Fuse, class CC
SIEMENS Low-Voltage Power Distribution
The encapsulated fuse holders are tested and designed to the US National Electrical Code NEC 210.20(A) so that in continuous operation only 80 % of the rated current is permitted as operational current.
An operational current of 100 % of the rated current (30 A) is only permitted short-time.
The devices are prepared for the inscription labels of the ALPHA FIX terminal blocks 8WH8 120-7AA15 and 8WH8 120-7XA05.
There are three different series:
- Characteristic: slow, 3NW1 ...-0HG
For the protection of control transformers, reactors, inductances. Significantly slower than the minimum requirements of 12 s at 2× In as specified by UL for Class CC fuses.
- Characteristic: quick 3NW2 ...-0HG
For a wide range of applications, for the protection of lighting installations, heating, control systems.
- Characteristic: slow, current-limiting, 3NW3 ...-0HG
Slow for overloads and quick for short circuits. High current limitation for the protection of motor circuits.
Benefits
- For switchgear assemblies and mechanical engineers who export their plants. Compliance with the American standard is as follows:
- Approved according to UL and CSA for typical "branch circuit protection" applications. This facilitates export.
- Modern design with touch protection to BGV A3 ensures safe installation.
