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T +49 5066 90333-0
emergency(at)helmke.de 

 

Highlights

05.05.2017 HELMKE - Hannover Fair 2017 Electrical Machines and Drives expertise and innovation since 1922 [ [more] ]

6 MW HELMKE FULL LOAD TEST FIELDTo meet customers requirements and HELMKE's aspiration to work always with state of the art technologies, the HELMKE Group has invested in a new testing field on its location in Pulversheim, France. The testing field is also available for final customer inspections and external testing orders.[ [more] ]

HELMKE 24/7 DELIVERY PROGRAM 5 MW SOFTSTARTER AVAILABLE FROM STOCKThe HELMKE group, with a heritage of motor and generator sales/stock­ keeping/production going back more than 90 years, is continuously investing in its production facilities and its extensive stock. [ [more] ]

Examples of application

1. System Checkout at a Medium Voltage Drive

Scope of order:
Acceptance test at a system consisting of: Medium voltage frequency converter and asynchronous motor with no-load and load test as well as extensive function tests at the frequency converter.

Frequency converter    - 2,500 kVA; 6000 V; 50 Hz
Motor- 1,560 kW; frame size 500; 04-pole; 6,000 V; 50 Hz
- Speed range 0 - 1,500 min-1 (M ~ n2),
- Explosion protection Ex nA IIC T3 Gc
  • Performance of various function tests at the frequency converter (Failure of IGBT module, voltage drop in the power system, etc.)
  • Load test with temperature rise test and determination of the efficiency of the single components as well as of the total system
  • Analysis of the harmonic distortion
  • Overspeed test
  • Analysis of the vibration characteristics
     


2. Acceptance Test at an Oil-Cooled High Voltage Machine

Scope of order:
Acceptance test at a converter-fed high voltage machine with direct oil cooling. Performance of an extensive no-load and load test at different speeds.

Particularities:
The directly oil-cooled machine requires the installation of an oil re-cooling system.

Motor- 800 kW; frame size 315; 04-pole; 4,000 V; 73 Hz
- Speed range 500 - 2160 min-1 (T = constant)
  • Recording of no-load characteristic at various speeds
    (Supply frequencies 17, 33, 50, 60, 73 Hz)
  • Load tests with temperature rise test and determination of the efficiency at various speeds (Supply frequencies 17, 33, 50, 60, 73 Hz)
  • Overspeed test
  • Analysis of the vibration characteristics
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