Lenze EVS9332xP Manual de usuario descargar pdf (Pagina 26)

100

101

Safety instructions

Thermal motor monitoring

Forced ventilated or naturally ventilated motors

2.2

2.2.1



2.2−2

EDSVS9332P EN 5.0−07/2013

2.2.1 Forced ventilated or naturally ventilated motors

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

Formula for release time Information

t +*(t) ln

1 *

z ) 1

Mot

 100

Mot

Actual motor current (C0054)

Rated motor current (C0088)

t Thermal motor time constant (C0128)

z Threshold value in C0120 (OC6) or

C0127 (OC8)

Formulae for I

x t load Information

L(t) +

Mot

100%

1 * e

L(t) Chronological sequence of the I

x t

load of the motor

(Display: C0066)

Mot

Actual motor current (C0054)

Ir Rated motor current (C0088)

t Thermal motor time constant (C0128)

If the controller is inhibited, the I

x t load is reduced:

L(t) + L

Start

 e

*



Start

x t load before controller inhibit

If an error is triggered, the value

corresponds to the threshold value set

in C0120 (OC6) or

C0127 (OC8).

Diagram for detecting the release times for a motor with a thermal motor

time constant of 5 minutes (Lenze setting C0128):

I = 3 × I

Mot N

100

120

0 100 200 300 400 500 600 700 800 900

1000

t [s]

L [%]

I = 2 × I

Mot N

I = 1.5 × I

Mot N

I = 1 × I

Mot N

9300STD105

Fig. 2.2−1 I

× t−monitoring: Release times for different motor currents and trigger

thresholds

Mot

Actual motor current (C0054)

Rated motor current (C0088)

x t load of the motor (display: C0066)

T Time

Parameter setting

Calculate release time and

xt load

Read release time in the

diagram

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 444 445

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Lenze EVS9332xP Manual de usuario Pagina 26

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