Danfoss VLT 6000 (Legacy Product) User guide

VLT 6000 (Legacy Product)

Brand: Danfoss

Model: VLT 6000 (Legacy Product)

Type: User guide

This manual is also suitable for

VLT® 5000/6000

Danfoss VLT 6000 (Legacy Product) is a compact and versatile frequency converter with a wide range of features and functions. It is ideal for a variety of applications, including pumps, fans, compressors, and conveyors. The VLT 6000 is easy to install and operate, and it offers a variety of control options, including local control, remote control, and fieldbus communication. With its robust design and advanced features, the VLT 6000 is a reliable and efficient choice for a wide range of industrial applications.

Danfoss VLT 6000 (Legacy Product) is a compact and versatile frequency converter with a wide range of features and functions. It is ideal for a variety of applications, including pumps, fans, compressors, and conveyors. The VLT 6000 is easy to install and operate, and it offers a variety of control options, including local control, remote control, and fieldbus communication. With its robust design and advanced features, the VLT 6000 is a reliable and efficient choice for a wide range of industrial applications.

1

MN.56.A1.02 - VLT is a registered Danfoss trade mark

Multi motor application with VLT

®

5000 and VLT

®

6000

■■

■■

■ Connecting more than one motor

When connecting more than one motor to a VLT, the

question rises? How shall I protect the motors and

cables against overload?

A common practice is to mount a MCCB (moulded

case circuit breaker) in front of each motor. It is

however not a reliable solution. The MCCB can be

overheated by the high harmonics in the PWM switch

pattern. Therefore there are no manufactures of

MCCB’s who will support this type of application. A

simple and cheap solution is to use a Thermal overload

relays like TI X (Danfoss) or motor starter as CI+TI or

CIM XX (Danfoss).

Fig. 1 is an application with two motors, protected

with TI X overload relays. It works in the following way:

When one of the overload relays F2 or F3 opens, the

VLT stops. Both the overload relay and the VLT offer

many possibilities for stop and restart, this is not a

subject in this note. If it is inconvenient that all the

motors are stopped, when one is overloaded, a motor

starter is an alternative solution.

The cable squares can be selected after the following

rules:

Cable “a” is short circuit and overload protected by F1.

Cable “b” is short circuit and overload protected by

the VLT. The cable is to be expected to be loaded with

the maximal continuous output current from the VLT

or the sum of the setting of F2 and F3. A good hint is

to use the same square as “a”.

Cable “c” is overload protected by F2 or F3. The VLT

and F1 are the short circuit protection.

Please remember that the leads between terminal 12,

27, 98 and 95 are on PELV level. For EMC/I they must

be in a separate cable or conduit.

In applications where cable ”b” is less than 20 m and

cable “c” is more than 20 m, the setting of F2 and F3

has to be increased with 0,5 A. The reason is, that the

capacitive current is flowing, which increases the

current through F2 and F3 with 0,5 A.

Fig. 1

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Danfoss VLT 6000 (Legacy Product) User guide

VLT 6000 (Legacy Product)

Brand: Danfoss

Model: VLT 6000 (Legacy Product)

Type: User guide

This manual is also suitable for

VLT® 5000/6000

Danfoss VLT 6000 (Legacy Product) is a compact and versatile frequency converter with a wide range of features and functions. It is ideal for a variety of applications, including pumps, fans, compressors, and conveyors. The VLT 6000 is easy to install and operate, and it offers a variety of control options, including local control, remote control, and fieldbus communication. With its robust design and advanced features, the VLT 6000 is a reliable and efficient choice for a wide range of industrial applications.

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