Bender VMD421H User manual

Manual
EN
VMD421H
Voltage and frequency monitor for undervoltage, overvoltage,
underfrequency and overfrequency monitoring
in 3(N)AC systems of 70...500 V
Software version D239 V2.3x
VMD421H_D00138_02_M_XXEN.pdf/06.2021 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 archive and Bendersystembau archive

3
Table of content
VMD421H_D00138_02_M_XXEN.pdf/06.2021
1. Important information ................................................................................................ 5
1.1 How to use this manual ................................................................................................. 5
1.2 Technical support: service and support .................................................................. 5
1.2.1 First level support .................................................................................................... 5
1.2.2 Repair service ............................................................................................................ 6
1.2.3 Field service ............................................................................................................... 6
1.3 Training courses ............................................................................................................... 6
1.4 Delivery conditions ......................................................................................................... 7
1.5 Inspection, transport and storage ............................................................................. 7
1.6 Warranty and liability ..................................................................................................... 7
1.7 Disposal ............................................................................................................................... 8
2. Safety instructions ....................................................................................................... 9
2.1 General safety instructions .......................................................................................... 9
2.2 Work activities on electrical installations ................................................................ 9
2.3 Intended use ..................................................................................................................... 9
3. Function ...................................................................................................................... 11
3.1 Device features ............................................................................................................... 11
3.2 Functional description ................................................................................................. 11
3.3 Fast commissioning for Un = 400 V, 50 Hz ........................................................... 12
3.4 Preset function ............................................................................................................... 13
3.5 Automatic self test ........................................................................................................ 13
3.6 Manual self test .............................................................................................................. 14
3.7 Malfunction ..................................................................................................................... 14
3.8 Fault memory .................................................................................................................. 14
3.9 Assigning alarms to alarm relays K1/K2 ................................................................ 14
3.10 Delay times t, ton and toff .......................................................................................... 14
3.11 Password protection (on, OFF) ................................................................................. 15
3.12 Factory settings FAC ..................................................................................................... 15
3.13 Erasable history memory ............................................................................................ 15
3.14 Alarm LEDs show which relay is in the alarm state ........................................... 15
3.15 Starting the device with a simulated alarm S.AL ............................................... 15
3.16 Frequency alarm in case of measuring voltage failure .................................... 16
4. Installation and connection .................................................................................... 17

Inhaltsverzeichnis
4VMD421H_D00138_02_M_XXEN.pdf/06.2021
5. Wiring .......................................................................................................................... 19
6. Operation and settings ............................................................................................ 21
6.1 Display elements in use .............................................................................................. 21
6.2 Function of the operating elements ...................................................................... 22
6.3 Menu structure .............................................................................................................. 23
6.4 Display in standard mode .......................................................................................... 24
6.5 Display in menu mode ................................................................................................ 25
6.5.1 Parameter query and setting: overview ....................................................... 25
6.5.2 Setting the response values for undervoltage and overvoltage ......... 27
6.5.3 Setting the response values for underfrequency, overfrequency and
hysteresis ................................................................................................................. 28
6.5.4 Setting the fault memory and operating mode of the alarm relays .. 29
6.5.5 Assigning alarm categories to the alarm relays ......................................... 30
6.5.6 Setting delay times ............................................................................................... 33
6.5.7 Select measurement method ........................................................................... 34
6.5.8 Factory setting and password protection .................................................... 34
6.5.9 Restoring factory settings .................................................................................. 35
6.5.10 Manual activation of the preset function ..................................................... 35
6.5.11 Querying device information ........................................................................... 36
6.5.12 Querying the history memory .......................................................................... 36
6.6 Commissioning ............................................................................................................. 36
6.7 Preset function/Factory settings ............................................................................. 37
7. Technical data VMD421H ......................................................................................... 39
7.1 Tabular data .................................................................................................................... 39
7.2 Standards, approvals and certifications ............................................................... 42
7.3 Ordering information .................................................................................................. 42
7.4 Change log ...................................................................................................................... 42
INDEX ................................................................................................................................ 43

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VMD421H_D00138_02_M_XXEN.pdf/06.2021
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
To make it easier for you to understand and revisit certain sections in this manual, we
have used symbols to identify important instructions and information. The meaning of
these symbols is explained below:
1.2 Technical support: service and support
For commissioning and troubleshooting Bender offers:
1.2.1 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]
In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [email protected]
This manual is intended for qualified personnel working in electrical
engineering 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

Important information
6VMD421H_D00138_02_M_XXEN.pdf/06.2021
1.2.2 Repair service
Repair, calibration, update and replacement service for Bender products
•Repair, calibration, testing and analysis of 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 or replacement
devices 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
1.2.3 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, ther-
mography)
•Practical training courses for customers
Telephone: [phone]**, -762 **(technical issues)
[phone]** (commercial issues)
Fax: [phone]
E-mail: [email protected]
Internet: www.bender.de/en
*Available from 7.00 am to 8.00 pm on 365 days of the year (CET/UTC+1)
**Mo-Thu 7.00 am - 8.00 pm, Fr 7.00 am - 13.00 pm
1.3 Training courses
Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at www.ben-
der.de/en -> Know-how -> Seminars.

Important information
7
VMD421H_D00138_02_M_XXEN.pdf/06.2021
1.4 Delivery conditions
The conditions of sale and delivery set out by Bender 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 assu-
red.
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, ust be observed by all persons
working with the device. Furthermore, the rules and regulations that apply for accident
prevention at the place of use must be observed.

Important information
8VMD421H_D00138_02_M_XXEN.pdf/06.2021
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 di-
rective on the restriction of certain hazardous substances in electrical and electronic
equipment (RoHS directive) apply in the European Community. In Germany, these poli-
cies 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
manufacturer and disposed of properly.
For more information on the disposal of Bender devices, refer to our homepage at
www.bender.de/en -> Service & support.

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VMD421H_D00138_02_M_XXEN.pdf/06.2021
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 stan-
dards and regulations must be complied with. The European standard EN 50110 can be
used as a guide.
2.3 Intended use
The voltage monitor VMD421H monitors 3(N)AC systems in the frequency range of
15…460 Hz for undervoltage, overvoltage, underfrequency and overfrequency.
The devices are designed for the nominal voltage range Un = 70…500 V. The device is
internally supplied by the nominal voltage Unto be monitored.
In order to meet the requirements of the applicable standards, customised parameter
settings must be made on the equipment in order to adapt it to local equipment and
operating conditions. Please heed the limits of the area of application indicated in the
technical specifications.
Any other use than that described in this document is regarded as improper.
Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.
Risk of fatal injury 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 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.
DANGER

Safety instructions
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