Bender VMD423 Manual de usuario

Power in electrical safety

Operating Manual

VMD423

Voltage and frequency monitor

for monitoring of 3(N)AC systems up to 0...500 V

for undervoltage and overvoltage and under and overfrequency

Software version: D344 V3.1x

TGH1444en/04.2011

Dipl.-Ing. W. Bender GmbH & Co. KG

Londorfer Str. 65 • 35305 Grünberg • Germany

Postfach 1161 • 35301 Grünberg • Germany

Tel.: +49 6401 807-0

Fax: +49 6401 807-259

E-Mail: [email protected]om

Web: http://www.bender-de.com

©Dipl.-Ing. W. Bender GmbH & Co. KG

Reprinting only with permission

of the publisher.

Subject to change!

Table of Contents

TGH1444en/04.2011

1. How to use this documentation effectively ............................................... 5

1.1 How to use this manual ................................................................................. 5

2. Safety .................................................................................................................. 7

2.1 General ................................................................................................................. 7

2.2 Intended use ...................................................................................................... 7

2.3 Skilled person .................................................................................................... 7

2.4 Safety information on work activities on electrical installations .. 8

3. Function ............................................................................................................. 9

3.1 Device features ................................................................................................. 9

3.2 Function ............................................................................................................ 10

3.2.1 Calculating the average value of overvoltage .................................... 10

3.2.2 Automatic self test ........................................................................................ 10

3.2.3 Manual self test .............................................................................................. 10

3.2.4 Functional faults ............................................................................................ 11

3.2.5 Fault memory ................................................................................................. 11

3.2.6 Assigning alarm categories to alarm relays K1/K2 ............................ 11

3.2.7 Time delays t, ton and toff ........................................................................... 11

3.2.8 Start-up delay t ............................................................................................... 11

3.2.9 Response delay ton ....................................................................................... 11

3.2.10 Delay on release toff ...................................................................................... 11

3.2.11 Password protection (on, OFF) ................................................................. 12

3.2.12 Factory setting FAC ...................................................................................... 12

3.2.13 Erasable history memory ............................................................................ 12

3.2.14 Alarm LEDs show which relay is in the alarm state ........................... 12

3.2.15 Starting a device using a simulated alarm S.AL ................................. 12

4. Installation, connection and commissioning ........................................... 15

Table of Contents

4TGH1444en/04.2011

4.1 Installing the device ..................................................................................... 16

4.1.1 DIN rail mounting: ......................................................................................... 16

4.1.2 Screw mounting ............................................................................................ 16

4.2 Wiring of the device ..................................................................................... 17

4.3 Commissioning / factory setting ............................................................. 20

5. Operation and setting .................................................................................. 21

5.1 Getting to know the user interface ......................................................... 21

5.2 Understanding standard display indications ...................................... 23

5.3 Getting to know keys and key functions .............................................. 24

5.4 Querying values ............................................................................................. 25

5.5 Starting the self test manually .................................................................. 27

5.6 Clearing the fault memory ......................................................................... 27

5.7 Calling up or leaving the menu ................................................................ 27

5.8 Carrying out settings in the menu .......................................................... 27

5.8.1 Password protection .................................................................................... 27

5.8.2 Selecting menu items .................................................................................. 29

5.8.3 Carrying out settings in the menu item AL .......................................... 31

5.8.4 Carrying out settings in the menu item out ........................................ 35

5.8.5 Carrying out settings in the menu item t ............................................. 41

5.8.6 Carrying out settings in the menu item SEt ......................................... 42

5.8.7 Querying information in menu item INF .............................................. 44

5.8.8 Querying and clearing fault memory in the menu item HIS ......... 45

6. Technical data ................................................................................................ 47

6.1 Data in tabular form ..................................................................................... 47

6.2 Standards, approvals and certifications ................................................ 50

6.3 Ordering information ................................................................................... 51

INDEX .................................................................................................................... 53

TGH1444en/04.2011

1. How to use this documentation effectively

1.1 How to use this manual

This operating manual is designed for skilled persons working in electrical en-

gineering and electronics and must always be kept in an easily accessible lo-

cation near to the equipment.

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:

Information calling attention to hazards are marked

with this warning symbol.

Information intended to assist the user to make optimum

use of the product are marked with the Info symbol.

How to use this documentation effectively

6TGH1444en/04.2011

TGH1444en/04.2011

2. Safety

2.1 General

In addition to this manual, the documentation of the device includes a docu-

ment entitled "Important safety instructions for Bender products“.

2.2 Intended use

The voltage monitor VMD423 is used in 3(N)AC systems in accordance with

VDE V 0126-1-1 for undervoltage, overvoltage, underfrequency and overfre-

quency monitoring. The device is suitable for the nominal voltage range Un=

0...500 V in the frequency range 40...65 Hz.

The VMD423 requires a separate supply voltage Us.

2.3 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 stand-

ards 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 rele-

vant 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 reg-

ulations have to be observed and followed.

Safety

8TGH1444en/04.2011

2.4 Safety information on work activities on electrical in-

stallations

Touching live parts will cause danger of electric shock

with fatal consequences! All work activities on electrical

installations as well as installation activities, commis-

sioning activities and work activities with the device in

operation may only be carried out by electrically skilled

persons!

Danger of electric shock!

Unprofessional work activities on electrical installations

may result in a threat of danger to life and limb!

TGH1444en/04.2011

3. Function

3.1 Device features

 The VMD423 requires a separate supply voltage Us

 Monitoring for undervoltage and overvoltage and underfrequency and

overfrequency in 3(N)AC systems of AC 0...500 V / 0...288 V

 Monitoring of overvoltage U2 by average determination of the latest

10-minute measuring interval

 Asymmetry, phase failure and phase sequence monitoring

 Start-up delay, response delay and delay on release

 Adjustable switching hysteresis for the voltage to be monitored

 r.m.s. value measurement AC + DC

 Digital measured value display via multi-functional LC display

 LEDs: Power On, Alarm1 and Alarm2

 Fault memory for the operating value

 Cyclical self monitoring

 Internal test/reset button

 Two separate alarm relays (one changeover contact each)

 N/C or N/O operation and fault memory behaviour selectable

 Password protection for device settings

 Sealable transparent cover

 Available with screw-type or push-wire terminals

Function

10 TGH1444en/04.2011

3.2 Function

Once the supply voltage is applied, the start-up delay plus response delay (t +

ton1/2) begins. Throughout this time, an alarm is output via alarm LEDs and re-

lays. Measured voltage and frequency values being changed during this start-

up period t do not influence the alarm LEDs and the state of the alarm relays.

The devices utilise several separately adjustable measuring channels (over-

voltage/undervoltage, overfrequency/underfrequency). When the measured

value exceeds or falls below the response value, the alarm relays switch and

the alarm LEDs light up. When the measured value exceeds or falls below the

release value (response value plus hysteresis) after the alarm relays have

switched, the selected release delay toff begins. When toff has elapsed, the

alarm relays switch back to their initial position. With the fault memory acti-

vated, the alarm relays do not change their actual state until the reset button

R is pressed.

3.2.1 Calculating the average value of overvoltage

The overvoltage U2 is determined by calculating an average value of the last

10-minute measuring interval.

Always the highest average value U2 of each of the three voltages monitored

between L1-N, L2-N, L3-N will be indicated.

3.2.2 Automatic self test

The device automatically carries out a self test after connection to the system

to be monitored and later every hour. During the self test internal functional

faults are detected and will appear in form of an error code on the display. The

alarm relays are not tested during this time.

3.2.3 Manual self test

Pressing the test button for > 1.5 s causes the device to carry out a self test

where the internal functional errors are determined and shown on the display

as error codes. The alarm relays are not tested during this time.

While the test button T is pressed and held down, all device-related display el-

ements appear on the display.

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