ABB TCC300, User Manual, Page: 624 / 716

Reduction Step 1 %
2.5
Voltage reduction can be achieved by contact or communication methods. First of three
independent steps of voltage reduction adjustable from 0% to 10% in 0.1% increments of
the bandcenter setpoint. Factory setting is 2.5%.
Reduction Step 2 %
5.0
Voltage reduction can be achieved by contact or communication methods. Second voltage
reduction step. Factory setting is 5.0%.
Reduction Step 3 %
7.5
Voltage reduction can be achieved by contact or communication methods. Third voltage
reduction step. Factory setting is 7.5%.
10.2.2.6 Limits
Block Raise Voltage
XXX.X Volts
Overvoltage limit is adjustable from 95.0 V to 135.0 V in 0.1 V increments with a factory
setting of 128.0 V. The Block Raise setpoint should always be set above the Block Lower
setpoint and above the upper band limit (the bandcenter plus one-half of the bandwidth)
for the control to operate. All automatic Raise/Lower tap operations are blocked, when
input voltage is less than 85.0 Vdc.
Runback DeadBand
X.X Volts
Runback Deadband is adjustable from 1.0 V to 4.0 V in 0.1 V increments with a factory
setting of 2.0 V.
Block Lower Voltage
XXX.X Volts
Undervoltage limit is adjustable from 95.0 V to 135.0 V in 0.1 V increments with a factory
setting of 114.0 V. The Block Lower setpoint should always be set below the Block Raise
setpoint and below the lower band limit (the bandcenter minus one-half of the bandwidth)
Section 10
1VAC388793-MB A
Appendix A HMI
618 TCC300
User Manual