Circutor CIRWATT B 500 User manual

INSTRUCTION MANUAL
Multifunction three-phase meter
CIRWATT B 500
(M98239001-03-22A)

2
CIRWATT B 500
Instruction Manual

3
Instruction Manual
CIRWATT B 500
SAFETY PRECAUTIONS
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
Follow the warnings described in this manual with the symbols shown below.
If you must handle the unit for its installation, start-up or maintenance, the following should be
taken into consideration:
Incorrect handling or installation of the device may result in injury to personnel as well as damage to
the device. In particular, handling with voltages applied may result in electric shock, which may cause
death or serious injury to personnel. Defective installation or maintenance may also lead to the risk of
fire.
Read the manual carefully prior to connecting the device. Follow all installation and maintenance in-
structions throughout the device’s working life. Pay special attention to the installation standards of
the National Electrical Code.
Refer to the instruction manual before using the device
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result
in injury or damage to the device and/or installations.
CIRCUTOR S.A.U. reserves the right to modify features or the product manual without prior notification.
DISCLAIMER
CIRCUTOR S.A.U. reserves the right to make modifications to the device or the unit specifications set
out in this instruction manual without prior notice.
CIRCUTOR S.A.U. on its web site, supplies its customers with the latest versions of the device specifi-
cations and the most updated manuals.
www.circutor.com
CIRCUTOR S.A.U. recommends using the original cables and accessories that are sup-
plied with the device.

4
CIRWATT B 500
Instruction Manual
CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................6
SYMBOLS...............................................................................................................................................................................6
1  VERIFICATION UPON RECEPTION....................................................................................................................................7
2  PRODUCT DESCRIPTION .................................................................................................................................................7
2.1 - METER VERSIONS.....................................................................................................................................................8
2.2 - METROLOGY.............................................................................................................................................................9
2.3 - PARAMETERS MEASURED .......................................................................................................................................9
2.4 - NOMINAL, MAXIMUM AND MINIMUM OPERATING CONDITIONS .............................................................................9
2.4.1 - ELECTRICAL PARAMETERS................................................................................................................................9
2.4.2 - ENVIRONMENTAL PARAMETERS .......................................................................................................................9
2.5 - BUILD CHARACTERISTICS....................................................................................................................................... 10
2.5.1 - GENERAL ......................................................................................................................................................... 10
2.5.2 - ENVIRONMENTAL CHARACTERISTICS ............................................................................................................ 10
2.5.3 - VOLTAGE BRIDGES .......................................................................................................................................... 10
2.5.4 - SEALS.............................................................................................................................................................. 10
2.5.5 - WIRE COVER DEPENDING ON VERSION....................................................................................................... 10
2.5.6 - TERMINAL COVER DEPENDING ON VERSION................................................................................................11
2.5.7 - TERMINAL BOX.................................................................................................................................................11
2.6 - DATA DISPLAY .........................................................................................................................................................11
2.7 - VERIFICATION PULSES........................................................................................................................................... 13
2.8 - BUTTON ................................................................................................................................................................. 13
2.9 - RATING PLATE........................................................................................................................................................ 13
2.10 - ENCLOSURE.......................................................................................................................................................... 14
2.11 - CONNECTIONS ...................................................................................................................................................... 14
2.12 - AUXILIARY CONTACTS (DEPENDING ON VERSION) .............................................................................................. 14
2.12.1 - VERSION WITH TARIFF INDICATOR OUTPUT ................................................................................................. 14
2.12.2  VERSION WITH PULSE INPUT....................................................................................................................... 14
2.12.3  VERSION WITH LEAKAGE CURRENT MEASUREMENT ................................................................................. 14
2.12.4  VERSION WITH OPTOCOUPLER OUTPUT...................................................................................................... 14
2.13 - REAL-TIME CLOCK ............................................................................................................................................... 15
2.14 - RESERVE POWER.................................................................................................................................................. 15
2.15 - OPTICAL COMMUNICATIONS PORT ..................................................................................................................... 15
2.16 - RS-232/RS-485 COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION) ........................................ 15
2.17 - ETHERNET COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION) ................................................... 15
2.18 - RESET................................................................................................................................................................... 15
2.19 - CONTRACTS.......................................................................................................................................................... 15
2.19.1 - NUMBER AND ALLOCATION OF CONTRACTS ................................................................................................ 16
2.19.2  CONTRACT PARAMETERS............................................................................................................................. 16
2.20 - CLOSE OF BILLING PERIOD.................................................................................................................................. 17
2.21 - MAXIMETER.......................................................................................................................................................... 18
2.22 - DEFINED, ACTIVE AND LATENT CONTRACTS ....................................................................................................... 18
2.23 - CONTRACT MODIFICATIONS................................................................................................................................. 18
2.23.1 - MODIFYING AN ACTIVE CONTRACT............................................................................................................... 19
2.23.2  MODIFYING A LATENT CONTRACT............................................................................................................... 19
2.23.3  DELETION OF CONTRACTS........................................................................................................................... 19
2.24 - LOAD CURVE ........................................................................................................................................................20
2.25 - POWER EXCESSES ...............................................................................................................................................20
2.26 - EVENTS ................................................................................................................................................................20
2.27 - DAYLIGHT SAVING TIME ....................................................................................................................................... 21
2.28 - SECURITY............................................................................................................................................................. 21
2.28.1 - TAMPER DETECTOR....................................................................................................................................... 21
2.28.2  PROTECTING THE INFORMATION STORED IN MEMORY .............................................................................. 21
2.28.3  SEALS ........................................................................................................................................................... 21
2.29 - MEASUREMENT VALIDATION CRITERIA...............................................................................................................22
2.29.1 - TIME SYNCHRONISATION WITH DRIFT > T1 = 30 SECONDS.........................................................................22
2.29.2 - TIME SYNCHRONISATION WITH DRIFT > 5 MINUTES..................................................................................22

5
Instruction Manual
CIRWATT B 500
2.29.3 - COMMUNICATIONS FAILURE BETWEEN METER AND ANALYSER................................................................22
2.29.4  SUPPLY FAILURE IN AT LEAST ONE PHASE.................................................................................................23
2.30 - APPLICABLE REGULATIONS ................................................................................................................................23
3  CALCULATIONS IN THE METER.....................................................................................................................................24
3.1 - EFFECTIVE VOLTAGE...............................................................................................................................................24
3.2 - EFFECTIVE CURRENT.............................................................................................................................................24
3.3 - APPARENT POWER CALCULATION.........................................................................................................................24
3.4 - ACTIVE POWER CALCULATION...............................................................................................................................24
3.5 - REACTIVE POWER CALCULATION ..........................................................................................................................24
3.6 - POWER FACTOR CALCULATION..............................................................................................................................24
3.7 - MAXIMUM DEMAND...............................................................................................................................................24
3.8 - ENERGY CALCULATION..........................................................................................................................................25
3.9 - QUALITY OF SERVICE.............................................................................................................................................25
3.9.1 - INTRODUCTION ...............................................................................................................................................25
3.9.2 -LINE VOLTAGE OUT OF RANGE........................................................................................................................25
3.9.3  POWER SUPPLY INTERRUPTIONS..................................................................................................................26
4  OPERATION OF THE METER ..........................................................................................................................................27
4.1 - NAVIGATION AND DISPLAY MODES ........................................................................................................................27
4.1.1 - Standby Mode ..................................................................................................................................................27
4.1.2 - Read Mode .......................................................................................................................................................27
4.2 - DEFINITION OF SCREENS........................................................................................................................................28
4.2.1 - Standby Mode screen......................................................................................................................................28
4.2.2 - MENU Screens.................................................................................................................................................29
4.2.3 - SPECIAL FUNCTIONS ...................................................................................................................................... 40
5  COMMUNICATIONS........................................................................................................................................................42
5.1 - RS-232 COMMUNICATIONS....................................................................................................................................42
5.2 - RS-485 COMMUNICATIONS ...................................................................................................................................42
5.3 - ETHERNET COMMUNICATIONS ..............................................................................................................................43
6  EXPANSION MODULES ..................................................................................................................................................44
6.1 - CONNECTION FOR POWER SUPPLY MODULE.........................................................................................................44
6.2.- GROUND LEAKAGE MEASUREMENT .....................................................................................................................45
6.3.- 6 DIGITAL OUTPUTS ..............................................................................................................................................45
6.4.- 2 DIGITAL INPUTS AND 4 DIGITAL OUTPUTS ........................................................................................................45
7  PARAMETERISATION AND READING SOFTWARE .........................................................................................................46
8  INSTALLATION AND STARTUP.....................................................................................................................................47
8.1 - INSTALLING THE DEVICE........................................................................................................................................47
8.2 - METER CONNECTION DIAGRAM.............................................................................................................................48
9  TECHNICAL FEATURES..................................................................................................................................................49
10  MAINTENANCE AND TECHNICAL SERVICE.................................................................................................................. 51
11  GUARANTEE ................................................................................................................................................................. 51

6
CIRWATT B 500
Instruction Manual
REVISION LOG
Table 1: Revision log
Date Revision Description
06/21 M98239001-03-21A
Manual design modification
Changes in the following sections:
2.1.- 2.4.2. - 2.9.- 6.- 9.
03/22 M98239001-03-22A Changes in the following sections:
2.- 2.1. - 2.5.1.- 2.18.- 2.26.- 2.29.2.- 2.29.3.- 2.30.- 6.1.- 8.1.
Note: The images of the devices are for illustrative purposes only and may differ from the original
device.
SYMBOLS
Table 2: Symbols.
Symbol Description
In accordance with the relevant European directive.
Device covered by European Directive 2012/19/EC. At the end of its useful life, do not discard of
the device in a household refuse bin. Follow local regulations on electronic equipment recycling.
Direct current.
~Alternating current.

7
Instruction Manual
CIRWATT B 500
1  VERIFICATION UPON RECEPTION
Upon reception of the device check the following points:
a) The device meets the specifications described in your order.
b) The device has not suffered any damage during transport.
c) Perform an external visual inspection of the device prior to switching it on.
If any problem is noticed upon reception, immediately contact the transport com-
pany and/or CIRCUTOR's after-sales service.
2  PRODUCT DESCRIPTION
The CIRWATT Type B is a three-phase static meter for class 1 active energy measurement, according
to IEC 62052-11 and IEC 62053-21, and class B active energy measurement according to EN 50470-1
and EN 50470-3, according to RD 244/2016 and measurement of reactive energy class 0.5, 1 or 2 (IEC
62053-23) with the possibility of GSM/GPRS, Ethernet, RS232 and RS485 communications.

8
CIRWATT B 500
Instruction Manual
2.1 - METER VERSIONS
The following table shows all the possible options that are available for the CIRWATT Type B.This table
is generic, meaning that some versions listed in it may not currently be available
Table 3: Meter versions.
TYPE OF METER Direct
triphasic BT
Indirect
triphasic BT
4 wires   4Type of connection
Class 0.2s Active/Class 0.5 Reactive 02
Accuracy
Class C Active (Class 0.5s)/Class 1.0 Reactive 05
Class B 1.0 Active/Class 2.0 Reactive   10
3x57/100V L
3x63.5/110V M
Measurement voltage
3x127/220V   N
3x230/400V   Q
3x127/220V… 3x230/400V U
3x57/100V... 3x230/400V V
Transformer 1(2) A T1
Current measurement
Transformer 2.5(10) A T2
Transformer 5(10) A T5
Transformer 1(6) A T7
Transformer 1(10) A T8
Transformer 0.5(0.6) A T9
Direct 10(100) A D1
Direct 5(100) A D6
50Hz A
Frequency60Hz   B
Automatic (50/60 Hz)   C
No communications 0
Communications
RS232/RS232   7
RS485/RS485   8
RS232/RS485   9
RS232/Ethernet   A
RS232/Prime   B
RS485/Ethernet   C
RS485/Prime   D
No inputs/outputs   0
Expansion
Auxiliary power supply   6
Ground leakage measurement   B
2 digital inputs and 4 digital outputs   D
6 digital outputs   E
Small industry/domestic /Residential model   BModel
2 Quadrants   0
Number of quadrants
4 Quadrants   1
Energy accumulation in any direction   2
No added features   0Extra features
Example: The code 402MT5A90B10 would be for a standard Type B 502 counter, Class 0.2s for active
and Class 0.5 for reactive; with an asymmetric connection in 4 quadrants 50 Hz; with power/measure-
ment voltages of 3 x 63.5/110V and 5(10) A for current measurement; with RS232 and RS485 commu-
nications; 4 quadrants and with no expansion module or extra features.

9
Instruction Manual
CIRWATT B 500
2.2 - METROLOGY
The metrological features for the CIRWATT type B Three-phase (TBT) are:
• The current sensor is of the current transformer type.
• Range of currents:
Table 4: Range of currents.
Range of currents
Model 505 (... / 5A) Active Class C (0.5s)
Itr 0,250
Ist 0,005
Imin 0,050
In/ I ref 5,000
Imax 10,000
Model 502 (... / 5A) Active Class 0.2s
Ist 0,005
Imin 0,050
In/ I ref 5,000
Imax 10,000
2.3 - PARAMETERS MEASURED
The meter is able to measure the following parameters:
• Active energy imported, exported and reactive in all four quadrants.
• Active and reactive power.
• Effective voltage and current
• cos φ
2.4 - NOMINAL, MAXIMUM AND MINIMUM OPERATING CONDITIONS
2.4.1 - ELECTRICAL PARAMETERS
Reference voltage (Uref): 3x57/100 V to 3x230/400 V (depending on version)
Operating voltages:
minimum: 80% Uref
maximum: 120% Uref
Reference frequency: 50-60Hz
Power absorbed per phase: < 2 W; <10 VA for Ib, Uref (no auxiliary features)
2.4.2 - ENVIRONMENTAL PARAMETERS
Minimum temperature: -25 ºC
Maximum temperature: +70 °C; 95% relative humidity (without condensation).

10
CIRWATT B 500
Instruction Manual
2.5 - BUILD CHARACTERISTICS
2.5.1 - GENERAL
The meter has a class-II protective insulating enclosure and double insulation.
As specified in Directives 2002/96/EC and 2002/95/EC, none of the materials or substances specified
therein are used.The materials used are fire retardant, halogen free and emit low quantities of opaque,
toxic or corrosive fumes.
The operation of the device is not affected by the presence of external magnetic fields.
The meter manufacturer guarantees a service life for the device of at least 15 years at a temperature
of 35 °C.
2.5.2 - ENVIRONMENTAL CHARACTERISTICS
The meter:
Degree of protection provided by enclosures Code IP51, CEI 60529:2001 standard.
It is protected against salt spray, UNE-EN 60068-2-11:2000 standard.
It is UV resistant, UNE-EN 60068-2-5:2000 standard.
2.5.3 - VOLTAGE BRIDGES
The bridge separates the voltage and current circuits internally, making it impossible to manipulate
them externally.
In the indirect and semi-indirect connection models, the voltage and current circuits are separated
galvanically.
2.5.4  SEALS
The cover and base socket of the meter are closed, making it impossible to open them or insert foreign
objects without breaking the enclosure. It also has the seals required by regulation, both on the meter
cover, as well as on the sealable key and the terminal cover.
2.5.5 - WIRE COVER DEPENDING ON VERSION
The meters have an opaque cover over the top of the terminal box, the fixing screws and the connection
conductors.
The bottom part of the cover is designed in such a way that it can be easily broken to allow the wires
to be partially exposed whilst protecting the access to the terminals.
The meter has a sensor that detects the opening and closing of the wire cover.This detection is always
enabled, even if the meter is not powered.
The meter has a DB9 connector on the wire cover for a local connection via an electrical serial port.

11
Instruction Manual
CIRWATT B 500
2.5.6 - TERMINAL COVER DEPENDING ON VERSION
The meters have an opaque cover over the top of the terminal box and the fixing screws.The meter has
a sensor that detects the opening and closing of the terminal cover. This detection is always enabled,
even if the meter is not powered.
2.5.7 - TERMINAL BOX
Screws
The screws are mixed, allowing the use of Phillips and flat head screwdrivers.The fastening is done with
two screws, which are designed not to strip during the various tightening and loosening operations
that can take place over the life of the meter.
Terminals
All the terminals are indelibly numbered on the front, from left to right, indicating the purpose of the
conductor on the rating label located on the meter enclosure.
Auxiliary terminals
They are located higher up than the main terminals and numbered from left to right starting with 21.
2.6 - DATA DISPLAY
Data is shown on an LCD display that is specially designed for this application. On it, you can view all
the information, such as: energy meters, electrical parameters, status indicators, etc.
Code line
Data line
Quadrant
Active lines / Current direction
Active tariff
Alarm
Alarm description
Communications
Reactive
Circuit breaker
Units
Figure 1:LCD.
Code line. It shows the code that encodes the variable displayed in the data line.
Data line. Area that displays information about electrical parameters, information on the meter, etc.
Units. Unit of the parameter being displayed.
Indicators. The meter uses the second line of the display to show the indicators on every screen. The
format is as follows:

12
CIRWATT B 500
Instruction Manual
the active quadrant (Q1,Q2,Q3,Q4)
L1+L2+L3+, indicates the presence of voltage on each phase with its corresponding sing of
intensity:
"+" is used to show the power absorbed from the mains.
"–" is used to show the power transferred to the mains.
" " the absence of a sign is used to indicate that there is no load.
PX, indicates the active period at any given time.
,It indicates that there is an alarm. The alarm type can be checked on the L40 screen.
When a critical alarm is triggered, the device will display the message "ALARM" in the top line in
the Standby State. The various screens have to be accessed using the read button. Depending on
the type of alarm, the letters C, N or Bwill be shown:
C: Critical alarm, due to an internal or external problem that directly affects the measurement.
This will be flashing.
N: Non-critical alarm, does not affect the measurement but it does affect the operation of the
meter. This will be flashing.
B: Battery-low alarm. This will be flashing.
, will have three possible states:
Off, when there are no communications. This is the default status.
Steady on,once the meter is associated.
Flashing, there are two cases:
•Continuous periodic flashing, indicates that the communications module in the meter
is working correctly during the association process, but it is not yet associated with the
concentrator. The flashing period lasts 2 seconds, 1 second on and 1 second off.
•Short double flashing, indicates that the meter has a connection and is associated. The
shutdown time is 0.3 seconds.

R
, indicates that the LED verifies the reactive measurement. Not available in three-phase
energy meters

kvarh
,indicates open circuit breaker due to power control (PC) actuation. Not available in
three-phase energy meters.

13
Instruction Manual
CIRWATT B 500
2.7 - VERIFICATION PULSES
The device has two verification LEDs, one for verifying the active energy and another for the reactive
energy.
The weight of the LEDS depends on the version of the meter, and is 20,000 imp/kWh (kVArh).
The LEDs remain on when the current is lower than the meter's starting current. Once the starting
current is exceeded (due to the presence of either active or reactive power consumption), the LEDs
turn off and emit pulses proportional to the energy measured, as per the rate indicated on the rating
label.
Both LEDs have metal rings and a profile to set and help position the verification head.
2.8 - BUTTON
It relies on two keys with a short and long press system. A short press is one lasting less than 2 seconds,
and a long press is one lasting more than 2 seconds. The effect of pressing each key depends on the
version of the meter. One of the keys is sealed to prevent unauthorised personnel from operating the
meter.
2.9 - RATING PLATE
The rating plate is located on the front of the meter and contains the specifications required in IEC
62052-11:
Manufacturer's identification mark and place of manufacture
Type designation and certification markings.
The number of phases and the number of conductors in the circuit to which it can be connected
(e.g., three-phase 4 wires)
Serial number of the meter (9 numeric characters), unique number for each meter.
Year of manufacture, year in which the meter was manufactured.
Reference voltage, in the form of the rated voltage of the mains or the secondary voltage of the
measuring transformer to which the meter is to be connected.
Reference current and maximum current, for example 10(100) A would be a meter with a base
current of 10 A and a maximum current of 100 A.
Reference frequency in Hz.
The meter constant is the pulse ratio of the active/reactive energy and defines the flashing
frequency of the LED.
Meter class index
The double square symbol , since the meter has a class-II protective insulating enclosure.
Designation of the number and the arrangement of the measuring elements.
Bar code as per EN 207010 identifying the meter.
Model identifier. Manufacturer's code used to identify the meter model. This code yields its
configuration: power supply, current measurement, measurement system, etc.

14
CIRWATT B 500
Instruction Manual
Temperature range: - 25 °C to + 70 °C.
Minimum current.
Additional metrology marking.
CE marking.
2.10 - ENCLOSURE
The dimensions of the enclosure of the CIRWATT, as well as its anchor points, are in accordance with
the DIN 43859 and DIN 43857 standards.
2.11 - CONNECTIONS
Laser marking on the meter enclosure. Contains a figure showing the electrical connections. When
necessary, a brief installation manual is also included to facilitate the start-up process.
2.12 - AUXILIARY CONTACTS (DEPENDING ON VERSION)
The meter may have a series of auxiliary contacts with varying functions depending on the version.
2.12.1  VERSION WITH TARIFF INDICATOR OUTPUT
The meter has a relay output (250 V and 5 A ~) indicating the activation of the tariff that has been
programmed into it.
2.12.2 - VERSION WITH PULSE INPUT
The meter will have a maximum of 4 inputs for counting pulses from other devices, such as water and
gas meters. The minimum pulse width time that the meter can detect is 30ms, and the maximum rate
it can read is 8 pulses per second.
The inputs are self-powered at + 5V, with a maximum current of 8 mA per input. As a result, a voltage
must never be applied to the inputs; rather, it must be a potential-free contact.
2.12.3  VERSION WITH LEAKAGE CURRENT MEASUREMENT
The meter will have an input for connecting an external transformer of the Circutor WN series,which
will allow reading the differential current (leakage) present in the installation.
2.12.4  VERSION WITH OPTOCOUPLER OUTPUT
The meter has optocoupler outputs to emit pulses based on the energy recorded.The maximum voltage
that can be applied is 24 V DC.

15
Instruction Manual
CIRWATT B 500
2.13 - REAL-TIME CLOCK
The meter has a real-time clock capable of keeping the date and time with a drift of less than 0.5
seconds/day, as specified in the UNE EN 61038 standard.
The clock maintains this accuracy whether it is powered from the mains or by its own battery.
2.14 - RESERVE POWER
The meter has a battery that allows the clock to remain operational in real time. This battery is not
removable and is sized to supply power for 5 years without plugging in the meter. When the meter is
plugged in, the battery consumption is zero. The use of laser-sealed batteries minimises the amount
of self-discharge, which makes it possible to guarantee the battery for the 20 years of the meter's
useful life.
2.15 - OPTICAL COMMUNICATIONS PORT
Every version of the device has an optical serial communications port, as per the IEC 62056-21:2003
standard. The communications port is fully compatible with the optical ports approved by the leading
electricity companies.
On the surface of the cover there is a profile for properly attaching and placing the optical heads.
2.16 - RS-232/RS-485 COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION)
The meter can have RS232 or RS485 serial communications. Up to two completely independent
channels may be available, with speeds of 9600 to 38400 bauds.
2.17 - ETHERNET COMMUNICATIONS BLOCK (OPTIONAL DEPENDING ON VERSION)
The CIRWATT Type B can be connected to an Ethernet network, thus providing direct access to the
meter via IP.
2.18 - RESET
Local reset is disabled.
2.19 - CONTRACTS
In addition to the basic measurements, the device must carry out a set of calculations to ensure proper
billing, which gives rise to the concept of "contract".
A contract refers to the set of parameters that structure how the measurement to be taken by the
analyser is processed in order to reflect the contractual billing agreements.

16
CIRWATT B 500
Instruction Manual
2.19.1  NUMBER AND ALLOCATION OF CONTRACTS
The meter has three contracts defined.
2.19.2  CONTRACT PARAMETERS
A parameter is considered to be defined if it has an assigned value, and undefined if it is blank.
A parameter that is not used cannot have any value assigned from previous parameterisations, and
thus it will remain undefined.
Activation date
Date from which the meter – analyser has to use the contract parameters to calculate the data nec-
essary for billing.
Season
Season refers to each period of time into which a calendar year can be divided and during which the
billing conditions associated with it do not vary. The maximum number of seasons is 4.
Two types of seasons are considered:
Winter/Summer Season. They split the year into two unique seasons bounded by the dates of the
official time change. No parameterisation of any kind is needed and they are automatically adjusted
each year.
Defined seasons. Each season begins on a specific date, the end of which is the start date of the
next season, chronologically, regardless of the year. Each season is identified by a number starting
with 1, which increases by one unit, up to a maximum of 4.
Types of days
The days of the year are classified as:
Working.
Holidays.
A working day is Monday through Friday. They are all subject to the same tariff over the course of a
season.
A holiday is any Saturday, Sunday and any other days specified as such. They are all subject to the
same tariff over the course of a season.
Public holidays other than Saturdays and Sundays will be identified by date, the format of which may
contain wildcards.
Tariff periods. Type of day
A tariff period refers to each time block during which a specific tariff is applied. For the regulated mar-
ket and ATR, these periods are defined annually by the government. There may also be other periods
agreed on a contractual basis between a Customer and the Marketer. There will be a minimum of one
time block and a maximum of six. Each period is identified with an increasing number, starting with 1.

17
Instruction Manual
CIRWATT B 500
Type of day
The type of day refers to the set of tariff periods allocated to each of the 24 hours in a day.
Each type of day is identified using a number starting with 1 and increasing by one for successive types.
Working days and holidays have a type of day associated with them for each season. Every special day
has a type of day associated with it.
Power
Each tariff period has an associated power, which corresponds to the value of the power contracted
in each period. It forms the calculation basis for billing the excess power demanded from the mains.
If this parameter is not defined for any tariff period, this will be taken to mean that there is no power
contracted by period, meaning the excess power will not be calculated. If the power is defined for at
least one tariff period, the remaining periods for which it is not defined will be assumed to have a zero
power defined, meaning the excess power will be calculated based on all the periods.
2.20 - CLOSE OF BILLING PERIOD
The billing period is closed when, at a given time, the following values are stored in a memory register:
Values indicated by the energy totalizers at a given time. (absolute reading)
Energy values measured from the previous close or from the start-up of the meter, if it is the first
close. (incremental reading)
The measurements and calculations to be stored are as follows:
 Absolute and incremental values of active energy.
 Absolute and incremental values of inductive and capacitive reactive energy.
 Calculation of the 15-minute maximum average active power.
 Calculation of excess power.
The closings are based on the total measurements and all the tariff periods of the active contracts.
Each closing has a date and time associated with it. A minimum parameterisable time, expressed in
minutes, must elapse between two consecutive closings. By default, this time is 10 minutes.
The meter – analyser keeps a record of the last 12 closings of each of the contracts that it has, ar-
ranged chronologically from most recent to oldest.
The types of closings are:
Immediate closing. Closing that is done at any time by way of a manual command using a button
or a communications message. The power values used are those recorded through the end of the
15-minute integration period immediately prior to when the command is given. The energy values
used are those indicated by the totalizers when the command is received. Closing using the button
affects all active contracts, whilst closing using a communication message can affect one or more
active contracts.
Automatic closing. These are programmable parameters that specify the date on which each
contract is automatically closed. The date may contain wildcards for the month and year. This type

18
CIRWATT B 500
Instruction Manual
of closing can affect one or more active contracts.
An extraordinary immediate closing is automatically done in the following cases:
Change in transformation ratio. Affects every contract.
Change of power contracted by period. Affects the modified contract.
Change of season or type of day. Affects the modified contract.
2.21 - MAXIMETER
The maximum refers to the highest value of average active power demanded in a 15-minute period in
the time between two consecutive billing period closings.
The 15-minute periods will coincide with the integration periods of the 15-minute load curve; that is,
for each hour, they will start at minute 0, 15, 30 and 45, ending when the next period begins.
The maximums are associated with each of the tariff periods defined and with all the periods as a
whole. Each of these values is stamped with the date, time and minute when it was recorded.
The 15-minute periods where a synchronism event, an outage or a power restoration occurs, or that
have an invalid bit, change in parameters or a tamper event, will not be considered for the purposes of
calculating the maximum.
2.22 - DEFINED, ACTIVE AND LATENT CONTRACTS
A contract is said to be defined when at least the seasons and the types of day are defined.
A defined contract is active when it is being used to do the calculations necessary for billing.
The three-phase TB meter allows for latent contracts. The purpose of latent contracts is to allow the
parameters of the active contract to be modified at some date before it goes into effect. A contract
goes from latent to active on its activation date, even if the device is not powered or when it is initial-
ised after power is restored.
Once the activation date of a latent contract is reached, the analyser has to automatically close out
the immediate extraordinary billing cycle of the affected contract.The parameters defined in the latent
contract will be incorporated into the active contract, the parameters of the latent contract become
indefinite, and the contract that had been latent until that time will be deleted.
If there is an active contract and contracts other than the existing one are defined and activated, at the
time of activation, the information recorded will not be altered and the data on all the active contracts
will be displayed and stored.
2.23 - CONTRACT MODIFICATIONS
A contract is modified when a parameter that was previously defined in a contract is defined, changed
or deleted.
The modification may affect an active contract or a latent contract (if any). Although the parameters
of a contract comprise a unique set, the modifications may be made partially and independently, by
groups of parameters. These groups are determined by the consistency that must exist between them.

19
Instruction Manual
CIRWATT B 500
If the group of power is modified, it may also be necessary to modify the group of seasons and types
of days beforehand, in order to maintain consistency. The groups are:
Holidays (up to 15).
Power.
Automatic billing closing date.
Seasons (4) and types of days (6).
The modification is done for complete groups, such that the existing parameters are deleted and re-
placed by those defined in the modification.
Modifying the Powers, Periods and Types of Days groups results in the billing cycle being closed before
the modification is implemented. If the two groups are modified in a single operation, only one billing
close occurs. The rest of the groups are immediately implemented and do not generate any closings.
If the modification involves a reduction in billing periods, when it is activated and the billing cycle is
closed, the behaviour of the meter – analyser will be as follows:
Store in memory and make available for display the records of the closings made until that time.
Store the values of the global totalizer and those whose period number is still active. From then
on, the global totalizer and the totalizers for the periods whose number is maintained with the new
definition will be displayed and continue to increase, whilst those that were deleted will stop being
recorded and displayed.
If contract modifications are made that involve expanding the billing periods, when they are activated,
the billing will be closed out and the information recorded until that moment and the values of all the
totalizers will be stored. The totalizers for the new periods start from an initial value of zero, and the
existing totalizers increase from their previous value.
2.23.1  MODIFYING AN ACTIVE CONTRACT
The modification of an active contract may affect one or more groups of parameters. Its activation
will be immediate. Depending on the parameters and before they can change, the billing cycle of the
affected contract will be automatically closed.
2.23.2  MODIFYING A LATENT CONTRACT
The modification of a latent contract may affect one or more groups of parameters and does not gen-
erate any automatic closing.
If the activation date is prior to the current date, it will behave as a modification of an active contract
and will not take into account said activation date.
If a modification is made with an activation date different from the existing one and after the current
date, the date of the last modification received is regarded as the new activation date.
2.23.3  DELETION OF CONTRACTS
The deletion of a contract consists of setting all the defined parameters as undefined and no longer
displaying that contract's data on the screen.

20
CIRWATT B 500
Instruction Manual
If more than one contract has been defined and is active and one of them is deleted and the rest are
maintained, at the time of deletion, the billing for the contract to be deleted is closed out. From that
moment on, the information pertaining to the deleted contract is erased and no information on it can
be displayed, except for that pertaining to the closed billing periods that may exist. The remaining
contracts and the corresponding totalizers are not modified.
2.24 - LOAD CURVE
The analyser has two load configurable curves. Registration depth in both cases is 4000, and the in-
tegration period can be fully configured by the user. With a 1-hour integration period, it is possible to
store more than 5 months in each load curve.
In the case of voltage failures, or if the clock is moved forward, any gaps in the load curve are filled
with invalid zeros.
An incremental load curve value that does not completely correspond to the hour in which it is included
is marked as invalid. For example, if it is a value that corresponds to the consumption of several hours.
If the load curve request asks for parameters that the device has not recorded, it will reply to the re-
quest with the parameters that it has recorded and will send zero and invalid for those that it does not
have recorded.
The resolution in both cases is 6 digits for the energy values measured in kWh or kVArh (the same as
the one in the meter display). Any change in the recording period of the load curve results in the load
curve being initialised.
2.25 - POWER EXCESSES
They are calculated based on the average power in the last 15 minutes and on the contracted power,
as per RD164/2001.
Equation 1: Excess power.
Where:
Pdj = power demanded in each of the period's 15 minutes iin which it was exceeded Pci
Pci = power contracted in the period iin the period in question.
2.26 - EVENTS
The dates of every setup change, battery replacement, time change, billing period closings, etc., are
recorded.
The meter is capable of storing up to 200 records . The data organisation within the file is rotational.
Except for FW update events, which cannot be overwritten. This means that once the memory is full,
the new data will overwrite the older data. This system ensures that the meter always has up-to-date
information that corresponds to the latest data obtained.