Siemens 7XT71 Series User manual

7XT7100-0*A00/DD
Copyright Siemens AG 2009
Manual / Руководство Order No / Номер заказа: C53000-B119U-C128-1
Di
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Controller Unit 7XT71
(for the rotor earth fault protection, 1-3 Hz)
Р
уководство по эксплуатации
Р
усский: страница
23
Контроллер 7XT71
(для защиты ротора от замыканий на землю, 1-3 Гц)

English / Русский 7XT7100-0*A00/DD
2C53000-B119U-C128-1

7XT7100-0*A00/DD English
C53000-B119U-C128-1 3
Contents
Statement of Conformity ................................................................................................... 4
Notes and Warnings .......................................................................................................... 4
Unpacking and Re-packing ............................................................................................... 6
Storage and Transport ...................................................................................................... 6
Installation Hints ................................................................................................................ 7
Arrangements .................................................................................................................. 11
Ordering Data .................................................................................................................. 12
Dimensions and Connections ......................................................................................... 13
Technical Data ................................................................................................................ 15
Electrical Tests ................................................................................................................ 16
Mechanical Stress Tests ................................................................................................. 18
Climatic Stress Tests ...................................................................................................... 19
Service Conditions .......................................................................................................... 19
Design ............................................................................................................................. 20
General Diagram ............................................................................................................. 20
Connection Example ....................................................................................................... 21

English 7XT7100-0*A00/DD
4C53000-B119U-C128-1
Statement of Conformity
This product complies with the directive of the Council of the European Communities on the
approximation of the laws of the member states relating to electromagnetic compatibility
(EMC Council Directive 2004/108/EC) and concerning electrical equipment for use within
specified voltage limits (Low-voltage Directive 2006/95/EC).
This conformity has been proved by tests performed according to the Council Directive in
agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 (for EMC directive)
and with the standards EN 60255-6 (for low-voltage directive) by Siemens AG.
The device is designed and manufactured for application in industrial environment.
The product conforms with the international standards of IEC 60255 and the German
standards VDE 0435.
Notes and Warnings
The warnings and notes contained in this booklet serve for your own safety and for an
appropriate lifetime of the device. Please observe them!
The following terms are used:
DANGER
indicates that death, severe personal injury or substantial property
damage will result if proper precautions are not taken.
Warning
indicates that death, severe personal injury or substantial property
damage can result if proper precautions are not taken.
Caution
indicates that minor personal injury or property damage can result if
proper precautions are not taken. This is especially valid for damage on
or in the device itself and consequential damage thereof.

7XT7100-0*A00/DD English
C53000-B119U-C128-1 5
QUALIFIED PERSONNEL
For the purpose of this quick reference and product labels, a qualified person is one who is
familiar with the installation, construction and operation of the equipment and the hazards
involved. In addition, he has the following qualifications:
Is trained and authorized to energize, de-energize, clear, ground and tag circuits and
equipment in accordance with established safety practices.
Is trained in the proper care and use of protective equipment in accordance with
established safety practices.
Is trained in rendering first aid.
Note
indicates information about the device or respective part of this booklet
which is essential to highlight.
Warning!
Hazardous voltages are present in this electrical equipment during
operation. Non-observance of the safety rules can result in severe
personal injury or property damage.
Only qualified personnel shall work on and around this equipment after
becoming thoroughly familiar with all warnings and safety notices of this
booklet as well as with the applicable safety regulations.
The successful and safe operation of this device is dependent on proper
transport and storage, proper handling, installation, operation, and
maintenance by qualified personnel under observance of all warnings
and hints contained in this booklet.
In particular the general erection and safety regulations (e.g. IEC, EN,
DIN, VDE, or other national and international standards) regarding the
correct use of hoisting gear must be observed. Non-observance can
result in death, personal injury or substantial property damage.

English 7XT7100-0*A00/DD
6C53000-B119U-C128-1
Unpacking and Re-packing
When dispatched from the factory, the equipment is packed in accordance with the
guidelines laid down in IEC 60255-21 which specify the impact resistance of packaging.
This packing shall be removed with care, without force and without the use of inappropriate
tools. The equipment should be visually checked to ensure that there are no external traces
of damage.
Please observe absolutely all notes and hints which may be enclosed in the packaging.
Before initial energization with supply voltage, or after storage, the device shall be situated
in the operating area for at least two hours in order to ensure temperature equalization and
to avoid humidity influences and condensation.
For further transport, the transport packing can be re-used when applied in the same way.
The storage packing of the individual relays is not suited for transport. If alternative packing
is used, this must also provide the same degree of protection against mechanical shock and
vibration as laid down in IEC 60255-21-1 class 2 and IEC 60255-21-2 class 1.
Storage and Transport
The device should be stored in dry and clean rooms. The limit temperature range for storage
of the relays or associated spare parts is -25 °C to +55 °C, corresponding to -13 °F to 131 °F.
The relative humidity must be within limits such that neither condensation nor ice forms.

7XT7100-0*A00/DD English
C53000-B119U-C128-1 7
Installation Hints
Secure the unit with four screws to the panel. Verify sufficient space to adjacent relays in
case of model -*B***. Refer to Figures 6 and 7 for dimensions and connection hints.
Make a solid low-resistance and low-inductance earth connection between the earthing
surface at the side or rear wall of the unit using at least one standard screw M4, and the
earthing continuity system of the panel or cubicle.
Make connections via the screwed or snap-in terminals. Observe labelling of the individual
terminals to ensure correct location. Observe the max. permissible conductor cross-sections
and torque values as well as the bending radius. Use copper conductors only! The use of
the screwed terminals is recommended; snap-in connection (on models for panel flush
mounting or cubicle installation) requires special tools and must not be used for field wiring
unless proper strain relief is ensured. Refer to Figures 6 and 7 for connection hints.
For screwed terminals, ring cable lugs type PIDG of Messrs. Tyco Electronics AMP are
recommended.
The screwed terminals of models for panel surface mounting can be connected without ring
cable lugs. The use of flexible wires requires end sleeves.
Caution!
The printed circuit boards of numerical relays contain CMOS circuits.
These shall not be withdrawn or inserted under live conditions! The
modules must be so handled that any possibility of damage due to static
electrical charges is excluded. During any necessary handling of
individual modules the recommendations relating to the handling of
electrostatically endangered components (EEC) must be observed.
In installed conditions, the modules are in no danger.

English 7XT7100-0*A00/DD
8C53000-B119U-C128-1
Power Supply Modification:
For nominal voltages of 100, 110, 115 and 230 Vac terminals 7 and 9 are used.
The changeover between the range of 100 to 115 Vac and 230 Vac is carried out via switch
S1. The latter is located on the printed circuit board in such a way that it is easily accessible.
Its two switch positions are marked with "115 V" and accordingly "230 V". The default setting
is "115 V".
For nominal voltages of 120 and 125 Vac the connection terminals 7 and 11 are used. The
switch S1 is put into position "115 V"
Any change in the default setting of the auxiliary voltage matching of 100...125 Vac may be
indicated on the label of the front panel of the device making a cross on the corresponding
voltage value
Figure 1 Label on front panel

7XT7100-0*A00/DD English
C53000-B119U-C128-1 9
Setting the Frequency of Polarity Reversal:
Via a quadruple switch S2 located on the printed circuit breaker 8 different frequencies of
polarity reversal can be selected.
The frequency of polarity reversal in the default setting is 1,5 Hz. Any changes in the default
setting of the frequency of polarity reversal may be indicated on the label of the front panel
of the device (see Figure 1) making a cross on the corresponding frequency value.
The following figure is a partial view of a module pulled out of the housing. Position and
designation of the relevant switches can also be learned from this illustration.
Figure 2 Part view of the board
Switch S2
Frequency of polarity reversal S2.1 S2.2 S2.3 S2.4
0.5 Hz OFF OFF OFF OFF
1.0 Hz OFF ON OFF OFF
1.5 Hz OFF OFF ON OFF
2.0 Hz OFF ON ON OFF
2.5 Hz OFF OFF OFF ON
3.0 Hz OFF ON OFF ON
3.5 Hz OFF OFF ON ON
4.0 Hz OFF ON ON ON
Front panel

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10 C53000-B119U-C128-1
Figure 3 Switch positions (example)
Matching the frequency of polarity reversal:
The preset value of 1.5 Hz is an experimental value and usually the user does not have to
change it.
The value must be lowered in case of larger rotor earth capacitances or if the excitation
system is equipped with capacitors towards earth. Read out the operational measured value
Rearth of the protective device. If the value of the rotor earth capacitance is too low supposed
there is no fault, the frequency of polarity reversal is to be reduced. As an alternative, the
fault recording function of the device can be applied. When executing fault recording select
its instantaneous value acquisition mode. Furthermore, a test record must be initiated via the
operating program with the generator not being excited. To ensure proper functioning the
protection system needs a signal, which is charge exchange free for approx. 100 ms, each
time polarity reversal is carried out (see Figure 4).
Figure 4 Charge exchange process with the generator not being excited
For smaller rotor-earth-capacities the user may raise the frequency of polarity. In a next step
please check the measured results with the machine being excited.
F
ron
t
v
i
ew o
f
sw
it
c
h
S1
an
d
S2
:
Position „230 V” Position „0,5 Hz”
F
ac
t
ory se
t
:
Position „115 V” Position „1,5 Hz”
UMess(t)
approx. 100 ms
approx. 100 ms

7XT7100-0*A00/DD English
C53000-B119U-C128-1 11
Power Supply Fuse:
The power supply of the device is protected by fine-wire fuse T315H250V. The latter is hold
by a snap-in fastener which is located on the printed circuit board. The fine-wire fuse can
easily be accessed by pulling the module out of the housing (see Figure 2).
Arrangements
All functions including transformer are accommodated on a printed circuit board. This p.c.b.
forms, complemented by a guide plate, a multi-pin connector module and a front unit, a plug-
in module which is installed in a housing 7XP20.
The guide plate cams in conjunction with distance pieces on the p.c.b. and the shaping of
the connector modules ensure proper mounting and fixing of the module. The inner part of
the housing is free from enamel and thus functions as a large contact plane and shield with
solid electrical conductivity and mates with the earthing blades of the module. Connection to
earth is made before the plugs make contact. An earthing area has been provided at the
housing to which grounding strips can be connected in order to ensure solid low-impedance
earthing.
The degree of protection for the housing is IP51, for the terminals IP21.
Two different types of housings can be delivered:
7XT7100-0BA00 in housing 7XP20 with terminals at both sides for panel surface
mounting
The housing is built of a metal tube and carries a terminal block with four holes for fixing
the relay to the panel.
All external signals are connected to the terminal block which is mounted without screws
at the rear of the housing. For each electrical connection, one screwed terminal for the
use of up to two ring cable lugs is provided. Alternatively, up to two solid bare wires (even
with different diameter) can be connected directly. Use copper conductors only!
For dimensions please refer Figure 4.
7XT7100-0EA00 in housing 7XP20 with terminals at the rear for panel flush mounting
or cubicle installation
The housing is built of a metal tube and carries fixing angles for mounting into the panel
cut-out or into the cubicle rack.
All external signals are connected to a connector block which is mounted without screws
at the rear of the housing. For each electrical connection, one screwed terminal for the
use of up to two ring cable lugs and one parallel snap-in terminal are provided. For field
wiring, the use of the screwed terminals is recommended; snap-in terminals require
special tools. Do not connect them with single wires without cable lugs. Use copper
conductors only!
For dimensions please refer Figure 5.

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12 C53000-B119U-C128-1
Ordering Data
Figure 5 Ordering data
Controller Unit
Construction
in housing for panel surface mounting with terminals at both sides
in housing for panel flush mounting or cubicle installation

7XT7100-0*A00/DD English
C53000-B119U-C128-1 13
Dimensions and Connections
Figure 6 7XT7100-0BA00 Housing for panel surface mounting with terminals at both sides
Connections
for earthing
Recommended space to the
next unit
Dimensions in mm
View A Current connections (terminals 1 to 6):
not used in 7XT71
Voltage connections (terminals 7 to 31):
isolated ring cable lug:
for bolts 4 mm diameter
max. major diameter 9 mm
type: e.g. PIDG of Messrs.
Tyco Electronics AMP
for copper wires with cross-section
1.0 mm2to 2.6 mm2
AWG 17 to 13
solid bare copper wire directly:
cross-section 0.5 mm2 to 2.6 mm2
AWG 20 to 13
flexible wire requires end sleeves
max. torque value:
1.8 Nm or 16 in-lbs

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14 C53000-B119U-C128-1
Figure 7 7XT7100-0EA00 Housing for panel flush mounting or cubicle installation
Connections
for earthing
Dimensions in mm
Mounting plate
Current connections (terminals 1 to 6):
not used in 7XT71
Voltage connections (terminals 7 to 31):
isolated ring cable lug:
for bolts 4 mm diameter
max. major diameter 9 mm
type: e.g. PIDG of Messrs.
Tyco Electronics AMP
for copper wires with cross-section
1.0 mm2to 2.6 mm2
AWG 17 to 13
Snap-in terminal:
for copper wires with cross-section
0.5 mm2to 2.5 mm2
AWG 20 to 13
max. torque value1.8 Nm or 16 in-lbs
Connections terminals
Panel cut-out
or

7XT7100-0*A00/DD English
C53000-B119U-C128-1 15
Technical Data
Auxiliary voltage
1) Switch S1 in position "115 V" (Default setting)
2) Switch S1 in position "230 V"
Power consumption approx. 5 VA
Output voltage UOutput
short-circuit-proof
Terminals 25, 27 ±50 V (±4V)
max. output current 20 mA
Output voltage UControl
short-circuit-proof
Terminals 19, 21 < 15 V
max. output current 2 mA
Output voltage UMeas
short-circuit-proof
Terminals 15, 17 < 15 V
max. output current 2 mA
Frequency of polarity reversal
Setting range 0.5 to 4.0 Hz ±10 %
convertible with switch S2
Default setting 1.5 Hz ±10 %
Terminals 7, 9 7,11 7, 9
Nominal auxiliary a.c. voltage
Uaux. ac 50/60 Hz
100, 110, 115 Vac 1) 120, 125 Vac 1) 230 Vac 2)
Permissible variations ac
Temperature in range
-5 to +40 °C
-5 to +55 °C
80 to 132 V~
80 to 127 V~
96 to 144 V~
96 to138 V~
184 to 264 V~
184 to 253 V~

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16 C53000-B119U-C128-1
Firmware-version of the protection relay 7UM
7UM515 ≥V3.11
7UM62 ≥V4.1
Electrical Tests
Insulation tests
Standards: IEC 60 255-5
and IEC 60870-2-1
- High voltage test (routine test) 4 kV (rms); 50 Hz
Output: Terminals 25, 27 against
all others terminals
- High voltage test (routine test) 3.5 kV dc
Auxiliary voltage: Terminals 7, 9, 11 against
all others terminals
- High voltage test (routine test) 3.5 kV dc
Outputs: Terminals 15, 17, 19, 21 against
all others terminals
- Impulse voltage test (type test) 5 kV (peak); 1.2/50 ms; 0.5 J; 3 positive
all circuits, class III and 3 negative impulses at intervals
of 5 s
EMC tests; immunity (type tests)
Standards: IEC 60 255-6, IEC 60 255-22
(product standards)
EN 50082-2 (generic standard)
VDE 0435 /part 303
- High frequency 2.5 kV (peak); 1 MHz; τ=15 μs;
IEC 60 255-22-1, class III 400 surges per s; duration 2 s
- Electrostatic discharge 4 kV/6 kV contact discharge; 8 V
IEC 60 255-22-2 class III air discharge; both polarities;
and IEC 61 000-4-2, class II I 150 pF; Ri= 330 ohms
- Radio-frequency electromagnetic field, 10 V/m; 27 MHz to 500 MHz
non-modulated; IEC 60 255-22-3 (report) class III;
- Radio-frequency electromagnetic field, 10 V/m; 80 MHz to 1000 MHz;
amplitude modulated; IEC 61 000-4-3, class III 80 % AM; 1 kHz
- Radio-frequency electromagnetic field, puls 10 V/m; 900 MHz;
modulated; IEC 61 000-4-3/ENV 50204, class III repetition frequency 200 Hz;
duty cycle 50 %

7XT7100-0*A00/DD English
C53000-B119U-C128-1 17
- Fast transients 2 kV; 5/50 ns; 5 kHz;
IEC 60 255-22-4 burst length 15 ms;
and IEC 61 000-4-4, class III repetition rate 300 ms; both polarities;
Ri= 50 ohms; duration 1 min
- Conducted disturbances induced by 10 V; 150 kHz to 80 MHz; 80 % AM;
radio-frequency fields, amplitude modulated 1 kHz
IEC 61 000-4-6, class III
- Power frequency magnetic field 30 A/m continuous; 300 A/m for 3 s;
IEC 61 000-4-8, class IV 50 Hz; 0.5 mT; 50 Hz
IEC 60 255-6
Further EMC tests; immunity (type tests)
- Oscillatory surge withstand capability 2.5 kV to 3 kV (peak);
ANSI/IEEE C37.90.1 1 MHz to 1.5 MHz,
decaying oscillation; 50 surges per s;
duration 2 s; Ri= 150 to 200 ohms
- Fast transient surge withstand capability 4 kV to 5 kV; 10/150 ns;
ANSI/IEEE C37.90.1 50 surges per s; both polarities;
duration 2 s; Ri= 80 ohms
- Radiated electromagnetic interference 35 V/m
ANSI/IEEE C37.90.2 25 MHz to 1000 MHz;
- Damped oscillations 2.5 kV (peak, alternating polarity);
IEC 60694 1 MHz, 10 MHz and 50 MHz,
IEC 61000-4-12 decaying oscillation; Ri= 200 ohms
EMC tests; emission (type tests)
Standard: EN 50081-1 (generic standard)
- Conducted interference voltage, aux. voltage 150 kHz to 30 MHz
CISPR 22, EN 55022, class B
- Interference field strength 30 MHz to 1000 MHz
CISPR 22, EN 55022, class B

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18 C53000-B119U-C128-1
Mechanical Stress Tests
Vibration and shock during operation
Standards: IEC 60 255-21
and IEC 60 068-2
- Vibration sinusoidal
IEC 60 255-21-1, class 2 10 Hz to 58 Hz: ±0.075 mm
IEC 60 068-2-6 amplitude;
58 Hz to 150 Hz: 1 g acceleration
sweep rate 1 octave/min
20 cycles in 3 orthogonal axes
- Shock half sine
IEC 60 255-21-2, class 1 acceleration 5 g, duration 11 ms,
IEC 60068-2-27 3 shocks in each direction of
3 orthogonal axes
- Seismic vibration sinusoidal
IEC 60 255-21-3, class 1 1 Hz to 8 Hz: ±3.5 mm amplitude
IEC 60 068-3-3 (horizontal axis)
1 Hz to 8 Hz: ±1.5 mm amplitude
(vertical axis)
8 Hz to 35 Hz: 1 g acceleration
(horizontal axis)
8 Hz to 35 Hz: 0.5 g acceleration
(vertical axis)
Frequency sweep rate 1 octave/min
1 cycle in 3 orthogonal axes
Vibration and shock during transport
Standards: IEC 60 255-21
and IEC 60 068-2
- Vibration sinusoidal
IEC 60 255-21-1, class 2 5 Hz to 8 Hz: ±7.5 mm amplitude;
IEC 60 068-2-6 8 Hz to 150 Hz: 2 g acceleration
sweep rate 1 octave/min
20 cycles in 3 orthogonal axes
- Shock half sine
IEC 60 255-21-2, class 1 acceleration 15 g, duration 11 ms,
IEC 60 068-2-27 3 shocks in each direction of
3 orthogonal axes
- Continuous shock half sine
IEC 60 255-21-2, class 1 acceleration 10 g,
IEC 60 068-2-29 duration 16 ms, 1000 shocks
each direction of 3 orthogonal axes

7XT7100-0*A00/DD English
C53000-B119U-C128-1 19
Climatic Stress Tests
Temperature
Standard: IEC 60255-6
- recommended temperature during service
Rated auxiliary voltage +15 % -5 °C to +40 °C
Rated auxiliary voltage +10 % -5 °C to +55 °C
- permissible temperature during storage -25 °C to +55 °C
- permissible temperature during transport -25 °C to +70 °C
Storage and transport with standard works packaging!
Humidity
- Permissible humidity mean value per year ≤75 %
relative humidity;
on 56 days per year 95 % relative
humidity;
condensation not permissible!
All units shall be installed such that they are not subjected to direct sunlight, nor to large
temperature fluctuations which may give rise to condensation.
Service Conditions
The relay is designed for use in industrial environment, for installation in standard relay
rooms and compartments so that with proper installation electro-magnetic compatibility
(EMC) is ensured. The following should also be heeded:
All contactors and relays which operate in the same cubicle or on the same relay panel
as the digital protection equipment should, as a rule, be fitted with suitable spike
quenching elements.
7XT71 and 7UM515 or 7UM62 should be mounted in the same cubicle, if possible, or at
least close to each other.
connection lines between 7XT71 and 7UM515 or 7UM62 must be shielded and their
length should not exceed 2 m.
It is not permissible to withdraw or insert individual modules under voltage. In the with
drawn condition, some components are electrostatically endangered; during handling the
standards for electrostatically endangered components must be observed. The modules
are not endangered when plugged in.
Warning !
The relay is not designed for use in residential, commercial or light-
industrial environment as defined in EN 50081.

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20 C53000-B119U-C128-1
Design
Housing 7XP20
Dimensions see Section "Dimensions and
Connections"
Weight
- in housing for surface mounting approx. 3.5 kg
- in housing for flush mounting approx. 3.0 kg
Degree of protection acc. to EN 60529
- Housing IP 51
- Terminals IP 21
General Diagram
Figure 8 General diagram of controller unit 7XT1 00-0KA00
Auxiliary voltage
Flush mounting housing
Surface mounting housing
UCon-
UMea
UOut-
Protection
device 7UM
Factory set: 100 to 125 Vac
Coupling unit
7XR60