Single Phase Voltage Regulator RAV-2
with control CTR-2
Instruction Manual MI-010
Page: 27/27
Rev. 06/2017
Note: The possibility of negative values for "Ux - V" happen when a capacitor bank is mounted
downstream the regulator and the possibility of negative values for "Ur-V" was kept so you
can set the phase shift between current and tension calculated keeping the "Def" function in
CTR-2 control to "0". We recall that the definition of lag implies incorrect indication of power
factor a, therefore, preferable to use the "Set" function.
INDICATOR IRT-1 (OPTIONAL)
The digital indicator of positions for ITB single-phase step voltage regulator, IRT-1
model, is a microcontrolled device that allows to obtain the position information of the
tap changer in real time, through an absolut encoder with 5bits of resolution. It has a
display capable of simultaneosly indicate, and visible from the ground, the current
position, maximum and minimum reached during regulator operation.
Features such as the absence of moving parts, lack of flexible shafts, untying of the
blocking function of the extreme positions and the needlessness to adjust or
calibrate, ensure a greater reliability and availability of information. The digital IRT-1
indicator of positions is allocated in a steel cabinet that offers ideal protection to your
operation.
The IRT-1 indicator has two power supplies, one is from the electrical network and the
other comes from a no-break system, with the ability to indicate the positions within 5
days after de-energized.
The no-break system comprises a set of 4 rechargeable batteries (1,2V/ 900mAh) AAA size, connected in series.
The average battery durability is approximately two years.
It´s not recommend the disposal of batteries in the trash. After use, these items should be
disposed of properly, at the risk of occasioning damage to the environment and human health.
ALTERNATIVE DRIVE
Only if formally and expressly required by the customer, through specification and purchase order, the regulator will
have at the bottom of the control box, to allow regulator to change tap position without CTR-2 control.
It will be a pulsed three way switch normally disconnected which connects the motor in the boost direction when the
lever is in the upper position and to buck when in lower position.
DANGER: As CTR-2 has the position indication function, the usage of alternative switch
eliminates the actual tap changer position indication and electrical lock of extreme position,
leaving only mechanical lock. The need of redundant lock is needed as, in case of failure,
energized regulators may explode
The usage and availability of this is not recommended
DANGER: Usage of this switch is to be done carefully as inside the control box several points
have dangerous tensions and changes of tap changer position is done without knowledge of
actual position, not having a secure method to know mechanical block has actuated.
INSOLATING OIL –FISPQ
Regulators, as many electrical high voltage devices, have an active inmersed in insulating and cooling mineral oil.
Therefore, they are mounted in sealed tanks with pressure relief devices. In operation, these oils can reach high
temperatures and also the ambient temperature is a polluter and aggressive agent. We recommend reading the
Information Sheet Product Safety Chemical MSDS which contains all necessary information for safe handling,
proper disposal, associated risks and actions to make in case of accidents.
1
LIFE CYCLE
ITB Equipamentos Elétricos Ltda undertakes to receive and dispose properly the equipment produced when it is
considered unusable in accordance with the current legislation.
1 These instructions do not intend to cover all details and possibilities of application, installation, operation or maintenance of the single phase voltage regulators.
2 ITB is at your service for further clarification and additional information and reserves the right to promote revisions without prior notification.
ITB - Equipamentos Elétricos Ltda.
Figure 21: IRT-1.
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