Schneider Electric ALTIVAR 58 TRX Przewodnik Instalacji Pobierz pdf (Strona 44)

Chapter 2—Menus VVDED397047USR6/03

3—Drive Menu 06/2003

Mot.CosPhi CoS

Motor CosPhi, motor power

factor.

Set the CoS parameter to the

motor nameplate power factor.

0.5 to 1

depends

on drive

controller

rating

If the power factor is not provided on the nameplate or to

optimize the motor torque performance, use

the following

procedure to optimize the motor power factor setting.

Operate the motor with no load at a frequency equal to

nominal frequency / 2. Then adjust the CoS parameter

such that the measured motor voltage equals nominal

motor voltage / 2.

For example:

For a 460 Vac motor operating at 60 Hz, adjust the CoS

parameter to have 230 V at 30 Hz.

If motor voltage is less than 230 V, decrease CoS

parameter.

If motor voltage is more than 230 V, increase the CoS

parameter.

Table 11: 3—Drive Menu Parameters (continued)

Parameter Code Description

Adjustment

Range

Factory

Setting

[1]

Depending on the position of the 50/60 Hz switch. Ensure that the switch setting

matches the input frequency (see page 14).

[2]

= drive controller constant torque output current rating shown on the drive controller

nameplate.

[3]

The factory setting depends on the macro-configuration used: No for Material

Handling, Yes for General Use and Variable torque.

[4]

This parameter is not available on 125–500 hp drive controllers.

[5]

Refer to the drive controller instruction bulletin, VVDED397048US, for duty cycle

ratings of the drive controllers.

★ These parameters are available only with the I/O extension card installed.

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 125 126

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