Toshiba Adjustable Speed Drive H3 - Manual (Page 12)

TOSHIBA
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Operating Safety Precautions (cont'd)
8) Interface problems can occur when this drive is used in conjunction with
some types of process controllers. Signal isolation may be required to
prevent controller and/or drive malfunction (contact Toshiba or the process
controller manufacturer for additional information about compatibility and
signal isolation).
9) Do not open and then re-close a secondary magnetic contactor (MC) between
the drive and the load unless the drive is OFF (output frequency has
dropped to zero) and the motor is not rotating. Abrupt re-application of the
load while drive is on or while motor is rotating can cause drive damage.
10) Use caution when setting output frequency. Overspeeding a motor can decrease its
torque-developing ability and can result in damage to the motor and/or driven
equipment.
11) Use caution when setting the acceleration and deceleration time. Unnecessarily
short times can cause tripping of the drive and mechanical stress to loads.
12) Only qualified personnel should have access to the adjustments and
operation of this equipment. They should be familiar with the drive operating
instructions and with the machinery being driven.
13) Only properly trained and qualified personnel should be allowed to service
this equipment. See page iii.
14) Follow all warnings and precautions. Do not exceed equipment ratings.
Confirmation of Wiring
Make the following final checks before applying power to the unit:
1) Confirm that source power is connected to terminals L1, L2, L3 (R, S, T).
Connection of incoming source power to any other terminals will damage
the drive.
2) The 3-phase source power should be within the correct voltage and frequency
tolerances.
3) The motor leads must be connected to terminals T1, T2, T3 (U, V, W).
4) Make sure there are no short circuits or inadvertent grounds and tighten any
loose connector terminal screws.
CAUTION
CAUTION