Vd4/P 24 Unigear Zs1 Switchgear (24 kV) Withdrawable Vacuum Circuit Breaker

• Breaking Capacity: High Voltage Circuit Breakers
• Operation: Electric Type
• Speed: Normal Type Circuit Breaker
• Arc-extinguishing Medium: Vacuum
• Installation: Fixed/Drawable
• Structure: Vcb
• Model NO.: VD4
• Poles Number: 3
• Type: Circuit Breaker
• Function: Overcurrent Protection
• Certification: ISO9001-2000
• Transport Package: Carton
• Specification: IEC, GB
• Trademark: Rockwill
• Origin: China
• HS Code: 8535210000
• Production Capacity: 1000PCS

Product Description

Product Description

Withdrawable circuit-breakers

Withdrawable version circuit-breakers

for PowerCube modules (24 kV)

Description

VD4 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.

The operating mechanism is the EL trip-free stored energy type with independent opening and closing regardless of the operator's action. The EL operating mechanism is widely used in all VD4 series circuit-breakers with frontal control.

The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening and closing release).

The operating mechanism, the three poles and the current sensors (if installed) are assembled on a metal frame without wheels. The construction is extremely compact, strongly built and low in weight. 

VD4 series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices (Standards IEC 62271-100 and CEI EN 62271-100). 

Additionally, VD4 series circuit-breakers have been type tested for low temperature and marine applications (Germanischer Lloyd).

VD4 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
 
Advantages

Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. VD4 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:

• Short-circuit currents;
• Overhead lines under load and, no-load conditions;
• Cables under load and no-load conditions;
• Transformers under load and no-load conditions;
• Generators under load and no-load conditions;
• Ripple control system;
• Capacitor banks(also parallel switching) and Motors with starting currents above 600A;

 
Fields of application

Below is the list of SM6 range units used in MV/LV transformer substations and industrial distribution substations:

• Cable control and protection
• Overhead control and protection
• Transformers and distribution substations
• Motor and transformer control and protection
• Generator control and protection
• Capacitor bank control and protection

 
Diagrammatic sketch


Circuit-breaker operating mechanism

A Open/closed auxiliary contacts B Geared motor for closing spring charging C Built-in closing spring charging lever D Mechanical signalling device for circuit-breaker open/closed E Mechanical operation counter F Plug-socket connectors of electrical accessories in the truck G Signalling device for closing springs charged/discharged

H Service releases I Closing pushbutton L Opening pushbutton M Operating mechanism locking electromagnet N Additional shunt opening release O Transient contact P Contacts for signalling spring charged/discharged

Main characteristics
 

Circuit-breaker		VD4/P 24
Standards		IEC 62271-100
Rated voltage	Ur [kV]	24
Rated insulation voltage	Us [kV]	24
Withstand voltage at 50 Hz	Ud (1 min) [kV]	50
Impulse withstand voltage	Up [kV]	125
Rated frequency	fr [Hz]	50-60
Rated normal current	Ir [A]	630 / 1250 / 1600 / 2000 / 2500 / 3150
Rated breaking capacity (rated short-circuit breaking current symmetrical)	Isc [kA]	16 / 20 / 25 / 31.5 / 40
Rated short-time withstand current (3s)	Ik [kA]	16 / 20 / 25 / 31.5 / 40
Making capacity	Ip [kA]	40 / 50 / 63 / 80 / 100 / 125
Operation sequence		[O - 0.3 s - CO - 15 s - CO]
Opening time	[ms]	33 ~ 60
Arcing time	[ms]	10 ~ 15
Total breaking time	[ms]	43 ~ 75
Closing time	[ms]	30 ~ 60
Operating  temperature	[°C]	-5 ~ +  40

 

 

 

ATTENTION:

1.The payment term: We accept TT,30% deposit and 70% balance against copy of BL.
2.The delivery time: Usually it will take about 15-20 days.
3.The standard of package: Usually use strong plywood case for protection.
4.The material of transformer: We have two types, one is with copper and another one is with aluminum. It depends on your requirement. In fact, those two have difference if normal work well. Only except the long life. Copper is better and also higher price.
5.The logo: If you have good quantity, it absolute no problem to do OEM.
6.Our market: our products are popular in Indonesia, Philippines, Russia, USA, Middle East and so on. Some of them are our regular customers and some of them are developing. We hope you can join us and make mutual benefit from our cooperation..
7.Warranty: in 12 month since BL date.

OUR SERVICE:

1.quick response in before sales period help you got order.
2.excellent service in production time let you know each step we made.
3.reliable quality solve you after sale headache.
4.long period quality warranty ensure you can buy without hesitate.


WHY CHOOSE ROCKWELL:

1. One-stop supplier globally.
2. More than 10 years professional experiences in electrical appliance industry. 
3.We offer professional online technology support for perfecting your electrical solution free.
4. Experienced sales service and suggestion.
5. All the products with accessories under strict quality control and final inspection before shipping.
6. We can assure the powerful competitive price and reliable quality products.
7. Most competitive shipping rate from our own shipping forwarder.
8. Warranty assurance: 12 month
9. Whatever big or small order, we can provide you one-to-one service.  

CONTACT US:

Contact person: Mr. Chen Chengming
Tel:[phone]
Mobile:[phone]
 


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