Home/ProductsHigh Voltage

High Voltage Motors

Cage-rotor high-voltage machines at 3.3 kV, 6 kV and 10 kV for mill, fan, compressor and hoist duty.

YKK / YXKK

6 kV and 10 kV, 185–3150 kW

6 kV / 10 kV185–3150 kWIC611 / IC616

View details

YE compact high-voltage three-phase induction motor

YE3 Compact HV

Compact 3.3 kV / 6 kV, 185–3150 kW

3.3 kV / 6 kV185–3150 kWIP55 / IP65

View details

Technical articles on these series

Surge-Arrester Selection for High-Voltage Motors

Coordinate high-voltage motor surge protection with system grounding, switching studies, insulation data, cable layout and arrester lead length.

Read

Motor Air-Gap Inspection: What Uneven Readings Can Mean

Take repeatable motor air-gap measurements and distinguish assembly offset, bearing position, rotor sag and frame distortion before deciding corrective work.

Read

Partial Discharge Testing for High-Voltage Motors

How to select a partial-discharge test context and compare high-voltage motor results without treating one magnitude as a condition rating.

Read

6 kV and 10 kV Motors: When High Voltage Makes Sense

How to compare a 6 kV or 10 kV motor with a low-voltage motor and transformer, without relying on a false universal power threshold.

Read

Approved Motor Drawing Review Before Manufacture

A practical motor drawing review covering dimensions, shaft and mounting interfaces, orientation, accessories, notes and revision control.

Read

Conveyor Motor Selection: Breakaway Torque and Restart

How to size conveyor motors for breakaway, loaded restart, acceleration, backstops and multi-drive load sharing instead of running kW alone.

Read

Crusher Jam Restart: Motor and Drive Questions

A practical review of trapped load, clearing method, reverse jog, torque limits and protection before restarting a jammed crusher.

Read

Fan Motor Acceleration: Inertia Matters More Than Running kW

Why fan starting studies need combined inertia, damper position, torque-speed data and terminal voltage rather than running power alone.

Read

Fixed and Floating Bearings in Electric Motors

How locating and non-locating motor bearings control rotor position, accommodate thermal growth and affect coupling replacement checks.

Read

Gas Compressor Motors: Reciprocating versus Centrifugal

Two compressor families, two different motor answers. The centrifugal one fails on a specification most enquiries never mention: how long the start takes.

Read

Selecting a High-Voltage Motor for a Cement Kiln-Head Drive

A cement-plant checklist for high-voltage kiln-head drive motors, covering load torque, starting, supply limits, dust, heat, cooling and mechanical fit.

Read

High-Voltage Motor Differential Protection

Practical engineering guidance on high-voltage motor differential protection, including the checks, evidence and common mistakes that matter before purchase

Read

Do High-Voltage Motors Have IE Classes? Only Inside a Narrow Window

High-voltage cage motors do get IE classes — between 200 and 2000 kW, above 1 kV to 11 kV, on two, four or six poles. Outside that, no class exists.

Read

Starting Methods for High-Voltage Motors

Practical engineering guidance on starting methods for high-voltage motors, including the checks, evidence and common mistakes that matter before purchase or

Read

Coupling Selection for Industrial Motor Drives

A practical coupling review for industrial motor drives covering torque, speed, misalignment, shaft fit and driven-equipment constraints.

Read

Industrial Motor Data Sheet Review: Fields That Must Agree

A buyer-side method for finding contradictions between motor ratings, duty, environment, mechanical interfaces, protection and drawings.

Read

Kiln Inching Drive Design: Torque Path, Brake and Interlocks

Specify a kiln inching motor as part of the complete gear train, including breakaway torque, engagement and safe mode transfer.

Read

Locked-Rotor and Stall Protection for Industrial Motors

How to separate normal acceleration, failure to accelerate and a running jam using motor thermal limits, speed evidence and load behaviour.

Read

Coastal Motor Specification: Salt, Condensation and Corrosion Control

A procurement checklist for motors exposed to salt, humidity, condensation, outdoor storage and marine maintenance conditions.

Read

Selecting Motors for Mining Crushers and Ball Mills

A motor-selection guide for mining crushers and ball mills, covering breakaway torque, inertia, starting, supply limits, dust and maintenance.

Read

Motor Failure Modes in Mining, Ranked by How Often They Come Up

Overheating and demagnetisation dominate mining motor failure talk. One of the two is specific to permanent-magnet machines and must be designed out early.

Read

Motor Acceleration Time and Stall Time Must Be Checked Together

A torque-speed and thermal review for confirming that a motor can accelerate its real load without exhausting stall withstand.

Read

Motor Auxiliary Power Supply Checklist

Commission heaters, blowers, brakes, pumps and sensors by checking each auxiliary supply, protection, interlock and failure response.

Read

Motor Drain Plugs and Condensation Management

Coordinate motor drains, mounting orientation, space heaters and inspection routines without compromising enclosure or certification requirements.

Read

Motor Baseplate Flatness: Measurement and Acceptance

Define the datum, support condition, measurement grid and foot-contact checks needed before alignment is treated as stable.

Read

Motor Bearing Storage and Handling: Receiving-to-Assembly Controls

Prevent bearing damage before motor assembly through traceable receiving, clean storage, correct heating and force application.

Read

Motor Bearing Temperature Alarm and Trip Settings

Set bearing temperature alarms from sensor location, bearing design, healthy baseline, lubrication and a tested operator response.

Read

Motor Cable Terminations: Electrical Fit and Mechanical Stress

Check motor cable lugs, glands, bend radius, support, phase spacing and screen termination without loading terminal studs or insulators.

Read

Motor Commissioning Baseline Data Worth Keeping

Create a repeatable electrical, thermal, vibration and process baseline at handover so future condition changes can be judged against evidence.

Read

Motor Cooling Air Recirculation at Site

Find and correct layouts where a motor draws its own heated discharge air because of walls, guards, ducts or nearby equipment.

Read

Motor Cooling Method IC Codes: What Buyers Need to Confirm

How to move beyond an IC cooling code by confirming airflow source, heat exchanger, auxiliaries and site interfaces for the motor.

Read

Motor Core Loss Testing Before and After Rewind

Compare stator-core condition before stripping and after repair using a controlled method, mapped hot spots and traceable acceptance criteria.

Read

Motor Current Signature Analysis: Useful Boundaries

Use motor current signature analysis as a repeatable trend with load, speed and supply context, then corroborate suspected faults with other evidence.

Read

Motor Earth-Fault Protection: Settings Need a System Study

A practical method for selecting motor earth-fault protection from system grounding, sensor placement, feeder boundaries and coordination evidence.

Read

Motor Factory Test Witness Plan: Hold, Witness and Review Points

Turn a motor inspection and test plan into clear hold, witness and document-review points with criteria, notice and release authority.

Read

Motor Fan Rotation and Cooling Airflow Checks

Verify shaft fan or independent blower direction, airflow path, guards, filters, interlocks and recirculation during motor commissioning.

Read

Motor Foundation and Grouting Inspection Checklist

A field-ready inspection sequence for motor foundations, baseplates, grout, anchor bolts, soft foot and final alignment.

Read

Motor Grease Quantity per Bearing: What Must Be Defined

Set relubrication quantity from the actual bearing, housing and grease path, then verify delivery and purge instead of copying a generic motor value.

Read

Motor Grounding and Earthing: Installation Checklist

Separate protective bonding from cable-screen and high-frequency current paths, then verify the installed motor before energisation.

Read

High-Potential Testing: What a Pass Result Does Not Prove

How to specify and review a motor high-potential test without confusing dielectric withstand with a complete insulation-condition assessment.

Read

Motor Load Test at Site: Build a Process Baseline

Collect a safe, repeatable motor baseline under real process load using electrical, mechanical and process measurements with a defined boundary.

Read

Motor Bearing Grease Compatibility: A Safe Changeover Checklist

Identify existing grease, verify compatibility, calculate relubrication needs and plan a controlled purge without overgreasing.

Read

Motor Nameplate Data and Document Control

Keep motor nameplate, approved data sheet, test report and drawings aligned through manufacture, inspection, commissioning and replacement.

Read

Motor No-Load Run Test: A Practical Checklist

Record supply, current, direction, vibration, bearing condition and temperature during a motor no-load run so results remain comparable.

Read

Motor Overload Trip Class: Match Starting Time and Thermal Risk

Select overload trip behaviour from the actual cold and hot start, motor thermal capability, process overload pattern and approved protection study.

Read

Motor Paint Damage and Field Corrosion Repair

Assess coating damage, corrosion depth, surface preparation and touch-up compatibility before returning an industrial motor to service.

Read

Motor Preservation When Commissioning Moves by Months

A storage control plan for industrial motors when project delays extend beyond transport packaging and the original commissioning date.

Read

Motor Protection CT Selection: Ratio, Burden and Saturation

Select and document current transformers for motor protection using load current, starting current, fault duty, relay burden and wiring.

Read

Replacement Motor Shaft Height: Base and Alignment Review

Check shaft height, adapter bases, shims, hold-down bolts and coupling geometry before approving a replacement motor installation.

Read

Motor RTDs and Bearing Temperature Sensors

Practical engineering guidance on motor rtds and bearing temperature sensors, including the checks, evidence and common mistakes that matter before purchase

Read

Motor Shaft Alignment: What to Record Before Startup

A field-focused guide to motor shaft alignment records, including machine condition, measurement basis and final evidence before startup.

Read

Motor Shaft Key and Keyway Fit: Avoiding Fretting

What to verify in a motor shaft key and keyway connection before assembly, including fit, contact, retention and hub installation evidence.

Read

Motor Receiving Inspection: Find Shipping Damage Early

A receiving checklist for crates, shock indicators, shaft locks, moisture, bearings, accessories and claim evidence before storage.

Read

Motor Space Heater Control Logic: Interlocks, Alarms and Commissioning

Define when a motor anti-condensation heater is energised, how it is interlocked and what must be tested before service.

Read

Motor Space Heaters and Condensation Control

Practical engineering guidance on motor space heaters and condensation control, including the checks, evidence and common mistakes that matter before purchas

Read

Motor Starting Voltage Drop: A Review That Includes the Load

How to screen motor starting voltage drop, then test the source, starter, motor torque and driven-load acceleration as one system.

Read

Motor Terminal Box Position and Cable Entry Planning

A layout review for motor terminal boxes covering orientation, cable bend, gland space, phase segregation and maintenance access.

Read

How to Read a Motor Torque-Speed Curve

Read locked-rotor, pull-up, breakdown and rated torque on one curve, then compare the motor with the real load and starting voltage.

Read

Motor Visual Inspection: Acceptance Record and Punch-List Closeout

Turn factory or receiving inspection photographs into a traceable record of identity, condition, accessories, preservation and corrective actions.

Read

Motor Winding Resistance: When a Phase Difference Matters

A field method for comparing motor winding resistance without confusing temperature, test leads or terminal connections with a winding defect.

Read

Pipeline Booster Pump Motors: What the Station Decides

It looks like the easiest duty in the field — constant load, steady flow. Then you learn that capacity is changed by switching whole pumps in and out.

Read

PTC Thermistors vs RTDs for Motor Temperature Protection

A practical comparison of PTC thermistors and RTDs in motor protection, including measurement purpose, wiring and trip logic.

Read

Reciprocating Compressor Motors: Loaded vs Unloaded Start

How unloading, pressure equalisation, pulsating torque and restart conditions change motor selection for reciprocating compressors.

Read

Resonance, Unbalance or Misalignment? Follow the Evidence

A practical vibration investigation that uses direction, phase, location and speed response instead of diagnosing a motor from one spectrum peak.

Read

Selecting Motors for a Steel Rolling Mill Line

How to specify rolling-mill motors by stand duty, torque-speed envelope, overload, reversing, regeneration, cooling and mechanical shock.

Read

Site Acceptance Testing for Industrial Motors

A risk-based site test plan that verifies installation, protection and operating behaviour without blindly repeating factory tests.

Read

Sleeve vs Rolling Bearings in Large Motors

Practical engineering guidance on sleeve vs rolling bearings in large motors, including the checks, evidence and common mistakes that matter before purchase

Read

Surge Comparison Testing for Motor Windings

How to control winding scope, test connections and trace comparisons before treating a surge-test difference as a turn-insulation defect.

Read

Transformer Capacity for Large Motor Starting: A Voltage-Drop Study

Evaluate transformer impedance, source strength, concurrent load and accelerating torque before approving a large motor start.

Read

Axial Thrust in Vertical Motor Applications

How to define downward, upward and transient thrust before selecting a vertical motor bearing and coupling arrangement.

Read

Vertical Pump Motor Selection: Thrust, Flange and Shaft Checks

A buyer's review of vertical pump motor thrust responsibility, mounting fit, shaft setting, cooling and acceptance evidence.

Read

Comparing across families, or filtering by power, voltage and protection?See the full range with filters. If the duty falls outside what these series publish, tell us the application — custom builds cover ratings the standard series do not.