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CVM-MINI
User Manual
26 pgs1.51 Mb0

CIRCUTOR CVM-MINI User Manual

POWER ANALYZER
CVM-MINI SERIES
INSTRUCTION MANUAL
M98174001-01-05A
CIRCUTOR, SA
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 Protection of data Set-up using password............................................................. 21
5 APPENDIX – CVM-MINI-ITF-HAR-RS485-C2 SERIES .......................................................... 22
6 MODBUS RTU PROTOCOL .................................................................................................... 22
6.1 MODBUS memory map ............................................................................................. 23
6.2 RS485 Connection diagram ....................................................................................... 26
7 TECHNICAL SERVICE ............................................................................................................ 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 I transformers.
/1A or IN /5A secondaries from external measurement
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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.
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
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
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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
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.
equipment's protection may be compromised.
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
/5A: 6.0 amperes
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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.
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 The secondary line for the current transformer shall have a minimum diameter of 2.5
2
.
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 (-)
S2
P2
S1
P1
S2
P2
S1
P1
S2
P2
P1
Ali
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e
n
tac
ionPower Supply
S2P2S1
P1
S2P2S1
P1
S2
P2S1P1
b
B
a
A
b
BaA
b
B
a
AbBaA
S2
P2
S1
P1
S2P2S1
P1
Alim
e
n
tacionP
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2.2.2 Connection diagrams
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S1
L1
L2
L3
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Figure 2. [4-wire / 3-wire - Low Voltage] Figure 3. [2 voltage transformers -
L1
L2
L3
3 current transformers]
L1
L2
L3
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
THD
PF Pd
C
I
OS
Hz
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L1
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2(2(2(2
L2
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2(2(2(2
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L3
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Figure 5. CVM-MINI
2(2(2(2(22
Figure 6. CVM-MINI display - LCD SEGMENTS
clear
clear
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
Nsetup
energy
max Pd
min
max
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. 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. 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). 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. 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. Pressing in runtime mode, maximum variable values are displayed. In Set-up mode it has the function of increasing 1 digit cyclically (from * to 3), or selecting between two possible preset configurations (for example: s_m or hi).
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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