Increased plant safety and
availability with digital generator
protection
Cost reduction and protection of resources
have lead to an increasing demand for modernization and improved efficiency of
existing installations and power plants.
Spare parts for many obsolescent protective
systems are no longer available or may
only be purchased at high prices and with
long delivery times.
The service life and availability of obsolescent systems may be considerably extended
by using interference resistant components.
Modern protective systems generally have
to comply with the following requirements:
increased reliability, ease of use, failure
analysis, and DCS-connection.
Digital generator protection
with SIPROTEC 7UM62
SIPROTEC protective device 7UM62
The protective device 7UM62 is part of the
SIEMENS SIPROTEC product line. SIPROTEC
units are multifunctional compact devices
and particularly designed for power generation plants.
The selection of different protection modules and protective functions allows
an optimal adaptation of the device to the existing installation.
A reliable protection of electric machines
requires numerous protective functions,
whose scope and combination are determined by different factors like machine
size, operating mode, availability, and plant design.
Answers for energy.
The protective device 7UM62 may be used
as substitute for all current products.
A huge number of communication modules
enable a direct connection to the DCS.
Programming software DIGSI 4
(optional)
The PC program DIGSI 4 is the interface
between user and protective device.
The device‘s parameters are set and analyzed
by a modern, intuitive user interface.
The standardized software for all SIPROTEC
products runs on WINDOWS.
The required protective functions may be
selected from an extensive list depending
on the protective module (see figure 1).
Information of individual protective functions is transferred simply and quickly on
LEDs and relays via the matrix (figure 2).
With only one click the user can create a
link to the DCS.
Necessary logic operations of signals and
functions are realized by the CFC Editor.
Failures may be graphically analyzed with
the auxiliary module SIGRA.
Fig. 1: function selection
Fig. 1: matrix
Moreover, the program supports users with
extensive test functions during start-up.
Specifications protective
device 7UM62:
Optional functions:
Auxiliary supply
(power supply, signal voltage)
with mains frequency voltage feed and 1 to
3 Hz voltage feed, respectively.
Rotor earth fault
24V - 220V DC
Stator earth fault 100 %
115V - 230V AC
with 20 Hz voltage feed layout/testing of
necessary load equipment on request
Analog inputs:
3x measurement inputs current (current lead) : 1/5A
3x measurement inputs current (neutral point) : 1/5A
2x sensitive current inputs (earth current I0) : 1,6A
3x measurement inputs voltage (leakage) : 100V - 125V
1x measurement inputs voltage U0 : 100V - 125V
3x transducer input : ±10V oder ±20mA
Input channels/Output channels:
Type I:
- 15 binary inputs
- 21 binary outputs
Type II (optional): - 7 binary inputs (*)
- 12 binary outputs (*) with add. bus interface
Thermobox
for the monitoring of generator relevant
temperatures
Optional software:
Parameter set-up software DIGSI 4
for the parameter set-up of the protective
device, according to model with/without fault record analysis SIGRA and CFC Editor
Delivery options
single device (flush or surface mounting
housing) for the integration into an existing installation,
in control cabinet, fully wired unit in single or redundant design with and without earth fault detection
Type III (on request): Type I with add. bus interface 14 LEDs (red) for both types
Choice between one of the following interface protocols (please specify with order):
IEC 60870-5-103
Profibus DP Slave
Modbus
DNP3.0
IEC 61850 (100 Mbit Ethernet)
(*) With bus interface fewer binary outputs are required as signals are transmitted via the bus.
Benefits at a glance
affordable alternate device with multivendor capability, i.e. also suitable for
many third-party products
compact device with a huge number of protective functions
excellent and extensive adaptabilities
through integrated software modules
versatile applications (fig. 3)
easy parameter set-up with DIGSI 4 software
cost-saving spares inventory with only
one singe device
Generator in busbar operation
Overcurrent (51, 50/51/67, 51V)
Generator in unit-system operation
Overcurrent (51, 50/51/67, 51V)
Differential (87G)
Differential (87G)
Rotor earth fault (64R)
Rotor earth fault (64R)
Stator earth fault (59N/67G)
Stator earth fault (59N)
Over-/undervoltage (27/59)
Over-/undervoltage (27/59)
Over-/underfrequency (81)
Over-/underfrequency (81)
Reverse power (32R)
Reverse power (32R)
Overload (49)
Overload (49)
Unbalanced load (46)
Unbalanced load (46)
Under-/overexcitation (40/24)
Under-/overexcitation (40/24)
Underimpedance (21)
Fig. 3: Applications of SIPROTEC 7UM62 as generator protection
Published by and copyright © 2008:
Siemens AG Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens Power Generation, Inc.
4400 Alafaya Trail
Orlando, FL 32826-2399, USA For more information, contact our
Customer Support Center.
Phone:+49 180/524 70 00
Fax: +49 180/524 24 71
(Charges depending on provider)
e-mail: support.energy@siemens.com
www.siemens.com/energy-support
Order No. A96001-G90-B168-X-4A00
Printed in Germany
1386 J DA 0208 1.
All rights reserved.
Subject to change without prior notice.
Printed on paper treated with chlorinefree bleach.
Trademarks mentioned in this docu-
ment are the property of Siemens AG, its affiliates, or their respective owners.
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.