Instrumentation, Controls & Electrical
High-Speed Busbar Transfer System
Compact Solution
Using SIPROTEC 7SJ647
SPPA-E3000 Unit Protection & Synchronization
Compact High-Speed Busbar Transfer System
Using SIPROTEC 7SJ647
enables interruption-free transfer between the
independent incoming feeders of medium
voltage switchgear. This ensures a continuous
energy supply for the auxiliary section of power
plants and important industrial plants and
thereby safe functioning of the plant.
Functions
Three different configurations are possible:
■ Two incoming feeders on a Busbar
(principle 1 of 2)
■ Two incoming feeders and a sectionalizer
(principle 2 of 3)
■ Three incoming feeders on a Busbar
(principle 1 of 3)
The following transfer modes are possible:
■ Parallel transfer (sequential switching)
Benefits at a Glance
■ Low investment and operating costs
■ Compact dimensions – can be installed
directly in the medium-voltage switchgear
■ Simple wiring and engineering –
no additional components required
■ Fast installation and commissioning –
can be installed, wired and supplied with
the switchgear
■ Easy parameterization and operation –
using the same philosophy and software
as other SIPROTEC protection devices in
the switchgear
■ Wide variety of communication interfaces
for connection to the control system
(modules can also be retrofitted)
■ Time synchronization with the plant
control system (plant central clock)
■ Large display with single line diagram with
information about the switching device
positions, values of voltages and error
messages
High-Speed Busbar Transfer System using SIPROTEC 7SJ647
Display showing single -line diagram
■ High-speed transfer (simultaneous switching)
■ In-phase transfer
■ Residual-voltage transfer
■ Long-term transfer
Starting the transfer:
■ Manual – remotely or locally
■ By protection trip of one incoming feeder
■ Automatic (low-voltage detection)
■ By inadvertent opening of a breaker
Additional functions:
■ Breaker failure protection
■ Close and trip-circuit monitoring
■ Forced de-coupling
■ Continuous measurement of synchronism
■ Transfer blocking at switchgear fault
Technical data
Aufbau:
■ 48 programmable binary inputs
■ 29 programmable binary outputs
■ 14 programmable LEDs for signaling
■ Large graphical display
Auxiliary power supply:
110-250 V DC / 115-230 V AC
Power consumption (energized condition):
21 W (DC) / 33 W (AC)
Dimensions (W x H x D):
approx. 482 x 266 x 236 mm
Weight:
approx. 10 kg
Time synchronization:
DCF77 / IRIG B / SNTP
Answers for energy.
Technical details
Construction
The compact high-speed busbar transfer system from the
SPPA-E3000 portfolio is based on the established Siemens SIPROTEC
7SJ647 multi-functional protection device and can be used for
interruption-free transfer between two or three circuit-breakers.
Up to four voltage sources as well as position contacts of
the individual switching devices are connected to the device.
The implemented logic ensures that the correct two voltage sources
are compared with each other at any time.
As this selection is an integral part of the transfer device, no
additional auxiliary relays are needed. This simplifies the
interconnection which in turn increases the reliability.
This transfer system can be used for three different switchgear
configurations.
Communication with the plant control system
Communication with the other feeder protection relays within the
switchgear and with the plant control system can be established by
using one of the many selectable communication interfaces. The
most common are IEC 61850, PROFIBUS DP or PROFIBUS FMS,
MODBUS, DNP 3, IEC 60870-5-103.
In addition, the device is equipped with a time synchronization
interface and can be synchronized with the plant‘s central clock.
Parametrization
The DIGSI software and the CFC programming language are used to
create the transfer logic and interlocking conditions for each individual
application and network configuration. The internal programmable
logic controller of the device provides a fast and reliable medium to
implement the specific customer requirements for each project.
Programming example
Possible Configurations
Incoming 1
Incoming 2
7SJ647
Incoming 2
Incoming 1
7SJ647
Oscillographic Recorder
For each changeover operation the data of full voltage waves,
command signals and circuit-breaker positions are stored in the
internal memory of the device. The capacity enables the storing of
up to 8 subsequent events each with a duration of 5 seconds. The
data and the graphical figures can be exported from the device and
can be analyzed by using the SIGRA software.
Analysis in SIGRA (example)
Sectionalizer
Incoming 1
Incoming 2
Incoming 3
7SJ647
Published by and copyright © 2013:
Siemens AG, Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens Energy, Inc.
Instrumentation, Controls, & Electrical
1345 Ridgeland Parkway, Suite 116
Alpharetta, GA 30004, USA
For more information contact
sppa-er3000.energy@siemens.com
www.siemens.com/energy/sppa-e3000
E305_FP_HSBTS_e_V1-0
Order no. E50001-G230-A371-X-4A00
Printed in Germany
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the property of Siemens AG, its affiliates, or
their respective owners.
Subject to change without prior notice.
The information in this document contains
general descriptions of the technical options
available, which may not apply in all cases.
The required technical options should
therefore be specified in the contract.