Siemens 7XT71 Series Manual de usuario

7XT7100-0*A00/DD

Manual / Руководство Order No / Номер заказа: C53000-B119U-C128-1

rect

ons

: page

Controller Unit 7XT71

(for the rotor earth fault protection, 1-3 Hz)

уководство по эксплуатации

усский: страница

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

English 7XT7100-0*A00/DD

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.

ron

ew o

Position „230 V” Position „0,5 Hz”

ory se

Position „115 V” Position „1,5 Hz”

UMess(t)

approx. 100 ms

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