Product range — actual catalogue images
The product images below are hosted on the manufacturer's official website (rishenginsulator.com) and link directly to the manufacturer's catalogue. Click any image to view the full specification page in a new tab.
Risheng PX 1.2kV-160A and 1.2kV-400A low-voltage transformer bushing insulators.
ANSI low-voltage ceramic bushing insulator with mounting bracket and threaded stud.
10kV threaded porcelain bushing — multi-shed design for medium-voltage applications.
Pin-type porcelain insulator — for overhead distribution line support applications.
Product family overview
| Product family | Voltage class | Current rating | Typical FOB China per unit |
|---|---|---|---|
| Low-voltage transformer bushing | 1.2-3.6 kV | 160-3,150 A | USD 12-65 per unit |
| Medium-voltage transformer bushing | 10-15 kV | 250-3,150 A | USD 35-180 per unit |
| Medium-voltage transformer bushing | 20-35 kV | 250-2,000 A | USD 75-380 per unit |
| High-voltage transformer bushing (porcelain) | 72.5-145 kV | 630-2,000 A | USD 380-1,800 per unit |
| Pin-type distribution insulator | 11-33 kV | N/A (line support) | USD 4.50-22.00 per unit |
| Post-type insulator (station / substation) | 11-72.5 kV | N/A (structural) | USD 18-180 per unit |
| Disc insulator (suspension) | 11-220 kV chain | N/A (suspension) | USD 6-25 per disc |
| Cap-and-pin disc insulator | Standard 70-300 kN strength ratings | N/A | USD 4.50-12.00 per disc |
| Specialty (capacitor, reactor, breaker bushings) | Various | Varies | USD 65-1,200 per unit |
Voltage class and standards
| Standard | Coverage | Markets |
|---|---|---|
| IEC 60137 (transformer bushings) | Bushing for transformers and reactors | EU, IEC-aligned countries |
| IEEE C57.19 (transformer bushings) | Bushings for liquid-filled transformers | USA, IEEE-aligned countries |
| ANSI C57.12 (transformers) | Bushings as part of transformer specifications | USA, North America |
| GB/T 4109 (China national) | Insulating bushings for transformers | China; export with this spec |
| DIN 42533 (Germany) | Specific bushing dimensions | Germany, central Europe |
| ИО (Russian) | Russian electrical insulator standards | Russia, EAEU, former Soviet |
| BS EN 50386 (UK) | Insulating bushings up to 1kV / 3.6kV | UK, BS-aligned |
| IS 2099 (India) | Bushings for transformers and reactors | India |
| JIS C 4202 (Japan) | Transformer bushings | Japan, JIS-aligned |
Construction specifications
| Spec | Description | Typical values |
|---|---|---|
| Porcelain composition | C-110 alumina porcelain (high-strength); C-120 / C-130 for higher BIL | Mechanical strength 70-200 MPa |
| Glaze color | Brown / dark brown standard; gray for some markets; sky-blue for indoor | UV-stable glaze for outdoor service |
| Conductor material | Copper standard; aluminum for cost-sensitive applications | Conductor sized to current rating |
| Sealing system (transformer bushings) | Oil-tight gasket between porcelain and metal flange | NBR / Viton gaskets typical |
| Power frequency withstand voltage | For 10kV class: typically 42 kV (1 minute dry) / 30 kV (10 sec wet) | Per IEC 60137 / IEEE C57.19 |
| BIL (basic impulse level) | For 10kV class: 95-110 kV; for 35kV class: 200 kV; for 145kV: 650-750 kV | Required by transformer specification |
| Creepage distance | For polluted environments specify high creepage (25-31 mm/kV per IEC 60815) | Light pollution: 16 mm/kV; heavy: 25-31 mm/kV; very heavy: 31+ mm/kV |
| Mechanical cantilever load | For post insulators rated to specific cantilever | Standard 4-12 kN; specialty up to 25 kN |
| Mechanical tensile (suspension discs) | Standard 70/120/160/210/300 kN | Specified per chain configuration |
| Operating temperature | 40°C to +90°C standard; specialty -60°C to +120°C | Climate-appropriate spec |
Application-specific selection criteria
Transformer bushings interface with both the transformer (mechanical fit, oil-tight seal) and the high-voltage system (electrical performance). A "10kV bushing" from one manufacturer is not necessarily interchangeable with a "10kV bushing" from another even within the same standard, because mounting flange dimensions, oil-side dimensions, and connection details vary by national standard family (DIN, IEC, IEEE, GOST). Specifying replacement bushings requires documentation of: (1) original transformer manufacturer and model; (2) standard family (DIN 42533 vs IEC vs IEEE); (3) specific dimensions if non-standard; (4) BIL, current rating, creepage required.
For utility maintenance procurement, working from the transformer's nameplate and OEM bushing part number is the safe path. Quality Chinese manufacturers like Risheng can produce equivalents to most major OEMs (ABB, Siemens, GE, Crompton Greaves, Hyundai, Mitsubishi) with proper specification documentation. Specifying just "10kV bushing" without standard family and dimensional details delivers something that may or may not fit the actual transformer.
| Application | Insulator type | Critical specifications |
|---|---|---|
| Distribution transformer (utility pole) | 10/20/35 kV transformer bushing | Match transformer voltage; oil-tight sealing; UV-resistant glaze |
| Power transformer (substation) | 72.5-145 kV bushing (porcelain or RIP) | BIL match; PD level test certificates; bushing condition monitoring tap |
| Overhead distribution line (cross-arm) | Pin-type insulator 11-33 kV | Mechanical load (line tension); creepage for pollution class |
| Switchgear / RMU | Compact bushing (epoxy or porcelain) | Size constraint; PD level; GIS or AIS compatibility |
| Capacitor bank | Specialty capacitor bushings | Current rating matches capacitor; thermal cycling |
| Reactor (series, shunt) | Reactor bushing (similar to transformer but different mechanical) | Mechanical fault current handling; vibration tolerance |
| Breaker (oil-filled, SF6, vacuum) | Breaker bushing (specialty) | Mechanical fault current; pressure rating for SF6 types |
| Polluted environment (coastal, industrial) | High-creepage bushing/insulator | IEC 60815 pollution class; field history in similar service |
| Cold climate (-30°C ambient or below) | Cold-rated porcelain | Tested below -40°C; thermal-shock resistance |
| Hot/desert climate | UV-stable glaze; thermal cycling tested | Operating temp +90°C continuous capable |
Pricing brackets — wholesale
| Order tier | Total quantity | Discount | Lead time |
|---|---|---|---|
| Sample / spec verification | 1-10 units | List price; air courier | Catalog items 7-15 days; custom 30-50 days |
| Small wholesale | 20-100 units | 5-12% | 20-35 days for catalog; 45-60 for custom |
| Standard wholesale | 200-1,000 units | 12-20% | 30-50 days |
| Large project / utility purchase | 2,000-20,000 units | 18-28% | 50-90 days (single batch); split shipments possible |
| OEM / transformer manufacturer contract | Continuous supply | Negotiated; typically annual contract | Just-in-time per production schedule |
Order workflow — porcelain insulator procurement
View the full supplier profile, certifications, contact details, and complete product catalogue.
Pingxiang Risheng Electrical Porcelain (Risheng PX) — Chinese specialist manufacturer of high and low voltage electrical ceramics. Low-voltage transformer bushings (1.2-3.6 kV, 160-3,150 A); medium-voltage transformer bushings (10-35 kV, 250-3,150 A); high-voltage transformer bushings (72.5-145 kV); pin-type and post-type distribution insulators (11-72.5 kV); suspension disc insulators (70-300 kN); specialty bushings (capacitor, reactor, breaker). Compliant with IEC 60137, IEEE C57.19, ANSI C57.12, GB/T 4109, DIN 42533, Russian ИО, BS EN 50386, IS 2099, and JIS C 4202 standards. ISO 9001 / 14001 / 45001 certified. Routine test certificates per IEC 60137 provided with each shipment.
- Application analysis — define voltage class, current rating, BIL, creepage, mechanical loads, environmental conditions, and standard family (IEC/IEEE/DIN/GOST/etc.)
- Specification documentation — for replacement applications, document original equipment make/model and OEM part number; for new equipment, document the transformer/breaker/switchgear specification
- Sample order with type test — 1-3 units; verify dimensional accuracy, sealing system, and electrical performance via type test (independent test lab if needed, typically USD 800-3,500 per type test)
- Quality acceptance criteria — for production batches, agree on acceptance test plan: routine tests (PD measurement, dielectric tests) on 100% of bushings; type tests on samples; mechanical tests on samples
- Volume order with batch QC — typical 200-2,000 units per order; include pre-shipment inspection if order is large enough to warrant cost
- Field acceptance testing — for critical applications (power transformers, large substations), perform commissioning tests (PD, dielectric, oil sample) before energizing; document for warranty
- Series replenishment — utility maintenance orders typically aligned with annual outage planning + emergency stock for storm restoration
Frequently asked questions
Companion guide for low-voltage components — distribution gear works alongside porcelain bushings.
Companion guide for distribution switchgear — porcelain insulators interface with these systems.
Companion guide for power electronics — works with electrical distribution infrastructure.
Source: Product images on this page are hosted on the manufacturer's official website (rishenginsulator.com) and link directly back to that website. All product information was summarised from the supplier's public catalogue.
Brand mentions and trademark compliance: References to Tier-1 transformer and bushing manufacturer brands (ABB Micafil, Siemens, GE, Hyundai, Crompton Greaves, BHEL, Mitsubishi, Hitachi) are made for the sole purpose of describing functional benchmarks and equivalence reference. Risheng (Pingxiang Risheng Electrical Porcelainfor Co., Ltd.) is not authorized by, affiliated with, or endorsed by any of these brand owners. Products are manufactured under Risheng's own brand or buyer-private-label only.
High-voltage safety: Porcelain insulators handle voltages from 1.2 kV through 145 kV+ which can be lethal. Installation, testing, and maintenance must be performed by qualified electrical workers with appropriate personal protective equipment per local electrical safety regulations (OSHA 1910.269 in USA, EN 50110-1 in EU, IEC 61936-1 globally). Improper installation can cause flashover, equipment damage, fire, or serious injury / death. Verify all required local certifications and engineering review before commercial deployment.
Standards verification responsibility: Buyer is responsible for verifying that received porcelain insulators meet all required electrical, mechanical, and dimensional specifications for the specific application. Routine test certificates from supplier should be verified; independent type testing from accredited high-voltage labs (CESI, KEMA, KEPRI, etc.) is recommended for critical applications. Specifying without proper standards documentation increases risk of incompatibility or field failure.
Pricing & specifications: All price ranges, voltage class capabilities, and tier definitions reflect general market observation. Confirm current pricing, MOQ, lead time, and configuration directly with the supplier.
No middleman role: CifyChina provides supplier discovery and editorial content. All transactions occur directly between buyer and supplier through the contact channels published on the supplier's official website.
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