VCB Contacts, Contact Arms and Insulation Sleeves
Compare tulip, static and flat VCB contacts, VS1 and ZN85 contact arms, and insulation sleeves using the model drawing, electrical duty and installed interface.
VCB Contacts, Contact Arms and Insulation Sleeves.
Browse tulip, static and flat contacts, VS1 and ZN85 contact arms, and sleeves by model drawing, electrical rating and installed interface.
VCB Model Drawings and Specifications
Select a model to view its outline drawing and listed configuration details.
How to Select VCB Contacts and Contact Arms.
Give engineering and procurement one consistent quotation brief. The five inputs below let us compare the installed component with the appropriate model drawing and define exactly what should be quoted.
- VCB model, pole and component position
- State the breaker series, such as VS1 or ZN85 where applicable, whether the component is moving or fixed, and its position in the primary circuit.
- Electrical rating and project duty
- Provide the voltage class, rated current, system frequency and any project requirement for short-time withstand or temperature rise.
- Mating interface and mounting geometry
- Confirm the contact form, diameter, mounting points, clearances and the installed arm or sleeve interface.
- Material, finish and insulation
- Identify the material, surface treatment and insulation requirement specified by the installed part, drawing or project documentation.
- Drawing, photos and purchase quantity
- Share the existing model, clear photos, key dimensions, an outline or assembly drawing, quantity and replacement or OEM scope.
VCB Contact and Contact Arm Technical Checks.
Use the model drawings with the installed component details to prepare an OEM or replacement quotation. These checks help engineering and procurement teams agree on the correct component before ordering.
01VCB contact interfacesMatch the contact form, electrical duty and installed geometry before asking for a replacement or OEM quotation.+
Check the VCB contact interface and drawing.
Current rating is only one ordering input. Compare the mating interface and selected model drawing with the installed VCB or switchgear connection before releasing a purchase order.
- Electrical duty
- Voltage class, rated current and applicable project duty.
- Mating geometry
- Mating diameter or flat-contact form, mounting details and clearance.
- Drawing comparison
- The selected model drawing plus an existing sample or assembly drawing.
02VS1 and ZN85 contact armsVCB series, arm profile, connection points and insulation interface all need to match the installed pole.+
Compare the contact arm with the VCB pole drawing.
Use the VS1 or ZN85 model drawing to compare the arm profile and connection arrangement before confirming the quotation basis.
- Breaker details
- VCB series, voltage class, rated current and installed pole position.
- Arm interface
- Arm profile, connection points, mating contact and insulation interface.
- Material requirement
- Required copper, aluminium or copper-aluminium construction and any specified finish.
03Contact-arm insulation sleevesMatch JR021 or JR022 sleeves to the installed arm and contact-joint geometry.+
Confirm the sleeve profile before ordering.
The sleeve is part of the installed contact-arm arrangement. Compare the inner diameter, profile, nominal length and required coverage with the actual assembly.
- Sleeve profile
- JR021 round or JR022 square sleeve construction.
- Drawing dimensions
- Inner diameter and nominal length shown in the selected model drawing.
- Installed arrangement
- Contact-arm profile, contact-joint coverage and required insulation arrangement.
VCB Contact and Contact-Arm Applications.
Use this guide to identify the product family for the installed application. Confirm the selected model drawing and installation dimensions before finalising a technical specification or purchase order. On a phone, scroll the table to compare all columns.
| Installed requirement | VCB contacts | Contact arms | Insulation sleeves |
|---|---|---|---|
| Indoor VCB primary pole | PrimaryMatch the contact form, current rating and mating geometry. | PrimaryMatch the VCB series, arm profile and connection points. | CheckConfirm the installed arm and sleeve profile. |
| Withdrawable primary disconnect | PrimaryCheck tulip or flat-contact geometry against the disconnect interface. | CheckDepends on the installed VCB pole construction. | Not typicalNot normally selected as a disconnect component. |
| Earthing or disconnector interface | PrimaryCheck the flat duckbill contact drawing and mating arrangement. | Not typicalNot normally used for this interface. | Not typicalNot normally used for this interface. |
| Replacement or OEM sourcing | CheckMatch the existing form, rating and drawing. | CheckMatch the VCB model, geometry and installed interface. | CheckMatch the sleeve profile and contact-arm interface. |
Request a VCB Contact or Contact Arm Quote.
Send the installed part details and purchase requirement together. The quotation can then be matched to the technical basis, quantity, delivery requirement and project scope.
VCB Contact and Contact Arm FAQs for OEM and Replacement Buyers.
Practical answers for engineers, switchgear manufacturers and professional procurement teams sourcing VCB conductive components.
What should be included in a VCB contact or contact-arm RFQ?
Send the existing component reference or VCB model, voltage class, rated current, installed pole position, dimensions or drawings, quantity and target delivery. For contact arms and sleeves, include the mating profile, mounting details and insulation requirement.
Can matching current rating alone verify a VCB contact replacement?
No. Match the contact form, mating diameter or flat-contact geometry, connection arrangement, pole position and the installed assembly drawing as well as the electrical rating. A rating match alone does not prove that the component will fit the installed interface.
How do I identify the correct VS1 or ZN85 contact arm?
Start with the breaker series and rated current, then compare the arm profile, connection points, mating contact and insulation arrangement with the installed pole. Use a drawing, measured dimensions or clear photos to establish the quotation basis.
When should a flat duckbill VCB contact be specified?
Specify a flat duckbill contact where the existing earthing or disconnector interface uses that mating form. Confirm the applicable voltage class, current range, mounting arrangement and selected outline drawing before ordering.
Can a drawing, photo or sample help identify a replacement VCB component?
Yes. A clear drawing, photo or sample is useful for comparing geometry, mounting and contact form. Include the VCB model and electrical rating so the component can be reviewed in its installed application rather than by appearance alone.
What should purchasing confirm before releasing a VCB component order?
Confirm the selected drawing or agreed component reference, quantity, material and insulation requirement, inspection or document needs, delivery requirement and approved technical specification. This gives engineering and procurement the same order baseline.