Lenze EMB9352−C Bedienungsanleitung PDF herunterladen (Seite 76)

Dimensioning

Important notes



EDBMB935X DE/EN/FR 13.0

5 Dimensioning

5.1 Important notes

 Stop!

Thermal overload of brake chopper EMB9352 or of the brake

resistor.

If the value falls below the brake resistance R

B,min

or if the

maximum running time of the brake chopper / brake resistor is

exceeded, the components will be overloaded.

Possible consequences:

ƒ The components fail.

Protective measures:

ƒ Always implement the temperature monitoring of the brake

resistor into the emergency stop chain.

ƒ Please observe the running time t

and dead time t

off

of the

brake resistor and the brake chopper.

ƒ Calculate the generated braking energy of the application for

brake resistances <R

B,lim

. ( 79)

– Connect the brake chopper in parallel if the maximum values

of the brake chopper are exceeded.

EMB9352

Dimensioning steps

= 375 V U

= 725 V

= 765 V

B,lim

= 27 W R

B,lim

= 54 W

Brake

resistance R

<27 W <54 W

1. Calculate running time and dead time. ( 77)

– Condition "t

+ t

off

= 3 s" must be observed.

2. Dimension brake chopper and brake resistor .

(

 79)

³27 W ³54 W

1. Calculate running time and dead time. ( 77)

– The technical data of the brake resistor must be

observed.

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 173 174

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