janitza UMG 103 Service manual

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A
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Doc No. 1.036.019.g
Power Analyser
UMG 103
Installation and Putting into Service
Product No. 33.03.071
Janitza electronics GmbH
Vor dem Polstück 1
D-35633 Lahnau
Support tel. [phone]
Fax [phone]
E-mail: [email protected]
Internet: http://www.janitza.com
www.janitza.com

2
UMG 103
General Information 4
Copyright 4
Protected trademarks 4
Liability disclaimer 4
Comments on the manual 4
Meaning of the symbols used 5
Inspection on receipt 6
Scope of supply 7
Available accessories 7
Notes on Use 8
Product Description 10
Intended use 10
Features 11
Operating concept 12
GridVis programming software 12
Installation 14
Installed position 14
Power supply voltage 15
Voltage measurement 16
Current measurement 18
Ammeter 19
Direct measurement 19
RS485 interface 22
What to do in case of errors 24
Service and maintenance 26
Repair and calibration 26
Front film 26
Firmware update 26
Service 26
Technical specifications 28
Transport and storage 28
Ambient conditions during operation 28
General information 28
RS485 interface 29
Measurement uncertainty 30
Measurement 32
Voltage measurement 32
Current measurement 32

3
UMG 103
Appendix 33
Declaration of conformity 33
Dimensioned drawings 34
UMG103 connection example 35
Measuring-circuit and power supply voltage 35
Current measurement 35
Quick Reference Instructions 36
Device address 36
LED display 36

4
UMG 103
General Information
Copyright
This manual is subject to the statutory copyright protection provisions and may
not be photocopied, reprinted, reproduced as a whole or in parts, by mechanical
or electronic means, nor copied or further published in any other way whatsoever
without the legally binding, written consent of
Janitza electronics GmbH,
Vor dem Polstück 1,
D 35633 Lahnau,
Germany.
Protected trademarks
All trademarks and their resulting rights belong to the respective holders of these
rights.
Liability disclaimer
Janitza electronics GmbH does not accept any responsibility whatsoever for errors
or deficiencies within this manual and does not undertake any obligation to keep
the content of this manual up to date.
Comments on the manual
We welcome your comments. If anything in this manual seems unclear to you,
please let us know by sending an eMail to: [email protected]

5
UMG 103
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Meaning of the symbols used
The following pictograms are used in this manual:
Dangerous voltage!
Danger or risk of severe injury.
Disconnect the system and
device from the power supply
before starting the work.
PE (protective earth) terminal.
Important!
Please note and follow the
documentation. This symbol
is intended to warn you of pos-
sible hazards that can occur
during installation, starting up
and use.

6
UMG 103
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m
m
The installation and start-up
instructions also describe options
which do not belong to the scope
of supply.
Inspection on receipt
Fault free and safe use of this device requires appropriate transport, proper storage,
erection and assembly as well as careful operation and maintenance. If it can be
assumed that safe operation is no longer possible, the device must be immediately
taken out of service and secured against being accidentally started up.
The device must be unpacked and packed with the usual care, without the use
of force and only using suitable tools. The devices must be visually inspected for
perfect mechanical condition. Please also note and follow the installation instructions
enclosed with the device.
It can be assumed that safe operation is no longer possible if the device, e.g.
• has visible damage,
• no longer works, despite intact mains power supply,
• has been exposed to unfavourable conditions (e.g. storage outside the permissible
climatic limits without adjustment to the ambient climate, condensation, or similar)
for a lengthy period or was exposed to unfavourable effects or loads during
transport (e.g. fall from a large height even if there is no visible external damage,
or similar).
Please check the scope of supply for completeness before you start installing the
device.
All screw-type terminals
belonging to the scope of supply
are plugged into the device.
All supplied options and design
versions are described on the
delivery note.

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UMG 103
Scope of supply
Product No. Name
18 08 094 RS485, external terminating resistor, 120 Ohm
1) Refer to delivery note for product number.
2) Design version.
Available accessories
Number Product No. Name
1 52 18 xxx1) UMG103 XX2)
1 33 03 071 Installation and start-up instructions.
1 51 00 116 CD with the following content:
- “GridVis” programming software,
- Functional description,
- Supplementary device descriptions.
1 1001818 Plug-in screw-type terminal, 2-pin.
1 1001819 Plug-in screw-type terminal, 4-pin.
1 1001820 Plug-in screw-type terminal, 6-pin.

8
UMG 103
Notes on Use
Please read these operating instructions and all other publications which have to
be used to work with this product (in particular for installation, operation or main-
tenance).
Note and follow all safety instructions as well as any warnings. If you do not follow the
instructions, personal injuries and/or damage to the product could be the result.
Any unauthorised change or use of this device which extends beyond the given
mechanical, electrical or other operating limits can cause personal injuries and/or
damage to the product.
Any such unauthorised change is “misuse” and/or “negligence” under the prod-
uct's warranty and therefore excludes the warranty for cover of possible resulting
injuries or damage.
This device may be solely operated and maintained by skilled persons.
Skilled persons are people who, on the basis of their relevant training and experi-
ence, are capable of identifying risks and avoiding possible hazards which operation
or maintenance of the device can cause.
When using the device, any additional legal and safety regulations required for the
respective use must be observed.

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UMG 103
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Important!
If the device is not operated
according to the instruction
manual, protection is no longer
ensured and the device can
cause hazards.
Conductors with soldered in-
dividual wires are not suitable
for connection to screw-type
terminals.
Only pluggable screw terminals
with the same number of poles
(pins) and of the same type may
be plugged together.
m
The UMG103 is programmed
and read out via RS485 inter-
face only.

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UMG 103
Product Description
Intended use
The UMG103 is intended to be used for the measurement and calculation of
electrical variables such as voltage, current, power, work, harmonic components,
etc. in building installations, at distribution boards, circuit-breakers and busbar
trunking systems.
The UMG103 is permanently installed in control cabinets or small distribution
boards. It can be installed in any position. The measurement results can be read
out via the RS485 interface.
The UMG103 draws its power supply voltage from the measuring-circuit voltage.
The UMG103 is designed for operation in low-voltage distribution systems, in which
overvoltage category III (300 V) impulse voltages can occur.
The UMG103 can measure L-N voltages of up to 240 V and short-term overvoltages
up to 300 Vrms.
The current measurement inputs of the UMG103 are connected via external ../1A
or ../5A current transformers.
The UMG103 is only conditionally suitable for measurements in medium and
high-voltage distribution systems, as it draws the power supply voltage from the
measuring-circuit voltage and therefore loads the voltage transformer with a non-
linear current. Special safety provisions are to be applied to the measurements in
medium and high-voltage distribution systems, which are not dealt with here.
The UMG103 fulfils the test requirements for use in industrial areas.
The UMG103 bridges power failures of max 80 ms with a mains voltage of
230 V AC.
The UMG103 saves all min-, max-, energy values as well as runtime counters in a
non-volatile memory approximately every 5 minutes.
The refresh time of the measured values depends on the set net frequency (at 50Hz:
200ms; at 60Hz: 167ms).

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UMG 103
Features
- Measurement in TN and TT systems,
- 3 voltage measurement inputs (300V CATIII),
- 3 current measurement inputs,
- RS485 (Modbus RTU),
- Installation on top-hat rails, 4,TE
- Suitable for installation in distribution boards.
- Continuous scanning of the voltage and current measurement inputs,
- E nergy measurement, measurement uncertainty class 0.5 for ../5A current transformers,
- E nergy measurement, measurement uncertainty class 1 for ../1A current transformers,
- Fourier analysis 1st to 25th harmonic component (all uneven harmonics) for U and I,
- THD U, THD I,
- Measurement of the distortion reactive power,
- Measurement of positive, negative and zero phase-sequence system,
- Storage of the minimum, maximum and energy values,
- Scanning frequency 5.4 kHz.

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UMG 103
B A
Operating concept
The UMG103 is programmed and read out via the RS485 interface only. The device
address is directly set via 2 coding switches.
GridVis programming software
The UMG103 can be programmed and read out using the GridVis programming
software included in the scope of supply. To this end the UMG103 must be connected
to a PC via the RS485 interface.
GridVis features
- Programming the UMG103
- Storing data in a database
- Graphic display of measured values.
Connection
Current
measurement
Red LED
Green LED
Connection of
the measurement
and power supply
voltage
RS485
interface
Setting the
device address
Fig.: View of the UMG103.

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UMG 103
UMG
604
UMG
103
UMG
103
RS485
Switch
PC
Ethernet
Ethernet
PC
RS232
RS485
UMG
103
UMG103
230/400V 50/60Hz
PE
L2
L3
N
L1
4M
4M
4M
4M
DC
L1 L3L2 N
AC
Fig. Connection of a UMG103 to a PC
via an interface converter.
Interface
converter
Fig. block diagram, UMG103 in TN
system.
Power supply
voltage
Voltage
measurement
Block diagram of measurement and
power supply voltage
Fig. Connection of several UMG103 to
a PC via a UMG604 (with the ethernet
option).
Earthing
the
system

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UMG 103
B A
Installation
Installed position
The UMG103 can be installed in control
cabinets or in small distribution boards
according to DIN 43880. It is mounted
on a 35 mm mounting rail according to
DIN EN 60715. It can be installed in any
position..
Fig. UMG103 on mounting rail according
to DIN EN 60715.
Mounting rail

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UMG 103
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Power supply voltage
The power supply voltage required for
operation of the UMG103 is drawn from
the L1-N, L2-N and L3-N measuring-
circuit voltages. At least one phase must
lie within the rated voltage range.
The UMG103 requires a voltage of at
least 100 Veff in at least one phase (L-N)
to operate.
The connection leads for the measuring-
circuit and power supply voltage must be
routed via a disconnector and protected
with a fuse.
Important!
- A disconnector or circuit-
breaker must be provided for
the measuring-circuit and power
supply voltage in the building
installation.
- The disconnector must be
installed near the device and
must be easy for the user to
reach.
- The switch must be labelled
as a disconnecting device for
this device.
Voltages which are above the
allowable voltage range can
destroy the device.
Before applying the measuring-
circuit and power supply
voltage, ensure that the voltage
and frequency matches the
information given on the rating
plate!

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UMG 103
c
B A
L3
N
L1
L2
Voltage measurement
The UMG103 is designed for operation
in low-voltage distribution systems, in
which overvoltage category III (300 V)
impulse voltages can occur.
The UMG103 can measure L-N voltages of
up to 240 V and short-term overvoltages
up to 300 Vrms.
The UMG103 can be used in three-phase 4
conductor system (TN, TT system) (50 Hz,
60 Hz) with earthed PEN conductor.
The UMG103 draws the power supply
voltage required for operation from the
measuring-circuit voltage.
The instrument leads required for the
voltage measurement must be suitable
for voltages up to 300 VAC to earth and
520 VAC conductor to conductor.
Instrument leads must be fused by an
overcurrent protective device and routed
via disconnectors.
The UMG103 is only conditionally
suitable for measurements in medium
and high-voltage distribution systems,
as it draws the power supply voltage
from the measuring-circuit voltage and
therefore loads the voltage transformer
with a non-linear current.
Fig.16.1 Connection example: Voltage
measurement via disconnectors and
fuses.
Disconnector
Fuse (6A type C)
Important!
The voltage measurement inputs
are hazardous live!

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UMG 103
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UL-N / UL-L
120V / 208V
127V / 220V
220V / 380V
230V / 400V
240V / 415V
Important!
The UMG103 is not suitable
for the measurement of direct
voltages.
Important!
Voltages above 240 VAC to earth
must be connected via voltage
transformers.
Fig.17.2 Connection example for voltage
measurement via voltage transformer.
Fig.17.1 Connection example for direct
voltage measurement.
Fig.17.3 Table of the suitable rated
voltages.
Max. rated voltage
Voltage
Voltage

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UMG 103
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S2
S1
L3
L1
L2
S2
S1
S2 S1
c
B A
Current measurement
The UMG103 is designed for the con-
nection of current transformers with
secondary currents of ../1A and ../5A.
Only alternating currents, not direct
currents, can be measured.
Each current measurement input can
be permanently loaded with 6A or for
1 second with 100 A.
Current transformers, which are not
loaded on the secondary side can con-
duct dangerous contact voltages and
therefore must be short-circuited.
The current transformer ratio can be pro-
grammed via RS485 using the software
GridVis only.
The current transformer ratio is set to
5/5A in our factory and must be adapted
to the used current tranformers.
Earthing current transformers.
If a connection is provided for
earthing the secondary winding,
this must be connected with
earth.
Fig.18.1 Connection example, current
measurement via current transformer.
Important!
The UMG103 is not suitable
for the measurement of direct
voltages.
Loads
Important!
The current measurement inputs
are hazardous live!

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UMG 103
Fig.19.1 Example, current measurement
via additional ammeter.
Ammeter
If you not only want to measure the current
with the UMG103 but with an ammeter
also, the ammeter must be connected
in series to the UMG103.
Direct measurement
Nominal currents up to 5 A can also be
measured directly with the UMG103.
In this case it must be noted that each
current measurement input may be loaded
continuously with 6 A or for 1 second
with max 100 A.
As the UMG103 does not have any
integrated protection for the current
measurement, this protection (e.g. 6A
fuse type C) must be provided for during
installation.
Fig. 19.2 Example, direct current meas-
urement.

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UMG 103
Fig.20.1 Example, current measurement
via summation current transformers.
Example
The current is measured via two current
transformers. Both current transformers
have a transformation ratio of 1000/5A.
The summation measurement is performed
with a 5+5/5A summation current
transformer.
Primary current: 1000A + 1000A = 2000A
Secondary current: 5A
The UMG103 must then be set as
follows:
Address 000 = 2000 (primary current)
Address 001 = 0005 (secondary current)
Summation current measurement
If the current is measured via two current
transformers, the total transformation
ratio of the current transformers must
be programmed in the UMG103.