Glycol pumps for cooling inverters in wind turbines
Lightweight – Durable – Powerful – LC

Wind turbines need a frequency inverter to adapt the resulting frequency to the grid frequency. The conversion process releases a large amount of heat during operation that needs to be dissipated. This is a major problem mainly in offshore installations due to poor accessibility and maintainability.

For this reason, offshore wind turbines often need durable components. A popular design of the cooling unit is the use of a refrigerant consisting of a water-glycol mixture in combination with a canned motor pump.


Main requirements of the refrigeration unit / for offshore wind turbines:


Our solution: LC pump – durable, lightweight, powerful

Due to the limited space available and the need for a durable, maintenance-free system for wind turbines, canned motor pumps are increasingly being used.

Key benefits of the canned motor pump LC series specially designed for cooling inverters:

Durability Mean Time Between Failures (MTBF) > 130,000 h
Design Extremely compact
Price Attractive prices and low life-cycle costs
Flexibility Fast development to meet individual customer requirements
Safety Hermetically sealed system without media loss
Mounting Horizontal and vertical mounting as well as 90° versions
Weight Approx. –20 % weight compared to conventional
Protection Highest corrosion and fire protection

LC pump – technical data

Delivery rate (50 Hz) up to 19.2 m3/h (up to 320 l/min)
Pumping head (50 Hz) up to 38 m
Motor output 1.0 kW to 3.0 kW
Nominal pressure 10 bar
Operating temperature –40 °C to +80 °C
Weight < 42 kg
Noise level (50 Hz / 60 Hz) < 68 dB
Type of protection (motor) IP 66
Corrosion protection (paintwork) up to C5
Fire protection (paintwork) R1 and R7 for HL1, HL2 and HL3