Lenze EVS9332xP Manual de usuario descargar pdf (Pagina 27)

Safety instructions

Thermal motor monitoring

Self−ventilated motors

2.2

2.2.2



2.2−3

EDSVS9332P EN 5.0−07/2013

2.2.2 Self−ventilated motors

Due to the construction, self−ventilated standard motors are exposed to an

increased heat generation in the lower speed range compared to forced

ventilated motors.

 Warnings!

For complying with the UL 508C standard, you have to set the

speed−dependent evaluation of the permissible torque via code

C0129/x.

The following codes can be set for I

x t monitoring:

Code Meaning Value range Lenze setting

C0066 Display of the I

x t load of the motor 0 ... 250 % −

C0120 Threshold: Triggering of error "OC6" 0 ... 120 % 0 %

C0127 Threshold: Triggering of error "OC8" 0 ... 120 % 0 %

C0128 Thermal motor time constant 0.1 ... 50.0 min 5.0 min

C0606 Response to error "OC8" TRIP, warning, off Warning

C0129/1 S1 torque characteristic I

rated

10 ... 200 % 100 %

C0129/2 S1 torque characteristics n

rated

10 ... 200 % 40 %

0.9

0 0.1

C0129/2

0.2 0.3 0.4

0.6

0.7

0.8

1.0

1.1

0.132

I / I

n / n

C0129/1

9300STD350

Fig. 2.2−2 Working point in the range of characteristic lowering

The lowered speed / torque characteristic (Fig. 2.2−2) reduces the

permissible thermal load of self−ventilated standard motors. The

characteristic is a line the definition of which requires two points:

ƒ Point : Definition with C0129/1

This value also enables an increase of the maximally permissible load.

ƒ Point : Definition with C0129/2

With increasing speeds, the maximally permissible load remains

unchanged (I

Mot

= I

rated

In Fig. 2.2−2, the motor speed and the corresponding permissible motor

torque () can be read for each working point (on the

characteristic () ... ).  can also be calculated using the values in

C0129/1and C0129/2 (evaluation coefficient "y",  2.2−4).

Parameter setting

Effect of code C0129/x

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 444 445

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Lenze EVS9332xP Manual de usuario Pagina 27

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