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Automatic operation (with Hand/Off/Auto switch only)
1. To start the motor in auto bypass, move the Hand/Off/Auto selector switch (SS2)
switch to the "Auto" position. To start the motor, close dry contacts wired between
terminals 1TB 9 and 10. This will start the motor across the line and run at 60hz.
2. Speed is not selectable in bypass mode. Motor will only run at full rated speed.
3. To stop the motor open the circuit in step 2 above.
Auto Transfer to Bypass Option
Some drive systems include the option for auto bypass as indicated by the presence
of the characters "+G311" in the type code and the presence of switch SS3 inside
the cabinet. This feature will allow the drive to automatically switch to bypass mode if
the drive stops due to a fault. (A fault will be indicated on the control panel and relay
output 3, RO3, will change from energized to deenergized.) When the fault is
cleared, the system will switch out of bypass mode. Typically, the drive will not restart
until a START command is received.
To enable auto bypass operation in the event of a fault, set switch SS3 (located
inside the drive cabinet) to the ON position. The setting of this switch should only be
changed when the motor and drive system are OFF and the circuit breaker
disconnect is in the OFF position. If this is followed, changing SS3 to ON will not
initiate motion of the motor.
Electronic and Bimetallic Overload
Some drive systems include a Type EF (EF370-380, for example) electronic motor
overload relay. This device is only used during bypass operation. The electronic
overload relay allows the user to select an overload class, either class 10, class 20
or class 30. For drives that require high starting torque, class 20 is recommended.
Otherwise, class 10 is suitable.
Electronic overload relays are included when characters "+G418" are shown in the
type code and on all drives with frame size R8 or R9.
All other drives include the Type TF (e.g. TF42-7.6) or TA (e.g. TA200DU150)
bimetallic motor overload relay. This is a class 10 relay; the class rating is not
adjustable.
Both types of overload relays are three pole relays with thermal tripping sensors.
They are manually or automatically resettable. The device is manually reset by
pushing the blue button on the relay. Manually resetting the relay requires turning the
circuit breaker off and opening the cabinet door to access the relay. In auto reset,
after the motor overload cools, it will reset, its fault contact will close allowing the
motor to restart in bypass automatically. For additional information, go to
library.abb.com
TF200DU or EF370) followed by "instructions".
See the table in
type code.
ACS580-0P with Bypass
and search for the first few characters of your relay (e.g. TA42,
Appendix A - Overload Relays
Supplemental Installation Manual for ACS580-0P
for a list of overload relays by drive
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