CTA7,AV3 type spring operated mechanismDetailed product description：

Overview
The 3AV3 and CTA7 connected spring operating mechanism is specifically designed to operate the 35KVR car style switchgear ZH85-40.5 indoor high-voltage vacuum circuit breaker. Its performance meets the requirements of GB1984 "AC High Voltage Circuit Breaker" and the "Technical Conditions" of this product, and all indicators meet or exceed the "ICP" standard.

There are two energy storage methods for the closing spring of the mechanism: electric motor energy storage and manual energy storage. There are two types of opening operations: electromagnetic opening and manual button operation; There are two types of closing operations: closing electromagnet and manual button operation.

The specifications and matching components of the institution are shown in Table 1

specification	weight	volume Height x Width x Depth	Electric power machine input power	Closing spring mm	Match vacuum circuit breaker Breaking current KA
3AV3	thirty-seven	630×380×410	two hundred and thirty	∮12	25, 31.5
CTA7	thirty-four	524×380×450	two hundred and thirty	∮12	25, 31.5

Main technical parameters
The energy storage motor adopts single-phase permanent magnet DC motor, and the basic technical parameters are shown in the table below;

model	ZYG-66
Rated working voltage (V)	-220, -110
Rated input power of electric motor (W)	two hundred and thirty
Normal operating voltage range	85% -110% rated working voltage
Rated working voltage energy storage time (S)	≤15

The closing electromagnet adopts a spiral tube electromagnet, and its technical parameters are shown in the following table;

model	-110	-220
Rated working voltage (V)	one point zero five	zero point nine six
Rated electrical power (W)	one hundred and fifteen	two hundred and eleven
Coil resistance value at 20 ℃ (Ω)	105±3	230±5
Normal operating voltage range	85% to 110% rated voltage

The opening electromagnet powered by an independent power source adopts a spiral tube electromagnet, and its technical parameters are shown in the table below:

Rated working voltage (V)	-110	-220
Rated working current (A)	one point zero five	zero point nine six
Rated electrical power (W)	one hundred and fifteen	two hundred and eleven
Coil resistance value at 20 ℃ (Ω)	105±3	230±5
Normal operating voltage range	65% -120% of the rated working voltage should be reliably tripped, and tripping is not allowed when the rated working voltage is less than 30%

Installation Position Diagram of CTA7 and AV3 Spring Operating Mechanism

Note: If the user has special requirements, they can be determined through negotiation.