Send the request type, manufacturer, equipment model/year, part reference, ratings, quantity, destination, required date, and any drawing or photo notes. The SUVELL team will review the request.
Compare linear and oil-immersed rotary off-load tap changers for de-energized transformer voltage adjustment. Select by winding and phase arrangement, rated through-current, tap range and positions, connection sequence, tank-cover mounting and operating interface.
Choose the linear or rotary configuration, then review the visible electrical duty, tap-position arrangement, transformer connection, mounting interface and engineering drawings before preparing the RFQ.
Three-phase linear tap changer configurations for off-circuit voltage adjustment, compared by rated through-current, insulation level, terminal arrangement and transformer interface.
Review technical data and drawings →
Oil-immersed single-phase rotary configurations selected by tap positions, contact sequence, shaft and handle arrangement, tank-cover mounting and available clearances.
Review technical data and drawings →
Oil-immersed three-phase rotary configurations compared by voltage and current duty, tap-position arrangement, terminal configuration, drawings and tank-cover interface.
Review technical data and drawings →
Three-phase five-position rotary configurations for off-circuit tap selection, coordinated with the transformer winding connection, operating handle and installation drawing.
Review technical data and drawings →
Review the visible configuration data and drawings, then coordinate the transformer duty, tap winding, connection sequence, tank-cover mounting, operating clearances and order documents.
On small screens, scroll the table horizontally.
| Technical parameter | WST 30 | WST 63 | WST 125 | |
|---|---|---|---|---|
| Phase number | Three-phase | |||
| Connection mode | Central point | |||
| Rated through current (A) | 30 | 63 | 125 | |
| Short-circuit capacity | Rated short-time withstand current (kA / 2 s) | 0.7 | 1.6 | 2.5 |
| Rated peak withstand current (kA) | 1.8 | 4 | 6.25 | |
| Rated frequency (Hz) | 50~60 | |||
| Insulation level (kV) | Rated voltage (kV) | 10 kV | 20 kV | 35 kV |
| Power-frequency withstand voltage (50 Hz / 1 min) | 42 kV | 55 kV | 95 kV | |
| Lightning impulse withstand voltage (1.2/50 μs) | 75 kV | 125 kV | 250 kV | |
| Sealing performance (kPa / 24 h) | 60 | |||
| Mechanical endurance (thousand operations) | 2 | |||
Review the visible configuration data and drawings, then coordinate the transformer duty, tap winding, connection sequence, tank-cover mounting, operating clearances and order documents.
Use these views with the transformer connection, tank-cover mounting and selected tap changer configuration.
On small screens, scroll the table horizontally.
| Technical parameter / selection item | Configuration / value |
|---|---|
| Product family | Oil-immersed rotatable single-phase |
| Technical parameter table | Confirm for the selected configuration |
| Phase arrangement | Single-phase |
| Tap positions and contact sequence | Customizable |
| Mounting arrangement and clearances | Customizable |
| Drawing and installation inputs | Required for configuration review |
Review the visible configuration data and drawings, then coordinate the transformer duty, tap winding, connection sequence, tank-cover mounting, operating clearances and order documents.
Use these views with the transformer connection, tank-cover mounting and selected tap changer configuration.
On small screens, scroll the table horizontally.
| Technical parameter / selection item | Configuration / value |
|---|---|
| Voltage classes | 15 / 25 / 35 kV |
| Rated current | 63 / 125 A |
| Product family | Oil-immersed rotatable three-phase |
| Model / terminal configuration | Customizable — confirm against project drawing |
| Tap positions and connection sequence | Customizable |
| Drawing and installation inputs | Required for configuration review |
Review the visible configuration data and drawings, then coordinate the transformer duty, tap winding, connection sequence, tank-cover mounting, operating clearances and order documents.
Use these views with the transformer connection, tank-cover mounting and selected tap changer configuration.
On small screens, scroll the table horizontally.
| Technical parameter / selection item | Configuration / value |
|---|---|
| Tap settings | +5% / +2.5% / 0 / −2.5% / −5% |
| Voltage options | 10 / 20 / 35 kV |
| Product family | 3P five-position oil-immersed rotary |
| Phase arrangement | Three-phase |
| Rotary operating handle and tank-cover interface | Customizable |
| Drawing and installation inputs | Required for configuration review |
Coordinate the electrical duty, tap winding, phase arrangement, number of service positions, tank-cover interface, operating access, drawings, inspection documents and delivery scope before quotation and manufacture.
Define inspection steps, product identification, protective packing, shipment documents and dispatch requirements for the selected configuration.
Confirm transformer kVA or MVA, winding and phase arrangement, rated through-current, frequency, tap range, step voltage and required service positions.
Provide tank-cover mounting, shaft length, handle direction, terminal layout, contact sequence, operating clearance and the de-energized operating arrangement.
Include applicable GA or interface drawings, connection sequence, marking, inspection documents, packing, quantity, destination and requested delivery timing.
Coordinate phase arrangement, tap positions, connection sequence, terminals, shaft or handle, mounting and marking with the transformer design.
Define inspection, test records, traceability, drawings, configuration sheets and shipment-document requirements for the order.
State quantity, destination, packing method, logistics constraints, consignee details and requested dispatch schedule.
Move the selected linear or rotary configuration through technical confirmation, production planning, assembly, inspection, packing and dispatch with one controlled set of order inputs.
Confirm tap changer family, transformer duty, phase, positions, connection sequence, mounting and drawings.
Align terminals, shaft or handle, materials, marking, quantity, inspection scope and delivery window.
Prepare the selected configuration, production route, work instructions and order identification.
Assemble the contact, mechanism, terminals and operating interface to the confirmed configuration.
Complete the specified checks, records, product identification, protective packing and shipment documents.
Confirm destination, logistics method, consignee details and the planned dispatch schedule.
Use these answers to compare linear and rotary configurations, understand de-energized operation and prepare the electrical, mounting and drawing inputs for selection.
Provide the transformer rating, winding and phase arrangement, rated through-current, required tap range and service positions, connection sequence, tank-cover mounting, shaft or handle orientation, available clearances, drawings or photos, quantity and destination.
A linear tap changer uses a linear contact and terminal arrangement, while a rotary tap changer uses a rotating contact mechanism. Select the family from the transformer winding connection, phase arrangement, tap positions, current duty, mounting interface and operating-access requirements.
An off-load or de-energized tap changer is intended for tap changes only after the transformer has been de-energized and isolated. Follow the equipment operating instructions, interlocking arrangement and site safety procedure before changing position.
Check the tank-cover opening and mounting pattern, shaft length and handle direction, terminal or lead layout, contact sequence, tap winding connection, operating clearance, oil-side arrangement and the applicable dimensional drawing.
Phase arrangement, tap positions, terminal layout, shaft or handle configuration, mounting, marking, inspection documents, packing and delivery scope can be reviewed against the transformer drawing and order requirements.
Share the transformer duty, tap winding, required positions, connection and mounting interface so SUVELL can review the configuration and quotation scope.
