By using water-cooled resistors, the heat development that usually occurs at the location of use is prevented. During braking processes, the electrical drive energy is converted to heat energy. This heat energy is absorbed by the water and can be re-used.

A new range of water cooled resistors EV2 is available in modular construction and can be stressed up to 25 kW per module.

Rheostatic braking of all types of low and medium voltage AC drives in:

• Braking resistor applications
• Hybrid and all-electric vehicles
• Winched and cranes
• Cable laying vessels
• Propulsion drives on ships or oil rings
• Test laboratory applications
• Dummy loads and discharge resistors for MV (Medium Voltage) electrical systems
• Liquid heating
• Mining area
• For use on vehicles such as trucks, tram or locomotive

Generally the water cooled resistors are preferably used for the applications, at which a heat generation is not desirable or not allowed or a water cooling circuit is still existing. Please note that the water cooled modules are not suitable for a very dynamic load or a impulse stress applications.

Technical Data:

• Continuous power 25 kW per module / up to 100 kW with 4 modules
• Ohmic value: min: 0,1 Ohm and max: 20 Ohm per module
• Working voltage: up to 1500 V; Test voltage: 7,2 kV
• Overloads: 10 % for 60 s, 20 % for 15 s, 30 % for 5 s
• Ingress protection to EN60529: IP 56
• Dimensions per module: 300 x 102 x 164 mm height
• Weight: 2,6 kg per module

Cooling:

Fresh water or water-glycol
Ambient temperature:

• -30° up to +50° C (operation)
• -40° up to +80° C (storage)