NORD BU6200 User Manual

OPERATING INSTRUCTIONS

NORDAC connect

Getriebebau NORD

GmbH & Co. KG

BU 6200 GB

NORDAC connect Operating Instructions

1 General

NORDAC connect is a device that will switch ON or OFF one phase sequence in motors with ratings between

0.25 and 3.0 kW. Integrated in the terminal box of the motor, it ensures complete motor protection as well. With
NORDAC connect, no extra components need to be provided in the switch cabinet with which to wire up the
drive or to monitor its working. This is what makes NORDAC connect the perfect switchgear for many a drive
which is operated on an autonomous basis, ensuring both effective control and absolute operational safety.

1.1 Instructions for safety and installation

Three-phase motors with a NORDAC connect motor switch are operational equipment for use in industrial
power plant and are operated at voltages which on contact may cause serious injuries or even death.

CAUTION! DANGER!

WARNING

THESE DEVICES MUST BE EARTHED.
For the device to be operated safely, installation and initial start-up must be performed by qualified

personnel in a workmanlike manner, with all of the directions mentioned in the present Operating
Instructions being followed as specified.

In particular both the generally and locally applicable installation and safety regulations for any work on
power installations (e.g. VDE) and the regulations concerning the professional use of tools and the use of
any equipment for personal protection must be observed

The mains input terminals may be dangerously live even after the motor has stopped (e.g. as a result of an
electronic signal disabling the [RUN] condition, or following a jamming of the drive). The motor being at rest
does not mean that it is also electrically isolated from the mains.
Always use insulated screwdrivers in the terminal areas concerned.

Make sure that the source of input voltage is disconnected before you establish connections to
the unit or change them.

Touching exposed or unconnected terminals may lead to serious injuries or even death!

European EMC Directive

If the instructions of the present manual regarding installation of the NORDAC connect switchgear are duly
followed, the device will meet all of the EMC requirements defined in the applicable directive in accordance with
the EN61800-3 product standard for motor-driven systems.

2 And this is how it works

• The NORDAC connect contains a power switch which, by providing a 24 V DC control signal [RUN], will
cause the permanently applied voltage to be fed to the motor windings.

• At the same time, if there is a mechanical brake, it is lifted automatically via the integrated brake rectifier.
The drive starts to run.
When the control signal is removed, the power supply to the motor windings is cut off as well, and the
mechanical brake takes hold again.

• All the time the drive is in operation the motor temperature is monitored by a thermal relay. In the event of a
temperature fault, the NORDAC connect will automatically switch off the drive and transmit a fault signal to
the master control system ( the [OK] signal changing to low ).

• A reversal of the phase sequence is obtained by way of exchanging two input phases.

2 BU 6200/00 GB