Single Phase Voltage Regulator RAV-2
with control CTR-2
Instruction Manual MI-010
Page: 13/27
Rev. 06/2017
accesed through its incorporated communication ports.
The CTR -2 electronic control possesses the following basic features:
Measurements of line electrical parameters;
The control is located inside a metal box with IP54 protection .
Has a power switch with three positions "Normal / disconnected / external”, which selects the way to power up
control , and prevents energization of main bushings when supplied through an external power supply ;
Terminal for external power supply;
Terminal for voltmeter connection;
Automatic current transformer short circuit when the panel is opened or removed the CTR- 2 from cabinet
Tap changer operations digital partial counter;
Digital total operations counter switch;
Led indicator of neutral position independent of position indication;
Led indicator need to boost voltage ;
Led indicator need to buck voltage ;
Led fault ;
Led confirmation neutral position ;
Protection fuse and motor control fuse;
Data Acquisition
1. Acquires, stores and shows date and time of last minimum voltage and current demand;
2. Acquires, stores and shows amount of registers in adjustable periods between 1 and 60 minutes, instantaneous
voltage, current, power factor, actual tap changer position, date and time of each register until total amount of
registers is 9362. From that point onwards, a new record is stored over the oldest log.
Note: This stack is only accessible with the aid of a computer connected to the control in
which the program ITBComm3 is installed.
Work on direct or inverse power flow without the need of a special external voltage transformer, except when in
closed delta connection in which inverse flow is determined by infinite busbar. (more details in “connection
possibilities delta”, “reference voltage” and ítem 47 of table 7).
“Auto Zero” function which leads on load tap changer from
any position to zero position (neutral)
Simultaneous communication ports:
1. Allow communication through EIA232, EIA485, USB, optic fiber
and (optional) ethernet;
2. Serial communication with a computer can be made by any of
the comm ports using DNP3, DNP3 LAN / WAN or ITBComm3
communication program (available for download and
installation at http://www.itb .ind.br/ITBSetup3.exe) running on
Windows 98 or superior, and a connection media between the
computer comm port and CTR2. CTR2 control has on the front
one USB type A, and one RS232, through a DB9 connector. Has internal optical comm port (connector ST), R
S232 (DB9) and RS 485. In case of serial communication DB9 cable pinout to be used is as shown in Figure 13.
Communication ports can also be used for communication via modem by selecting in the communication
program ITBComm3 a COM port where modem is connected and that a correctly configured modem is placed in
the control;
Pine 9 of each DB-9 is active with +5 Vdc;
ITB - Equipamentos Elétricos Ltda.
Figure 13: Diagram of the serial communication cable.
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