Transformer Bushings (HV & LV)
Oil-Impregnated Paper (OIP), Resin-Impregnated Paper (RIP), Resin-Impregnated Synthetics (RIS) & High-Current Bushings
Technical Baseline & Specification Parameters
| Voltage Range | 1 kV to 1,200 kV AC / 800 kV DC |
|---|---|
| Current Rating | Up to 50,000 A (LV / Generator bushings) |
| Dielectric Technologies | OIP, RIP, RIS, Solid Porcelain, Gas-Insulated (GIS) |
| Pollution / Creepage | Heavy / Very Heavy (Class IV/e per IEC 60815) |
| Test Standard | Power factor / Tan Delta (≤ 0.5% at 20°C), Partial Discharge (≤ 5 pC) |
Subcategories & Engineering Architectures
OIP Bushings
Oil-Impregnated Paper core with hermetically sealed porcelain or composite insulator; legacy workhorse for bulk EHV applications.
RIP Bushings
Resin-Impregnated Paper dry-type core with silicone composite housing; explosion-proof, moisture-resistant, zero fire hazard.
RIS Bushings
Resin-Impregnated Synthetic mesh with zero cellulose moisture absorption; highest thermal endurance and lifetime reliability.
LV / Generator Bushings
High-current copper stem designs with forced-oil/air/water cooling options for GSU delta connections up to 50 kA.
Direct GIS Connections
SF6-to-oil terminations eliminating exposed overhead clearances in compact substations.
Verified Global Suppliers & Manufacturers (16)
Verified suppliers with independent factory documentation, technical capability certifications, and direct quotation channels.
| Company & Location | Capabilities & Product Lines | Status | Action |
|---|---|---|---|
|
Trench Group Bamberg, Germany |
RIP & OIP high-voltage bushings up to 1,200 kV | ✓ Verified | Website ↗ · RFQ |
|
HSP Hochspannungsgeräte Troisdorf, Germany |
Dry-type RIP & RIS bushings for EHV/UHV | ✓ Verified | Website ↗ · RFQ |
|
Yash Highvoltage Vadodara, India |
RIP & OIP bushings up to 765 kV | ✓ Verified | Website ↗ · RFQ |
|
Hitachi Energy Bushings Zürich, Switzerland |
Complete RIP, RIS, and OIP bushing portfolio | ✓ Verified | Website ↗ · RFQ |
|
ABB (bushings & transformer insulators) Zurich, Switzerland |
Bushings (HV, LV), Pressboard / insulation materials | ✓ Verified | Website ↗ · RFQ |
|
Trench Group / Trench Switzerland (Hitachi Energy) Basel, Switzerland |
Bushings (HV, LV), Monitoring / diagnostic devices | ✓ Verified | Website ↗ · RFQ |
|
HSP Hochspannungsgheräte GmbH (HSP) Cologne, Germany |
Bushings (HV, LV) | ✓ Verified | Website ↗ · RFQ |
|
Fuji Electric Co., Ltd. Tokyo, Japan |
Radiators / cooling systems, Monitoring / diagnostic devices, Bushings (HV, LV) | ✓ Verified | Website ↗ · RFQ |
|
COMEM Group Montebello Vicentino, Italy |
Bushings (HV, LV), Monitoring / diagnostic devices, Bushings (HV, LV) | ✓ Verified | Website ↗ · RFQ |
|
Bicron Electronics Company Canaan, United States |
Bushings (HV, LV), Monitoring / diagnostic devices | ✓ Verified | Website ↗ · RFQ |
|
BTRAC Ltd Telford, United Kingdom |
Bushings (HV, LV), Tap changers (OLTC / DETC), Monitoring / diagnostic devices, Buchholz relays | ✓ Verified | Website ↗ · RFQ |
|
PRESS-N-FORGE (India) Mumbai, India |
Breathers (silica gel), Bushings (HV, LV), Pressure-relief devices, Oil-level indicators, Monitoring / diagnostic devices | ✓ Verified | Website ↗ · RFQ |
|
SPX Transformer Solutions (Prolec-GE Waukesha) Waukesha, United States |
Bushings (HV, LV), Tap changers (OLTC / DETC), Monitoring / diagnostic devices, Oil treatment devices | ✓ Verified | Website ↗ · RFQ |
|
Modern Insulators Ltd Abu Road, India |
Bushings (HV, LV) | ✓ Verified | Website ↗ · RFQ |
|
Viat Instruments Pvt. Ltd. Kolkata, India |
Oil-level indicators, Buchholz relays, Pressure-relief devices, Temperature indicators, Bushings (HV, LV) | ✓ Verified | Website ↗ · RFQ |
|
ARES Transformer (Arestrafo) Ankara, Türkiye |
Buchholz relays, Bushings (HV, LV), Conservator tanks, Monitoring / diagnostic devices | ✓ Verified | Website ↗ · RFQ |