VD4 12kV Medium-Voltage Indoor Vacuum Circuit Breaker, 630A–1250A Suppliers, Factory - Zhejiang Mingtuo Electrical Technology Co., Ltd.

VD4 12kV Medium-Voltage Indoor Vacuum Circuit Breaker, 630A–1250A

Description:

The MINGTUO VD4 12kV Vacuum Circuit Breaker (VCB) is a medium-voltage indoor breaker designed to provide precise protection and control for three-phase AC systems operating at 50Hz, with rated voltages from 3.6kV to 12kV. Supporting rated currents from 630A to 1250A, this breaker is ideal for indoor switchgear installations in substations, industrial facilities, and commercial power distribution systems. Employing advanced vacuum interrupter technology, it ensures rapid fault interruption, operational reliability, and long-term safety.

Applications:

Indoor medium-voltage switchgear panels

Industrial plants requiring reliable MV protection

Commercial infrastructure including hospitals, airports, and data centers

Systems demanding frequent operation and low-maintenance solutions

High Voltage Vacuum Circuit Breaker
VS1 Medium-Voltage Indoor Vacuum Circuit Breaker
VCB Composition

Under normal conditions, main contacts remain closed to allow continuous current flow. Upon detecting overcurrent or a short-circuit, the spring mechanism quickly separates the contacts, producing an arc contained within the vacuum interrupter. The arc is cooled and extinguished, safely isolating the faulty circuit and preventing damage to downstream equipment. This ensures high operational reliability and minimal maintenance needs.

Product Accessories

Insulating Cylinder
Bearer Supporting Bracket
Touch And Touch Arm Cover
Flexible Connection
Moving Contact
Main Product
Insulating Cylinder
Vaccum Tube

Withstand Voltage Test
Product Debugging
Product Debugging
Product Debugging
Product Debugging
Withstand Voltage Test
Mechanical Characteristic Testing
Product Debugging
Test the opening and closing speed, time, synchron
High Voltage Vacuum Circuit Breaker
VS1 Medium-Voltage Indoor Vacuum Circuit Breaker

To ensure transportation safety, our electrical products are exported in reinforced wooden crates. The crates undergo heat treatment and bear the ISPM-15 mark, enabling swift customs clearance. The raised base design facilitates forklift operation, while internal shock-absorbing fastening ensures the products arrive intact. All exterior crates are clearly labeled and comply with international logistics standards.

High and Low Voltage Switchgear (ACB, MCCB, VCB)
Box-Type Substation Featuring Our VCB, MCCB, and ACB
High And Low Voltage Cabinets Successfully Powered

Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
Box-typesubstation ACB VCB MCCB
Power transmission successful
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
Power transmission successful
Box-typesubstation ACB VCB MCCB
Power transmission successful
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB
Photovoltaic Grid-Connected Cabinet Utilising ACB and MCCB

No	Item	Units	Count value
1	The rated voltage	-	12 24 35
2	The rated voltage (short-term frequency tolerance 1min)	kV	42
3	The rated voltage tolerance lightning shocks peak	-	75
4	Rated frequency	Hz	50
5	Rated current	A	630、1250
			630、1250、1600、2000、2500、3150
			1250、1600、2000、2500、3150、4000
6	Rated short open circuit current	kA	20/25、31.5、40
7	The rated voltage short tolerance	kA	20/25、31.5、40
8	Rated short duration	s	4
9	Rated current peak tolerance	kA	50/63、80、100
10	Rated short-circuit current close	kA	50/63、80、100
11	The secondary circuit frequency voltage tolerance 1min)	V	2000
12	Rated singleback capacitor set open circuit current	A	630/400 (40kA 800/400)
13	Rated capacitor set close currents	kA	12.5 (frequency no greater than 1000Hz)
14	Break-brake time (rated voltage)	ms	≤50
15	Feeder time (rated voltage)	ms	≤100
16	Mechanical life	-	20000
17	Rated current open circuit times (life)	Switching	20000
18	Rated short-circuit current open circuit	-	50(40kA≤30)
19	Dynamic and static contact allow wear thickness	mm	3
20	The rated operating voltage feeder	-	-
21	The rated voltage break-brake operations	V	AC110/220 DC110/220
22	Storage motor rated voltage	-	-
23	Storage motor power rating	W	70
24	Storage time	s	≤10
25	Contact opening distance	mm	11 ± 1
26	Super-trip	-	3.5 ± 0.5
27	Closing contact bounce time	ms	≤240(A≤3)
28	Three-phase points, closing at different stages of sexual	-	≤2
29	Average gate speed (contact separation-6mm)	m/s	0.9–1.2
30	Average closing speed (6mm-contact closure)	m/s	0.5–0.8
31	Leading electric circuit resistance	μΩ	≤50(630a)、≤45(1250A) ≤35(1600–2000A)、≤250(2400)
32	Contactor feeder contact pressure	N	2000±200(2000A)、2400±200(25kA) 3100±200(31.5kA)、4250±250(40kA)
33	The rated operating sequence	-	Points - 0.3s - and points 180s - and -

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Wholesale VD4 12kV Medium-Voltage Indoor Vacuum Circuit Breaker, 630A–1250A

VD4 12kV Medium-Voltage Indoor Vacuum Circuit Breaker, 630A–1250A