Is there a difference in the concept of charging the circuit breaker NT & NW?
The concept is the same .The springs in the circuit breaker operating mechanism must be charged to store the energy required to close the main contacts. The springs may be charged manually using the charging handle or automatically by the optional MCH gear motor.
Pull the handle down seven times until you hear a "clack".
If the MCH gear motor is installed, the spring is automatically recharged after each closing.