Danfoss VLT HVAC Basic Drive FC 101 Informações Técnicas descarregar pdf (Página 59)

3.10 Main Menu - Special Functions - Group

3.10.1 14-0* Inverter Switching

14-01 Switching Frequency

Option: Function:

Select the inverter switching frequency. Changing

the switching frequency can help to reduce

acoustic noise from the motor.

NOTE

The output frequency value of the frequency

converter must never exceed 1/10 of the

switching frequency. When the motor is

running, adjust the switching frequency in

14-01 Switching Frequency until the motor is as

noiseless as possible.

NOTE

Not all choices are available in all power sizes.

[0] Ran3 3kHz true random PWM (White noise modulation)

[1] Ran5 5kHz true random PWM (white noise modulation)

[2] 2.0 kHz

[3] 3.0 kHz

[4] 4.0 kHz

[5] 5.0 kHz

[6] 6.0 kHz

[7] 8.0 kHz

[8] 10.0 kHz

[9] 12.0kHz

[10] 16.0kHz

14-03 Overmodulation

Option: Function:

[0] Off Selects no overmodulation of the output voltage in

order to avoid torque ripple on the motor shaft.

[1] * On The over-modulation function generates an extra

voltage of up-to 8% of U

max

output voltage without

over-modulation, which results in an extra torque of

10-12% in the middle of the over-syncronous range

(from 0% at nominal speed rising to approximately 12%

at double nominal speed).

14-08 Damping Gain Factor

Range: Function:

96.0 %* [0.0 - 100.0 %]

3.10.2 14-1* Mains On/Off

Parameters for configuring mains failure monitoring and

handling.

14-12 Function at Mains Imbalance

Option: Function:

Operation under severe main imbalance conditions

reduces the lifetime of the motor. Conditions are

considered severe if the motor is operated contin-

uously near nominal load (e.g. a pump or fan

running near full speed).

When a severe mains imbalance is detected:

[0] * Trip

Select Trip [0] to trip the frequency converter.

[1] Warning

Select Warning [1] to issue a warning.

[2] Disabled

Select Disabled [2] for no action.

CAUTION

May cause reduced life time.

3.10.3 14-2* Trip Reset

14-20 Reset Mode

Option: Function:

Select the reset function after tripping.

Once reset, the frequency converter

can be restarted.

[0] * Manual reset

Select Manual reset [0], to perform a

reset via [RESET] or via the digital

inputs.

[1] Automatic reset x 1

Select Automatic reset x 1…x20 [1]-[12]

to perform between one and twenty

automatic resets after tripping.

[2] Automatic reset x 2

[3] Automatic reset x 3

[4] Automatic reset x 4

[5] Automatic reset x 5

[6] Automatic reset x 6

[7] Automatic reset x 7

[8] Automatic reset x 8

[9] Automatic reset x 9

[10] Automatic reset x 10

[11] Automatic reset x 15

[12] Automatic reset x 20

[13] Infinite auto reset

Select Infinite Automatic Reset [13] for

continuous resetting after tripping.

Parameters VLT HVAC Basic Drive Programming Guide

58 MG.18.B1.02 - VLT

is a registered Danfoss trademark

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