Janitza UMG96L User guide

Universal Measuring Device

L1-N / L1-L2
L2-N / L2-L3
L3-N / L3-L1

UMG96L

Operating Instructions

Brief instructions see last page

Mean value

Programming mode
Sum measurement
Phase to phase

Password
Voltage transformer
Current transformer

Peak value Minimum value

Dok Nr. 1.031.014.0

Supply

Key 1 Key 2

Janitza electronics GmbH

Vor dem Polstück 1
D-35633 Lahnau
Support Tel. [phone]
Fax [phone]
e-mail: [e-mail]
Internet: http://www.janitza.de

Table of contents

The meaning of symbols 3
Hints for the user 3
Receipt control 3

Contents of delivery 3

Hints for maintenance 4

Service 4

Product description 5

Intended use 5
Functional description 5

Installation 6

Mounting place 6
Measuring and operating voltage 6
Current measurement 7
Sum current measurement 7
Connecting options 8

Putting into service 10

Installation 10
Attach measuring and operating voltage 10
Connect measuring current 11
Check phase assignment 11
Check current direction 11
Check measurement 11
Check phase power 11
Check sum power 11

Elimination of errors 12
Error messages 13

Usage and indication 14

Indication mode 14
Programming mode 14
Key functions 15
Table, measured value indication 16
Current transformer 18
Voltage transformer 19
Averaging times 20
Measured value indication 21

Measured value rotation time 21

Measured value selection 22
Delete minimum and maximum values 23
Delete energy 23
Working hours counter 24
LCD contrast 24
Software Release 25
User password 25

Uncertainty of measurement 26
Configuration data 28
Declaration of conformity 29

Safety guidelines 29
Test voltage 29
EMC requirements 29

Technical data 30

Ambient conditions 30
Measurement 30
Connectable cables 30
Dimensions 31
Connection example 31

Brief instructions 32

Change current transformer ratio 32
Call up measured values 32

All rights reserved. No part of this manual may
be reproduced or duplicated without the written
permission of the author. Any contraventions
are punishable and will be prosecuted with all
legal means.
No liability can be taken for the faultless condi­tion of the manual or damage caused by the
use of it. As failures cannot be avoided com­pletely, we shall be very grateful for any advice.
We are anxious to remove all failures as soon
as possible. The mentioned software and hard­ware descriptions are registered trademarks in
the most cases and are subject to the regula­tions by law. All registered trademarks are prop­erty of the corresponding companies and are
fully recognized by us.

Page 2

Issue Note

13.01.2004 First Edition.

The meaning of symbols

Receipt control

The symbols, which are used in this manual,
have the following meaning:

Beware of dangerous electrical voltage.

Ꮨ


Hints for the user

This device may be inserted and used by quali­fied personnel only according to the safety
regulations. Please follow the legal and safety
regulations for the corresponding application
while using the device.
Qualified personnel are persons, who are famil­iar with installation, mounting, putting into serv­ice and operation of the product and have quali­fications according to their occupation, for ex­ample:

- Education or instruction resp. the right to
switch on or off, ground or characterize current
circuits or devices according to the standards
of safety techniques.

- Education or instruction in care and use of
safety equipment according to the standard
safety techniques.

This symbol shall warn you about possi­ble danger, which can occur during instal­lation, putting into service and usage.

In order to ensure a perfect and safe use of the
device, a proper transport, expert storage, erec­tion and mounting and careful usage and main­tenance is required. In case that a safe opera­tion can no longer be granted, the device has
to be put out of service and has to be protected
against unintentional putting into service.
A safe operation can no longer be assumed, if
the device

• shows visible damage,

• does not work in spite of intact net supply,

• has been exposed to disadvantageous condi­tions for a longer time (e.g. storage beyond al­lowed climate without adaption to the room cli­mate, dew etc.) or transport use (e.g. falling
from great height, even without visible dam­age).

Please test the contents of delivery for comple­tion, before starting the installation of the de­vice.

Contents of delivery

1 pc. UMG96L,
2 pcs. fixing brackets,
1 pc. manual.
As an option, a seal with part no. 29.01.907 can
be delivered.

All delivered options and versions are listed on
the delivery papers.



Ꮨ

Attention!

If the device is not used according to this
manual, a safe use cannot be granted,
and the instrument might cause danger.

Attention!

If a UMG 96L is installed in panels of
metal, the panel must be earthed.



This manual also describes options,
which have not been delivered and do
not belong to the contents of delivery.

Page 3

Hints for maintenance

Before delivery the device is tested in various
safety checks and marked with a seal. If the
device is opened, these checks must be re­peated.
For instruments, which are opened outside the
manufacturing works, no warranty is granted
whatsoever.

Repairing and calibration

Repairing and calibration work can be carried
out in the manufacturing works only.

Front foil

The cleaning of the front foil has to be effected
with a soft cloth using a common cleansing
agent. Acid or acidic agents are not allowed for
cleaning.

Service

If there are questions, which are not described
in this manual, please contact us directly.
For an efficient handling we need the following
information:

- Description of device (see type plate),

- Serial digit (see type plate),

- Software Release,

- Measuring and operating voltage and

- detailed description of error.

You can reach us:
Monday until Thursday

between 07:00 and 15:00

and Friday

between 07:00 and 12:00

Waste management

The UMG96L can be disposed and recycled as
electronical waste according to the legal regu­lations.

Janitza electronics GmbH
Vor dem Polstück 1
D-35633 Lahnau
Support: Tel. [phone]
Fax [phone]
e-mail: [e-mail]
Internet: http://www.janitza.de

Page 4

Product description

Intended use

The UMG96L is suitable for fix mounting and
the measurement of voltage, current, power
etc. in low voltage switchgear. The measure­ment is designed for 3 phase systems with neu­tral conductor (TN and TT-mains).
The UMG96L is suitable for mounting in fix and
weather protected panels. Conducting panels
must be earthed.
Due to the high resistance against interference,
the UMG 96L is suitable for continous and un­supervised operation.

As the UMG96L receives its power from phase
L1 of the measuring voltage, at least phase L1
and the neutral conductor N must be con­nected.
The attached voltage must be within the range
of the measuring and operation voltage shown
on type plate.
Either ../5A or ../1A current transformers can be
connected to the current measuring inputs.
The connection of the measuring and operating
voltage is carried out on the back side of the
UMG96L via all-insulated spring power clamps.

Functional description

The electronical three phase measurement sys­tem determines and digitalizes the effective val­ues of voltages and currents in 50/60 Hz net­works.
The operating voltage for operation of UMG96L
is generated by the measuring voltage L1-N. A
random test measurement is carried out each
second at all current and voltage inputs. Meas­uring signal interruptions, which last longer than
one second are safely recognized.
For each random test one period is scanned.
From those sampled values the microprocessor
calculates the electric quantities. These meas­ured values are indicated within the program­mable display. The energy as well as the mini­mum and maximum values are stored every 15
minutes whereas the programmed data are
stored immedately is a none volatile memory
(EEPROM).
The scanning frequency for all measuring in­puts is calculated from the net frequency of
phase 1. At a net frequency of 50Hz the scan­ning frequency is 2,5kHz and for 60Hz it is
3,0kHz.

The measuring and operating voltages must be
connected to the UMG 96L via a separation
(switch or power switch) and an overcurrent
protection fuse (2-10A) in the building installa­tion. The separation (switch or power switch)
must be near the UMG 96L and easily accessi­ble.

L1

L2

L3

N

PE

3M

3M

Voltage measurement

Generation of oper-

ating voltage

3M

UMG96L

Diagr. Generation of the operating voltage from
measurement voltage.

Page 5

Installation

Mounting place

The UMG96L is suitable for a fix insertion into
low and medium voltage switchgear. Any
mounting position is possible.

Measuring and operating voltage

The operating voltage of the UMG96L is gener­ated by the measuring voltage. The measure­ment is designed for three phase systems with
neutral conductor (TN and TT mains). The
measuring and operating voltages must be con­nected to the UMG 96L via a separation (switch
or power switch) and an overcurrent protection
(2-10A) within the building installation.The con­nection of the measuring and operating
voltages is carried out at the back side of the
UMG 96L via shock protected spring clamps.

230V/400V Standard version

Phase L1 and the neutral conductor N must be
connected, and the attached voltage must be
within the range of the measuring and operat­ing voltage.

- The connection wires for the operating volta­ge leading to the UMG96L must be suitable for
voltages up to 300V against ground.

- The measuring and operating voltage has to
be protected by a fuse, which must be in the
range of 2A to 10A.

- A switch or power switch for the operating vol­tage must be provided within the building instal­lation.

- The switch has to be near the instrument and
easily accessible.

- The switch must be marked as separation for
this instrument.

120V/220V Special version

Phase L1 and the neutral conductor N must be
connected, and the attached voltage must be
within the range of the measuring and operat­ing voltage.

60V/110V Special version

Phase L1 and the neutral conductor N must be
connected, and the attached voltage must be
within the range of the measuring and operat­ing voltage.

Attention!

Ꮨ

The limits indicated in the technical data
may not be exceeded, not even while
checking and putting into service of the
UMG 96L.

Ꮨ

Attention!

Before the device is connected to volta­ge for the first time, it should be depos­ited the installation room for at least 2
hours, to create a temperature assimila­tion and avoid condensation and dew.

Page 6

Current measurement

The current measurement is carried out via ../
5A or ../1A current transformers. In case that
the current has to be measured by an Ampere­meter in addition to the UMG96L, the Ampere­meter has to be connected in series to the
UMG96L.
In mains with voltage up to 300VAC against
ground, currents up to 5A can be connected
and measured directly to the UMG 96L.

Verbraucher

Consumer

L l

K k

A

Einspeisung

Supply

Diagr. Connection example: UMG96L with
Amperemeter in series.

l

UMG96L

k

Sum current measurement

If the current measurement is carried out via
two current transformers, the total transformer
ratio must be set to the UMG96L.

Example: Sum current transformer
A current measurement is carried out via one
current transformer with a ratio of 1000/5A and
another one with a ratio of 200/5A. The sum
measurement is carried out with a sum trans­former 5+5/5A.
The UMG96L has to be programmed as fol­lows:

Primary current: 1000A + 200A = 1200A
Secondary current: 5A

Verbraucher 1

Consumer 1

L l

Verbraucher 1

Consumer 1

L l

Inaccuracy

The inaccuracy of the current measuring input
is +- 1% of the measuring range (5A). There­fore, the inaccuracy of the current measure­ment is +-50mA.
Example: Inaccuracy
With a current transformer 200/5A, the measur­ing range is 200A. The inaccuracy is +-1% of
200A = +-2A.

Resolution

The maximum resolution of the current meas­uring inputs is 10mA. The indication changes in

0.01A steps.
Example: Resolution current transformer 200/
5A
With a current transformer ratio of 200/5A, a
resolution of 10mA*40 = 400mA is effected.
The display changes in 0.4A steps.

Small currents

The minimum working current is 20mA. At short
circuited or open current measurement input,
the UMG 96L can indicate a small current. This
current is within the range of the allowed meas­urement inaccuracy.

Ꮨ

Ꮨ



K k

Einspeisung 1

Supply 1

AK AL

K l

k l

UMG96L

BK Bl

K k

Einspeisung 1

Supply 1

Attention!

Current transformers may not be handled
in open condition of the secondary, as
the secondary clamps can lead live vol­tage.

Attention!

Prior to connecting or exchanging the
UMG 96L, the secondary clamps of the
external current transformers have to be
short circuited.

Attention!

The program allows current and voltage
transformer ratio setting only, if the maxi­mum phase power can reach up to

50.0MW and the sum power can reach a
maximum value of 150.0MW.

Page 7

Connecting options

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

L1
L2
L3
PEN

Diagr.: Connection example 1
Four wire measurement with three current
transformers

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

k

../5(1)A

../5(1)A

l

../5(1)A

k

l

Consumer

Verbraucher

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

L1
L2
L3
PEN

Diagr: Connection example 2. Four wire meas­urement with two current transformers.

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

../5(1)A

../5(1)A

k

l

Consumer

Verbraucher

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

uu

u

xx

x
X

XX

L1
L2
L3
PEN

UUU

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

k

../5(1)A

../5(1)A

l

../5(1)A

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

uu

u

xx

x

X

XX

L1
L2

k

l

Verbraucher

Consumer

L3
PEN

UUU

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

../5(1)A

../5(1)A

k

l

Consumer

Verbraucher

Diagr.: Connection example 3
Measurement with three voltage transformers
and three current transformers.

Page 8

Diagr.: Connection example 4
Measurement with three voltage transformers
and two current transformers.

UMG96L

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

uu

u

x
X

XX

L1
L2
L3

UUU

xx

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

../5(1)A

k

../5(1)A

../5(1)A

l

k

Consumer

Verbraucher

Diagr.: Connection example 5
Medium voltage measurement with three volta­ge transformers and three current transformers.

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

uu

u

x
X

XX

L1
L2
L3

UUU

xx

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

../5(1)A

../5(1)A

kl

Consumer

Verbraucher

Diagr.: Connection example 6
Medium voltage measurement with three volta­ge transformers and two current transformers.

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N 1k 1l 2k 2l 3k 3l

L1
L2
L3
N

PE

Current

measurement

0,02 .. 5A

kl

../5(1)A

k

../5(1)A

../5(1)A

UMG96L

Voltage Measure-

ment

see type plate

1234 5678910

L1 L2 L3 N

uu

u

x

xx

X

XX

l

k

l

Consumer

Verbraucher

L1
L2
L3

PE

UUU

Current

measurement

0,02 .. 5A

1k 1l 2k 2l 3k 3l

kl

k

../5(1)A

../5(1)A

l

../5(1)A

k

l

Consumer

Verbraucher

Diagr.: Connection example 7
Measurement in IT networks via three current
transformers.

Diagr.: Connection example 8
Measurement in IT networks with three volta-
ge transformers and three current transformers.

Page 9

Putting into service

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

The putting into service of the UMG 96L should
be carried out as follows:

Installation

The UMG96L is designed for mounting in low
voltage distributions, which contain overvoltage
in measurement category III. The UMG96L is
suitable for installation in fixed and weather
proof panels. Conducting panels must be
earthed. Any mounting position is possible. For
mounting on front panels or doors, the delivered
fixing brackets have to be used.

Panel max. 6

Fixing brack-

ets

90

42

Diagr. Side view

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

23

96

6

Attach measuring and operating voltage

The allowed measuring and operating voltage
of UMG 96L is indicated on the type plate.

Attention!

Ꮨ

Mesuring and operating voltage, which
do not correspond to the indication on
the type plate, can lead to malfunction
and damage of the instrument.

The connection wires for measuring voltage
leading to the UMG96L must be suitable for
voltages up to 300V against ground and 520V
phase to phase.
After connecting the stated measuring and op­erating voltage to the UMG 96L, all segments
of the display appear. After approx. two sec­onds, the UMG 96L switches to the first meas­ured value indication.
In case that no indication appears, please
check, if the attached operating voltage is within
the rated voltage range.

S V J M A D E P

UMG96L

45-65Hz IP20

2,5VA

Made in Germany

4

N

Spannungsmessung

Voltage Measurement

1

2

3

L3

L1

L2

2-10A



Strommessung/Current Measurement

k l

L2 L3L1

k l

k l

57 10896

Program current and voltage transformers

When the device leaves the manufacturer, a
current transformer of 5/5A is set.
The set voltage transformer ratio has to be
changed only, if a voltage transformer is con­nected.
When connecting voltage transformers, please
observe the allowed measuring and operating
voltage stated on type plate!

Page 10