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Table of Contents

1. How do I Select The Correct Brake Resistor ?
2. Which Inverter Should I Use ?
3. How Do I Make The Potentiometer Work ?
4. Which Mode Should I Use ?
5. How Do I Make The Inverter Power Up In Remote ?
6. Where are the rest of the Parameters ?
7. How Much Heat Does An Inverter Generate in the Panel ?
8. How Much Space Do I Need In My Control Panel ?
9. What are Harmonics & What can I do about them ?

How do I Select The Correct Brake Resistor ?

Use the following link to brake resistor sizing tables:

Sizing Dynamic Brake Resistors

For information on installation:

Installing Dynamic Brake Resistors

To check compatibility between resistors, drives, & brake controllers:

GEPC VAT2000 Compatibility Chart

Meiden VT230S Compatibility Chart

To Select a Brake Resistor for a GE VAT20 Drive :

VAT 20 Brake Resistors

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Which Inverter Should I Use ?

Follow the link to our Drive Selector

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How Do I Make The Potentiometer Work ?

With VT230 & VAT2000 the potentiometer is enabled by default when the inverter is in remote mode
If it is not working check that parameter C04-1 is set to it's default value of 16

With VAT20 set F11 to 1

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Which Mode Should I Use ?

The VT230 & VAT2000 have 5 modes:

1/    V/F For Constant Torque

This is used for most applications, where the high dynamic response or speed accuracy
is not required.

2/    V/F For Variable Torque

This mode is specifically for centrifugal fans & pumps, where the power required is proportional to the speed cubed. This means that the motor can be started without excessive overload occurring.

This mode allow the drive to be re-rated to the nest size up
e.g. A 4kw Drive will run a 5.5kW motor.

3/    Open Loop Vector

For more dynamic applications or where torque control( or limit ) is required.
Provides Vector control without encoder feedback.

The motor must be auto tuned for this mode to perform

4/    Closed Loop Vector

To increase speed accuracy & permit torque at zero speed, this mode Provides Vector control with encoder feedback (an optional PCB is required to connect the encoder).

The motor must be auto tuned for this mode to perform

5/    Permanent Magnet Motor Control

This mode is specifically for the operation of permanent magnet motors, encoder feedback is required (an optional PCB is required to connect the encoder).

To select the correct mode set C30-0 to the appropriated number.

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How Do I Make The Inverter Power Up In Remote ?

With VT230 & VAT2000 set C11-0 to 2

With VAT20 set F10 to 1

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Where are the rest of the parameters ?

With VT230 & VAT2000 some groups of parameters are hidden by default

to unlock all parameters set the following:

A05-0 = 1
A05-1 = 1
A05-2 = 1

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How Much Heat Does An Inverter Generate in the Panel ?

All inverters generate heat, follow this link to find out typical values for Meiden & GE Inverters:

Heat Loss

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How Much Space Do I Need In My Control Panel ?

There are 2 things to consider here, first the physical size of the unit & second the clearance needed around it for air circulation.

Click here to View Clearances Required

Follow the following links to see dimensional drawings:

Meiden VT230S Dimensions
GE VAT20 Dimensions
GE VAT2000 Dimensions

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What are Harmonics & What can I do about them ?

Click hear to view / download the Harmonics Bulletin

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Copyright © 2004  [MLH Services]. All rights reserved.
Revised: mars 30, 2004 .

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