Single Phase Voltage Regulator RAV-2
with control CTR-2
Instruction Manual MI-010
Page: 9/27
Rev. 06/2017
7. With regulator on the neutral position, change the “Normal/ Turn off / External” switch of the control panel to
“Trun off” position;
8. Close disconnect blade of “L” side;
9. Open by pass disconnect blade;
10.Change the “Normal/ Turn off / External” switch of the control panel to “Normal” position;
11. Adjust the control for operation in automatic mode.
Note: With parameter 48 (HRAUT) adjusted in “1”, if CTR2 control keeps in manual mode for
more than 15 minutes without any button being pressed nor communications detected by its
Comm ports, regulator would change into automatic mode.
VERIFYING REGULATORS OPERATIONS
Observation: To avoid network being subject to voltage variations, tests listed hereafter are to
be done with LOAD bushing disconnected from network and “bypass” disconnect blade
closed.
1. Adjust control so as to operate in manual mode;
2. Press “Lower” button of control until voltage is out of the regulated voltage, which is identified by the LED “Raise”
lit;
3. Adjust the control so as to operate in automatic mode;
Note: Observe that, after some time, regulator will return to operation on regulated voltage
which will be identified by the LED “Raise” turning off
4. Adjust the control so as to operate in “Manual”;
5. Press “Raise” button of control until voltage is out of the regulated voltage, which is identified by the LED “Lower”
lit;
6. Adjust the control so as to operate in automatic mode;
Note: Observe that, after some time, regulator will return to operation on regulated voltage
which will be identified by the LED “Lower” turning off
REMOVING REGULATOR FROM SERVICE
DANGER: This procedure, when done without regulators being on neutral position, cause
short-circuit with severe damage risk for equipment, network and personnel
1. Press “Auto Zero” button so as to return tap changer to neutral position (when on neutral position the Neutral and
“Bypass” LEDs are lit and position indicator will show “0” in the control. If this elements are coherent
simultaneously the “Fail” LED will be off and screen will show (Tap changer in NEUTRAL Position. Ready for
operation.) message.
DANGER: Due to a risk of operation out of neutral position the auto zero, although automatic,
has to be monitored by the operator which needs to observe the sequence.
2. With regulator on the neutral position, change “Normal/ Turn off / External” switch of the control panel to “Turn
off” position;
3. Close the bypass disconnect blade;
4. Open the disconnect blade on “L”;
5. Open the disconnect blade on “S”;
6. Only in delta or byphase connection, open the disconnect blade on “SL”.
MAINTENANCE
Voltage regulator was designed so as to allow certain verifications without having to remove equipment from service.
Maintenance, when methodically done, is an essential factor to the durability of the voltage regulator in its best
performance and working conditions.
General Instructions
In table 2 some verification elements are described together with its periodicity and evaluation criteria.
ITB - Equipamentos Elétricos Ltda.
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