Circutor CVM-MINI SERIES, CVM-MINI-ITF-HAR-RS485-C2, CVM-MINI-ITF-Plus-RS485-C2, CVM-MINI-Shunt, CVM-MINI-ITF Instruction Manual
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POWER ANALYZER
CVM-MINI SERIES
INSTRUCTION MANUAL
M98174001-03-19A
CIRCUTOR, SA
Page 2 of 26
CONTENTS
1 BASIC INSTRUCTIONS .............................................................................................................. 3
1.1 Checks on receipt. ............................................................................................................ 3
1.2 Main features ................................................................................................................... 3
1.3 Electrical parameters ........................................................................................................ 3
1.4 Other features .................................................................................................................. 4
1.5 Available models ............................................................................................................. 4
2 INSTALLATION AND START-UP ............................................................................................... 5
2.1 Installation ...................................................................................................................... 5
2.1.1 Power supply voltage .................................................................................................. 5
2.1.2 Maximum voltage in the voltage measurement circuit ................................................... 5
2.1.3 Maximum permanent current in the current circuit ........................................................ 5
2.1.4 Transistor output features ............................................................................................ 5
2.1.5 Temperature probe features ......................................................................................... 5
2.1.6 Operating conditions .................................................................................................. 6
2.1.7 Safety ........................................................................................................................ 6
2.2 Start-up ........................................................................................................................... 6
2.2.1 Description of terminals .............................................................................................. 6
2.2.2 Connection diagrams .................................................................................................. 7
3 OPERATING MODE .................................................................................................................... 7
3.1 Keypad ........................................................................................................................... 8
3.2 Default settings ................................................................................................................ 8
3.2.1 Default display ........................................................................................................... 9
3.2.2 LED Indicators......................................................................................................... 10
4 SETTING SET-UP ...................................................................................................................... 10
4.1 Measurement Set-up ....................................................................................................... 10
4.1.1 Transformation Ratios .............................................................................................. 11
4.1.1.1 Voltage primary value ........................................................................................ 11
4.1.1.2 Voltage secondary value ..................................................................................... 11
4.1.1.3 Current primary value ......................................................................................... 11
4.1.1.4 Current secondary value ..................................................................................... 12
4.1.2 Measurement in 2 or 4 quadrants ............................................................................... 12
4.1.3 Power demand meter parameterisation ....................................................................... 13
4.1.3.1 Integrated parameter ........................................................................................... 13
4.1.3.2 Integration period ............................................................................................... 13
4.1.3.3 Clearing power demand meter value .................................................................... 14
4.1.4 Display and backlight ............................................................................................... 14
4.1.4.1 Selection of screens to be displayed ..................................................................... 14
4.1.4.2 Selection of start page ........................................................................................ 14
4.1.4.3 Backlight (Backlit display).................................................................................. 15
4.1.5 Clearing energy meter values .................................................................................... 15
4.1.6 Setting THd or d ...................................................................................................... 15
4.1.7 Digital output for the transistor (2) ............................................................................. 15
4.1.7.1 Impulse per n KW·h or Kvar·h consumed or generated ......................................... 16
4.1.7.2 Alarm condition ................................................................................................. 16
4.2 Communication Set-up ................................................................................................... 19
4.2.1 Default settings ........................................................................................................ 19
4.2.2 Peripheral number .................................................................................................... 20
4.2.3 Transmission speed .................................................................................................. 20
4.2.4 Parity ...................................................................................................................... 20
4.2.5 Data bits .................................................................................................................. 21
4.2.6 Stop bits .................................................................................................................. 21
4.2.7 Protection of data Set-up using password ................................................................... 21
5 APPENDIX – CVM-MINI-ITF-HAR-RS485-C2 SERIES .............................................................. 22
6 MODBUS RTU PROTOCOL ...................................................................................................... 23
6.1 MODBUS memory map ................................................................................................. 23
6.2 RS485 Connection diagram ............................................................................................ 26
7 TECHNICAL SERVICE ............................................................................................................. 26
Page 3 of 26
1 BASIC INSTRUCTIONS
This manual is designed to familiarise the user with operating the CVM-MINI power
analyzer in order to get the best from its features.
1.1 Checks on receipt.
Please check the following points on receipt of the analyzer:
• The equipment delivered matches your order specifications.
• Check that the equipment has not been damaged during delivery.
• Check that it has the correct instruction manual.
This manual contains information and warnings about the CVM-MINI
analyzer which must be followed to guarantee the proper operation of all
instrument functions and to maintain it in a safe condition.
Installing and maintenance for this analyzer must be carried out by a
qualified person.
1.2 Main features
The CVM-MINI panel analyzer is a programmable measuring instrument; it offers a
series of options for using it, which may be selected from configuration menus on the
instrument itself. Before starting the analyzer carefully read sections: power supply,
connection and setting and select the most suitable form of operation in order to obtain
the required data.
The CVM-MINI measures, calculates and displays the main electrical
parameters for three-
phase, balanced or unbalanced industrial
systems.
Measurements are taken in true effective value using the three
alternating and neutral voltage inputs and three current inputs to
measure IN /1A or IN
/5A secondaries from external measurement
transformers.
Figure 1. [CVM-MINI]
The CVM-MINI allows the display of all electrical parameters, using the backlit LCD
display, showing three instant electrical parameters, maximum or minimum on each
page jump.
1.3 Electrical parameters
By using its internal processor, the CVM-MINI shows on the screen and through
communication (according to model), over 100 parameters, which may be either singlephase or three-phase. These parameters may or may not be displayed on the screen,
according to the equipment’s preset values.
Page 4 of 26
PARAMETER
UNIT
L1
L2
L3
III
Phase-neutral voltage
V f-n
• • • Phase-phase voltage
V f-f
• • •
Current
A
• • •
••
Frequency
Hz
•
Active power
kW
• • •
•
Reactive power L
kvarL
• • •
•
Reactive power C
kvarC
• • •
•
Apparent power
kVA
• • • • Power factor
PF
• • • • Cos ϕ
Cos ϕ
•
Maximum demand
Pd
• • •
•
Neutral current
IN
•
Voltage THD
% THD - V
• • •
Current THD
% THD - A
• • •
kWh (consumption and generation)
W·h
•
kvarh.L (consumption and generation)
W·h
•
kvarh.C (consumption and generation)
W·h
•
kVAh (consumption and generation)
W·h
•
Harmonic content (V and A) *
%
• • •
15th
Temperature
ºC
•
( • ) Available through display and communications.
( •• ) Only available through communications.
( * ) Harmonic content in HAR model.
1.4 Other features
• A small sized instrument with a 85x52x70mm (3 steps).
• Measurement in true effective value (TRMS).
• Instant, maximum, minimum values for each parameter.
• Energy measurer function.
• 1 GW·h counter in consumed energy.
• 100 MW·h counter in generated energy.
• Backlit LCD display.
• Built in RS485 communications (Modbus RTU®).
• Temperature probe built in the equipment.
1.5 Available models
CODE
REFERENCE
Ci r c
ut or
UER1 .0 0
M52000
CVM-MINI-Shunt
M52010
CVM-MINI-ITF
M52021
CVM-MINI-ITF-RS485-C2
M52031
CVM-MINI-ITF-HAR-RS485-C2
M52022
CVM-MINI-ITF-Plus-RS485-C2
Page 5 of 26
2 INSTALLATION AND START-UP
This manual contains information and warnings about the analyzer which must be
followed to guarantee the proper operation of all instrument functions and to maintain it
in a safe condition. The analyzer must not be switched on until it is finally connected to
the electrical board.
If the equipment is handled in a way not specified by the manufacturer, the
equipment's protection may be compromised.
When it is likely that the equipment has lost its protection (i.e. with visible damage), it
must be disconnected from the auxiliary supply. In this event, contact a qualified
technical service representative.
2.1 Installation
The following features must be taken into consideration before supplying power to the
equipment:
2.1.1 Power supply voltage
Standard model power supply: Single-phase 230 V AC.
Plus model power supply: 85…265 V AC. / 95…300 V DC.
Frequency: 50 Hz … 60 Hz
Power supply tolerance: -15 % / +10%
Connection terminals: 14 - 15
Equipment consumption: 3 VA
2.1.2 Maximum voltage in the voltage measurement circuit
Voltage: 300 V ∼ AC. phase-neutral
520 V ∼ AC. phase-phase
Frequency: 50 Hz … 60 Hz
2.1.3 Maximum permanent current in the current circuit
In scale IN /1A: 1.2 amperes
In scale I
N
/5A: 6.0 amperes
2.1.4 Transistor output features
Type NPN transistor: Opto-insulated / Open Collector
Maximum operating voltage: 24 V DC.
Maximum operating current: 50 mA
Maximum frequency: 5 impulses / second
Impulse length: 100 ms
2.1.5 Temperature probe features
The CVM-MINI has a built in temperature sensor. The sensor has a ± 2ºC
accuracy and a temperature measurement range of -10ºC +50ºC.
The interior temperature of the CVM-MINI has been estimated at 14.0 ºC above
the interior of the cabinet where it has been installed, if the cabinet has no
ventilation. If the cabinet has forced ventilation then the temperature of the CVM
is 3.5 ºC higher.
Page 6 of 26
2.1.6 Operating conditions
Operating temperature: -10 ºC / +50ºC
Relative humidity: 5 to 95 % RH (without condensation)
Altitude: Up to 2000 metres
2.1.7 Safety
Designed for category III installations, 300 V ∼ AC (EN 61010).
Class II double insulation against electric shock protection.
2.2 Start-up
The equipment is mounted on a DIN rail 46277 (EN 50022). All connections must
remain inside the electrical board.
Note that when the instrument is switched on, the terminals may be dangerous
when touched and opening or removing parts may access dangerous areas.
Therefore, the equipment must not be used until it is properly installed.
The equipment must be connected to a power supply circuit protected with gl (IEC 269)
or type M fuses between 0.5 and 2 A. It must have an overload/short circuit switch or
equivalent device in order to disconnect the equipment from the power supply system.
An earth leakage switch or similar device must be fitted to disconnect the equipment
from the power supply system. The power supply circuit and the voltage measurement
circuit are connected with a cable with a minimum diameter of 1 mm
2
.
The secondary line for the current transformer shall have a minimum diameter of 2.5
mm
2
.
2.2.1 Description of terminals
TERMINAL
TERMINAL DESCRIPTION
1
Current input AL1 - S1
2
Current input AL1 - S2
3
Current input AL2 - S1
4
Current input AL2 - S2
5
Current input AL3 - S1
6
Current input AL3 - S2
7
Transistor output RL2
8
Common transistor output
9
Transistor output RL1
10
Measurement VL3
11
Measurement VL2
12
Measurement VL1
13
Neutral V measurement
14
Power supply voltage input
15
Power supply voltage input
A
RS-485 (+)
S
RS-485 (GND)
B
RS-485 (-)
Page 7 of 26
2.2.2 Connection diagrams
S2
P2
S1
P1
L1
L2
L3
N
S2
P2
S1
P1
S2
P2
S1
P1
N
Alimentacion
Power Supply
S2
P2
S1
P1
L1
L2
L3
S2
P2
S1
P1
S2
P2
S1
P1
b
B
a
A
b
B
a
A
L1
L2
L3
b
B
a
A
b
B
a
A
S2
P2
S1
P1
S2
P2
S1
P1
Alimentacion
Power Supply
Figure 2. [4-wire / 3-wire - Low Voltage]
Figure 3. [2 voltage transformers -
3 current transformers]
Figure 4. [2 voltage transformers -
2 current transformers]
3 OPERATING MODE
When power is supplied to the CVM-MINI, the equipment will start its software interface
on the screen showing the version of the firmware and its setting. After a few seconds
the equipment is ready to operate and shows all available screens.
Once started the power analyzer will display the programmable electrical parameters
via the measurement Set-up. If there is no previous setting, the analyzer will display the
voltage between phase and neutral for L1, L12 and L1
Ci r c
ut or
UER1 .0 0
Figure 5. CVM-MINI
-
-
-
8 .8 .8 .8
8 .8 .8 .8
8.8.8.8.88
L1
L2
L3
THD
PF
OS
C
I
N
Pd
kvVArCh
Hz
Figure 6. CVM-MINI display - LCD SEGMENTS
Page 8 of 26
3.1 Keypad
The keypad comprises a total of seven silicon buttons which are used to set the
equipment. Some buttons have a rapid access function, i.e. entering the Set Up
interface is not required. Only the rapid access key needs to be pressed to run the
function.
Only three of the seven buttons may be pressed when the upper cover is down. This is
because the remaining five keys have a high risk factor if they were to be accidentally
pressed.
KEY
FUNCTION
resetN
Starting the equipment and clearing maximum and minimum values
for all instant parameters. Pressing the Reset
key is equivalent to
starting the equipment in the absence of voltage.
Nsetup
Using a long press, after starting the equipment (in the absence of
voltage, or after pressing the Reset key), Communication Set-up is
accessed. Here the
RS485 port parameters may be set and all
communication and measurement parameters may be blocked
using a password.
Using a long press, after starting the equipment (runtime mode),
Measurement Set-up
is accessed. Each and every parameter for
measurement may be changed.
clear
energy
Rapid access function; using a long press (pressed for 5 seconds),
all enabled energy counters are cleared (kW·h / kvarL·h / kvarC·h /
kVA·h in power consumption or consumption and generation).
max Pd
clear
Rapid access function; using a long press (pressed for 5 seconds),
the Power demand parameter previously set in Measurement Set-
up is cleared (Power demand) (kW III / kV·A III / A III / A ph).
Displaying all electrical variables by repeated presses, in runtime
mode. In Set-up
mode has the function of advancing the setting
screens.
min
Pressing in runtime mode, displays the minimum value of displayed
variable/s. In Set-up
mode it has the function of moving 1 digit
sideways.
max
Pressing in runtime mode, maximum variable values are displayed.
In Set-up
mode it has the function of increasing 1 digit cyclically
(from 0 to 9
), or selecting between two possible preset
configurations (for example: yes or no).
3.2 Default settings
The CVM-MINI Analyzer has a factory setting for display, communication and
measurement. For this reason and due to the fact that this default setting is not valid in
nearly all cases, the user must properly set-up the display, measurement and
communication in accordance with the installation’s requirements.
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