TAXONOMY: CMP_OLTC
On-Load Tap Changers (OLTC & DETC)
Vacuum & Oil-Break Tap Changers, Motor Drive Units & Regulating Relays
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Technical Baseline & Specification Parameters
| Switching Technology | Vacuum Interrupter (300,000 ops) or Oil-Break Diverter |
|---|---|
| Max Voltage | Up to 1,200 kV system voltage |
| Max Through-Current | Up to 3,000 A per phase |
| Step Voltage / Positions | Up to 35 tapping positions standard |
| Drive Mechanism | Motor Drive Unit (MDU) with SCADA/IEC 61850 |
Subcategories & Engineering Architectures
Vacuum In-Tank OLTC
Diverter switch inside separate oil chamber utilizing hermetic vacuum bottles to eliminate contact wear and oil carbonization.
Bell-Type / Selector OLTC
Combined selector switch for medium power transformers and industrial furnace applications.
De-Energized Tap Changers (DETC)
Off-circuit rotary or linear tap changers for seasonal or system tap adjustments.
Smart Motor Drive Units
Integrated tap position monitoring, motor current torque analytics, and optical encoder feedback.
Suppliers in this category (23)
Companies listed for this category. A listing is not a product certification. The identity badge is shown only after TransformerPath checks the organization and a business contact.
| Company & Location | Capabilities & Product Lines | Status | Action |
|---|---|---|---|
|
Maschinenfabrik Reinhausen (MR) Regensburg, Germany |
VACUTAP vacuum OLTCs, ECOTAP, and ETOS digital automation | Listed | Website ↗ · RFQ |
|
Huaming Power Equipment (HM) Shanghai, China |
Full range of vacuum and conventional on-load tap changers | Listed | Website ↗ · RFQ |
|
Easun MR Chennai, India |
Tap changers, motor drives and accessories for Indian & export markets | Listed | Website ↗ · RFQ |
|
CTR Manufacturing Pune, India |
On-load and off-circuit tap changers | Listed | Website ↗ · RFQ |
|
BTRAC Ltd Telford, United Kingdom |
Bushings (HV, LV), Tap changers (OLTC / DETC), Conservator tanks | Listed | Website ↗ · RFQ |
|
CTR Manufacturing Industries Ltd Pune, India |
Tap changers (OLTC / DETC), Monitoring / diagnostic devices | Listed | Website ↗ · RFQ |
|
Easun MR Tap Changers Chennai, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Easun Reyrolle Ltd Chennai, India |
Tap changers (OLTC / DETC), Buchholz relays, Monitoring / diagnostic devices | Listed | Website ↗ · RFQ |
|
Elprom Heavy Industries (VOLTAP) Sofia, Bulgaria |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Elprom Heavy Industries JSC Sofia, Bulgaria |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Huaming Power Equipment Co., Ltd. Shanghai, China |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Liaoning Jinli Electric Power Electrical Appliance Co., Ltd. (JINLI) Dandong, China |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Maschinenfabrik Reinhausen (MR / Reinhausen Group) Regensburg, Germany |
Tap changers (OLTC / DETC), Bushings (HV, LV), Monitoring / diagnostic devices, Breathers (silica gel), Pressure-relief devices | Listed | Website ↗ · RFQ |
|
Prolec GE Waukesha Waukesha, United States |
Bushings (HV, LV), Tap changers (OLTC / DETC), Monitoring / diagnostic devices, Oil treatment devices | Listed | Website ↗ · RFQ |
|
Emco Electronics LLP Mumbai, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
EMR Tap Changers Private Limited Chennai, India |
Tap changers (OLTC / DETC), Monitoring / diagnostic devices | Listed | Website ↗ · RFQ |
|
Macpower Switchgear Pvt.Ltd Ernakulam, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Onload Gears Private Limited Chennai, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Power Transformers Sales And Services (India) Private Limited Coimbatore, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Pradeep Sales & Service Pvt. Ltd. Mumbai, India |
Tap changers (OLTC / DETC), Monitoring / diagnostic devices | Listed | Website ↗ · RFQ |
|
Stesalit Ltd. Baddi, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Unipower Transformers Pvt. Ltd. Kochi, India |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |
|
Prolec GE Waukesha (Tap Changer Division) Waukesha, United States |
Tap changers (OLTC / DETC) | Listed | Website ↗ · RFQ |