12/24/36kv Medium Voltage Vacuum Circuit Breaker with Modular Mechanism and Embedded Pole

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Energy-storage Type
• Arc-extinguishing Medium: Vacuum
• Type: Circuit Breaker
• Certification: ISO9001-2000
• Transport Package: Plywood Case
• Trademark: JOYELECTRIC
• Origin: China
• HS Code: 85352100

Product Description

 

Product Description

12kV Vacuum Circuit Breaker 

1.As our No.1 hot saling product,it is our most popular product.
2.It is successful passed CE certification.
 

The VBD-12 indoor high-voltage vacuum circuit breakers produced by our company are widely used in indoor armored air-insulated switchgears, complying with GB 1984, DL / T 402, GB 311.1, GB 3309, GB / T 11022, GB / T 16927.1, IEC 62271-100 and other standards. Under normal use conditions, as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the power grid of the corresponding voltage level.

VBD-12 vacuum circuit breaker has excellent performance in the occasion of frequent operation or breaking short-circuit current. The circuit breaker fully meets the requirements of automatic reclosing and has extremely high operational reliability and service life.

 

It can be installed in KYN58, KYN28 and other armored middle cabinets.

 

Normal use conditions

1.The ambient temperature is not higher than + 40 ºC and not lower than -25 ºC (allow storage and transportation at -30 ºC)

2.Humidity: the average daily relative humidity is not more than 95%, and the saturated water vapor pressure is not more than 2.2kPa. The monthly average air relative humidity is not more than 90%, and the saturated water vapor pressure is not more than 1.8kPa

3.Altitude above sea level: no more than 1000m

4.Earthquake: Earthquake resistance: 0.2g horizontal ground acceleration; 0.1g vertical acceleration simultaneously. Resonance, sine, and beat wave test methods; 5 vibrations, 5 waves each, 2s interval, safety factor is not less than 1.67

 

 

Item	Unit	Value
Rated voltage	kV	12
Rated frequency	Hz	50
Rated power frequency withstand voltage (1 min)	kV	42
Rated lightning impulse withstand voltage (peak)	kV	75
Rated current	A	630	630	630	1250	1250
		1250	1250	1250	1600	1600
		1600	1600	1600	2000	2000
				2000	2500	2500
				2500	3150	3150
				3150	4000	4000
Rated short circuit breaking current	kA	20	25	31.5	40	50
Rated short time withstand current		20	25	31.5	40	50
Rated peak withstand current		50	63	80	100	125
Rated short circuit closing current (peak)		50	63	80	100	125
Rated dynamic and stable current		50	63	80	100	125
Rated breaking current of single or back to back capacitor bank	A	630/400
Rated short circuit current duration	S	4
Rated short circuit current breaking times	Times	50/30(40kA)
Opening time	ms	≤100/≤15
Rated operating sequence		O-0.3s-CO-180s-CO
Rated operating voltage	V	AC 110/220  DC 110/220
Percent of DC component of rated short-circuit breaking current	%	≤40
Mechanical life	Times	10000

 

 

Mechanical feature parameters of VCB after installation and adjustment

Item	Unit	Value
Contact clearance	mm	9±1
Overtravel of contacts	mm	3.5±0.5
Center distance between poles	mm	210±1.5/275±1.5
Out of simultaneity of CO operations of three poles	ms	≤2
Contact bouncing duration at closing operation	ms	≤2
Opening rebound amplitude	mm	≤2
Average opening speed (contact just open~6mm)	m/s	0.9~1.3
Average closing speed (6mm~ contact just close)	m/s	0.4~0.8
Opening time	ms	20-45
Closing time	ms	25-60
Main circuit resistance	μΩ	630A<60μΩ
		1250A<45μΩ
		1600A~2000A<35μΩ
		2500A~4000A<25μΩ
Allowed wear thickness of contact	mm	≤3

 

Technical parameters of operating mechanism

Item	Unit	Value
Rated power of energy storage motor	W	90
Rated voltage of energy storage motor	V	AC 110/220  DC 110/220
Energy storage time	S	<15
Voltage of closing coil	V	AC 110/220  DC 110/220
Voltage of opening coil	V	AC 110/220  DC 110/220
Current of closing coil	A	1.4(DC220)  2.8(DC110)
Current of opening coil	A	0.7(DC220)  1.4(DC110)

 

24kV Vacuum circuit breaker

1.Use spring energy storage.
2.Operating by two ways: manual or electric operation
3.The characteristics is accordance with GB1984-2003 AC High Voltage Circuit Breakers, JB3855-96 3.6~40.5kV indoor AC HV vacuum circuit breaker, relevant regulations of IEC62271-100 standard and the technical requirements of this product.
4.Use modular type operating mechanism and embedded pole The mechanical life is M2 and electrical life is E2
 

Main technical specification of VBDc-24 vacuum circuit breaker

	Name		Unit	Data
1	Rated voltage		kV	24
2	Rated frequency		Hz	50
3	Rated insulation level	Power frequency withstand voltage/min	kV	65
		Rated lightning impulse withstand voltage		125
4	Rated current		A	630	1250	1600	2000	2500	3150
5	Rated short circuit breaking current Rated short-circuit duration		kA	20	20
				25	25	25
					31.5	31.5	31.5	31.5	31.5
6	Rated short circuit making current		kA	50	50
				63	63	63
					80	80	80	80	80
7	Switching operations of short circuit current		Cycle	30
8	Rated short-circuit duration		s	4
9	Rated operating sequence			O-0.3s-CO-180s-CO
10	Mechanical endurance		Cycle	20000
11	Rated breaking current of single capacitor bank		A	630
12	Rated breaking current of back to back capacitor bank		A	400

40.5kV Vacuum circuit breaker

1.With the voltage of 40.5kV is three-phase AC, 50/60 Hz indoor power distribution equipment.
2.It's used for switchgear KYN61-40.5(Z)
3.It's accordance with GB1984 AC HV vacuum circuit breaker standard.
4.It effectively reduces the dimensions of VCB, the overall arrangement is reasonable and simple,with aesthetic appearance.
5.It has high reliable with characteristics of long life and easy maintenance and free-maintenance for operating mechanism.
6.Meet the "Five Preventions" function.

ZN85-40.5 series indoor high voltage vacuum circuit breaker is suitable for power system with rated voltage 40.5kV and three-phase AC 50 / 60Hz. The operating mechanism adopts a spring mechanism specially designed for this new type of circuit breaker, with high reliability and long service life; composite insulation is used to meet the insulation requirements under normal operating conditions; the circuit breaker handcart uses a screw nut propulsion mechanism device with a There is an overrunning clutch, which can easily move the handcart in the switch cabinet, so that the stroke range of the handcart is accurate and reliable; it is equipped with a forced mechanical lock to meet the requirements of the switchgear "five anti-interlocking" interlocking function. The circuit breaker is used in conjunction with KYN61-40.5 switchgear and is suitable for the control and protection of power transmission and distribution systems such as power plants and substations. The product design meets the requirements of GB 1984 "High Voltage AC Circuit Breaker"

 

Features:

1. Light and reliable operation: Combined with the advantages of the 40.5kV voltage level circuit breaker handcart propulsion mechanism at home and abroad, a flexible and reliable propulsion interlocking mechanism with optimized design, equipped with electrical and mechanical dual-channel anti-misoperation devices, is portable, safe and reliable.

2. High rated current: new large-capacity vacuum arc extinguishing chamber is selected, and advanced equipment is used to control the quality and thickness of the silver plating of the conductive loop to ensure a low main loop resistance and the maximum rated current of 2500A.

3. Strong corrosion resistance: The internal parts of the operating mechanism adopt advanced surface treatment technology to make the parts have stronger corrosion resistance and higher mechanical stability.

4. Complete cabinet distribution scheme: it can be equipped with standard KYN61 switchgear (1400mm wide) or small KYN61A switchgear (1200mm wide); high prototype can be equipped with 1600mm or 1680mm cabinet

5. High interchangeability: the use of advanced assembly tooling and cabinet inspection tooling to ensure that the circuit breaker has good consistency and cabinet interchangeability.

 

Applying ambient conditions

1. Ambient temperature: Max. Temperature: +40ºC, and average temperature daily should be no more than 35ºC. Min. Temperature: -15ºC.

2. Relative humidity: average relative humidity daily: ≤95%, average relative humidity monthly: ≤90%, average vapour pressure daily: ≤2.2kPa, average vapour pressure monthly: ≤1.8kPa

3. Altitude above sea level: no more than 2000m;

4. Earthquake intensity: not exceed 8 degrees.

5. It should be installed in condition without obvious dust, fire, chemical erosion, vapor and salt spray.

 

 

Item	Unit	Value
Rated voltage	kV	40.5
Rated frequency	Hz	50/60
Rated power frequency withstand voltage(1min)	kV	95
Rated lightning impulse withstand voltage(peak)	kV	185
Rated current	A	630	1250	1600	2000	2500	3150
Rated short circuit breaking current Rated short time withstand stable current 4s rated short time withstand current	kA	25	25	25
			31.5	31.5	31.5	31.5	31.5
Rated short circuit closing current(peak) Rated peak withstand current Rated dynamic stable current	kA	63	63	63
			80	80	80	80	80
Breaking times of short circuit breaking current	times	20
Rated thermal stability time	s	4
Rated operating sequence		O-0.3s-CO-180s-CO
Mechanical life	times	10000
Rated operating voltage	V	DC110/220  AC110/220