Bender VME420 User manual

Handbuch
DE
VME420
Voltage and frequency monitor
for monitoring AC/DC systems of 0…300 V, 15…460 Hz
for undervoltage, overvoltage, underfrequency, overfrequency
VME420_D00026_04_M_XXEN/09.2021 Manual EN

Bender GmbH & Co. KG
Postfach 1161 • 35301 Grünberg • Germany
Londorfer Str. 65 • 35305 Grünberg • Germany
Tel.: [phone] • Fax: [phone]
E-Mail: [e-mail] • www.bender.de
©Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission of the publisher.
Subject to change!
Photos: Bender archives

3
Table of Contents
VME420_D00026_04_M_XXEN/09.2021
1. Important information ................................................................................................ 7
1.1 How to use this manual ................................................................................................. 7
1.2 Technical support: service and support .................................................................. 8
1.2.1 First level support .................................................................................................... 8
1.2.2 Repair service ............................................................................................................ 8
1.2.3 Field service ............................................................................................................... 9
1.3 Training courses .............................................................................................................10
1.4 Delivery conditions ....................................................................................................... 10
1.5 Inspection, transport and storage ........................................................................... 10
1.6 Warranty and liability ................................................................................................... 11
1.7 Disposal ............................................................................................................................. 12
2. Safety instructions .................................................................................................... 13
2.1 General safety instructions ........................................................................................ 13
2.2 Work activities on electrical installations .............................................................. 13
2.3 Intended use ................................................................................................................... 14
3. Function ...................................................................................................................... 15
3.1 Device features ............................................................................................................... 15
3.2 Fast commissioning for Un = 230 V ........................................................................ 16
3.3 Function ............................................................................................................................ 17
3.4 Preset function ............................................................................................................... 17
3.5 Automatic self test ........................................................................................................ 18
3.6 Manual self test .............................................................................................................. 18
3.7 Functional fault .............................................................................................................. 18
3.8 Fault memory .................................................................................................................. 18
3.9 Assigning alarms to the alarm relays K/K2 ........................................................... 19
3.10 Time delays t, ton and toff .......................................................................................... 19
3.11 Password protection (on, OFF) ................................................................................. 19
3.12 Factory setting FAC ....................................................................................................... 20
3.13 Erasable history memory ............................................................................................ 20
3.14 Alarm LEDs show which relay is in the alarm state ........................................... 20
3.15 Starting a device using a simulated alarm S.AL .................................................. 20
3.16 Frequency alarm in case of measuring voltage failure ................................... 22

Inhaltsverzeichnis
4VME420_D00026_04_M_XXEN/09.2021
4. Installation and connection .................................................................................... 23
5. Operation and setting .............................................................................................. 26
5.1 Display elements in use .............................................................................................. 26
5.2 Function of the operating elements ...................................................................... 27
5.3 Menu structure .............................................................................................................. 28
5.4 Display in standard mode .......................................................................................... 30
5.5 Display in menu mode ................................................................................................ 31
5.5.1 Setting: response values for under-, overvoltage and hysteresis ........ 33
5.5.2 Setting: response values for under-, overfrequency, hysteresis .......... 35
5.5.3 Setting: fault memory and operating principle (alarm relays) ............. 36
5.5.4 Assigning alarm categories to the alarm relays ......................................... 38
5.5.5 Setting the time delays ....................................................................................... 40
5.5.6 Factory setting and password protection .................................................... 41
5.5.7 Restoring factory settings .................................................................................. 43
5.5.8 Manual activation of the preset function ..................................................... 43
5.5.9 Device information interrogation ................................................................... 44
5.5.10 History memory interrogation ......................................................................... 44
5.6 Preset function/ factory setting ............................................................................... 44
5.7 Commissioning ............................................................................................................. 45
6. Technical data VME420… ........................................................................................ 46
6.1 Data in tabular form .................................................................................................... 46
6.2 Standards, approvals and certifications ............................................................... 50
6.3 Ordering information .................................................................................................. 50
6.4 User settings (overview) ............................................................................................. 51
6.5 Change history .............................................................................................................. 52
INDEX ................................................................................................................................ 53

5
VME420_D00026_04_M_XXEN/09.2021
1. General instructions
1.1 How to use this manual
We have used the following symbols to identify important instructions and informa-
tion:
1.2 Technical support: service and support
For commissioning and troubleshooting Bender offers:
First level support
Technical support by phone or e-mail for all Bender products
•Questions about specific customer applications
•Commissioning
•Troubleshooting
Telephone: [phone]*
Fax: [phone]:-259 Germany: 0700BenderHelp (telephone and fax) E-
E-mail: [email protected]
This manual is intended for qualified personnel working in electrical en-
gineering and electronics!
This signal word indicates that there is a high risk of danger that will
result in death or serious injury if not avoided.
This signal word indicates a medium risk of danger that can lead to
death or serious injury, if not avoided.
This signal word indicates a low-level risk that can result in minor
or moderate injury or damage to property if not avoided.
This symbol denotes information intended to assist the user in making
optimum use of the product.
DANGER
WARNING
CAUTION

General instructions
6VME420_D00026_04_M_XXEN/09.2021
Repair service
Repair, calibration, update and replacement service for all Bender products
•Repair, calibration, testing and analysis
•Hardware and software update
•Delivery of replacement devices for faulty or incorrectly delivered devices
•Extended warranty with in-house repair service or replacement device at no extra cost
Telephone: [phone]** (technical issues)/
[phone]**, -785** (commercial issues)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:
Bender GmbH, Repair-Service, Londorfer Straße 65, 35305 Grünberg
Field service
On-site service for all Bender products
•Commissioning, parameter setting, maintenance, troubleshooting
•Analysis of the electrical installation in the building (power quality test, EMC test, thermog-
raphy)
•Practical training courses for customers
Telephone: [phone]**, -762 ** (technical issues)/
[phone]** (commercial issues)
Fax: [phone]
E-mail: [email protected]
Internet: www.bender.de
*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. - 4.00 p.m., Fr 7.00 a.m. - 1.00 p.m
1.3 Training courses
Bender provides training on how to use the universal measuring device.
Current dates of training courses and workshops can be found on the Internet at http://
www.bender.de -> Know-how -> Seminars.

General instructions
7
VME420_D00026_04_M_XXEN/09.2021
1.4 Delivery conditions, warranty and liability
The conditions of sale and delivery set out by Bender GmbH apply.
For software products, the "Softwareklausel zur Überlassung von Standard- Software
als Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen Lieferbedingun-
gen 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 Elec-
trical and Electronic Manufacturers' Association) also applies.
Conditions of sale and delivery can be obtained from Bender in printed or electronic for-
mat.
1.5 Inspection, transport and storage
Inspect the dispatch and equipment packaging for damage, and compare the contents
of the package with the delivery documents. In the event of damage in transit, please
contact Bender immediately.
The devices must only be stored in areas where it is protected from dust, humidity and
spray or dripping water, and in which the specified storage temperatures can be as-
sured.
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to property are
excluded if they can be attributed to one or more of the following causes:
•Improper use of the device.
•Incorrect mounting, commissioning, operation and maintenance of the device.
•Failure to observe the instructions in this operating manual regarding transport, com-
missioning, operation and maintenance of the device.
•Unauthorised changes to the device made by parties other than the manufacturer.
•Non-observance of technical data.
•Repairs carried out incorrectly and the use of replacement parts or accessories not
approved by the manufacturer.
•Catastrophes caused by external influences and force majeure.
•Mounting and installation with device combinations not recommended by the manu-
facturer.
This operating manual, especially the safety instructions, must be observed by all per-
sonnel working on the device. Furthermore, the rules and regulations that apply for ac-
cident prevention at the place of use must be observed.

General instructions
8VME420_D00026_04_M_XXEN/09.2021
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this device. Ask your
supplier if you are not sure how to dispose of the old equipment.
The directive on waste electrical and electronic equipment (WEEE directive) and the direc-
tive on the restriction of certain hazardous substances in electrical and electronic equip-
ment (RoHS directive) apply in the European Community. In Germany, these policies are
implemented through the "Electrical and Electronic Equipment Act" (ElektroG). According
to this, the following applies:
•Electric and electronic equipment are not to be included in household waste.
•Batteries and accumulators are not to be included in household waste but must be dis-
posed of in accordance with the regulations.
•Old electrical and electronic equipment from users other than private households which
was introduced to the market after 13th August 2005 must be taken back by the manufac-
turer and disposed of properly.
For more information on the disposal of Bender devices, refer to our website at
www.bender.de -> Service & support.

Safety instructions
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VME420_D00026_04_M_XXEN/09.2021
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the enclosed "Safety in-
structions for Bender products".
2.2 Work activities on electrical installations
If the device is used outside the Federal Republic of Germany, the applicable local
standards and regulations must be complied with.
2.3 Intended use
The voltage monitor VME420 monitors AC/DC systems in the frequency range DC/15…460
Hz for undervoltage, overvoltage, underfrequency and overfrequency. The devices are de-
signed for the nominal voltage range Un= 0…300 V. Separate supply voltage Us is required.
In order to meet the requirements of the applicable standards, customised parameter set-
tings must be made on the equipment in order to adapt it to local equipment and operating
conditions. Please heed the limits of the range of application indicated in the technical data.
Any use other than that described in this manual is regarded as improper.
Read the operating manual before starting to install, connect and
commission the device. After successful commissioning, keep the man-
ual within easy reach for future reference.
Only qualified personnel are permitted to carry out the work neces-
sary to install, commission and run a device or system.
DANGER
Risk of fatal injury from electric shock
Touching live parts of the system carries the risk of:
• A fatal electric shock
• Damage to the electrical installation
• Destruction of the device
Before installing the device and before working on the connections of
the device, make sure that the system is de-energised. The rules for
working on electrical systems must be observed.

Safety instructions
10 VME420_D00026_04_M_XXEN/09.2021

11
VME420_D00026_04_M_XXEN/09.2021
3. Function
3.1 Device features
•Undervoltage and overvoltage monitoring of AC/DC systems 0…300 V in the frequency
range DC/15…460 Hz
•Preset function: Automatic response value setting for undervoltage and overvoltage, <
U and > U as well as for underfrequency and overfrequency < f and > f.
•Voltage and frequency monitoring with window discriminator function, < U and > U as
well as < f and > f.
•Indication of the system frequency f
•Start-up delay, response delay and delay on release
•Adjustable switching hysteresis for U and f
•r.m.s. value measurement AC + DC
•Measured value display via multi-functional LC display
•Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
•N/C operation or N/O operation selectable
•Password protection against unauthorised parameter changing
•Fault memory can be deactivated. In the
"con“ mode, all alarm parameters remain stored on failure of the supply voltage.
•Start-up of the device with or without simulated alarm message
•Frequency alarm behaviour in case of measuring voltage failure can be parameterised
3.2 Function
Once the supply voltage is applied, the start-up delay "t" begins. Measured values changing
during this time do not influence the switching state of the alarm relays.
The devices provide two separately adjustable measuring channels
(overvoltage/undervoltage). If the measured value drops below the response value Alarm 2
or exceeds the response value (Alarm 1), the set response delays "ton 1/2" start. Once the re-
sponse delay has elapsed, the alarm relays switch and the alarm LEDs light up. If the meas-
uring value exceeds or falls below the release value (response value plus hysteresis) after the
alarm relays have switched, the selected delay on release "toff" starts. Once "toff" has elapsed,
the alarm relays switch back to their initial position. If the fault memory is enabled, the alarm
relays remain in alarm state until the reset button R is pressed.

Function
12 VME420_D00026_04_M_XXEN/09.2021
3.3 Fast commissioning for Un= 230 V
If you are already familiar with voltage monitors, you can reduce the time for commissioning
and connection using this brief description.
1. Check that the system being monitored is operated with a nominal voltage of Un=
230 V and 50 Hz. This is the precondition for an automatic setting of the response
values (Preset) after the first connection to the nominal voltage.
2. Make sure that the voltage monitor is in the delivery status (factory setting has not
been changed). In case of doubt, restore the factory setting (page 32).
3. When the conditions 1 and 2 are satisfied, you can connect the voltage monitor to
the three-phase system to be monitored according to the wiring diagram (page 18).
The following predefined response values will be set automatically:
4. The currently measured voltage between the terminals U1/+ and U2/- appears on
the display. In addition, you can query the system frequency f using the Up and
Down key when AC voltage is applied.
For detailed information about the preset function and other voltage ranges refer to page 12;
page 33 provides a summary of all factory settings.
If you want to reset the voltage monitors to factory settings, refer to page 32.
3.4 Preset function
After connecting the system to be monitored for the first time, the response values for overvolt-
age and undervoltage (Alarm 1/2) are automatically set once to:
Response value overvoltage ( > U): 1.1 Un
Response value undervoltage ( < U): 0.85 Un
Response value overfrequency ( > f) at 16.7 Hz, 50 Hz, 60 Hz: fn+ 1 Hz
Response value overfrequency ( > f) at 400 Hz: fn+ 1 Hz
Response value underfrequency ( < f) at 16.7 Hz, 50 Hz, 60 Hz: fn- 1 Hz
Response value underfrequency ( < f) at 400 Hz: fn- 1 Hz
VME420
Un, fnoperating range Response value < U, < f Response value > U, > f
230 V 196…253 V 196 V 253 V
50 Hz 47…53 Hz 49 Hz 51 Hz

Function
13
VME420_D00026_04_M_XXEN/09.2021
If the measured voltage is not within the preset operating range listed in the table, the mes-
sage "AL not Set“ appears on the display. Therefore it is necessary to set the response values
for Alarm 1 (AL1) and Alarm 2 (AL2) manually. A detailed description of the process is given
in the chapter "parameter setting“.
After restoring the factory settings, the preset function is automatically active again.
During operation, the preset function can be started manually via the menu SEt.
3.5 Automatic self test
The device automatically carries out a self test after connection to the system to be moni-
tored and later every hour. During the self test internal functional faults are detected and ap-
pear in form of an error code on the display. The alarm relays are not checked during this test.
3.6 Manual self test
After pressing the internal test button for > 1.5 s, a self test is performed by the device. Dur-
ing this test, internal functional faults are determined and appear in form of an error code on
the display. The alarm relays are not checked during this test.
While the test button T is pressed and held down, all device-related display elements appear
on the display.
3.7 Functional fault
If there is an internal functional fault, all three LEDs flash. The display shows an error code
(E01…E32). In such a case please contact the Bender Service.
3.8 Fault memory
The fault memory can be activated, deactivated or can be set to continuous mode (con). If
the fault memory is set to "con“ mode, the alarm parameters remain stored even on failure
of the supply voltage.
Presets VME420
UnOperating range Response value < U Response value > U
230 V 196…253 V 196 V 253 V
120 V 102…132 V 102 V 132 V
60 V 51…66 V 51 V 66 V
24 V 20.4…26.4 V 20.4 V 26.4 V

Function
14 VME420_D00026_04_M_XXEN/09.2021
3.9 Assigning alarms to the alarm relays K1/K2
Different alarm categories can be assigned to the alarm relays K1/K2 via the menu "out".
3.10 Time delays t, ton and toff
The times t, ton and toff described below delay the output of alarms via LEDs and relays.
Start-up delay t
Once the supply voltage Ushas been switched on, the alarm indication is delayed by the preset
time t (0…300 s).
Response delay ton
When the value drops below or exceeds the response value, the voltage monitor requires the
response time tan until the alarm is activated.
A preset response delay ton (0…300 s) adds up to the device-related operating time tae and de-
lays alarm signalling (total delay time tan = tae + ton).
If the fault no longer exists during the response delay, the alarm signal drops out.
Delay on release toff
If the alarm no longer exists during the response delay and the fault memory is deactivated, the
alarm LEDs will go out and the alarm relays switch back to their initial position. The delay on re-
lease (0…300 s) serves to maintain the alarm state signal for the set duration.
3.11 Password protection (on, OFF)
With the password protection activated (on), settings are only possible after entering the cor-
rect password (0…999). If you cannot operate your device because you cannot remember your
password, please contact [email protected].
3.12 Factory setting FAC
After activating the factory setting, all settings previously changed are reset to delivery status.
In addition, the preset function allows automatic adaptation of the response values in relation
to the nominal voltage Un.
3.13 Erasable history memory
The first alarm value that occurs will be stored in this memory.
Subsequent alarms do not overwrite this "old" value. The memory can be cleared using the Clr
key in the menu HiS.

Function
15
VME420_D00026_04_M_XXEN/09.2021
3.14 Alarm LEDs show which relay is in the alarm state
When the menu item LEd is activated, the alarm LED AL1 indicates that K1 is in the alarm
state. When AL2 lights up, K2 is in the alarm state. An alarm relay cannot switch to the alarm
state unless an alarm category has been assigned to it.
When the menu item LEd is deactivated, AL1 signals overvoltage, AL2 signals undervolt-
age, both LEDs AL1 and AL2 light up in case of frequency alarm.
For details about alarm category assignment to the respective relays refer to the submenu
out description on page 21.
3.15 Starting a device using a simulated alarm S.AL
If the menu item S.AL has been activated in the out menu, K1 resp. K2 switches back to the
alarm state once the supply voltage is applied. This alarm state is maintained for the set du-
ration t+ ton1. Once this time has elapsed, K1 resp. K2 switches back to the initial position
provided that no fault is detected at the measuring input.
The following diagrams show the effect of a fault during a simulated alarm.
Faults at the measuring input and the resulting condition of the alarm relay K1 (K2) are
shown as a hatched area.
The fault for K1 shown in the time diagram below, by way of example, has started during the
S.AL phase:
The fault for K1 shown in the time diagram below, by way of example, started when the S.AL
phase has elapsed:
t
on1
t
t
on1
S.AL
U
F
U
N
K1
t
on1
t
ton1
S.AL
UF
UN
K1

Function
16 VME420_D00026_04_M_XXEN/09.2021
3.16 Frequency alarm in case of measuring voltage failure
(Menu -> AL -> <U Hz)
If the voltage of the monitored system falls to the point where the frequency can no longer be
determined, this parameter is used to set how the frequency alarm should behave.
On: The device sets the underfrequency/overfrequency alarm (factory setting).
Off: The device does not set a frequency alarm.
Note for <U Hz = Off:
If there are transients (depending on circuit breakers and system
parameters) when the voltage of the monitored system fails or re-
turns, the device may still briefly output a frequency alarm.
To avoid this behaviour, the relay to which frequency alarms are
assigned must be delayed by means of ton1 or ton2 and toff.
If the frequency of the monitored system slowly returns (e.g. due
to a starting generator), the frequency monitoring only becomes
active when the frequency is within specified limits (≥10 Hz).

Installation and connection
17
VME420_D00026_04_M_XXEN/09.2021
4. Installation and connection
General dimension diagram and drawing for screw fixing
The front plate cover is easy to open at the lower part identified by an arrow.
Only qualified personnel are permitted to carry out the work
necessary to install, commission an
d run a device or system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
•An electric shock
•Damage to the electrical installation
•Destruction of the device
Before installing and connecting the device, make sure that
the installation has been de-energised. Observe the rules for
working on electrical installations.
Application in railway vehicles/DIN EN 45545-2:2016!
If the horizontal or vertical distance to adjacent components
which do not meet the requirements in table 2 of DIN EN 45545-2
is less than 20 mm or less than 200 mm respectively, they are to be
regarded as grouped. Refer to DIN EN 45545-2 chapter 4.3 Grou-
ping rules.
DANGER
90 mm
45
67,5
36 mm
31,1
47,5
70,5
2
2
100 mm
116 mm
Zubehör/
Accessory

Installation and connection
18 VME420_D00026_04_M_XXEN/09.2021
1. DIN rail mounting:
Snap the rear mounting clip of the device into place in such a way that a safe and
tight fit is ensured.
2. Screw fixing:
Use a tool to move the rear mounting clips (a second mounting clip is required, see
ordering information) to a position that it projects beyond the enclosure. Then fix
the device using two M4 screws.
Wiring
Connect the device according the wiring diagram.
Terminal Connections
A1, A2 Connection of supply voltage Us
U1/+, U2/- Connection to the system to be monitored
11, 12, 14 Alarm relay K1
21, 22, 24 Alarm relay K2
Please connect the conductor to the push-wire
terminals as illustrated in the schematic
diagram on the left.
U1/+
U2/-
U
n
A1
A2
Us
A1
~/~/+
6A 6A
IT-System
A2
1
2
3

19
VME420_D00026_04_M_XXEN/09.2021
5. Operation and setting
5.1 Display elements in use
The meaning of the display elements in use is listed in detail in the table below.
Display elements Element Function
< U,
> U
Undervoltage (Alarm 2),
overvoltage (Alarm 1)
R1, r1,
R2, r2
Alarm relay K1,
Alarm relay K2
U Hys, % Response value hysteresis as %
< Hz,
> Hz
Underfrequency (AL1 and AL2)
Overfrequency (AL1 and AL2)
Hz Hys Frequency response value hysteresis as Hz
ton1,
ton2,
T,
toff
Response delay ton1 (K1),
Response delay ton2 (K2)
Start-up delay t,
Delay on release toff for K1, K2
MFault memory active
Operating mode of the relays K1, K2;
resp. LEDs AL1/AL2 indicate the alarm state
of K1/K2
Password protection active

Operation and setting
20 VME420_D00026_04_M_XXEN/09.2021
5.2 Function of the operating elements
Device front Element Function
ON Power On LED, green
AL1,
AL2
Menu item LEd deactivated:
LED Alarm 1 lights (yellow):
Response value > U reached
LED Alarm 2 lights (yellow): Response
value < U reached
AL1 and AL2
Menu item LEd deactivated:
Both LEDs light when the frequency res-
ponse values > Hz or < Hz are reached.
AL1,
AL2
Menu item LEd activated:
LED Alarm 1 lights (yellow):
K1 signals an arbitrary alarm
LED Alarm 2 lights (yellow):
K2 signals an arbitrary alarm
225 V,
M
Display in standard mode: Un= 225 V;
Fault memory active
T, Test button (> 1.5 s):
Indication of the useable display elements,
starting a self test;
Up key (< 1.5 s):
Menu items/values
R, Reset button (> 1.5 s):
Deleting the fault memory;
Down key (< 1.5 s):
Menu items/values
MENU, MENU key (> 1.5 s):
Starting the menu mode;
Enter key (< 1.5 s):
Confirm menu item, submenu item and
value.
Enter key (> 1.5 s):
Back to the next higher menu level.
ON AL1 AL2
T MENU R