Installation And Connections; Installation Notes - Toshiba H7 Operation Manuals

Installation and Connections

The H7 True Torque Control
simple configuration settings. To operate properly, the ASD must be securely mounted and connected to
a power source (3-phase AC input at the L1/R, L2/S, and L3/T terminals). The control terminals of the
H7 may be used by connecting the terminals of the Control Terminal Strip to the proper sensors or
signal input sources (see the section titled
Note: The optional ASD-Multicom boards may be used to expand the functionality of the
ASD. See the section titled
the available options.
The output terminals of the ASD (T1/U, T2/V, and T3/W) must be connected to the motor that is to be
controlled (see
Upon initial system powerup, the Startup Wizard starts automatically. The Startup Wizard assists the
user with the initial configuration of the H7 True Torque Control
section titled Initial Setup on pg. 25
As a minimum, the installation of the ASD shall conform to Article 110 of the 2002 NEC, the
Occupational Safety and Health Administration requirements, and to any other local and regional
industry codes and standards.

Installation Notes

When a brake-equipped motor is connected to the ASD, it is possible that the brake may not release at
startup because of insufficient voltage. To avoid this, Do Not connect the brake or the brake contactor to
the output of the ASD.
If an output contactor is used for bypass operation, it must be interlocked such that commercial power is
never applied to the output terminals of the ASD (T1/U, T2/V, or T3/W).
If a secondary magnetic contactor (MC) is used between the output of the ASD and the motor, it should
be interlocked such that the ST – CC terminals are disconnected before the output contactor is opened.
Do Not open and then close a secondary magnetic contactor between the ASD and the motor unless the
ASD is off and the motor is not rotating.
Note: Re-application of power via a secondary contact while the ASD is on or while the
motor is still turning may cause ASD damage.
On some devices the ST-to-CC connection is further enhanced by the operation of the MS1 AUX relay
circuit. The MS1 AUX relay circuit is normally open and closes the ST-to-CC connection only after
normal system power is available. The MS1 AUX relay circuit prohibits the ST-to-CC connection in
the event that the MS1 contactor fails to close during start up or if MS1opens while the ASD is running.
For the 230 volt ASD this feature is available on the 30 HP system, on the 460 volt ASD this feature is
available on the 50 HP and above systems, and on the 600 volt ASD it is available on the 60 HP and
above systems.
Figure 1. MS1 AUX Circuit Configuration (ST1 to CC).
6
2
Adjustable Speed Drive may be set up initially by performing a few
I/O and Control on pg.
H7 Optional Devices on pg. 210
Figure 17 on pg. 18).
for additional information on the Startup Wizard.
11).
for further information on
2
Adjustable Speed Drive. See the
H7 ASD Operation Manual