17.5kv Medium-Voltage Electric DC Circuit Breaker of Vmv Series

Model NO.: VMV


Operation: Manual & Electric Circuit Breaker


Arc-extinguishing Medium: Vacuum


Structure: Vcb Circuit Breaker


Type: Circuit Breaker


Certification: ISO9001-2000, Ohsas 180001


Rated Current: 1600A Circuit Breaker


mechanical Life: 10000times Circuit Breaker


Transport Package: Wooden Case Circuit Breaker


Origin: Zhejiang Ningbo Circuit Breaker




Breaking Capacity: Middle& High Voltage Circuit Breaker


Speed: Normal Type Circuit Breaker


Installation: Fixed & Withdrawalable Circuit Breaker


Poles Number: 3


Function: Overcurrent Protection


Rated Voltage: 17.5kv Circuit Breaker


Rated Frequency: 50Hz Circuit Breaker


Trademark: Mingde Circuit Breaker


Specification: OHSAS/ OHSMS 18001, ISO9001


HS Code: 8535210000


17.5kV Medium-voltage Electric DC Circuit Breaker of VMV Series



Product Overview



1. A brand new series of products, wider use in different fields and environment

2. Mechanical life up to 60,000 times

3. Expandable to smart circuit breaker



Operation Mechanism



VMV Modularized Operation Mechanism

VMV Modularized Operation Mechanism (with smart unit)

Modularized design of the operation mechanism is the highlights of VMV circuit breaker. With opening module and closing module in one part, the independent operation mechanism makes the standardized production and maintenance much easier.



Gear Driving System



We improved VMV circuit breakers' driving system, using the gear driving system instead of the traditional chain wheel driving system. The circuit breaker operation will run more smoothly with a longer mechanical life.

Opening Oil Buffer

The application of high-performance oil buffer can greatly reduce moving contact's over-swing and rebound during the circuit breakers' opening process. In this way, it avoids the reduction of mechanical life when vacuum interrupter is over-fatigue, resulted from contact's over-swing.



Main Specifications and Technical Parameters

Item	unit	Data
Rated voltage	kV	17.5
1 min power frequency withstand voltage	kV	50
Lightning impulse withstand voltage	kV	95
Rated frequency	Hz	50
Rated current	A	1600
Rated short-time withstand current	kA	20,25,31.5
Rated peak withstand current	kA	50,63,80
Rated short-circuit breaking current	kA	20,25,31.5
Rated short-circuit closing current	kA	50,63,80
Rated short-circuit duration	S	4
Contact over-travel	mm	3.5±0.5
Clearance between open contacts	mm	9±1/11±1
Average opening speed	m/s	1.1±0.2
Average closing speed	m/s	0.6±0.2
Opening time	ms	35-60
Closing time	ms	20-45
Rated operation sequence		O-0.3s-CO-180s-CO(<40kA)/ O-180s-CO-180s-CO(≥40kA)
Mechanical life	cycles	10000

External Dimension







VMV2-7.2, 12, 17.5-pole center distance 210mm

No.	Rated Voltage(kV)	Rated current(A)	Short-circuit breaking current(kA)	h1(mm)	h2(mm)	h(mm)	A(mm)	B(mm)
1	7.2,12,17.5	630-1250	20-31.5	260	205	622	438	609
2	7.2,12,17.5	630-1600	20-31.5	280	275	637	432	598
3	7.2,12	1250-1600	40	295	310	697	432	598
4	7.2,12	2000	31.5-40	295	310	697	432	598

VMV2-7.2, 12, 17.5-pole center distance 275mm

No.	Rated Voltage(kV)	Rated current(A)	Short-circuit breaking current(kA)	h1(mm)	h2(mm)	h(mm)	A(mm)	B(mm)
1	7.2,12,17.5	630-1250	20-31.5	280	275	637	432	598
2	7.2,12	1250-1600	40	295	310	697	432	598
3	7.2,12	1600-2500	25-40	295	310	697	432	586
4	7.2,12	3150-4000	31.5-40	295	310	697	432	586
5	7.2,12	3150-4000	31.5-40	295	310	733	432	586

Packaging, transportation and storage precautions



(1) Circuit breaker should be in the state of opening and energy storage spring in a state without energy storage when packing. It should be in the state of opening and energy storage spring in a state without energy storage when packing. And it should be fixed on the bottom of the wooden case, should have waterproof measures and complete package labels.

(2) Circuit breakers can't invert and avoid strong vibration, rain, surface damage, and components lost when transportation.

(3) When loading the circuit breaker, we suggest the following tools: crane, forklift and driving. When lifting the circuit breaker, we should not hook on the body or pole of the circuit breaker, but on the lifting hole which has the lifting mark.

(4) When circuit breaker has a long-term storage, it should be in a state of opening and energy storage spring in a state without energy storage and placed in dry ventilated indoor preventing from moisture, vibration control and harmful gas erosion, and regularly checked whether environment meets the requirements.

(5)When first use products after long-term storage, it need to have a power frequency withstand voltage Insulation testing.







Certificates

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Product Categories : Circuit Breaker