DTR
Transformer Tap Changer Controller
Automatic voltage regulation,
analysis, and control functions for
transformer applications.
Applications
Monitoring and Metering
■
Control power transformer OLTCs to
regulate voltage
■
I, V, P, Q, cos j, frequency measurement
■
Transformer OLTC position
Integrated Systems
■
Event recording
■
Counter of the tap position increases and
decreases for rise and lower operations of tap
changer
■
Protection and Control
■
Automatic voltage regulator
■
Automatic/manual operation
User Interfaces
■
Three setting tables
■
■
Configurable inputs and outputs
Rear communication port (plastic or glass
fiber optic, RS232 or RS485)
■
BCD format inputs to detect tap changer
position
■
RS232 port, faceplate accessible
■
GE-NESIS Windows® based programming
software
■
Mimic for increasing/decreasing commands
and tap displaying
■
Graphic display and keypad
■
ModBus®, M-Link, and M-Link Plus
communications protocols
■
DDS system compatible
■
Control pulse outputs
GE Multilin
1
DTR Transformer Tap Changer Controller
DESCRIPTION
CONTROL
The transformer tap changer
controller DTR controls automatically
the transformer on load tap changer,
so that the power supply voltage is
practically constant, independently
from the load. In order to achieve this,
the DTR is able to increase and
decrease the OLTC in the power transformer.
Operation
The DTR can be applied to any
existing tap changer, as its settings
and operation ranges, as well as its
inputs and outputs, are fully
compatible with all the OLTC available in the market.
The DTR has been designed using
the same hardware architecture as
the DDS protection and control
system. This means that, besides
being a powerful individual
element, the DTR is completely
compatible with the system, and
can be fully integrated in a substation.
The DTR also provides analysis and
control functions, such as event
recording. The internal memory
allows storing up to 165 events. It
also includes measuring functions
for I, V, frequency, etc.
As all the units part of the DDS
family, the DTR provides easily
configurable inputs and outputs.
The user can program these inputs
and outputs by means of userfriendly software programs, part of
GE-NESIS (GE-INTRO, GE-LOCAL).
This software package is Windows®
based and it is the same for all the
DDS family.
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The DTR is used to maintain a
constant voltage level at feeders
busbar. The unit gives commands
to increase and decrease the transformer OLTC. As these differences
in the tap position are usually
discrete, the DTR allows the user to
set the percentage of change
between taps. In addition, a time
delay is provided by setting, to
allow matching the OLTC time
required to change from one tap to
the closest next.
Automatic/Manual Operation
Using one of the configurable digital inputs, the DTR can receive an
order for automatic or manual
operation. Manual operation has
priority over automatic, in order to
avoid performance failures in the
case of manual operations. This
command can also be sent to the
unit by means of the communications software, or the MMI.
MONITORING
AND METERING
Measures
The voltage regulator DTR displays
instantaneous values of I, V, P and
Q (three-phase), frequency and cos
ϕ values.
Event Recorder
165 events are recorded in nonvolatile EEPROM memory. Date
and time (1 ms resolution), type of
event, voltage and current, and a
relay status snapshot are stored.
Digital Inputs and Outputs
The DTR system has 42 digital
inputs and 22 outputs. These I/Os
can be configured by the user by
means of GE-INTRO configuration
software.
Blockings
The transformer tap changer
controller DTR blocks its operation
in case that voltage falls below
user defined limits, (undervoltage
blocking), and also when voltage or
current exceeds another user
defined limit (overvoltage or overcurrent blocking).
Settings
The unit provides three setting
tables. The user can move from one
table to another using a digital
input or through communications.
This feature allows the use of
different settings in different
system situations to better maintain the actual system needs of
security, etc.
www.GEindustrial.com/Multilin
DTR Transformer Tap Changer Controller
Typical Wiring
B4
I1
A1
I5
A2
I5
A7
V
A8
V
N1
O1
N2
02
N3
O3
N4
O4
GE Power Management
DTR
Automatic Voltage Regulator
I1
I2
TAP 1 (BCD)
TAP 2 (BCD)
I3
I4
I5
I6
TAP 3 (BCD)
TAP 4 (BCD)
TAP 5 (BCD)
TAP 6 (BCD)
INCREASE
COMMAND
O1
DECREASE
COMMAND
O2
AUTOMATIC
O3
MANUAL
O4
I7
STOP
COMMON
I10
I11
I12
I13
INTERLOCKING 2
SYSTEM READY
PROGRAMMABLE OUTPUTS
INTERLOCKING 1
REGULATOR ALARM
INPUTS 2
I8
I9
I14
COMMON
I15
I16
INPUTS 3
I17
I18
I19
I20
I21
COMMON
I22
I23
INPUTS 4
I24
I25
I26
I27
I28
COMMON
I29
I30
I31
I32
INCREASE
DECREASE
AUTOMATIC
MANUAL
I33
I34
I35
STOP
COMMON
I36
I37
TABLE 1
TABLE 2
I38
I39
INPUTS 5
J9
K9
J10
K10
J11
K11
J12
K12
L1
M1
L2
M2
L3
M3
L4
M4
g
O5
O6
STOP
COMMAND
O7
COMMAND NOT
EXECUTED
O8
IRREGULAR
TAP CHANGE
O9
UNDERVOLTAGE
O10
OVERVOLTAGE
O11
OVERCURRENT
O12
LOCAL
O13
REMOTE
O14
SUCCESSIVE
OPERATIONS
O15
EXCESSIVE
OPERATIONS
O16
BCD 1 TAP
O17
BCD 2 TAP
O18
BCD 3 TAP
O19
BCD 4 TAP
O20
BCD 5 TAP
O21
BCD 6 TAP
O22
Q5
P5
Q6
P6
Q7
P7
Q8
P8
Q9
P9
Q10
P10
L5
M5
L6
M6
L7
M7
L8
M8
L9
M9
5
L10
M10
L11
M11
L12
M12
N5
O5
N6
O6
N7
O7
N8
O8
N9
O9
N10
O10
N11
O11
N12
O12
RTU INPUTS
J1
K1
J2
K2
J3
K3
J4
K4
J5
K5
J6
K6
J7
K7
J8
K8
G A12
CONTROL
POWER
INPUTS 6
P1
Q1
P2
Q2
P3
Q3
P4
Q4
D11 C11 Q11 P11
INPUTS 1
I1
VOLTAGE
B3
CURRENT INPUTS
CONTROL
POWER
SUPPLY
I40
I41
I42
COMMON
EN DTR CON.cdr
www.GEindustrial.com/Multilin
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DTR Transformer Tap Changer Controller
Technical Specifications Ordering
METERING
Frequency:
Nominal Phase Current:
Nominal Voltage:
Auxiliary Voltage:
50/60 Hz
1 or 5 A
100/√3 - 220/√3 VAC
48-125 VDC, ±20%
110-250 VDC, ±20%
COMMUNICATIONS
Local Communication: LCD alphanumeric display with
two lines of 16 characters per line;
20 button frontal keypad
Remote Communication
(local or remote PC and communications net):
Mode:
half duplex
Speed:
1,200 to 115,000 bps
Physical media:
RS232 (ports 1 and 2)
RS485 (port 2 optional)
Plastic Fiber Optic (port 2 optional):
Type of connector: HFBR-4516
Power supplied: 8 dBm
Receptor’s sensitivity: -39 dBm
Wave length: 660 nm
Glass Fiber Optic (port 2 optional)
Type of connector: STA
Power supplied: 17.5 dBm
Receptor’s sensitivity: -24.5 dBm
Wave length: 820 nm
Synchronization:
IRIG-B
• DB9 connector for RS232 ports on the front (1) and on the
rear (2).
• DB9 connector for RS232 port on the rear (3), with 1 mm
plastic fiber optic or 50/125 glass fiber optic option.
INPUTS
THERMAL CAPACITY
Current Circuits:
Continuously:
During 3 Sec:
During 1 Sec:
Voltage Circuits:
Continuously:
During 1 Min:
BURDENS
Current Circuits:
DTR 1 * 0 * * 000 * 00 A
DTR
0
1
2
3
0
2
M
D
G
H
Automatic Voltage Regulator
RS232 communications interface
Plastic fiber optic + RS232 communications interface
Glass fiber optic + RS232 communications interface
RS485 communications interface
P1, P2: M-Link protocol
P1: M-Link protocol; P2: ModBus® RTU protocol
Spanish language
English language
48 - 125 VDC auxiliary voltage
110 - 250 VDC auxiliary voltage
4 x In
50 x In
100 x In
2 x Vn
3,5 x Vn
0.5 VA for In = 5 A
0.1 VA for In = 1A
0.2 VA, Vn= 63.5 V
Voltage Circuits:
DC Burden:
During Operation:
Per Each Activated Input:
12 W
8 mA / 1 W, Vaux: 125 VDC
OUTPUTS
TRIPPING CONTACTS
Contact Capacity:
Maximum Operating Voltage:
Continuous Current:
Make and Carry:
Breaking:
440 VAC
16 A
30 A
4000 VA
ENVIRONMENTAL
Temperature:
Storage:
-40 to +85°C
Operation:
-20 to +70°C
Humidity:
Up to 95% without condensing
MECHANICAL CHARACTERISTICS
• Metallic package in 19” rack and 4 units high.
• Frontal HMI with LCD display and keypad.
• Protection class IP52 (according to IEC 529)
TYPE TESTS
Isolation Test Voltage:
Surge Test Voltage:
Interference:
Electrostatic Discharge:
Radiointerference:
Fast Transient:
Sinusoidal Vibration:
Shock:
Radiofrequency Emission:
2 kV, 50/60 Hz, 1 min
5 kV peak, 0.5 J
Class III according to CEI 255-22-1
Class IV according to CEI 255-22 2
Class III according to CEI 255-22-3
Class IV according to CEI 255-22-4
Class II according to CEI 255-21-1
Class I according to CEI-22521-2
according to CEI 41B (Sec) 81
and EN55022 class B
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PACKAGING
Dimensions:
H 7.3" x W 19.0" x D 9.1"
(185 mm x 484 mm x 231 mm)
Weight:
Not Packaged: 13.2 lbs (6 kg)
Packaged:
15.4 lbs (7 kg)
APPROVALS
Compliant
UL - UL listed for USA and Canada
*Specifications subject to change without notice.
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www.GEindustrial.com/Multilin