Have an emergency?

No problem. We are also available after business hours via our emergency cell phone. Contact us for any emergency service.

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

 

Highlights

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] ]

INFRARED MEASURING FOR THERMOGRAPHIC ANALYSIS IN MAINTENANCE, SERVICING AND REPAIRDuring normal operation electrical components and mechanical bearing parts are warming up but are protected against overheating by constructive measures. In case of failure typical local hotspots occur which may lead to consequential damages but these can simply be identified by thermal analysis. [ [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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