PV Insert Epoxy Fiberglass Tubes for Terminal Insulators
Insulator inserts for PV and busbar terminal assemblies. PV insert tubes are the insulating core in terminal and busbar connectors. We machine them to the insert drawing with the ID/OD and shoulder the connector needs. Material is epoxy glass for moisture stability; we confirm the temperature and flame class from your application. ECR epoxy glass resists moisture better outdoors.
Technical specifications
| Material | Epoxy glass (G10/FR-4) |
| Use | PV / busbar terminal inserts |
| Form | Machined insert tube |
| Standard | ASTM D2583 (G10), IPC-4101 (FR-4), IEC 60672 (thermal). |
| Operating temperature | -40 °C to +130 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
Applications by industry
- PV junction-box and terminal insulator inserts
- Solar combiner box busbar isolation inserts
- Inverter DC-side insulating push-throughs
- PV panel string connector isolation sleeves
- Terminal rail post insulators in solar equipment
- Low-Creepage inserts for rooftop and utility PV
Why epoxy fiberglass for this application
PV DC busbars run ~1000 V+ with tight spacing, so the insert must keep high dielectric strength and low tracking in sun and humidity. Epoxy glass delivers this at compact section sizes.
p>UV and condensation drive tracking. Specify CTI 600+ grade for outdoor boxes. Confirm hole-wall clearance against live busbar creepage. specify CTI 600+ grade for outdoor boxes. Confirm hole-wall clearance against live busbar creepage.Standards: IEC 61730 / IEC 61215 (PV), ASTM D709, UL 94 V-0.
Feature and remaining-wall review
Machining PV Insert Epoxy Fiberglass Tubes uses diamond-coated tools so the edges stay clean, with CNC turning, grinding and drilling to your drawing. Dimensional stability is good when moisture content is controlled. Feature depth, edge distance and remaining wall are reviewed before quotation, and capability follows your drawing rather than a general tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Shaped HV Casing Parts (FR-4/G10)
Related insulation component from the WELLELE catalog.
G10 / FR-4 Epoxy Glass Washers
Related insulation component from the WELLELE catalog.
Filament-Wound Epoxy Tubing
Related insulation component from the WELLELE catalog.
Common questions
What are the typical applications for PV Insert Epoxy Fiberglass Tubes for Terminal Insulators?
Typical applications are PV / busbar terminal inserts. Give us the duty plus the environment, and we will either confirm this grade for PV Insert Epoxy Fiberglass Tubes or point you at the one that fits.
What material is used for PV Insert Epoxy Fiberglass Tubes for Terminal Insulators?
The material is Epoxy glass (G10/FR-4). It is supplied as machined insert tube. Alternate grades can be quoted against your drawing.
Is material certification supplied with PV Insert Epoxy Fiberglass Tubes for Terminal Insulators?
Batch records for PV Insert Epoxy Fiberglass Tubes include the material certificate of analysis. First-article inspection and dielectric strength testing are optional add-ons set by your specification.
Can PV Insert Epoxy Fiberglass Tubes for Terminal Insulators be made to our drawing?
Bore, wall and cut length on PV Insert Epoxy Fiberglass Tubes come from your drawing. Send the print with the quantity and the quote follows it.
Engineering Guides & Selection Notes
Related reading on the selection and specification decisions behind PV Insert Epoxy Fiberglass Tubes.
Get pricing for PV Insert Epoxy Fiberglass Tubes for Terminal Insulators
Send the drawing for PV Insert Epoxy Fiberglass Tubes with your annual volume. We check the material against the duty and tolerance on it, verify ID, OD, wall and features, then come back with manufacturability notes and pricing for PV Insert Epoxy Fiberglass Tubes.