Spring-operated circuit breaker control, signaling circuit

There are many varieties of spring energy storage operating mechanisms, and CT7 type is often used in circuit breakers of iokV and below in factories and enterprises.
    The spring energy storage motor of the CT7 type mechanism adopts a single-phase AC and DC series motor with a rated power of 369W.
1 to 4 trip coils can be installed in the operating mechanism. The circuit breaker control and signal circuit
    using CT7 type mechanism is shown in Figure 6-69. In the figure, SA is the control switch, which can be LW5 type or LW2 type; YA is the closing coil of the circuit breaker QF; YR is the tripping coil; sQ is the motor travel switch (terminal switch); M is the energy storage motor; SB is the button ; Hi is a green indicator light; Hz is a red indicator light. When the circuit breaker trips in an accident (overcurrent relay KA contact is closed), YR acts.