Hot Selling Series Hv Vacuum Circuit Breaker 12kv Rated Voltage, Three Phase Current 50Hz

• Customization: Available
• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Manual Type or Electric Type
• Model NO.: KJ-MMT
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Vacuum
• Installation: Fixed or Insert
• Structure: ACB
• Poles Number: 3
• Type: Circuit Breaker
• Function: Conventional Circuit Breaker
• Certification: ISO9001-2000
• Non-Standard: Customizable
• OEM: Yes
• Technical Capacity: Old Fashioned Circuit Breaker to Figure Custom
• Selectable Voltage: 7.2-12, 24, 36kv
• Transport Package: According to The Packaging Requirements of The Imp
• Specification: 1250A-31.5KA/4000A-50KA
• Trademark: VKJ
• Origin: China
• HS Code: 8535210000
• Production Capacity: 6000 Pieces/Year

Product Description

Shanghai Kaiji Power Equipment Co., Ltd,which is located at #777 Yuegong Road, Jinshan Industrial Zone, Shanghai, is in the core area of "Yangtze River Delta". The unique location advantage builds good development platform and make manufacturing capacity and quality assurance capabilities to reach the international leading level.
Shanghai Kaiji specializes in manufacturing different kind of indoor high voltage vacuum circuit breakers, the main products are VKJ series with 7.2 KV - 24 KV - 35 KV and special circuit breaker lift vehicles.
Based on quality for growth, technology for development and service for market, our company always insists on such business philosophy. Shanghai Kaiji is willing to work with friends from home and abroad to develop together and win-win cooperation.

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Product Parameters

Technical data

 

1. 1. Main technical parameters of Model VKJvacuum breaker 

Table 1
 

No.	Parameter designation		Unit	Data
1	Rated voltage		kV	12
2	Rated insulation level	Power frequency withstand voltage at 1 min	kV	42
		Rated lightning impulse withstand voltage	kV	75
3	Rated current		A	630	1000	1250	1600	2000	2500	3150
4	Rated short circuit breaking current (effective value) Rated short time withstand current (effective value)		kA	20	20	20
				25	25	25	25
					31.5	31.5	31.5	31.5
						40	40	40	40	40
							50	50	50	50
5	Rated short circuit closing current (peak value) Rated peak withstand current  (peak value)		kA	50	50	50
				63	63	63	63
					80	80	80	80
						100	100	100	100	100
							125	125	125	125
6	Rated short circuit breaking current breaking times		Times	30.50x
7	Rated short circuit duration		s	1
8	Rated operating sequence			O-0.3s-CO-180s-CO
9	Mechanical life		Times	30000
10	Rated single capacitor bank breaking current		A	630
11	Rated back to back capacitor bank breaking current		A	400

Note:

1. When rated short circuit breaking current ≤31.5kA, rated short circuit breaking times is 50 times.

When rated short circuit breaking current >31.5kA, rated short circuit breaking times is 30 times.

1. When rated short circuit breaking current is 50kA, rated operating sequence is: O-180s-CO.180s. CO.

 

1. 1. Mechanical characteristic parameters after breaker is assembled and adjusted

Table 2
 

No.	Parameter designation	Unit	Data
1	Contact opening distance	mm	11±1
2	Contact travel	mm	3.5±0.5
3	Three phase switch on/off asynchroneity		≤2
4	Bounce time of switch-on contact	ms	≤2(for 40kA and above ≤3) a
5	Center distance between phases	mm	210±1.5 (275+1.5)  a
6	Rated short circuit breaking current	kA	20	25	31.5	40	50
7	Contact pressure of switch-on contact	N	2000±200	2400±200	3100±200	4500±200	6000±200
8	Average switch-off speed	m/s	0.9~1.3
9	Average switch-on speed	m/s	0.5~0.9
10	Breaking time	ms	30±10
11	Closing time	ms	50±10
12	Main circuit resistance in each phase of breaker b	µΩ	≤40
13	Main circuit resistance in each phase of breaker and cart c	µΩ	≤55
14	Bounce range of contact switch-off	mm	≤1
15	Allowable abrasion thickness of dynamic and static contact	mm	≤3

Note:

1. What in the parentheses is for product with rated current of 2500A and above.
2. Main circuit resistance of breaker is resistance between upper and lower outgoing lines.
3. Main circuit resistance of breaker cart is the resistance between upper and lower moving contacts.

 

1. 1. See Figure 3 and Table 3 for parameters of draw-out type breaker unit with binding type primary contact:

Table 3
 

Rated voltage (kV)	12	12	12	12	12	12
Rated current A	630/1000	1250	1600	2000	2500/3150	4000/5000
Moving contact arm closing circle D1	28	42	48/72	72	102	102
Static contact arm closing circle D2	35	49	55/79	79	109	109
Diameter of max. excircle D3	74	87	94/128	128	158	158
Number of moving contact stylus	24	30	36/48	48	64	82

Figure 3 Dimensions Related to Fitting of Moving and Static Contacts

 

1. 1. See Figure 4 for schematic diagram of secondary wiring of vacuum breaker:

Actuator of this breaker could be driven by AC or DC.
 

1. 1. Technical data of energy storage motor

This product adopts permanent-magnet type single direction DC motor with special speed reducer; change gear in the reducer is enclosed in a case filled with lubricating grease, output speed is 10r/min. Torque 25N.m. See the following Table 4 for technical parameters of motor.

Table 4
 

Model	Rated voltage (V)	Rated output power (W)	Normal working voltage range (V)	Energy storage time at rated voltage (s)
HDZ-70-30B	DC110 DC220	80	85%-110% rated voltage	≤15

Note: Allow AC/DC power supply for operation
 

1. 1. See Figure 5 for technical data of switching on/off electromagnet

	Switch on/off electromagnet
Rated operating voltage (V)	DC220	DC110
Coil power (W)	244	366
Rated current (A)	1.11	3.33
Current resistance (Ω)	198	33
Operating voltage range	Switch off 65%-120% rated voltage	switch on 85%-110% rated voltage

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