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SECTION 5 OPTIONAL FEATURES
5 --- 1
MOTOR LOAD TRANSFER
Inphase monitoring logic controls transfer and retransfer
of motor loads, so that i nrush currents do not exceed
normal starting currents. It avoids nuisance tripping of
circuit breakers and mechanical damage to motor
couplings.
The Motor Load Transfer feature is built into the
controller. DIP switch S1 (actuator 5) activates this
feature: right = ON, left = OFF.
FUNCTION S1 DIP SWITCH
enable Actuator 5 on
5
disable Actuator 5 off
5
Shaded DIP switches are standard factory settings.
If the Motor Load Transfer feature is enabled,
it will be activated following
the Load
Disconnect Feature Delay Before Transfer
delay. Also, the transfer switch may not
operate immediately after the t ransfer control
switch is operated, e ven if both sources are
available. This delay is intentional introduced
if the two power sources are not inphase.
Depending on the frequency difference, it may
take a few seconds for the sources to reach
synchronism.
Note
LOAD DISCONNECT FEATURE
Connect external circuits to the terminals indicated on
the Wiring Diagram in the back of this manual.
The double throw (Form C) contact is rated for 28 VDC
or 120VAC (6 amps resistive). The contact operates prior
to a selectable 0, 3, 10, or 20 second delay before transfer
of the Non-Automatic Transfer Switch. The contact
resets either immediately following transfer or after the
same
delay as set for pre---signal before transfer.
Time delay between the load disconnect control signal
and initiation of transfer is set on the controller with DIP
switch S2 (actuators 6, 7, 8) as shown below:
Delay Before Transfer
LD TDBT S2 DIP SWITCH
0 (disable)
Actuator 7 on
Actuator 8 on
87
3seconds
Actuator 7 on
Actuator 8 off
87
10 seconds
Actuator 7 off
Actuator 8 on
87
20 seconds
Actuator 7 off
Actuator 8 off
87
Shaded DIP switches are standard factory settings.
Delay After Transfer*
LD TDAT S2 DIP SWITCH
enable Actuator 6 on
6
disable Actuator 6 off
6
*Enabling the Delay After Transfer will cause the control
signal to reset after the same delay
as set for the Delay
Before Transfer.