CT8 type spring operated mechanismDetailed product description：

The new CT8 spring operating mechanism can be used to operate SN-I, SN10-10G low oil circuit breakers ZN28-12, ZN28A-12 series indoor high-voltage vacuum circuit breakers and circuit breakers with equivalent closing power.
The energy storage methods of the mechanism closing spring: CT8-I type has two types of energy storage: electric motor energy storage and manual energy storage, CT8-II type only has manual energy storage. The closing operation has two types: closing electromagnet operation and manual button operation. The opening operation has four types: opening electromagnet, overcurrent trip electromagnet or overcurrent trip device, undervoltage trip device and manual button operation.

Technical parameters of CT8 spring operating mechanism
1. The energy storage motor adopts two types of series excited motors, single-phase AC and DC, and their technical parameters are shown in the table below

model	HDZ-113	HDZ-113	HDZ-113
Rated working voltage (V)	Approximately equal to 110	Approximately equal to 220	Approximately equal to 380
Rated input power of motor (W)	<=450
Normal operating voltage range	85% -110% rated working voltage
Rated working voltage energy storage time	Less than 6

2. Manual energy storage operating force: When using a 300mm long energy storage handle, the maximum operating force is less than 20 kilograms.
3. Closing electromagnet: using a spiral tube electromagnet, its technical data

Rated working voltage (V)	-110	-220	-380	-48	-110	-220
Rated working current (A)	Less than 2.5	Less than 1.2	Less than 0.8	twenty-four	one point one	zero point five six
Rated working power (W)	Less than 275	Less than 264	Less than 304	one hundred and fifteen	one hundred and eleven	one hundred and twenty-three
Wire resistance at 20 ° C (W)	16.7±1.67	69±6.9	233±2.33	24.8±1.74	114±1.74	430±30
Normal operating voltage range	65% -120% rated working voltage, no disconnection is allowed when the rated voltage is less than 30%

4. The opening electromagnet and overcurrent release or overcurrent release electromagnet powered by an independent power source adopt a screw type electromagnet, and the undervoltage release adopts a snap on type electromagnet.
(1) Overcurrent release electromagnet (Type 1 release) or overcurrent release electromagnet (Type 2 release): The overcurrent release or overcurrent release electromagnet is powered by a current transformer, and its circuit is closed by the action of the packaged overcurrent relay contacts. The action value is set by the overcurrent relay. Overcurrent trip solenoid - rated currents are 3 amps, 3.5 amps, and 5 amps, respectively
(2) The technical parameters of a type 4 release electromagnetic coil powered by an independent power source are shown in the table:

Rated working voltage (V)	-110	-220	-380	-48	-110	-220
Rated working current (A)	Less than 2.5	Less than 1.2	Less than 0.8	twenty-four	one point one	zero point five six
Rated working power (W)	Less than 275	Less than 264	Less than 304	one hundred and fifteen	one hundred and eleven	one hundred and twenty-three
Wire resistance at 20 ° C (W)	16.7±1.67	69±6.9	233±2.33	24.8±1.74	114±1.74	430±30
Normal operating voltage range	65% -120% rated working voltage, no disconnection is allowed when the rated voltage is less than 30%

*Combination of release devices

Buckling device Combination code	Name and code of release device
	Overcurrent trip magnet one	over-current release two	Undervoltage release device three	Powered by an independent power source Opening electromagnet 4
	Number of release devices
one hundred and eleven	three	0	0	0
one hundred and ten	two	0	0	0
one hundred and thirteen	two	0	one	0
one hundred and fourteen	two	0	0	one

Schematic diagram of CT8 structure

CT8 type spring operated mechanism