Starting resistors
STARTING - BREAKING - SHUNTING
Metallic resistors maode of expanded metal sheets whith a high heat capacity and good heat exchange coefficient. Rheostatic systems.
Statoric resistors
Standard :
- power from 0 to 600kW
- Start-up time : 6, 8, 12, 15 et 30 secondes
- 2 consecutive starts or 10 starts/hour
- Direct start-up
- Start-up with resistor
Individual calculations for specail specifications to be specified.
Contractors can be integrated
Rotoric resistors
Individual calculations using the following data to be specified :
- Power (kW)
- Rotor voltage
- Rotor current
- Number of start-up steps
- Peak at the first steps
- Start-up time or inertia of the machine being driven and speed
- High duty service :
- Number and duration of starts/hour
- Contractors can be integrated.
Choice criteria
- High start-up and braking frequency.
- Long start-up or braking duration.
- Harsh industrial environment, e.i. : H2S, high temperatures...
- No limit of power or voltage.
- Speed control, start-up, braking, electro-carriers.
- A.C. generator inductors discharge, electro-carriers.
- We can replace all units of the following brands : La Mécano Française, SEIEM, GEC France, FILTREX, TOLREX.
Braking resistors
Dissipation of energy generated by asynchronous squirrel cage motors which are controlled by speed variable drives.
Control cabinets
Fabrication of short-circuiting cabinets associated to the starting resistors. The control box allows the successive short-circuiting of resistors steps with power contractors, the working order is given by the line contactor of the customer (startor).
Additional services can be supplied on request.
Electrolytic starters
- Electrolytic starter always running in liquid phase / gradual and continuous resistance variation (this smoothness eliminates electrical peaks and mechanical shocks).
- Slip-ring motors: range from 0 up to 4000kW (higher ratings on request).
- Squirrel-cage motors : range from 0 to 400kW (star coupling).
Choice criteria
- Progressive, flexible ans smooth start-up.
- Easy adjustment requiring no calculation.
- Start-up repeatability.
- Suitable for real industrial conditions.
- Catalogued products.
- Easy to select.
- Integrated or easy to integrate commutation and motor protection.
- We can supply all spares of the following brands : CIM STARTERS, VECTROHM.