Busbar Insulation and Covers
S1-35 Flame Retardant Busbar Insulation Heat Shrink Tube 6 to 36 kV
The 36 kV flame retardant busbar grade in four phase colours for compact switchgear and collector substations
- Operating temperature: -40 to 105°C
- Minimum full recovery temperature: 125°C
- Voltage class: 6kV to 36kV
- Environmental friendly, RoHS compliant
- Shrink ratio: 2:1 & 2.5:1
- Standard Color: Red, Yellow, Green or Blue
S1-35 · Busbar Insulation and Covers
Product Overview
What S1-35 Does
Environmental friendly flame retardant polyolefin material, can be applied in 6kV to 36kV power switchgear, providing insulation enhancement, protection against flashover or accidental discharge. Especially suitable for switchgear with limited space, it can be used for circular and rectangular copper or aluminum busbars.
The 36 kV flame retardant busbar grade in four phase colours for compact switchgear and collector substations It is manufactured by Dalian United Polymer Material Co., Ltd. in Dalian China where radiation cross linking extrusion and molding are all performed in house under one quality system.
Key Benefits
- Full 6 to 36 kV coverage in four phase colours
- Flame retardant environmentally friendly and RoHS compliant
- Round and rectangular copper and aluminium bar
- 2:1 and 2.5:1 ratios for a wide bar section range
- Suited to switchgear with limited internal space
Who It Is For
Who Benefits Most from S1-35
The buyers and site teams this product was designed around
36 kV Switchgear Manufacturers
Compact 36 kV cubicles depend on insulated busbar to meet withstand within a small footprint.
Renewable Collector Substation Builders
33 and 35 kV switchboards built to a tight footprint and schedule.
Marine and Offshore High Voltage Systems
Vessels and platforms with 36 kV distribution where flame retardant is specified.
Heavy Industry Electrical Departments
35 kV plant distribution switchgear.
Problems It Solves
Problems This Product Removes
Every one of these is a failure mode we have seen on real networks
36 kV Clearances Drive Cubicle Cost and Size
Insulated bar is the practical route to a compact design.
Phase Identification Matters Most at High Voltage
Colour coded insulation reduces the chance of a switching error.
Pollution and Condensation on Bare 36 kV Bar
An insulated surface is far more tolerant of a dust or moisture film.
Fire Performance Is Specified in Marine and Plant Environments
The flame retardant formulation meets the normal requirement.
Application Scenarios
Where It Is Used
36 kV Switchgear Busbar
Main bar and droppers in compact 36 kV cubicles.
Renewable Collector Switchboards
33 and 35 kV collector substation bar.
Marine 36 kV Distribution
Vessel and platform high voltage switchboards.
Generator and Transformer Bars
Connection bar in tight cable boxes.
Switchboard Refurbishment
Reinsulating during a 36 kV overhaul.
Technical Data
Specifications and Dimensions
Test methods and requirements taken directly from the manufacturing specification
Technical Data
| Property | Test Method | Requirement |
|---|---|---|
| Specific gravity | ASTM D2671 | 1.1~1.3 |
| Thermal endurance | IEC 216 | 105°C minimum |
| Tensile Strength | ASTM D2671 | ≥10 MPa |
| Ultimate Elongation | ASTM D2671 | ≥300% |
| Heat Aging (136°C/168h) Tensile Strength Ultimate Elongation | ASTM D2671 | ≥8 MPa ≥200% |
| Long-term Heat Aging (100°C/3000h) Ultimate Elongation | IEC 60684-2 | ≥175% |
| Fluid resistance (23°C/168h) Tensile Strength Ultimate Elongation | IEC 60684-2 | ≥8 MPa ≥200% |
| Water absorption (23°C/24h) | ASTM D2671 | ≤1.0% |
| Low-temperature flexibility (-40°C/4h) | ASTM D2671 | No cracking |
| Heat shock (200°C/4h) | ASTM D2671 | No cracking, dripping or flowing |
| Dielectric strength | ASTM D2671 | ≥16 kV/mm |
| Volume resistivity | ASTM D2671 | ≥1.0×1013Ω·cm |
| Flammability | ASTM D2863 | Oxygen index 27 min. |
| Color fastness to light | IEC 60684-3-283 | Color stability, no change |
| Copper corrosion (150°C/168h) | IEC 60684-3-283 | No corrosion |
Dimensions
| Size S1-35 | As supplied (mm) Inner diameter D (min.) | After recovered (mm) Inner diameter d (max.) | Wall thickness t (nom.) | Standard length (m) |
|---|---|---|---|---|
| 25/10 | 25 | 10 | 3.5 | 15 |
| 30/12 | 30 | 12 | 3.6 | 15 |
| 40/16 | 40 | 16 | 3.6 | 15 |
| 50/20 | 50 | 20 | 3.6 | 15 |
| 65/25 | 65 | 25 | 3.6 | 15 |
| 75/30 | 75 | 30 | 3.7 | 15 |
| 85/35 | 85 | 35 | 3.7 | 15 |
| 100/40 | 100 | 40 | 3.7 | 15 |
| 120/50 | 120 | 50 | 3.8 | 15 |
| 150/60 | 150 | 60 | 3.8 | 15 |
| 175/75 | 175 | 75 | 3.8 | 15 |
| Products Slection | ||||
| Bus Bar Size (mm) | Single Layer Bus Bar | Double Layer Bus Bar | ||
| 20×3, 25×3 | Φ25/10 | Φ30/12 | ||
| 30×3, 30×4 | Φ30/12 | Φ40/16 | ||
| 30×10, 40×4 | Φ40/16 | Φ50/20 | ||
| 40×10, 50×5, 50×6 | Φ50/20 | Φ65/25 (Φ75/30) | ||
| 50×8, 50×10, 60×6, 60×8 | Φ65/25 (Φ75/30) | Φ75/30 (Φ85/35) | ||
| 60×10, 80×6, 80×8, 80×10 | Φ75/30 (Φ85/35) | Φ100/40 (Φ120/50) | ||
| 100×8, 100×10, 100×12 | Φ100/40 (Φ120/50) | Φ120/50 | ||
| 150×12, 150×15 | Φ150/60 | Φ175/75 |
CROSS REFERENCE · Tyco-Raychem: BPTM
Manufacturing and Quality
How It Is Made and Checked
Compounding extrusion radiation cross linking expansion and test all under one roof in Dalian
-
01
Compounding
Base polyolefin antioxidants flame retardants and functional fillers are mixed to a recipe held under our own formulation control rather than bought as a masterbatch.
-
02
Extrusion
The compound is extruded to the required wall and diameter. Co extruded products form two or three layers in a single pass so no interface can trap air.
-
03
Radiation Cross Linking
Electron beam irradiation creates the cross linked network that gives the material its shape memory. This step is what makes the product heat shrinkable.
-
04
Expansion
The cross linked part is heated expanded to its supplied diameter and cooled under tension so the expanded shape is locked in until heat is applied again.
-
05
Test and Inspection
More than 90 percent of product performance tests are carried out in our own laboratory including tensile elongation heat aging dielectric strength and tracking resistance.
-
06
Packing and Traceability
Each batch carries a production record so a delivered part can be traced back to its compound lot and process parameters.
Certification
ISO 9001:2015
Quality management system
IATF 16949:2016
Automotive quality management
ISO 14001:2015
Environmental management
ISO 45001:2018
Occupational health and safety
GJB 9001C-2017
Defence quality management
UL 224 E341796
Extruded insulating tubing
CE / RoHS
European conformity and restricted substances
CCS / ABS / DNV
Marine classification society approvals
Comparison
How S1-35 Compares
An honest comparison so you can rule this product in or out quickly
| Grade | Voltage Class | Fire Behaviour | Colours |
|---|---|---|---|
| S1(n)-10 | 6 to 24 kV | Halogen free | Red |
| S1(n)-35 | 6 to 36 kV | Halogen free | Red |
| S1-10 | 6 to 24 kV | Flame retardant | Four colours |
| S1-35 | 6 to 36 kV | Flame retardant | Four colours |
Use Guide
How to Select and Install S1-35
The sequence our engineers walk customers through on every first installation
-
01
Confirm the Voltage Class and Colour Scheme
Order by voltage class first then allocate colours per phase.
-
02
Measure Diagonal and Perimeter
The tube clears the diagonal and recovers onto the perimeter.
-
03
Deburr and Degrease
Sharp edges cut the tube and oil prevents a clean fit.
-
04
Shrink from the Centre Outward
Air escapes at both ends and the tube stays square.
-
05
Cover Bolted Joints Separately
Use S1-B molded lap joint covers.
-
06
Inspect for Full Conformity
No trapped air no wrinkles and no exposed metal at the ends.
FAQ
S1-35 Frequently Asked Questions
The questions buyers ask before they place an order
Can I mix S1-35 tube with S1-B covers
Is the tube suitable for outdoor kiosk substations
Is it halogen free
What bar sizes can it cover
Can it be applied to an installed bar
Do you supply a kit for a complete switchboard
Still need an answer ask our engineers on WhatsApp
Related
Related Products
S1-10 Busbar FR 24 kV
Flame retardant busbar insulation available in red yellow green and blue for phase identification up to 24 kV
VIEW DETAILS
S1(n)-35 Busbar HF 36 kV
The 36 kV halogen free busbar grade for switchgear where clearance is tight and smoke toxicity is regulated
VIEW DETAILS
S1-B Lap Joint Cover
Molded clip open covers that insulate bolted busbar joints and still allow inspection without damaging the connection
VIEW DETAILS
S1-A Overhead Line Cover
A wrap around insulating cover with a built in creepage device that clips onto a live route conductor without disconnection
VIEW DETAILSGet a Quotation for S1-35
Send us the voltage class conductor size and quantity and we will return a part number a price and a lead time. No form to fill in.