Trend NX Variable Speed Drives Instrukcja Użytkownika Pobierz pdf (Strona 18)

Installation on a Trend System

2.2.5 NX drive with duty/standby motors

This system drives 2 motors in duty/standby e.g. they are both mounted on a

common drive shaft.

The motors are controlled by a three position switch (Motor 1, Off, Motor 2).

If Motor 1 is selected, then closing the start contact will energise the C1 coil

which will connect terminals 6 and 8 together, and connect the output of the

drive to motor 1.

Since the C1 and C2 motor contacts are mechanically interlocked so that

closing one prevents the other from closing; closing C1 will stop C2 closing

and switch off motor 2.

In the Off position neither motor can operate.

Since the circuit is symmetrical, in the Motor 2 position, motor 2 is switched

on and motor 1 is switched off.

The local isolators (L1, L2) will isolate the appropriate motor.

Note that since the C1 and C2 contacts are in parallel across terminals 6 and

8, the motors can operate independently unlike example 1.2.4 above where

they can only operate together.

16 NX Variable Speed Drives Installation Manual TG200434 Issue 3/A 04/07/2006

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 135 136

Brak uwag

Trend NX Variable Speed Drives Instrukcja Użytkownika Strona 18