ABB TCC300, User Manual, Page: 332 / 716

6.2 Configuration
6.2.1 User programmable alarm relay
The User Programmable Alarm Relay (Form c) is a non
‑
latching relay that is capable of
switching 6 A at 125 Vac or 0.2 A at 125 Vdc and is user-programmable to indicate one
or more of the following conditions:
• Block Comm is in effect
• Block-Raise Voltage Limit exceeded
• Block-Lower Voltage Limit exceeded
• Voltage Reduction of any step is invoked
• Reverse Power Flow condition is detected
• Line Current Limit/Limit exceeded
• Tap Block Raise/Lower is in effect
• LDC_LDZ is in effect
• Abnormal Tap position detected
• VAr Bias Lead Limit Exceeded
• VAr Bias Lag Limit Exceeded
• Backup Power Fail (If purchased)
• RTN Fail to Operate
• Individual Tap Wear Limit Exceeded
• Operations Count Limit Exceeded
• Tap Changer Failure
When activated, the LDC/LDZ programmable alarm will initiate when any non-zero
setting has been entered as LDC Fwd resistance or reactance, or LDC-Z. It will also alarm
when any non-zero setting has been entered as LDC Rev resistance or reactance with the
"Rev Power Oper" configuration set to "Regulate in Reverse" and the control in reverse
power mode.
The Alarm Relay will de-energize and generate an output without any of the conditions
being enabled when power to the unit is lost.
6.2.1.1 Setting programmable alarm relay inputs from TCC600
1. Select Setup/Alarms from the TCC600 toolbar. TCC600 will display the Alarms
dialog screen.
Section 6
1VAC388793-MB A
Configuration
326 TCC300
User Manual