ZN63S-12(VS1+) Indoor High Voltage Vacuum Circuit BreakerDetailed product description：

The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor high-voltage switchgear with a rated voltage of 7.2-12 kV. As a protection and control unit for power grid equipment and power equipment in industrial and mining enterprises.

The circuit breaker complies with China's national standards GB1984-89 "AC High Voltage Circuit Breaker", JB3855-96 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breaker", DL403-91 "Technical Conditions for Ordering 10-35kV Indoor High Voltage Vacuum Circuit Breaker" and relevant IEC standards, and has reliable interlocking function.

The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker can perform frequent operations and has the ability to open and close multiple times and quickly reclose.
The ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or assembled with the chassis to form a handcart unit for use.  

Normal operating conditions of ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker
a. Altitude: not exceeding 1000m
b. Environmental temperature
Maximum temperature:+40 ℃
Minimum temperature: -15 ℃ (storage and transportation allowed at -30 ℃)
c. Environmental humidity
Daily average relative humidity: ≤ 95%
Monthly average relative humidity: ≤ 90%
Daily average saturated vapor pressure: ≤ 2.2 × 10-3 MPa
Monthly average saturated vapor pressure: ≤ 1.8 × 10-3 MPa
d. A place without fire or explosion hazards, severe pollution, chemical corrosion, and severe vibration.  
If there are special usage conditions, please inform and negotiate with the manufacturer when placing an order.  

Model and meaning of ZN63S-12 (VS1+) indoor high-voltage vacuum circuit breaker

Technical data

1. Main technical parameters of circuit breaker

serial number	project	unit	Numerical value
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	Rated lightning impulse withstand voltage (peak)	kV	seventy-five
four	Rated short-time power frequency withstand voltage (1min)	kV	forty-two
five	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five	forty
six	rated current	A	six hundred and thirty	six hundred and thirty	one thousand two hundred and fifty	one thousand two hundred and fifty
			one thousand two hundred and fifty	one thousand two hundred and fifty	one thousand and six hundred	one thousand and six hundred
					two thousand	two thousand
					two thousand and five hundred	two thousand and five hundred
						three thousand one hundred and fifty
seven	Rated short-time withstand current (effective period)	kA	twenty	twenty-five	thirty-one point five	forty
eight	Rated peak withstand current (peak)	kA	fifty	sixty-three	eighty	one hundred
nine	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty	one hundred
ten	Rated short-circuit current duration	s	four
eleven	mechanical life	time	thirty thousand			ten thousand
twelve	Secondary circuit power frequency withstand voltage (1min)	V	two thousand
thirteen	Rated operating sequence	O-t-CO-tone-CO

Note: 20kA, 25kA, 31.5kA t=0.3s t^one=180s 40kA t=180s、t1=180s

2. Mechanical characteristic parameters of circuit breaker

serial number	project	unit	Numerical value
one	Contact opening distance	mm	9±1
two	Contact itinerary	mm	3±0.5
three	Contact closing bounce time	ms	≤2(40kA≤3)
four	Three phase asynchronous opening and closing	ms	≤2
five	Average opening speed	m/s	1.1±0.2
six	Average closing speed	m/s	0.6±0.2
seven	Opening time (rated voltage)	ms	≤50
eight	Closing time (rated voltage)	ms	≤100
nine	Rated closing and opening operating voltage	V	AC110/220 DC110/220
ten	Rated voltage of energy storage motor	V	AC110/220 DC110/220
eleven	Rated power of energy storage motor	W	70(40kA 100W)
twelve	Energy storage time	s	ten
thirteen	Accumulated allowable wear thickness of dynamic and static contacts	mm	three
fourteen	Main electrical circuit resistance	630A-1250A	≤45
		1600-2000A	≤35
		2500-3150A	≤25
fifteen	Contact pressure of closing contact	20kA-25kA	2000N-2500N
		31.5kA	3000N-3500N
		10kA	4500N-5000N

Product structure and working principle
1. Overall structure of circuit breaker
ZN63S-12(VS1⁺）The overall structure of the indoor high-voltage vacuum circuit breaker adopts the form of operating mechanism and arc extinguishing chamber arranged in front and behind, and the main electrical circuit part is a three-phase floor standing structure. The upper and lower outlet bases and arc extinguishing chambers are installed in a tubular insulation cylinder made of epoxy resin cast using APG technology, which is particularly resistant to creeping electricity. This structural design makes it difficult for dust to accumulate on the surface of the arc extinguishing chamber, which not only prevents the vacuum arc extinguishing chamber from being damaged by external factors but also ensures that it can exhibit high resistance to voltage effects even in humid, hot, and severely polluted environments.

2. Operating mechanism structure
ZN63S-12(VS1⁺）The indoor high-voltage vacuum circuit breaker is equipped with a new SS1 spring operated mechanism, which has manual and electric energy storage functions, a concise structure, and high reliability. The operating mechanism is placed inside the chassis in front of the arc extinguishing chamber, and the chassis of the circuit breaker is also used as the framework for the operating mechanism. ZN63S-12(VS1+）The indoor high-voltage vacuum circuit breaker integrates the vacuum arc extinguishing chamber and the operating mechanism into a unified whole, making the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reducing unnecessary intermediate links, lowering energy consumption, and making ZN63S-12 (VS1⁺）The performance of indoor high-voltage vacuum circuit breakers is more reliable. ZN63S-12(VS1⁺）The indoor high-voltage vacuum circuit breaker can be installed in both mobile switchgear and fixed switchgear.

3. Arc extinguishing principle
The vacuum arc chamber used in the circuit breaker has a very high vacuum degree. When the moving and stationary contacts are energized and disconnected under the action of the operating mechanism, an arc will be generated at the contact tip. At the same time, an appropriate longitudinal magnetic field will be generated in the contact gap to maintain the diffusion type of vacuum arc, and evenly distribute the arc on the contact surface for combustion, while maintaining a low arc voltage. When the current naturally crosses zero, residual ions, electrons, and metal vapor can recombine or accumulate on the contact surface and screen cover in a subtle amount of time. The dielectric insulation strength of the arc extinguishing chamber fracture quickly recovers, thereby extinguishing the arc and achieving the purpose of breaking. Due to the use of longitudinal magnetic field vacuum arc extinguishing chamber in vacuum circuit breakers. Therefore, it has a strong and stable ability to interrupt current.

4. Anti misoperation interlock
Circuit breakers can provide comprehensive and reliable anti misoperation functions.
a. After the circuit breaker is closed, it cannot be closed again before the circuit breaker is opened;
b. After the circuit breaker is closed, if the closing electrical signal is not removed in time, the internal anti bounce control circuit of the circuit breaker will cut off the closing circuit to prevent multiple reclosing;
c. When the handcart circuit breaker is not in the test position or working position, the circuit breaker cannot be closed to prevent it from entering the load zone in the closed state;
d. After the handcart circuit breaker is closed in the working or testing position, the handcart cannot move to prevent pulling out or pushing the load area in the closed state;
e. The circuit breaker can be configured with a closing lock according to user needs to prevent manual closing operations when the secondary control power supply is not connected.  

Operation and Maintenance
Pre-installation check
a. After opening the circuit breaker, it should be checked for any damage, whether the product nameplate and certificate of conformity match the purchase order, and whether they are in good condition before cleaning the surface dust, especially the insulation surface;
b. Operate the circuit breaker manually according to the regulations for energy storage, closing, and opening, and pay attention to observing whether the relevant instructions are correct;
c. Use the operating power supply to operate the circuit breaker for energy storage, closing and opening, and pay attention to observing whether the relevant instructions are correct;
d. Conduct power frequency withstand voltage insulation test;
e. During formal operation, please remove the dust protection cover as required for rated currents of 1600A and above;
f. Insert the dedicated push handle into the push hole, shake clockwise to advance, and counterclockwise to exit. The total stroke is 200mm. In the open state, shake the handle evenly to reach the working position or test position, and at the same time, the corresponding indicator light of the cabinet will light up. Do not use excessive force to damage the interlocking mechanism and position signal.