how much power does a 50 tph crusher need ？

The power requirement for a 50 TPH (tons per hour) crusher can vary depending on the type of crusher, the material being processed, and the specific design and efficiency of the equipment. However, a general estimate for a jaw crusher or an impact crusher can be about 50 to 100 kW (kilowatts).

For a more accurate calculation, you would need to consider factors such as:

1. Type of crusher (jaw, impact, cone, etc.)
2. Material characteristics (hardness, abrasiveness, moisture content, etc.)
3. Operational parameters (such as feed size and desired product size)

It is always recommended to consult the equipment manufacturer's specifications or speak with an engineer for precise power requirements tailored to your specific application.