | Switchgear parts |
| Model NO. | DNH9 Fuse Switch Disconnector |
| Rated normal current | 250A |
| Rated frequency | 50/60Hz |
| Series | DNH9 |
Product descriptions from the supplier
Mainly used in distribution circuits and motor circuits with high short-circuit currents, as power switches, isolation switches, and application switches Emergency switch and used for AC circuit protection. Suitable for high short-circuit current scenarios, it can be used as a power switch, isolation switch, and emergency switch. It is also suitable for low-voltage cabinets in various scenarios such as industrial distribution and motor control. Specifically, it includes GGD low-voltage fixed distribution cabinet, GGJ low-voltage reactive power compensation cabinet, outdoor comprehensive distribution box (JP cabinet), emergency distribution cabinet, and small low-voltage cable branch box This switch is not suitable for directly opening and closing a single motor;Complies with national standard GB/T 14048.3 and international standard IEC/EN60947-3.
Working conditions
1.The ambient temperature range is -25 ℃~+55 ℃, and the average 24-hour value does not exceed+35 ℃. If the ambient temperature is lower than-25 ℃ or higher than+55 ℃, capacity reduction should be considered for use;
2. Altitude: The installation site has an altitude not exceeding 2000m;
3. When the maximum temperature is+40 ℃, the relative humidity of the air does not exceed 50%. Higher relative humidity can be allowed at lower temperatures, such as up to 90% at+20 ℃. Special measures should be taken for occasional condensation caused by temperature changes;
4. Pollution level: Level 3;
5. Installation category: III, IV;
6. It should be installed in a place without significant shaking, impact vibration, and invasion of rain and snow. At the same time, the installation location should be free of explosive hazardous media, and there should be no gas or dust in the media that is sufficient to corrode metals and damage insulation;
7. The switch should not bear additional mechanical stress, and external cables and busbars should be fixed through insulators, etc. Note: For special usage environments, please consult with the manufacturer.
Parameters
| Specifications | Unit | DNH9-160 | DNH9-250 | ||
|---|---|---|---|---|---|
| Rated working voltage Ue | V | 230V AC | 415V AC | 1000V DC | 690V AC |
| Rated working current Ie | A | 160 | 160 | 250 | 250 |
| Agreed heating current Ith | V | 160 | 160 | 250 | 250 |
| Rated limited short-circuit current (with fused core) | kA | 100 | 100 | 30 | 100 |
| Usage category (with fused core) | AC-23B | AC-23B | DC-21B | AC-23B | |
| Rated insulation voltage Ui | V | 1000 | 1000 | 1000 | 1000 |
| Rated impulse withstand voltage Uimp | kV | 12 | 12 | 12 | 12 |
| Rated frequency | Hz | 50/60 | 50/60 | 50/60 | 50/60 |
| Electrical lifespan (number of cycles of operation) | times | 200 | 200 | 200 | 200 |
| Maximum torque | N.m | 30 | 30 | 30 | 30 |
| Executive standard: IEC60269-2/GB/T 13539.2 | 1 | 1 | 1 | 1 | |
| Rated working current In | A | 160 | 160 | 250 | 200 |
| Power consumption Pn | W | 23 | 23 | ≤ 32 | ≤ 32 |
| Surrounding air temperature | -5°C ~ + 40°C | -5°C ~ + 40°C | -5°C ~ + 40°C | -5°C ~ + 40°C | |
| Altitude | ≤ 2000m | ≤ 2000m | ≤ 2000m | ≤ 2000m | |
| Installation category and pollution level | III、IV | III、IV | III、IV | III、IV | |
| Transportation and storage | -25°C ~ + 55°C | -25°C ~ + 55°C | -25°C ~ + 55°C | -25°C ~ + 55°C |
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