What is the rated voltage of the transformer oil purification machine?

Transformer oil purification machines do not have a standard, fixed power rating like household appliances. Instead, their total power depends on processing capacity (L/h), the size of the vacuum system, heating power, and pump configuration. Different models vary significantly.

Below is a simplified overview to help you understand the typical power ranges and how power relates to equipment performance.

1. Power Range by Equipment Size and Processing Capacity

Small Portable Transformer Oil Purifiers

Flow rate: < 1000 L/h

Total power: ~ 3 kW – 15 kW

Use: Small transformers, on-site maintenance, low oil volume

Power sources: Small vacuum pump + oil pump + low-power heater

Medium Transformer Oil Purifiers (Most Common Type)

Flow rate: 1000 – 6000 L/h

Total power: ~ 15 kW – 40 kW

Use: Substations, power plants, routine transformer oil treatment

Notes: Heater takes the largest share of power

Large High-Vacuum Transformer Oil Purification Units

Flow rate: 6000 – 12,000 L/h

Total power: ~ 40 kW – 100 kW (or more)

Use: UHV transformers, converter transformers, deep dehydration/degassing

Configuration: Roots vacuum pump set + large heater + multiple circulation pumps

2. Power Consumption Breakdown (Where the Energy Goes)

Heater (Largest Power Load)

Typical range: 18 kW – 72 kW

Often configured in stages (e.g., 18/36/54 kW)

Purpose: Reduce oil viscosity, improve drying and degassing

Vacuum Pump System

Typical range: 3 kW – 15 kW

May include a rotary vane pump + Roots booster pump

Oil/Circulation Pumps

Typical range: 2 kW – 10 kW

Includes inlet, outlet, and boost pumps

Control System & Accessories

< 1 kW (PLC, sensors, solenoid valves, cooling fans)

Example:

A 3000 L/h purifier may have:

Heater: 36 kW

Vacuum pump: 5.5 kW

Oil pump: 3 kW

Other systems: 0.5 kW

The total installed power ≈ 45 kW, but the actual operating power is often lower.

3. Important Notes When Evaluating Power

Power Supply Requirements

Most units require three-phase 380V/400V

Large units may need dedicated power distribution

Small portable units may use single-phase or three-phase

Rated Power vs. Operating Power

Nameplate power = maximum installed power

Real operating power varies depending on:

Heater stage used

Oil temperature

Water content

Ambient conditions

Performance Depends on Flow Rate, Not Power Alone

Key indicators when selecting equipment:

Flow rate (L/h)

Ultimate vacuum (Pa)

Water content after treatment

Gas content after treatment

Breakdown voltage (BDV)

Power is only the supporting requirement to achieve these results.

Quick Summary (Easy to Remember)

Typical medium-sized transformer oil purifiers:

20 kW – 50 kW total power

Smaller units: 3–15 kW

Large high-vacuum units: 40–100+ kW

Always check the product nameplate for exact power of each component.