Single Phase Voltage Regulator RAV-2
with control CTR-2
Instruction Manual MI-010
Page: 4/27
Rev. 06/2017
Single phase between phase and earthed neutral
Features:
– Connections as per Figure 4;
– In this case the regulator´s nominal voltage is the nominal voltage between phase
and neutral of the supply;
– For a purely resistive load phase shift between voltage and current measured at the
regulator would be 0º (zero degrees);
– Regulation achieved is +/- 10% between phase and neutral;
– Current is measured only in phase.
Two phase
Features:
– Connection as per Figure 5;
– Regulator´s nominal voltage is the nominal voltage between phases of the supply;
– For a purely resistive load phase shift between current and voltage measured in the
regulator would be – 30º o + 30º depending on the phase sequence;
– Regulation: +/- 10% of voltage between phases;
– Current is measured only in one of both phases.
–
Open Delta
Features:
– Connection as per Figure 6;
– Regulator´s nominal voltage is nominal between phases
of supply;
– For a purely resistive load phase shift between current
and voltage measured in the regulator would be – 30º for
one regulator or + 30º on the other;
– Regulation: +/- 10% of voltage between phases for all
three phases;
– Current is measured only in two of the three phases.
Closed Delta
Features:
– Connections as per Figure
7;
– Regulator´s nominal voltage
is the nominal voltage
between phases of the
supply;
– For a purely resistive load
phase shift between current
and voltage measured in
the regulator would be – 30º
for all regulators;
– Regulation: +/- 15% of
phase-phase voltage for
direct power flow;
– Current is measured in all
three phases but there can be up to a 5.35% error depending on connections done in S or L terminals for the
reference tension to the other regulator from the bank;
– For regulators working in closed delta which can operate in inverse power flow, except on those cases where the
inverse power flow is caused by cogeneration, an external and independent Voltage Transformer is mandatory
with secondary connected to terminal 26 of terminal blocks on regulator and primary connected to terminal S of
regulator of reference phase. Reference phase is that where SL of the regulator is connected keeping same
phase sequence and polarity of connection for direct flow (more details on “voltage and reference” and item 47 of
table 7).
ITB - Equipamentos Elétricos Ltda.
Figure 5: Connection in two
phase lines.
S
S
o
u
r
c
e
SL
L
L
o
a
d
Phase A
S
o
u
r
c
e
Phase B
L
o
a
d
Figure 7: Delta connection of three single phase regulators in a three phase line.
L
L
o
a
d
Phase A
L
L
o
a
d
Phase B
S
S
o
u
r
c
e
SL
L
L
o
a
d
Phase C
S
S
o
u
r
c
e
SL
S
S
o
u
r
c
e
SL
Figure 6: Open delta connection of two single phase
regulators in a three phase line.
S
S
o
u
r
c
e
SL
L
L
o
a
d
Phase C
S
o
u
r
c
e
Phase B
L
o
a
d
S
S
o
u
r
c
e
SL
L
L
o
a
d
Phase A
S
o
u
r
c
e
Phase B
L
o
a
d
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