NZR DHZ Series User manual

Stand: 09.01.2008
Last revised: 14.04.2008
Digital Active Energy, Dual-Tariff, Export & Import Meter
Installation and Operating Manual
NORDWESTDEUTSCHE ZÄHLERREVISION
ING. AUG. KNEMEYER GMBH & CO. KG
Heideweg 33
49196 Bad Laer
Phone [phone] / 29 28 – 0
Fax [phone] / 29 28 – 77
E-Mail [email protected]
Internet www.nzr.de

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The information published in this manual is protected by copyright. Translations, reprints,
reproductions and storage in data processing systems are permitted only with the
express permission of NZR.
All trademarks and product names mentioned in this manual are the property of NZR
Nordwestdeutsche Zählerrevision Ing. Aug. Knemeyer GmbH & Co. KG or the respective
proprietors.
The content of this manual and the technical specifications can be supplemented,
modified or removed without prior notice.
The descriptions of the product specification in this manual do not constitute elements of
a contract.
© 2008 NZR Nordwestdeutsche Zählerrevision
Ing. Aug. Knemeyer GmbH & Co. KG.
All rights reserved.
If you have questions or suggestions, please contact us:
NZR Nordwestdeutsche Zählerrevision
Ing. Aug. Knemeyer GmbH & Co KG
Heideweg 33
D – 49196 Bad Laer
Tel.: [phone] / 29 28 - 0
Fax: [phone] / 29 28 - 77
Email: [email protected]
Internet: www.nzr.de

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Contents
1 Preliminary remarks ................................................................................. 5
1.1 Safety information ...........................................................................................5
1.2 Maintenance...................................................................................................5
1.3 Information for the electric power customer.......................................................5
2 Mounting and installation ......................................................................... 6
2.1 Mounting ........................................................................................................6
2.2 Installation......................................................................................................7
2.2.1 Connection examples......................................................................................8
3 General description................................................................................ 10
4 Standards and regulations...................................................................... 11
5Housing, control and display elements.................................................... 12
5.1 Overview......................................................................................................12
5.2 LC Display....................................................................................................13
6 Technical description ............................................................................. 14
6.1 Technical data .............................................................................................. 14
6.2 Operational diagram......................................................................................15
6.2.1 Direct-measuring meter up to 65 A................................................................. 15
6.2.2 Transformer connected meter up to 5 A..........................................................15
6.3 Inputs........................................................................................................... 16
6.4 Outputs ........................................................................................................16
6.4.1 Secondary impulse output .............................................................................16
6.4.2 Primary impulse output.................................................................................. 16
6.4.3 Test LED......................................................................................................17
6.5 Interfaces .....................................................................................................17
6.5.1 M-Bus interface ............................................................................................17
6.5.2 LON interface ...............................................................................................17
6.5.3 RS485 interface ............................................................................................18
6.6 Battery .........................................................................................................19
6.7 Path disconnector .........................................................................................19
7 Operation of the meter............................................................................ 20
7.1 Display control ..............................................................................................20
7.1.1 Standard menu .............................................................................................21
7.1.2 Test mode (only for calibration)......................................................................24
7.1.3 Address menu ..............................................................................................26
7.1.4 Edit menu.....................................................................................................28
8 Appendix................................................................................................ 32
8.1 EC Declaration of Conformity.........................................................................32
8.2 Declaration of Conformity for the EC Prototype Certificate ............................... 33

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Illustrations
Figure 1: Housing dimensions .............................................................................6
Figure 2: Housing, control and display elements ................................................. 12
Figure 3: Layout of display ................................................................................13
Figure 4: Operational diagram of direct-measuring meter ....................................15
Figure 5: Operational diagram of transformer meter ............................................15
Figure 6: System layout – RS485 two-wire bus...................................................18
Figure 7: Detail drawing – RS485 terminating resistor ......................................... 18
Figure 8: DHZ with path disconnector ................................................................19
Tables
Table 1: Terminal dimensions, connection diameters, and torques .......................8
Table 2: Housing and display elements.............................................................12
Table 3: Description of display elements ...........................................................13
Table 4: Technical data....................................................................................14
Table 5: Specifications of inputs .......................................................................16
Table 6: Specifications of outputs .....................................................................16
Table 7: Specification of RS485 interface.......................................................... 18
Table 8: Error code description.........................................................................20
Table 9: Standard menu .................................................................................. 23
Table 10: Test mode ......................................................................................... 26
Table 11: Address menu....................................................................................27
Table 12: Resolutions of the energy registers...................................................... 28
Abbreviations
A active energy
+A positive active energy (customer purchases from utility co.)
-A negative active energy (customer delivers to utility co.)
Cl. accuracy class
DIN German Institute for Standardization
EN European standard
UC electric utility company
IEC International Electrotechnical Commission
Imp. impulse
Imp./kWh impulses per kWh
L1, L2, L3 lead wires
LED light emitting diode
N neutral wire
P active power
PTB Federal Institute of Physics and Technology
S0 interface according to DIN 43 864

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1 Preliminary remarks
This manual describes all model variants and functions of the DHZ, firmware version
3.03 and above. Please note that the meters can be designed differently with respect to
configuration data interfaces, input/outputs, etc. Therefore, it is possible that meter
features are described that do not apply to the particular meter you are using.
1.1 Safety information
The meters are designed only for measuring electrical power and may not be operated
beyond the scope of the specified technical data
(see rating plate).
During installation or replacement of the meter, the wires to which the meter is
connected must be voltage-free. Use only the screw terminals provided. Contact with
voltage-carrying parts can result in fatal injury! Therefore, the corresponding inputs fuses
should be removed and stored so that other persons cannot use them inadvertently.
Before opening the unit, the secondary circuits of the current transformers (on the test
terminals) absolutely must be short-circuited. The high voltage at the interrupted current
transformer can cause fatal injury and will destroy the current transformer.
S0 inputs can carry mains voltage if the meter is installed incorrectly.
Caution: Danger to life and limb!
Always comply with local safety regulations. The meters may be installed only by
qualified and trained personnel.
1.2 Maintenance
The meter is maintenance-free. If it is damaged (e.g. during transport or storage) it
cannot be repaired by the user.
Opening the meter voids the warranty. The same applies in the event of defects resulting
from external influences (e.g. lightning, water, fire, extreme temperatures and weather
conditions, improper or negligent use or handling).
1.3 Information for the electric power customer
Information according to the Federal Institute of Physics and Technology:
The user must ensure that the mechanical equivalents for which the electric power
customer is charged are made transparent for the customers for whom the meters are
used. To "make transparent" means to provide information to the customers by means of
calibrated displays for the meters in order to allow the customer to understand the items
in the electric utility bill.
In particular, the following information must be provided:
- which of the values displayed by the meters are the results of calibrated functions,

- that values not displayed cannot be used for billing purposes and that display values
that are the results of non-calibrated functions, are provided only for information
purposes and likewise cannot be used for billing purposes.
The measuring instruments must be used so that the billing-relevant measuring results
and the error messages can be read by the electric power customer, as well.
2 Mounting and installation
2.1 Mounting
The meters of the DHZ series are designed for mounting on top-hat rails TH 35-7.5 in
accordance with DIN 60715.
Figure 1: Housing dimensions
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2.2 Installation
The meter must be connected according to the wiring diagram, which you will find in the
terminal cover of the meter. Examples of wiring diagrams can be found on page 8.
The directly connected model of the DHZ can be connected on the output side to a 3- or
4-phase busbar with left-side N connection. The busbars are suitable for equipment from
AEG, Hager, Siemens, Moeller and Geyer.
Meters for direct connection must be protected by a 63 A input fuse; meters connected to
transformers in the voltage path with < 10 A. The control input must be protected with a
0.5 A input fuse.
To protect the DHZ from unauthorized access, it can be sealed with a lead seal (see
page 12).
The inputs for the current and voltage lines and for the control input and the impulse
output are located on the top of the meter.
S0 output input
8
U3
2
U1
5
U2
1
I1
4
I2
7
I3
10/11
N
41/40 13/15
The current outputs, the optional electrical interface and, for direct measuring meters, the
connection for busbars are located on the bottom of the meter.
M-Bus interface Connection for busbars
12
N
3
I1
6
I2
9
I3
23/24
LON/RS485 interface
14/16
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Current terminal /
N terminal Voltage terminals Auxiliary terminals
up to 65 A up to 5 A up to 65 A up to 5 A up to 65 A up to 5 A
Terminal
dimensions
W x H (d) mm 6.9 x 7.9 3.3 x 3.0 2.7 x 3.0 2.7 x 3.0 d = 2.5 d = 2.5
Maximum
connection
diameters (mm2)16 42.5 2.5 2.5 2.5
Maximum torques
for connection
terminals (Nm) 3.0 0.5 0.5 0.5 0.8 0.8
Table 1: Terminal dimensions, connection diameters, and torques
Note
During installation of the meter, tighten the connecting wires to the correct torque
according to EN 60999 to ensure a reliable contact. The torque depends on the type of
connecting wire and the maximum current.
To prevent damage to the meter, do not exceed the maximum permissible torque
for the connecting terminal.
2.2.1 Connection examples
Below you will find several examples of wiring diagrams. When connecting a meter,
always comply with the corresponding wiring diagram, which you will find in the terminal
cover of the meter.
Important: The neutral wire terminals 10/11 and 12 are located on the left.
2-wire model, connected directly
3-wire model, connected to current and voltage transformer
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4-wire model, connected to current transformer
4-wire model, connected directly
4-wire model, connected to current and voltage transformer
4-wire model, connected to current and voltage transformer (3 voltage transformers –
superposed circuit with 2 current transformers)
4-wire model, connected to current and voltage transformer (superposed circuit with 2
current transformers)
9

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3 General description
The DHZ is a digital single or dual-tariff meter for measuring positive and negative active
energy in 2-, 3- and 4-wire networks. The tariff switching is controlled via an external
control input.
The applications for the DHZ are primarily the recording of energy data in industrial and
building technology, switchgear construction and use in the energy supply sector.
The design of the meter enables space-saving installation (only 6 TE wide) and
connection via cable links or busbars.
The wall model of the DHZ features a configurable transformer ratio for recording the
actual energy consumption. The transformer ratio can be set directly on the meter via the
control button (only on the non-calibrated model).
The energy consumption values are displayed as an 8-digit number on an LCD.
The energy consumption data can also be output via a secondary or primary impulse
output and/or via an electric interface (M-Bus, LON or RS485). The impulse constant and
impulse length are configurable for the secondary impulse output; they have fixed values
for the primary impulse output.
The DHZ is available in accuracy class 1 or 2 according to IEC 62053-21 or accuracy
class B or A according to DIN EN 50470-1, -3.