janitza UMG 96 RM-PN User Manual

Doc. no. 1.040.137.1.f 01/2018

Power Analyser

UMG 96 RM-PN

User manual and
technical data

Part no. 33.03.202

Janitza electronics GmbH
Vor dem Polstück 6
D-35633 Lahnau
Support tel. [phone]
Fax [phone]
E-mail: [e-mail]
www.janitza.com

www.janitza.com

Power Analyser

2

UMG 96RM-PN

Table of contents

General information 4
Inspection on receipt 6

Available accessories 7

Product description 8

Proper use 8
UMG 96RM-PN features 10
Measuring process 11
Operating concept 11
GridVis network analysis software 11
Connection variants 12

Assembly 13
Installation 15

Supply voltage 15
Voltage measurement 16
Current measurement using I1 to I4 22
Analogue inputs 30
Residual current monitoring (RCM) via I5, I6 31
Thermistor input 33
RS485 interface 34
Ethernet / ProfiNet interface 37
Digital in-/outputs 39
LED status bar 44

Operation 45

Display mode 45
Programming mode 45
Parameters and measured values 47

Configuration 49

Connecting the supply voltage 49
Current and voltage transformer 49
Programming the current transformer for I1-I3 51
Programming the voltage transformer 52
Programming parameters 53
TCP/IP configuration 54
RS485 device address (addr. 000) 56
RS485 baud rate (addr. 001) 56
User password (addr. 050) 57

Parameters 58

Mean value 58
Averaging method 58
Min. and max. values 58
Mains frequency (addr. 034) 59
Power meters 60
Resetting energy meters (addr. 507) 60
Harmonics 61
Measured value rotation 62
Measured value screens 62
Direction of the rotating field 64
LCD contrast (addr. 035) 64
Backlight 64
Time logging 66
Operating hours counter 66
Total running time, comparator 66

3

UMG 96RM-PN

Serial number (addr. 754) 67
Software release (addr. 750) 67

Commissioning 68

Connecting the supply voltage 68
Connecting the measured voltage 68
Applying the measuring-circuit voltage 68
Direction of the rotating field 69
Checking the phase assignment 69
Checking the power measurement 69
Applying the residual current 69
Failure monitoring (RCM) for I5, I6 70
Checking the measurement 71
Checking the single phase powers 71
Checking the sum powers 71

RS485 interface 72
Digital outputs 74

Digital output status indicators 75
Pulse output (Group 1) 77
Comparators and threshold value monitoring 82

Service and maintenance 88

Service 88
Device calibration 88
Calibration intervals 88
Firmware update 89

Error / warning messages 90

Technical data 96

Function parameters 103
Table 1 - Parameter list 105
Table 2 - Modbus address list 112
Number formats 115
Dimension diagrams 116

Measured value screen overview 118
Connection example 1 124
Connection example 2 125
Basic functions quick guide 126
TCP/IP addressing quick guide 127

4

UMG 96RM-PN

Comments on the manual

We welcome your comments. If anything in this manual
seems unclear, please let us know by sending an e-mail
to: [e-mail]

Meaning of symbols

This manual uses the following pictograms:

General information

Copyright

This manual is subject to the statutory provisions
of copyright law and may not be photocopied, reprinted,
or reproduced - in whole or in part, by mechanical
or electronic means - nor otherwise duplicated or
republished, without the binding written permission of:

Janitza electronics GmbH, Vor dem Polstück 1,
D 35633 Lahnau, Germany

Trademarks

All trademarks and the resulting rights are the property
of their respective owners.

Disclaimer

Janitza electronics GmbH accepts no responsibility for
errors or deficiencies within this manual, and makes
no commitment to keep the contents of this functional
description up to date.

c

Dangerous voltage!

Risk to life or serious injury. Before
commencing work on the system and
the device, they must first be de-energised.

m

Attention!

Please pay attention to the documentation.
This symbol is intended to warn you of
potential dangers, which could occur during
installation, commissioning and use.

C

Note!

5

UMG 96RM-PN

Instructions on use

Please read this operation manual as well as all other
publications that must be consulted for working with this
product (in particular, for the installation, operation or
maintenance).

Observe all safety instructions and warnings. Failure
to comply with the instructions can result in personal
injuries and/or damage to the product.

Any unauthorised changes or use of this device, which
go beyond the mechanical, electrical or otherwise stated
operating limitations, can result in bodily injury or/and
damage to the product.

Any such unauthorised change constitutes "misuse"
and/or "negligence" according to the warranty for
the product and thus excludes the warranty for covering
possible damage resulting from this.

This device must only be operated and repaired by
specialised personnel.

Specialised personnel are persons, that based on
their respective training and experience, are qualified
to recognise risks and prevent potential dangers that

c

If the device is not operated according
to the operation manual, protection is
no longer ensured and hazards can be
presented by the device.

m

Single core conductor must be provided
with core end sheath.

m

Only pluggable screw terminals with the same
number of poles and the same type of construction
are permitted to be connected together.

can be caused by the operation or maintenance of
the device.

Additional legal and safety regulations required for
the respective application are to be followed during
the use of the device.

6

UMG 96RM-PN

Inspection on receipt

The prerequisites of faultless, safe operation of this
device are proper transport and proper storage, set­up and installation, as well as careful operation and
maintenance. If it can be assumed that risk-free
operation is no longer possible, the device must be
immediately put out of operation and secured against
being put back into operation again.
Packing and unpacking must be carried out with
customary care without the use of force and only using
suitable tools. The devices should be visually checked
for flawless mechanical condition.
It can be assumed that risk-free operation is no longer
possible if the device, for example,

• has visible damage,

• no longer works despite the mains power supply
being intact,

• has been exposed to prolonged adverse conditions
(e.g. storage outside the permissible climate
limits without being adapted to the room climate,
condensation, etc.) or rough handling during
transportation (e.g. falling from a height, even if there
is no visible external damage, etc.).

• Please check the delivered items for completeness
before you start installing the device.

C

All screw-type terminals included in
the scope of delivery are attached to
the device.

Concerning this operation manual

This operation manual is part of the product.

• Read the operation manual before using the device.

• Keep the operation manual instructions throughout
the entire service life of the product and have them
readily available for reference.

• Pass the operation manual on to each subsequent
owner or user of the product.

7

UMG 96RM-PN

Number Part no. Designation

2 52.22.251 Mounting clips
1 10.01.855 Screw-type terminal, pluggable, 2-pole (auxiliary power)
1 10.01.849 Screw-type terminal, pluggable, 4-pole (voltage measurement)
1 10.01.871 Screw-type terminal, pluggable, 6-pole (current measurement I1-I3)
1 10.01.875 Screw-type terminal, pluggable, 2-pole (current measurement I4)
1 10.01.865 Screw-type terminal, pluggable, 10-pole (digital/analogue inputs/outputs)
1 10.01.857 Screw-type terminal, pluggable, 2-pole (RS 485)
1 10.01.859 Screw-type terminal, pluggable, 3-pole (digital/pulse output)
1 08.01.505 Patch cable 2 m, twisted, grey (connection UMG 96RM-PC/switch)
1 52.00.008 RS485 termination resistor, 120 ohms
1 29.01.065 Silicone seal, 96 x 96
1 15.06.015 Interface converter RS485 <-> RS232
1 15.06.025 Interface converter RS485 <-> USB

Available accessories

8

UMG 96RM-PN

Product description

Proper use

The UMG 96RM-PN is intended for the measurement
and calculation of electrical variables such as voltage,
current, power, energy, harmonics, etc. in building
installations, on distribution units, circuit breakers and
busbar trunking systems.

The UMG 96RM-PN is suitable for integration into fixed
and weatherproof switch panels. Conductive switch
panels must be earthed.

Measured voltages and measured currents must derive
from the same network.
The measurement results can be displayed and read
out and further processed via the RS485 or ProfiNet
interface.

The voltage measurement inputs are designed for
measurements in low voltage networks where rated
voltages of up to 300V phase to earth and surge voltages
of overvoltage category III can occur.

The current measurement inputs I1-I4 of the UMG
96RM-PN are connected via external ../1A or ../5A
current transformers.

A continuous monitoring of residual currents (residual
current monitor, RCM) is performed via the current
measurement inputs I5 and I6 via an external residual
current transformer with a rated current of 30 mA.

Measurements in medium and high-voltage networks are
always performed via current and voltage transformers.

m

Residual current monitoring monitors residual
currents via external current transformers.
The device is not an independent protective
device!

9

UMG 96RM-PN

Device parameters

• Supply voltage:
Option 230V: 90V - 277V (50/60Hz) or
DC 90V - 250V; 300V CATIII
Option 24V: 24 - 90V AC / DC; 150V CATIII

• Frequency range: 45 - 65 Hz

Device functions

• 3 voltage measurement channels, 300V

• 4 current measurements
(via current transformer ../5A or ../1A)

• 2 residual current measurements
(via residual current transformer ../30mA) or
optionally 2 temperature measurements

• RS485 interface, ethernet and ProfiNet

• 2 digital outputs and additionally 3 digital inputs/
outputs

10

UMG 96RM-PN

UMG 96RM-PN features

General information

• Front panel integration device with dimensions
96x96 mm

• Connection via pluggable screw terminals

• LC display with backlight

• Operation via 2 buttons

• 3 Voltage and 4 current measurement inputs

• Either 2 residual current or temperature
measurement inputs

• 2 digital outputs and 3 digital inputs/outputs

• RS485 interface (Modbus RTU, slave, up to 115
kbps)

• 2 interfaces for ethernet / ProfiNet

• Working temperature range -10°C to +55°C

Measurement uncertainty

• Effective energy, measurement uncertainty class

0.5 for ../5A converter

• Effective energy, measurement uncertainty class 1
for ../1A converter

• Reactive energy, class 2

Measurement

• Measurement in IT, TN and TT networks

• Measurement in networks with rated voltages up
to L-L 480V and L-N 277V

• Measurement range current 0 to 5A eff.

• True RMS (TRMS)

• Continuous sampling of the voltage and current
measurement inputs

• Continuous monitoring of residual currents
with failure monitoring

• Temperature measurement

• Frequency range of the fundamental oscillation 45
Hz to 65 Hz

• Measurement of the 1st to 40th harmonics, for ULN
and I1-I3

• Uln, I, P (cons./del.), Q (ind./cap.)

• Capturing substantially more than 1000 measured
values

• Fourier analysis 1st to 40th harmonics for U and
I1-I3

• 7 power meters for

Effective energy (cons.), Effective energy (delivery),
Effective energy (without backstop),
Reactive energy (in 4 quadrants: delivered, consumed,
in each case ind./cap.),
Reactive energy (without backstop), Apparent energy,
for each of L1, L2, L3 and sum

11

UMG 96RM-PN

Measuring process

The UMG 96RM-PN measures continuously and
calculates all effective values over a 10/12 period
interval. The device measures the real effective value
(TRMS) of the voltages and currents connected to
the measurement inputs.

Operating concept

You can program and call up the measured values via
many routes using the UMG 96RM-PN.

• Directly on the device via 2 buttons.

• Using the GridVis programming software.

• Using the device homepage (no programming).

• Using the Modbus protocol.
You can modify and call up the data using
the Modbus address list. The list can be called up
via the device's home page and can be found on
the enclosed CD.

• Using the PLC within a PROFINET environment.

This operation manual only describes how to operate
the UMG 96RM-PN using the two buttons.
The GridVis programming software has its own "online
help" system.

GridVis network analysis software

The UMG 96RM-PN can be programmed and read out
using the GridVis network analysis software (Download:
www.janitza.com). For this, a PC must be connected to
the UMG 96RM-PN via a serial interface (RS485) or by
ethernet.

GridVis features

• Programming the UMG 96RM-PN

• Graphical representation of measured values

12

UMG 96RM-PN

Connection variants

Connection of a UMG 96RM-PN to a PC via an interface
converter:

Connection of a UMG 96RM-PN via an UMG 604 as
a gateway.

Direct connection of a UMG 96RM-PN to a PC/PLC via
Ethernet/ProfiNet.

Ethernet / ProfiNet

Ethernet / ProfiNet

RS485

RS485

PC (GridVis)
SPS

UMG 96RM-PN

UMG 96RM-PN

Ethernet / ProfiNet

Ethernet / ProfiNet

RS485

RS485

RS485

RS485

Ethernet

Ethernet / ProfiNet

Ethernet / ProfiNet

PC (GridVis)
SPS

UMG 96RM-PN

UMG 96RM-PN

UMG 604

Connection of a UMG 96RM-PN to a PC/PLC via
Ethernet/ProfiNet.

Ethernet / ProfiNet

Ethernet / ProfiNet

Ethernet / ProfiNet

Ethernet / ProfiNet

Ethernet / ProfiNet

RS485

RS485

RS485

RS485

Ethernet

Ethernet / ProfiNet

Ethernet / ProfiNet

PC (GridVis)
SPS

PC

(GridVis)

SPS

UMG 96RM-PN

Switch

Ethernet / ProfiNet

Ethernet / ProfiNet

PC (GridVis)
SPS

UMG 96RM-PN

UMG 96RM-PN

13

UMG 96RM-PN

Assembly

Position of installation

The UMG 96RM-PN is suitable for integration into fixed
and weatherproof switch panels. Conductive switch
panels must be earthed.

Mounting position

To ensure adequate ventilation, the UMG 96RM-PN
must be installed vertically. There should be separation
above and below of at least 50mm with 20mm space to
the sides.

Front panel section

Cut-out size:
92

+0.8

x 92

+0.8

mm.

m

Failure to meet the minimum clearances
can destroy the UMG 96RM-PN at high
ambient temperatures!

Fig. Mounting position
UMG 96RM-PN
(View from rear)

14

UMG 96RM-PN

Mounting

The UMG 96RM-PN is secured in the switchboard
by the mounting clips on the side. Before insertion
the device they must be removed, for example by using
a screwdriver to lever them horizontally.

Fig. Side view of
the UMG 96RM-PN with
mounting clip.
To release the clips, use
a screwdriver to lever
them horizontally.

Mounting is then performed by sliding in and engaging
the clips and subsequently screwing in the screws.

• Screw in the clamping screws until they are just
touching the mounting plate.

• Tighten the clamping screws by two more turns
each (tightening the screws too far can destroy
the mounting clips).

Mounting plate

Clamping screw

Screwdriver

Mounting clip

When clamping screws
touch the mounting
plate: max. two
more turns to secure
the device

15

UMG 96RM-PN

Installation

Supply voltage

The UMG 96RM-PN needs a supply voltage to operate.
The supply voltage is connected on the rear side of
the device via terminal blocks.

Before connecting the supply voltage, ensure that
the voltage and frequency correspond to the details on
the rating plate!

Fig. Connection example of the supply voltage to a
UMG 96RM

Circuit breaker

Fuse

N

L

m

• The supply voltage must be connected
through a fuse according to the techni­cal data.

• If installed in a building, a disconnector
or circuit breaker must be provided for
the supply voltage.

• The disconnector must be installed
near the device and easily accessible to
the user.

• The switch must be marked as the circuit
breaker for this device.

• Voltages which are over the permitted
voltage range can destroy the device.

16

UMG 96RM-PN

Voltage measurement

You can use the UMG 96RM-PN for voltage measurement
in TN, TT, and IT systems.
Voltage measurement in the UMG 96RM-PN is designed
for the overvoltage category 300V CAT III (measurement
voltage surge 4kV).

Fig. Schematic diagram - Measurement on three-phase
4-conductor systems.

Fig. Schematic diagram - Measurement on three-phase
3-conductor systems.

In systems with no N, measured values requiring an N
refer to a calculated N.

480V 50/60Hz

DC

AC/DC

L2

L3

Auxiliary supply

Voltage measurement

4M

4M

4M

4M

V1

V3V2

Earthing of
the system

Impedance

L1

VN

UMG 96RM

DC

AC/DC

PE

277V/480V 50/60Hz

L2

L3

N

L1

Auxiliary supply

Voltage measurement

4M

4M

4M

4M

V1 V3V2 VN

UMG 96RM

N

L1

240V
50/60Hz

17

UMG 96RM-PN

Nominal network voltage

Lists of networks and their nominal network voltages
in which the UMG 96RM-PN can be used.

Three-phase 4-conductor systems with
earthed neutral conductor.

Maximum system rated
voltage

U

L-N

/ U

L-L

66V / 115V
120V / 208V
127V / 220V
220V / 380V
230V / 400V
240V / 415V
260V / 440V
277V / 480V

Fig. Table for network rated voltages i.a.w. EN60664­1:2003 suitable for the voltage measurement inputs.

Unearthed three-phase 3-conductor systems.

Fig. Table for network rated voltages i.a.w. EN60664­1:2003 suitable for the voltage measurement inputs.

Maximum system rated
voltage

U

L-L

66V
120V
127V
220V
230V
240V
260V
277V
347V
380V
400V
415V
440V
480V

18

UMG 96RM-PN

Voltage measurement inputs

The UMG 96RM-PN has three voltage measurement
inputs (V1, V2, V3).

Overvoltage
The voltage measurement inputs are suitable for
measurements in networks where overvoltages of
overvoltage category 300V CATIII (measurement voltage
surge 4kV) can occur.

Frequency
The UMG 96RM-PN requires the mains frequency for
the measurement and calculation of measured values.
The UMG 96RM-PN is suitable for measuring in
the frequency range from 45 to 65 Hz.

Fig. Example connection for measuring voltage.

Circuit breaker

Fuse

L2

L3

N

L1

19

UMG 96RM-PN

c

Attention!

Voltages that exceed the allow nominal
network voltages must be connected
via a voltage transformer.

c

Attention!

The UMG 96RM-PN is not suitable for
measuring DC voltages.

c

Attention!

The voltage measurement inputs on
the UMG 96RM-PN are dangerous if
touched!

When connecting the voltage to be measured,
the following must be observed:

Isolation device

• A suitable circuit breaker must be fitted to disconnect
and de-energise the UMG 96RM-PN.

• The circuit breaker must be placed in the vicinity of
the UMG 96RM-PN, be marked for the user and easily
accessible.

• The circuit breaker must be UL/IEC certified.

Overcurrent protection device

• An overcurrent protection device must be used for
line protection.

• For line protection, we recommend an overcurrent
protection device as per the technical specifications.

• The overcurrent protection device must be suitable
for the line cross section used.

• The overcurrent protection device must be UL/IEC
certified.

• A circuit breaker can be used as an isolating and line
protection device. The circuit breaker must be UL/IEC
certified.

• Measured voltages and measured currents must
derive from the same network.

20

UMG 96RM-PN

Connection schematics, voltage measurement

• 3p 4w (addr. 509= 0), factory default setting • 3p 4wu (addr. 509 = 1)

• 3p 4u (addr. 509 = 2) • 3p 2u (addr. 509 = 5)

Fig. System with three phase conductors and
a neutral conductor.

Fig. System with three phase conductors and
a neutral conductor. Measurement made with
a voltage transformer.

Fig. System with three phase conductors
without a neutral conductor. Measured values
which require an N refer to a calculated N.

Fig. System with three phase conductors without
a neutral conductor. Measurement made with
a voltage transformer. Measured values which
require an N refer to a calculated N.

L1

L2

L3

N

V1 V2 V3 V N

L1

L2

L3

N

V1 V2 V3 V N

L1

L2

L3

V1 V2 V3 V N

L1

L2

L3

V1 V2 V3 V N

21

UMG 96RM-PN

• 1p 2w (addr. 509 = 6)

• 2p 4w (addr. 509 = 3)• 1p 2w1 (addr. 509 = 4)

Fig. TN-C system with single-phase three­conductor connection. Measured values derived
from voltage measurement input V3 are taken to
be zero and are not calculated.

Fig. Measured values derived from voltage
measurement inputs V2 and V3 are taken to be
zero and are not calculated.

Fig. System with equal loading of the phases.
The measured values for voltage measurement
input V2 are calculated.

• 3p 1w (addr. 509 = 7)

Fig. 3 systems with equal loading of the phases.

L1

L2

V1 V2 V3 VN

L1

L2

L3

N

V1 V2 V3 V N

L1

N

V1 V2 V3 V N

L1

L2
L3

L1

L2
L3

L1

L2
L3

V1 V2 V3 V N

N

22

UMG 96RM-PN

Current measurement using I1 to I4

The UMG 96RM-PN is intended for the connection of
current transformers with secondary currents of ../1A
and ../5A, via terminals I1-I4. The factory default for
the current transformer ratio is 5/5A and must be adapted
to the current transformer employed if necessary.
Direct measurement without a current transformer is not
possible with the UMG 96RM-PN.
Only AC currents can be measured - DC currents
cannot.

Current measurement input I4 only produces an
apparent current measurement, due to there being
no multiplier with a voltage. Power measurements are
therefore not possible with input I4.

c

Attention!

The current measurement inputs are dangerous
to touch.

m

The attached screw-type terminal must be
fixed using the two screws on the device!

L2

L3

N

L1

Fig. Current measurement (I1-I3) via current
transformers (connection example)

Load

23

UMG 96RM-PN

m

Attention!

The UMG 96RM-PN is not suitable for
measuring DC voltages.

c

Earthing of current transformers!

If a connection is provided for the earthing
of secondary windings, then it must be
connected to the earth.

C

It is not necessary to configure a connection
schematic for measurement input I4.

L2

L3

N

L1

Fig. Current measurement (I4) via current
transformers (connection example)

Load

24

UMG 96RM-PN

Current direction

The current direction can be individually corrected via
the existing serial interfaces or on the device for each
phase.
If incorrectly connected, a subsequent re-connection of
the current transformer is not required.

With residual current monitoring (RCM) there is no
directional sensitivity of the residual currents on
the network or load sides (not directionally sensitive).

c

Current transformer connections!

The secondary connection of the current
transformer must be short circuited on this
before the current feed to the UMG 96RM­PN is disconnected!
If a test switch, which automatically short­circuits the secondary wires of the current
transformer, is available then it is sufficient
to set this to the "Test" position insofar
as the short-circuiting device has been
checked beforehand.

c

Open-circuit current transformers!

High voltage spikes that are dangerous to
touch can occur on current transformers
that are driven with open-circuit secondary
windings!
With "safe open-circuit current trans­formers" the winding insulation is rated
such that the current transformer can be
driven open. However, even these current
transformers are dangerous to touch when
they are driven open-circuit.

c

Attention!

Residual current monitoring is performed
using the terminals I5 and I6 (cf. page

30). There is no directional sensitivity of
the residual currents of the network or load
sides (not directionally sensitive).

c

Earthing of current transformers!

If a connection is provided for the earthing
of secondary windings, then it must be
connected to the earth.

25

UMG 96RM-PN

c

Attention!

The UMG96RM is only approved
for measuring current with a current
transformer.

26

UMG 96RM-PN

Connection schematics, current measurement (I1-I3)

• 3p 4w (addr. 510= 0), factory default setting • 3p 2i (addr. 510 = 1)

• 3p 2i0 (addr. 510 = 2) • 3p 3w3 (addr. 510 = 3)

Fig. Measurement in a three-phase network with
unequal loading.

Fig. The measured values for current
measurement input I2 are calculated.

Fig. System with equal loading of the phases.
The measured values for current measurement
input I2 are measured.

Fig. Measurement in a three-phase network with
unequal loading.

L1

L2

L3

N

I1 I2 I3

L1

L2

L3

N

I1 I2 I3

L1

L2

L3

I1 I2 I3

L1

L2

L3

I1 I2 I3

27

UMG 96RM-PN

• 1p 2i (addr. 510 = 6)

• 3p 3w (addr. 510 = 4)

• 1p 2w (addr. 510 = 7)

• 2p 4w (addr. 510 = 5)

Fig. Measured values derived from current
measurement input I3 are taken to be zero and
are not calculated.

Fig. Measured values derived from current
measurement inputs I2 and I3 are taken to be
zero and are not calculated.

Fig. System with equal loading of the phases.
The measured values for current measurement
input I2 are calculated.

Fig. System with equal loading of the phases.
The measured values for current measurement
inputs I2 and I3 are calculated.

I1 I2 I3

L1

L2

L1

L2

L3

N

I1 I2 I3

L1

N

I1 I2 I3

L1

L2

L3

N

I1 I2 I3

28

UMG 96RM-PN

Connection schematics, current measurement (I1-I3)

• 3p 1w (addr. 510 = 8)

Fig. 3 systems with equal loading of the phases.

Ammeter

If you wish to measure the current not only with the UMG
96RM but rather with an ammeter too, the ammeter
must be connected to the UMG 96RM-PN in series.

Fig. Current measurement with an additional
ammeter (example).

L1

L2
L3

I1 I2 I3

L1

L2
L3

L1

L2
L3

UMG

S2

I

S

1

Einspeisung
Supply

Verbraucher

Consumer

A

(k)S

1 S2(l)

P

2(L)(K)P1

29

UMG 96RM-PN

Total current measurement

If the current measurement is done via two current
transformers, the overall transformation ratio of
the current transformers must be programmed into
the UMG 96RM-PN.

Example: The current is measured via two current
transformers. Both current transformers have a
transformation ratio of 1000/5A. The summation
measurement is performed using a total current
transformer 5+5/5A.

The UMG 96RM-PN must then be setup as follows:
Primary current: 1000A + 1000A = 2000A
Secondary current: 5A

Fig. Current measurement via a total current transformer
(example).

UMG

S2

I

S

1

P1

P2

Einspeisung 1
Supply 1

Einspeisung 2

Supply 2

1P1

1P2

(K)

(L)

(k)
(l)

1S

2

1S1

1S1 1S2 2S1 2S2

2S1

2S2

(k)

(l)

(K)
(L)

2P

1

2P2

Verbraucher A
Consumer A

Verbraucher B

Consumer B

30

UMG 96RM-PN

Analogue inputs

The UMG 96RM-PN has two analogue inputs, each of
which can be used for a residual current measurement
or a temperature measurement. A measurement is
performed here via terminals 32-34 (Input 1) and 35-37
(Input 2).

The analogue inputs can be used either for residual
current measuring or temperature measuring, per
the following table:

Measurement Terminal

Temperature 32/34 (Input 1) and

35/37 (Input 2)

Residual current 32/33/34 (Input 1) and

35/36/37 (Input 2)

c

Attention!

Operating equipment connected to
the analogue inputs must feature
reinforced or double insulation to the
mains supply circuits!

Example - temperature sensor:

A temperature sensor in close proximity to non-isolated
mains cables should measure within a 300V CAT III
network.
Remedy:
The temperature sensor must be equipped with
reinforced or double insulation for 300V CAT III. This
equates to a test voltage for the temperature sensor of
3000V AC (duration 1 min.).

Example - residual current transformer:

A residual current transformer should measure on
isolated mains cables within a 300V CAT III network.
Remedy:
The insulation of the mains cables and the insulation
of the residual current transformer must fulfil the basic
insulation requirements for 300V CAT III. This equates
to a test voltage of 1500V AC (duration 1 min.) for
the insulated mains cables and a test voltage of 1500 V
AC (duration 1 min.) for the residual current transformer.