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VMD460-NA
User guide
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Bender VMD460-NA User guide

Manual

VMD460-NA

Network and system protection (NS protection) for monitoring
the power feed-in of power generation systems
Software version: D398 V1.1x
Display software version: D403 V2.2x
VMD460-NA_D00001_01_M_XXEN/08.2013
Bender GmbH & Co. KG
Tel.: +49 6401 807-0 Fax: +49 6401 807-259
E-Mail: info@bender-de.com Web: http://www.bender-de.com
© Bender GmbH & Co. KG
All rights reserved. Reprinting only with permission of the publisher. Subject to change!
Table of Contents
1. How to use this documentation effectively ................................................ 7
1.1 How to use this manual ................................................................................. 7
1.2 Technical support: Service and support .................................................. 8
1.3 Workshops .......................................................................................................... 9
1.4 Delivery conditions, guarantee, warranty and liability .................... 10
2. Safety ................................................................................................................ 11
2.1 Intended use ................................................................................................... 11
2.2 Electrically skilled person ........................................................................... 11
2.3 General safety instructions ........................................................................ 12
3. Function ........................................................................................................... 13
3.1 Device features .............................................................................................. 13
3.2 Description of function ............................................................................... 14
3.2.1 Calculating the average value of overvoltage
(VDE-AR-N 4105, CEI 0-21, C10/11) ......................................................... 14
3.2.2 Self test, automatic ....................................................................................... 14
3.2.3 Manual self test .............................................................................................. 15
3.2.4 Remote-Trip (RTG / RT1) ............................................................................. 15
3.2.5 Malfunction and messages ........................................................................ 16
3.2.6 Delay times ton and toff ............................................................................. 17
3.2.7 Password protection .................................................................................... 17
3.2.8 Factory setting ............................................................................................... 17
3.2.9 Erasable history memory ............................................................................ 17
3.2.10 Passive islanding detection (df/dt) ......................................................... 18
VMD460-NA_D00001_01_M_XXEN/08.2013
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Table of Contents
4. Installation, connection and commissioning ........................................... 19
4.1 Unpacking ........................................................................................................ 19
4.2 Back-up fuses .................................................................................................. 19
4.3 Notes on mounting ...................................................................................... 20
4.4 Block diagram ................................................................................................. 20
4.5 Dimension diagram VMD460-NA ............................................................ 21
4.6 DIN rail mounting: ......................................................................................... 21
4.7 Screw mounting ............................................................................................ 21
4.8 Wiring diagram .............................................................................................. 22
4.8.1 VDE-AR-N 4105, BDEW, C10/11 ................................................................ 22
4.8.2 CEI 0-21 ............................................................................................................. 24
4.8.3 Details regarding the digital inputs (D1…D4, RT1) .......................... 27
4.9 Standards, selectable ................................................................................... 27
4.10 Commissioning .............................................................................................. 27
4.11 Trigger circuit test by the system erector ............................................. 28
5. Operation and configuration ...................................................................... 29
5.1 Getting to know the user interface ......................................................... 29
5.2 Various displays ............................................................................................. 30
5.2.1 Standard display ............................................................................................ 30
5.2.2 Info display ...................................................................................................... 31
5.2.3 Alarm display .................................................................................................. 31
5.2.4 Menu display ................................................................................................... 31
5.2.5 Toggling between the displays ................................................................ 32
5.3 INFO button ..................................................................................................... 33
5.4 Menu button ................................................................................................... 33
5.4.1 Alarm/meas. values ...................................................................................... 34
5.4.2 History ............................................................................................................... 35
5.4.3 Settings ............................................................................................................ 37
5.4.4 System ............................................................................................................... 38
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VMD460-NA_D00001_01_M_XXEN/08.2013
Table of Contents
5.4.5 Info ......................................................................................................................40
6. Maintenance ................................................................................................... 41
7. Selectable default settings ........................................................................... 43
7.1 VDE-AR-N 4105 .............................................................................................. 44
7.2 CEI 0-21 ............................................................................................................. 46
7.3 BDEW-guideline ............................................................................................. 49
7.4 C10/11 ............................................................................................................... 52
8. Technical data VMD460-NA ......................................................................... 55
8.1 Standards, approvals and certifications ................................................ 59
8.2 Ordering information .................................................................................. 59
INDEX ..................................................................................................................... 61
VMD460-NA_D00001_01_M_XXEN/08.2013
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Table of Contents
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VMD460-NA_D00001_01_M_XXEN/08.2013

1. How to use this documentation effectively

1. 1 How to use this manual

This operating manual will concern qualified experts in electrical engineering and user of the product and must be kept ready for referencing in the imme­diate vicinity of the device.
In order to make it easier for you to find specific text passages or references in this manual and for reasons of comprehensibility, important information is emphasised by symbols. The meaning of these symbols is explained below:
The warning symbol indicates a potential dangerous situation that may result in bodily injury and/or damage to property.
Observe the associated safety instructions.
Information intended to assist the user to make optimum use of the product are marked with the Info symbol.
Although great care has been taken in the drafting of this operating manual, it may nevertheless contain errors and mistakes.
The Bender Group cannot accept any liability for injury to persons or damage to property resulting from errors or mistakes in this manual. Each of the registered trademarks which appears in this document remains the property of its owner.
VMD460-NA_D00001_01_M_XXEN/08.2013
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How to use this documentation effectively

1. 2 Technical support: Service and support

For commissioning and troubleshooting Bender offers you:
First level support
Technical support by phone or e-mail for all Bender products
 Questions about special customer applications  Commissioning  Troubleshooting
Tel.: +49 6401 807-760* Fax: +49 6401 807-259 only available in Germany: 0700BenderHelp (Tel. and Fax) E-mail: support@bender-service.com
Repair service
Repair, calibration, update and replacement service for all Bender products
 Repair, calibration, testing and analysing Bender products  Hardware and software update for Bender devices  Delivery of replacement devices for faulty or incorrectly delivered
Bender devices
 Extended warranty for Bender devices with in-house repair service
resp. replacement devices at no extra cost
Tel.: +49 6401 807-780** (technical issues)
+49 6401 807-784**, -785** (commercial matters) Fax: +49 6401 807-789 E-mail: repair@bender-service.com
Please send the devices for repair to the following address:
Bender GmbH, Repair Service,
Londorfer Strasse 65,
35305 Gruenberg,
Germany
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VMD460-NA_D00001_01_M_XXEN/08.2013
How to use this documentation effectively
Field service
On-site service for all Bender products
 Commissioning, parameter setting, maintenance, troubleshooting for
Bender products
 Analysis of the electrical installation in the building (power quality test,
EMC test, thermography)
 Practical training courses for customers
Tel.: +49 6401 807-752**, -762 **(technical issues)
+49 6401 807-753** (commercial matters)
Fax: +49 6401 807-759
E mail: fieldservice@bender-service.com Internet: www.bender-de.com
*Available from 7.00 a.m. to 8.00 p.m. on 365 days of the year (CET/UTC+1) **Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m

1. 3 Workshops

Bender would be happy to provide training in respect of the use of the univer­sal measuring device. Current dates of training courses and workshops can be found on the Internet at
http://www.bender-de.com/en/know-how/seminars.
VMD460-NA_D00001_01_M_XXEN/08.2013
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How to use this documentation effectively

1. 4 Delivery conditions, guarantee, warranty and liability

The conditions of sale and delivery set out by Bender apply.
For software products, the "Softwareklausel zur Überlassung von Standard­Software als Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie" (software clause in respect of the licensing of standard software as part of de­liveries, modifications and changes to general delivery conditions for prod­ucts and services in the electrical industry) set out by the ZVEI (Zentralverband Elektrotechnik- und Elektronikindustrie e.V. (German Electrical and Electronic Manufacturers' Association) also applies.
Conditions of sale and delivery can be obtained from Bender in printed or electronic format.
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VMD460-NA_D00001_01_M_XXEN/08.2013

2. Safety

2. 1 Intended use

The voltage and frequency monitoring relay VMD460-NA is used for system and network protection (NS protection) of CHPs, wind, hydroelectric and pho­tovoltaic systems feeding power into the grid. If inadmissible voltage and frequency values occur on the supply side, the VMD460-NA has the task of disconnecting the power generation system from the distribution network by means of a coupling switch. The voltage and frequency monitoring relay is to be installed and connected directly at the central meter panel. The VMD460-NA utilises a separate supply voltage connection.
Power generation systems with an output of > 6 kW require a separate asymmetry monitoring.

2. 2 Electrically skilled person

Only electrically skilled persons are authorised to install and commission this device. Electrically skilled persons are those who have the relevant education, knowledge and experience, as well as knowledge of the relevant safety stand­ards and who are able to perceive risks and to avoid hazards which electricity can create when work activities are carried out on electrical installations. The electrically skilled person is specially trained for carrying out work activities in his specific working environment and has a thorough knowledge of the rele­vant standards and regulations. In Germany, an electrically skilled person must meet the requirements of the accident prevention regulation BGV A3. In other countries the applicable regulations have to be observed and followed.
VMD460-NA_D00001_01_M_XXEN/08.2013
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Safety

2. 3 General safety instructions

Bender devices are designed and built in accordance with the state of the art and accepted rules in respect of technical safety. However, the use of such de­vices may introduce risks to the life and limb of the user or third parties and/ or result in damage to Bender devices or other property.
Danger of electric shock!
Touching live parts will cause danger of electric shoc k with fatal consequences. All work activities on electrical installations as well as installation activities, commissioning activities and work activities with the device in operation may only be carried out by electrically skilled persons!
 Only use Bender equipment:
– as intended – in perfect working order – in compliance with the accident prevention regulations and guide-
lines applicable at the location of use
 Eliminate all faults immediately which may endanger safety.  Do not make any unauthorised changes and only use replacement
parts and optional accessories purchased from or recommended by the manufacturer of the equipment. Failure to observe this require­ment can result in fire, electric shock and injury.
 If the device is overloaded by overvoltage or a short-circuit current
load, it must be checked and replaced if necessary.
 If the device is being used in a location outside the Federal Republic of
Germany, the applicable local standards and regulations must be com­plied with. European standard EN 50110 can be used as a guide.
Device-specific safety information
After commissioning, the essential settings of the VMD460-NA have to be protected against unauthorised changes by a password.
If the password protection is not used, the device has to be sealed.
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VMD460-NA_D00001_01_M_XXEN/08.2013

3. Function

3.1 Device features

 Straightforward commissioning by means of default basic programs
for national standards and regulations
 Single-fault safety  Monitoring of the connected coupling switches  Islanding detection df/dt (ROCOF)  Service Interface RS-485 (software update)  Test function with determination of the disconnection time  Test button for the trigger circuit  The last 300 distribution network faults can be recalled with
time stamp/real-time clock
 Continuous monitoring of the phase voltage and line-to-line voltage  Special connection conditions after an infringement of a limit value  Language selection (German, English, Italian)  Backlit graphics LC display  Password protection for device setting  Remote shutdown via ripple control signal receiver  Sealable enclosure
VMD460-NA_D00001_01_M_XXEN/08.2013
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Function

3.2 Description of function

The power generation system is only allowed to connect to the public grid when the country-specific connection conditions are met. Mains voltage and mains frequency must be within the defined tolerance range. The devices utilise several separately adjustable measuring channels for:
 Voltage drop protection U <, U<<  Rise-in-voltage protection U >>, U10> / U> (depending on standard)  Frequency decrease protection f <, f<<  Frequency increase protection f >, f>>
This satisfies the requirements for static and dynamic network monitoring. In case of infringements of a limit value or a remote trip signal, the relay K1 (and K2, if necessary) switch and the alarm LEDs light. Reconnection to the grid is carried out when the national connection conditions to the grid are met. Pressing the test button ensures that the relays are checked and the re­quired test (trigger test) of the relays K1 and K2 is carried out.
3.2.1 Calculating the average value of overvoltage
(VDE-AR-N 4105, CEI 0-21, C10/11)
The overvoltage U10 is determined by averaging the last 10-minute measur­ing interval. Always the highest 10-minute average value value U10> of each of the three voltages monitored between L1-N, L2-N, L3-N will be indicated.

3.2.2 Self test, automatic

The device runs a continuous self test during which internal malfunctions are detected and shown on the display as error codes. The alarm relays are not switched during this test.
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VMD460-NA_D00001_01_M_XXEN/08.2013
Function

3.2.3 Manual self test

The self test cannot be started unless the power generation system has been started by the VMD460-NA (both alarm LEDs off) and the contact monitoring is installed and activated. Start of the manual self test:
1. Press the test button in the standard display (> 1.5 s) or
2. select "TEST" from the menu display
The alarm relays K1 and K2 switch during the self test and open resp. close the contacts 11/12/14 and 21/22/24. The self test continues to run until the defined disconnection time t undervoltage condition has elapsed.
Both coupling switches are switched off during the self test.
at
off
During the self test, the times are measured until the switching command for the coupling switches (t (t
) trip. These periods are automatically indicated by alarm displays
off (TOTAL)
off (DEVICE)
for the measuring channels 15 (t available in the "Alarm/meas. value" menu.
) is activated or until the coupling switches
off (TOTAL)
) and 16 (t
off (DEVICE)
). They are also

3.2.4 Remote-Trip (RTG / RT1)

The activation of this function is optional and can be used to separate the power generation system from the supply network remotely via an external contact. After activating the remote control, the coupling switch will be switched after ≤ 50 ms.
This function can be deactivated in the "Settings / General / Remote Trip = off" menu, if not required.
VMD460-NA_D00001_01_M_XXEN/08.2013
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Function

3.2.5 Malfunction and messages

In case of malfunctions or messages, the power generation system will be separated from the supply network.
In the case of an internal malfunction or an error in the operation of the cou­pling switches, both alarm LEDs will flash. The error code or the message in plain text is indicated on the display. If several faults or messages occur simultaneously, they will be displayed alter­nately at four-second-intervals. In the case of an internal error, make a note of the error code "xx" and contact the Bender Service.
Code/ Message
1…20
contact monit. K1
contact monit. K2
16
LED Meaning Remedy
Both LEDs flash
Both LEDs flash
Internal error
Error: Contact monitoring K1
Error: Contact monitoring K2
Make a note from the error code "xx“ and contact the Bender Service.
After rectifying the the fault at the coupling switch/main switch (e.g. manual connec­tion of the backup switch), the fault is automatically cleared. Should, however, a fault have occurred three times within 30 seconds, nor­mal operation must be started again after fault recti­fication by pressing the "RESET" button (in the stand­ard display).
VMD460-NA_D00001_01_M_XXEN/08.2013
Function
Code/ Message
23
Remote trip
Enter norm
3.2.6 Delay times t
Delay time for connection t
When all voltage and frequency values measured, meet the conditions for connection during the delay time for connection, the alarm LEDs will go out and the alarm relays will switch.
Response delay t
Minimum period for an error to exist until the alarm relays will switch.
LED Meaning Remedy
Both LEDs flash
Both LEDs light con­tinuosly
Both LEDs light con­tinuosly
off
Internal error
Remote trip active
No norm selected
and t
on
off
on
Make a note from the error code "xx“ and contact the Bender Service.
Activate RTG/RT1 or deacti­vate the input via the menu (off)
Select the application norm from the menu.

3.2.7 Password protection

By default, the password protection is deactivated (off).

3.2.8 Factory setting

After activating the factory setting, all previously changed settings are reset to delivery status.

3.2.9 Erasable history memory

The device utilises a history memory for failsafe storing of up to 300 data records (date, time, channel, event code, measured value).
VMD460-NA_D00001_01_M_XXEN/08.2013
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Function

3.2.10 Passive islanding detection (df/dt)

The VMD460-NA uses a passive method for islanding detection (three-phase voltage and frequency monitoring).
df/dt
The monitoring of the rate of change of frequency "ROCOF" (df/dt) is an islanding detection function. If a section of the network is disconnected by the energy provider, it may hap­pen that the power generation systems located in this section unintentionally feed this section of the network. Underfrequency and overfrequency monitoring might not be sufficient to de­tect this dangerous, uncontrollable state, since the generators try to keep the frequency at the nominal frequency level.
Due to the unbalance between generated and consumed energy, however, the frequency fluctuates around the nominal frequency. If this happens at a certain minimum speed, this is an indication of islanding, hence the power generation system will be disconnected by the VMD460-NA.
As soon as the rate of change of frequency is below the response value hysteresis and t nected.
has expired, the power generation system will be recon-
on
t
off
Response delay: the time during which a limit value (df/dt) must be violated until the power generation system is disconnected by the VMD460-NA.
t
on
Delay time, if df/dt disconnected the system.
Measuring window Period of time used to calculate the average of the fre-
quency changes. The bigger the measuring window is selected the less sensitive will the df/dt function be.
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VMD460-NA_D00001_01_M_XXEN/08.2013

4. Installation, connection and commissioning

Danger of electric shock! Make sure that the installation area is disconnected from any electrical source . Consider the data on the rated voltage and supply voltage as specified in the technical data!

4.1 Unpacking

 Unpack all the parts supplied with the system. Avoid sharp-edged tools
that may damage the content of the packaging.
 Compare your order with our delivery note to check that you have
received all products in full. The article numbers and type designation printed on the nameplates provide an easy means of uniquely identify­ing each device.
 Check all parts supplied for any evidence of damage in transit.  Equipment damaged in transit must not be used. If a device has sus-
tained damage, please contact Bender. Details of who to contact are indicated on the delivery documents.
 When storing the devices in an environment where the temperature is
wintry and cold: Leave the devices to stand for 3 to 4 hours at room temperature before connecting the power supply. When the devices are moved from a cold to a warm environment, condensation will be evident on all parts. Putting damp devices into operation risks damaging electrical compo­nents and there is a danger of electric shock on contact.

4.2 Back-up fuses

Equip the supply voltage of all system components with fuses. IEC 60364-4-43 requires protective devices to be used to protect the component in the event of a short circuit. We recommend the use of 6 A fuses.
VMD460-NA_D00001_01_M_XXEN/08.2013
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Installation, connection and commissioning

4.3 Notes on mounting

Danger of electric shock! Make sure that the installation area is disconnected from any electrical source . Consider the data on the rated voltage and supply voltage as specified in the technical data!
The length of the connecting cable of the device connections DG1/2, D1, D2, DG3/4, D3, D4, RTG and RT1 is to be limited to 3 m.
To ensure the VMD460-NA's functionality aft er a power failure, it is recommended to use an external UPS.
The devices are suitable for the following types of installation:
 Standard distribution panels according to DIN 43871 or DIN rail mount-
ing according to IEC 60715
 Screw mounting using M4 screws

4.4 Block diagram

Coupling switch
Public grid
VMD460
Coupling switch
Power generation system
Fig. 4.1: Block diagram of a central NS protection with coupling switches
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