PROMETER Presentation
PROMETER Presentation
PROMETER Presentation
Product Presentation
CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Procedure when contacting Cewe Instrument ProMeter user support by phone or fax . . . . . . . . . . . . . 4
1.2 Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
CONTENTS
4 Working principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.2 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.3 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.4 Data integrity and security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.5 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.6 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3
GENERAL
1 General
1.1 Procedure when contacting Cewe Instrument ProMeter user support by phone or fax
Get the following information about the problem before calling or sending a fax
1. Meter type number
2. Serial number
3. Program version (can be found last in display sequence 2)
4. A detailed description of the problem symptoms
1.2 Copyright
This publication is produced by and copyright by Cewe Instrument AB:
Mail address
Cewe Instrument AB
Box 1006
S-61129 NYKÖPING
SWEDEN
Cargo address
Cewe Instrument AB
Nyköping Strand
NYKÖPING
SWEDEN
1.3 Disclaimer
This installation manual covers all types of ProMeter energy meters. Some of the descriebed features and
instructions may not be applicable to all types.
4
GENERAL DESCRIPTION
Display
Calibration LED
Alarm LED
CAL
Reset key
ALARM
POWER Display key
Power LED
RS232/485 connector
Figure 2-A
2.2.2 Receive and accumulate in registers All quantities in accumulating registers can be
pulses from other sources subdivided into separate registers according to a
tariff schedule allowing up to five seasons with
The ProMeter can receive and accumulate energy
eight different daytypes. Each daytype can use
pulses from other meters into special registers.
eight different rates and do eight rate switching
This enables one ProMeter to act as a three-input
events per day.
data concentrator and record energy from other
(simpler) meters. Annual tariff schedules can be created and stored
up to seven years in advance. In the tariff calendar
fixed and moving holidays and daylight savings
time changes can be pre-set.
5
GENERAL DESCRIPTION
2.2.5 Calculate maximum demand The ProMeter may be read and configured either
ProMeter can be set up to calculate up to five via an optical port (IEC1107, FLAG) on the front
different maximum demand values and store in five panel or via an optional RS-232/RS485 serial port.
different MD registers. The MD’s to be calculated The ProWin software runs on a PC with MS Win-
can be selected from active, reactive or apparent dows and can be used to alter the factory settings.
registers for both energy directions or from one or
2.2.10 Security
more of the three pulse inputs registers. These
MD’s can also be calculated from one or both of The security system in the ProMeter and ProWin
the two summation registers. software consists of three password levels. For
changing anything in the meter at all, the meter
2.2.6 Split max. demand values into tariffs password must be known. In addition there is a
Maximum average power demand (MD) can be password necessary for changing the configu-
set to sort periodical (with presettable period) ration. For calibration another password must be
MD’s into tariff registers, following a tariff swit- known, and a programming jumper inside the meter
ching schedule of its own. Four tariffs can be pre- must be moved to the calibration position.
set and three different MD:s can be recorded. The meter cover is provided with sealing screws,
as is the terminal cover.
2.2.7 Control tariffs (also in other meters) or be
controlled by external signals 2.2.11 Communicate with the user/operator for
The ProMeter can use four relay outputs to create configuring and reading the ProMeter LCD-
binary coded tariff control signals for controlling display using front panel keys
the tariff registers of other (slave) meters. The LCD display consist of two lines each with 16
The three ProMeter opto inputs can be programmed characters. All information is displayed as text with
to accept binary coded tariff control signals from quantities and units. Optionally displaying of regis-
another tariff controlling device e g tariff switching ter codes according to the DIN 43863-3, EDIS,
clock or another ProMeter for switching tariffs. can be configured. The ProMeter can be configu-
red to display only those quantities required. They
2.2.8 Store and provide periodical invoicing can be programmed to be displayed in any order.
data
There are three different display sequences avail-
If meter readings are required at precise times, able. They can be separately configured, e.g. se-
the ProMeter offers the feature of billing regis- quence one can be set up to display all information
ters. These registers are used to take a ”snapshot” of interest for the consumer, and sequence two can
i.e. a copy of selected accumulating and MD likewise display information of interest for the
registers at predetermined times, and store these power utility. In sequence three, the contents of the
separately for later reading. Up to thirteen times last stored billing registers can be read on the
can be pre-set each year. Two previous periods display.
can be stored. The data for the oldest billing period
The information in one display sequence can be
will be overwritten when data for a new period is
stepped through by pressing the display key.
saved at the end of the present billing period.
Changing to another display sequence is also done
2.2.9 Configurable with the display key.
The ProMeter has many features and every user 2.2.12 Optical data communication interface
may not want to use all possible features or stan- IEC 1107
dard settings. Most users will want the ProMeter
All versions of ProMeter are equipped with an
to do what he or she requires, no less and no more.
opto port complying with IEC 1107 for communica-
For this reason it is possible to select which meter
ting with a PC through an IR opto communications
functions and settings that shall be used. This is
head connected to the PC. The opto head which is
decided by configuring the ProMeter, where the
magnetic attaches to the opto port on the meter
ProWin configuring software is used to set all
front panel. The software protocol is also IEC1107.
meter parameters to create the desired functions
and settings. The ProMeter is then ”tailor-made”
for each user’s requirements
6
GENERAL DESCRIPTION
2.2.13 RS232 / RS485 serial communication 2.2.16 Display instantaneous values for currents,
interface voltages, power factor, phase angle.
Some versions of ProMeters are equipped with a In addition to the conventional data from the energy
RS232 or RS485 serial communications port. registers, instantaneous values can be read for the
Configuration of the ProMeter functions and set- following electrical quantities:
tings as well as reading data from the ProMeter Current in each phase
can be done via this port. 5 volts, 300 mA is availa- All phase - phase voltages
ble for powering a modem. All phase - neutral voltages
The RS232 port can be connected via a serial lead Power factor
or modems to communicate with a computer. Phase angle
The RS485 port can be used to create a local net- Frequency
work, enabling several ProMeters to communicate Active power in each phase
with a computer via one communications channel, Total active power
by addressing individual meters in the network Total reactive power
(multidropping). Total apparent power
2.2.14 Transmit and receive pulse information, These values are calculated each second, based on
alarms etc. data sampled during the previous second. This
Some of the different versions of the ProMeter are means that the instantaneuos values are available
equipped with solid state relay outputs for pulsing for reading with a delay of 1-2 seconds.
or stationary control signals, and opto-isolated pulse
2.2.17 Perform load control
or level sensing inputs.
Predicts end of MD period maximum demand and
These output functions can be freely configured to
disconnects load to keep end of period MD within
provide energy pulses, control signals for tariff control,
the allowed power limits. The calculations are
control signal for load switching, alarm signals, energy
based on basic (non-switchable) load, switchable
direction and a user selectable remote control func-
load and disconnect level. Switching hystereses can
tion. The remote control output function is controlled
be set to avoid switching oscillations.
by sending a command to the ProMeter on a serial
communication link (IEC1107 or RS232/RS485). 2.2.18 Diagnose installation/connection errors
The input functions can be configured for counting Voltage phase sequence and correct connection of
external pulse signals into accumulating registers, the currents can be checked on the display.
used as control inputs for tariff selection, ending
demand period or ending a billing period. 2.2.19 Store event and error messages
Events and error conditions can be stored in an
2.2.15 Front panel LED indicators events and error register. Some of the events to be
The CAL LED is used when performing a calibra- recorded are configurable with the ProWin
tion or checking the meter accuracy. It emits a software. All entries in the register do have a
light pulse frequency proportional to the power number and a description specifying the event or
level, and consequently every pulse corresponds to error that has occurred and when. Some conditions
a certain amount of energy. The constant (pulses can be set to switch on the front panel Alarm LED.
per kWh) can be pre-set. The CAL LED can be Reading and resetting the register can be done on
switched to indicate active, reactive and apparent the display or with the ProWin program. Resetting
energy with the display key. also switches the Alarm LED off.
The Alarm-LED has two functions. When it is
flashing it indicates that an (predetermined) alarm
condition is present. If it is on continuously it indi-
cates that a brown-out condition is present. This
means a serious under-voltage.
The Power LED simply indicates that the ProMe-
ter Power supply is working and the meter is alive.
7
GENERAL DESCRIPTION
2.2.21 Correct for measuring and power 2.3 Characteristics that makes the ProMeter a
transformer errors and losses better meter!
Measuring (instrument) transformers have errors The ProMeter is a fully digital energy meter using
that add to the system inaccuracy. If these errors a powerful microcomputer and an accurate AD-
are known it would be worthwhile to correct for converter to sample the phase voltages and cur-
these errors in order to maintain a better system rents. These samples contain all the information
measuring accuracy, or simply avoid replacing the required to calculate instantaneous quantities like
measuring transformers when upgrading the sys- volts, amps, power, power factor, and phase angle,
tem accuracy. and integrated quantities like active, reactive and
Sometimes the system energy selling point and the apparent energy. All calculations are made numeri-
most convenient or economical position in the cally through the microcomputer software.
system for measuring the energy are not the same. The ProMeter has a large number of features.
For example, the commercial interface for a gene- Which of these and how the features are used, is
rator station selling the energy may be on the HV user selectable. By using the ProWin software the
side of the line transformer. The most economical ProMeter can be tailored to the need of the user
place to measure the energy is on the LV side of for most applications encountered.
the power transformer, because of the cost for
measuring transformers. To measure and sell the
energy in different places in the system requires
some means of accounting for the losses between
these two positions, i.e. the power transformer
losses.
Some versions of the ProMeter can perform these
corrections and compensations for measuring
transformer errors and power transformer losses.
Correction for measuring transformer errors, CT’s
and VT’s can be done for phase angle error and
magnitude error.
Compensation for power transformer losses can be
done for iron losses (magnetisation losses) that are
more or less constant, and copper losses (resistive
losses) that varies as the square of the current.
8
VERSIONS AND TYPE DESIGNATIONS
9
VERSIONS AND TYPE DESIGNATIONS
10
VERSIONS AND TYPE DESIGNATIONS
3.3 Specification
Some of the listed specification data may not apply to certain versions of the ProMeter.
3.3.1 Accuracy
11
VERSIONS AND TYPE DESIGNATIONS
12
VERSIONS AND TYPE DESIGNATIONS
13
VERSIONS AND TYPE DESIGNATIONS
3.3.15 Connection
Current connections max. 25 mm2
Voltage connections max. 4 mm2
Pulse inputs max. 4 mm2
Pulse outputs max. 4 mm2
Serial port RS232 9-pole D-sub
Serial port RS485 9-pole D-sub and D-sub to terminal block adapter.
3.3.16 Dimensions
97,5 mm
3 holes for
175 mm
max M6 screw
257,5 mm
75 mm 75 mm
35 mm 35 mm
B0226
165 mm
150 mm
Weight 2.3 kg
14
WORKING PRINCIPLE
4 Working principle
4.1 Hardware
The ProMeter is a fully digital energy meter, employing analogue-digital (AD-) conversion of the voltages
and currents in the electricity system and calculating all quantities mathematically. The heart of the ProMeter
is a very powerful microprocessor, which handles AD-conversion, calculation, handling and storing data to
various registers, as well as all communications via display, digital I/O and serial communication ports, opti-
cal and/or RS-232/RS485.
OPTIONS
OPTO- CPU EPROM EEPROM RAM DISPLAY REAL TIME RS-232-
PORT CLOCK PORT
INTER- INTER-
FACE FACE
CONTROL INPUTS
A/D
CONVERTER INPUT 1
IL 1
INPUT 2
LOGIC
PULSE-AND
AMPLIFIER
CURRENT
INPUT 3
IL 2
IL 3 OUTPUT 1
OUTPUT 2
CONTROL LOGIC
OUTPUT 3
UL 1
OUTPUT 4
OUTPUT 5
UL 2
AMPLIFIER
OUTPUT 6
VOLTAGE
PROTECTION
CIRCUITS
UL 3
AUX.SUPPLY
B0203
Figure 4.A
15
WORKING PRINCIPLE
4.2 Software
The software in the ProMeter consists of a large number of functionality modules supported by correspon-
ding functionality in the configuration software ProWin. The main software functions are:
CONFIGURATION
Measuring Registers Communication Security Control Information
4.2.1 Measuring
AD- Calibration Transformer Energy Instantaneous Connection
conversion correction correction calculation values analysis
4.2.2 Registers
Accumulating Pulse Tariff Billing Summation Demand Data
energy input registers registers registers values logging
registers registers register
4.2.3 Communication
Local Opto isol. Solid state IEC1107 RS232/485 IEC1107 ProWin
display and pulse and relay serial serial comm. comm.
keys control outputs comm. comm. port protocol protocol
inputs port
4.2.5 Control
Real time clock, calender Load control Remote relay control
4.2.6 Information
Owners name and ID numbers
16
SUPPORT SOFTWARE AND ACCESSORIES
5.2 Accessories
Designation Article number
Opto reading head 7406
Power adapter for opto reading head 7407
RS232-LAN-adapter 7496
RS232 Modem adapter 5V – 9V 7495
Serieal lead RS232 7408
RS485 connection adapter 7403
17
TESTS AND APPROVALS
SP
Box 857
S-501 15 BORÅS
SWEDEN
Tests have also been done in part for the following standards:
• EN61036:1996 (IEC1036) class 1.0
“Alternating current static watt-hour meters for active energy”
• EN61038:1996 Time switches for tariff and load control. Applicable parts according to accuracy requi-
rements for the real time clock.
Test reports:
97F12032 EMC-tests
98F12510 Metrology
18
19
Cewe Instrument AB
Box 1006 • SE-611 29 Nyköping
Tel: +46 155 775 00 • Fax: +46 155 775 97
e-mail: info@ceweinstrument.se
A0002e-2