The DNH50 series DC Switch Disconnector is suitable for power systems with a rated voltage of DC 1500V and below, or AC 690V and below for 50/60Hz, and a rated current of 50A and below.
The product can be used for infrequent switching on and off to isolate and disconnect circuits. lt can be widely used in many industries such as construction,telecommunications, metallurgy, and solar photovoltaic systems.
1. Rotating double break point technology
Disperse arc when disconnecting, improve making capacity and breaking capacity, and improve product electrical life；
2. Knife blade contact structure
Connection is reliable,which improves short-time withstand current.
3. Magnetic Blowout Technology
Permanent magnets are set between the moving and static contacts, and magnetic blow-out arc extinguishing technology is adopted.
When arc comes into being between the moving and static contacts, it can be quickly stretched and extinguished,
4. Zero arc design
Zero flash over for whole series, smaller installation space, and safer to use;
5. High-temperature resistant housing
Made of UL94V0 grade flame-retardant material, preventing fire hazards during system faults.
6. UV-Resistant handle
Made from materials that comply with UL746C standards for long-term outdoor use.
7. Modular assembly structure
Allows flexible selection of pole numbers.
8. Easy Installation
Easy to install.Wiring and operation tools are not in the same direction, which improves the efficiency of tool use, reduces the space occupied by the product, and facilitates product replacement and maintenance.
1. Enhanced safety
The product uses advanced technologies to ensure safe operation and disconnection.
2. Long service life
Designed for durability with high mechanical and electrical life cycles.
3. Versatile applications
Suitable for various industries and power systems.
4. Compact design
The zero arc design minimizes installation space requirements.
1. Check whether the switch is in good condition and flexible operation before installation. The switch should be installed vertically.
Before installation, check whether the content of the nameplate meets the requirements. The confirmation switch should be in the off state.
Pull the switch operation handle, the arrow on the handle points to “0”, the switch is off, the arrow points to “I”, the switch is off.
2. The wiring terminal and wiring bare bus on the switch should be wrapped with insulation to prevent short circuit between phases.
3. If the extension shaft and the handle hole do not match, please do not pull the extension shaft, so as not to damage the internal parts, be sure to adjust the switch position to make the extension shaft and the handle hole match.
4. The switch should be maintained every six months. If the rotating part is not flexible, apply grease (MP-3 grease is recommended).
Check whether fasteners are loose. And for different situations to be repaired, if the damage is serious, stop the use.
1、Operating Temperature/Storage Temperature:
The normal operating ambient temperature range is -40℃ to +75℃.
If the ambient temperature exceeds +75℃ or falls below -40℃, users should consult with the manufacturer.
Storage temperature: -50℃ to +85℃.
2、Protection Level
Product protection level IP20, handle protection level IP66.
3、Relative Humidity
The relative humidity of the atmosphere should not exceed 50% at +40℃.
At lower temperatures, higher relative humidity is allowed. For example, at 20℃, the relative humidity can reach 90%.
Users should take special protective measures against occasional condensation due to temperature changes.
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GRL Electric Co., Ltd. is one of the leading companies in the Middle And High End market of low-voltage electric in China
