Overload capability

Duty cycle with previous load

Duty cycle with previous load

S6 duty cycle with previous load

20 kW (25 hp) and 40 kW (50 hp) Basic Line Modules only

Duty cycle with previous load

Derating characteristics

Output power as a funcction of ambient temperature

Installation altitude

• >1000 ... 4000 m (3281 ... 13124 ft) above sea level
  • Reduction of the output current by 10 % per 1000 m (3281 ft), or
  • Reduction of the ambient temperature by 5 °C (9 °F) per 1000 m (3281 ft)
• >2000 ... 4000 m (6562 ... 13124 ft) above sea level
  • Operation on line supply systems with grounded neutral point, or
  • Operation with an isolating transformer with secondary grounded neutral point
    
    

Braking power with external braking resistor

The following duty cycles are defined for the braking modules of the 20 kW and 40 kW Basic Line Modules:

The maximum possible braking power P_max is calculated using the following formula:

P_max = U²/R

U = Activation threshold

R = Resistance value of the external braking resistor

The maximum braking power is achieved with the smallest permissible resistance value. The maximum possible braking power falls at larger resistance values.

Braking power of the 20 kW Basic Line Modules depending on the connected braking resistor

When the recommended braking resistor is used, the following values result for the maximum braking power or continuous braking power:

Braking resistor 6SE7023-2ES87-2DC0
Resistance value = 20 О© в†’ max. braking power = 30 kW; continuous braking power = 5 kW

Braking power of the 40 kW Basic Line Modules depending on the connected braking resistor

When the recommended braking resistor is used, the following values result for the maximum braking power or continuous braking power:

Braking resistor 6SE7028-0ES87-2DC0
Resistance value = 8 О© в†’ max. braking power = 75 kW; continuous braking power = 10 kW (limited by braking module)