Need help?Do you have a question about the Mitsubishi NF50-CP and is the answer not in the manual?
Explanation of ISTAC technology for improved arc extinguishing.
Details on Vapor Jet Controllers and their function in arc control.
How VJC in slot-breaking enhances arc extinguishing.
How digital ETR detects effective current values for accurate protection.
Description of the arc extinguishing mechanism using grids.
How the switching mechanism operates for ON, OFF, and TRIP conditions.
Detailed explanation of the switching mechanism's action.
Types of automatic tripping devices: thermal-magnetic, hydraulic-magnetic, electronic.
Operation of thermal-magnetic tripping for lower and higher current ranges.
How electronic trip relays function in MCCBs.
Tripping times for overcurrents at different percentages of rated current.
Effect of ambient temperature on thermal tripping characteristics.
Instantaneous trip settings and their adjustability for coordination.
Table showing characteristics for selecting and coordinating breakers.
Tripping only the device directly before the fault.
Economical approach using upstream breaker capacity for downstream protection.
Tables showing combinations for selective coordination.
Ensuring MCCB doesn't trip on starting current but coordinates with OLR.
Discussion on selecting MCCBs for motor branch circuits.
Factors like starting current, time, and safety margins for motor circuits.
Overcurrent and overvoltage protection for thyristor circuits.
Detailed explanation of power supply, transformer, and motor impedances.
Methods for calculating short-circuit current.
General| Poles | 2P, 3P, 4P |
|---|---|
| Rated Voltage (AC) | 240V, 415V |
| Trip System | Thermal-magnetic |
| Trip Curve | C |
| Rated Operational Voltage | 240VAC (2P), 415VAC (3P, 4P) |
| Mechanical Life | 20, 000 cycles |
To Next Page