SUPPLY NETWORK ANALYZER
CVM 96 SERIES
(Power Demand)
(V. 6.12 and higher)
INSTRUCTION MANUAL
( M98132601-03 / 03C)
(c)
CIRCUTOR S.A.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 1
CONTENTS page
1.- DELIVERY SPOT CHECK .......................................................................................................... 2
2.- MAIN FEATURES ....................................................................................................................... 3
3.- INSTALLATION AND START-UP............................................................................................... 5
3.1.- Installation. .................................................................................................................... 5
3.2.- CVM 96 (RS-485) Connection terninal (see lable on the rear part) .............................. 7
3.3.- CVM 96 (RS-232) Connection terninal (see lable on the rear part) .............................. 8
3.4.- Connection drawing for the CVM 96 ............................................................................. 9
4.- OPERATION MODE ................................................................................................................. 13
5.- SETUP PROCEDURE .............................................................................................................. 15
5.1.- Phase-to-Phase or Phase-to-Neutral voltages ............................................................ 16
5.2.- Voltage display mode .................................................................................................. 16
5.3.- Voltage transformation ratio ........................................................................................ 17
5.3.1.- Voltage Transformer Primary ............................................................................... 17
5.3.2.- Voltage Transformer Secondary........................................................................... 18
5.4.- Current Transformer Primary ...................................................................................... 18
5.5.- Setting power demand utility screens.......................................................................... 19
5.6.- Initial screen setting..................................................................................................... 20
5.7.- Setting of the display shutdown time........................................................................... 20
5.8.- Clearing energy counters ............................................................................................ 21
5.9.- THD or D setting..........................................................................................................22
5.10.- Additional screens when RELAY OUTPUTS (2 relays) are equipped ...................... 23
6.- SPECIFICATIONS .................................................................................................................... 30
7.- SAFETY CONSIDERATIONS................................................................................................... 32
8.- MAINTENANCE ........................................................................................................................ 32
9.- TECHNICAL SERVICE ............................................................................................................. 32
10.- CVM 96 COMMUNICATIONS................................................................................................... 33
10.1.- ! To take into account:............................................................................................... 33
10.2.- RS-485 TYPE CONNECTION TO A RS-232 TYPE INPUT OF A PC ...................... 34
10.3.- RS-232 TYPE CONNECTION TO A RS-232 TYPE INPUT OF A PC ...................... 35
10.4.- MODBUS © protocol ................................................................................................ 36
11.- APPENDIX A: Second SETUP of the CVM 96 ........................................................................ 42
----- Supply network analyzer CVM 96 ---------- ------- Page No. 2
1.- DELIVERY SPOT CHECK
This manual is issued to help all the CVM 96 users to install and use it in order
get the best from it. After receiving the unit, please check the following points:
(a) Does this device correspond to your order specifications?
(b) Check if any damage was done during the shipment process.
(c) Verify that it includes the correct instruction manual.
The manual you hold in your hands contains information and warnings
about the CVM 96 that the user should respect in order to guarantee a proper
operation of all the instrument functions and keep its safety conditions.
Before powering the instrument for the first time, verify following points:
(a) Power supply: see rear part of your CVM 96
Standard: 230 V a.c. Single-phase, Frequency: 50 ... 60 Hz
SDC Model : 24 .... 120 V c.c.
Other supply voltages, on request.
(b) Maximum measuring voltage:
Standard: 300 V a.c. phase-neutral / 520 V a.c. between phases
Other models: on request
CVM 96 – measuring 110V: 110 V a.c. phase-to-neutral / 190 V a.c. phase-to-phase
CVM 96 – measuring 500V: 500 V a.c. phase-to-neutral / 866 V a.c. phase-to-phase
(c) Maximum measurable current: Current transformer of In / 5 A a.c.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 3
2.- MAIN FEATURES
The CVM 96 power meter is a programmable measuring instrument, offering
several operation possibilities selectable in its SETUP option. Before power
supplying the instrument, read the CONNECTIONS and SETUP sections and
choose the most suitable operation mode for getting your desired data.
The CVM 96 is an instrument which measures, calculates and displays all the
main electrical parameters at any electrical network (balanced or not). The
measuring is true RMS value, through three a.c. voltage inputs and three a.c. current
inputs (from Current Transformers .../ 5A).
----- Supply network analyzer CVM 96 ---------- ------- Page No. 4
By means of an internal microprocessor it simultaneously measures:
Parameter Symbol L1 L2 L3 Average
Voltage (phase-neutral) V x x x
Voltage (phase-phase) V x x x
Current A x x x xx
Frequency Hz x
Active power kW x x x x
Reactive power L kvarL x x x x
Reactive power C kvarC x x x x
Apparent power xx
Power factor PF x x x x
Cos ϕ
Power demand Pd x
kW h energy x
kvarhL energy x
kvarhC energy x
Neutral current IN xx
Voltage THD % THD- V x x x
Current THD % THD- A x x x
Individual harmonic current
content (Up to the 15
Available: x: Display and communications xx: Communications
th
)
xx
xx xx xx
The CVM 96 delivers the visualization of above listed parameters by means of
three 4-digit, led type, displays. Up to 3 parameters can be simultaneously read in
the screen.
---------------------------------------------------------------------------------------------
OTHER FEATURES
- Low-size (96 x 96 mm), panel-mounting analyzer.
- True R.M.S. measuring system.
- Instantaneous, maximum and minimum values of each measured parameter.
- Energy measurement (indication through a lighting led)
- RS-485 or RS-232 type communication to a PC (optional)
----- Supply network analyzer CVM 96 ---------- ------- Page No. 5
3.- INSTALLATION AND START-UP
The manual you hold in your hands contains information and
warnings that the user should respect in order to guarantee a proper
operation of all the instrument functions and keep its safety
conditions. The instrument must not be powered and used until its
definitive assembly on the cabinet’s door.
Whether the instrument is not used as manufacturer’s specifications, the
protection of the instrument can be damaged.
When any protection failure is suspected to exist (for example, it presents
external visible damages), the instrument must be immediately powered off. In this
case contact a qualified service representative.
3.1.- Installation.
Before powering the instrument for the first time, verify following points:
a.- Power supply: see rear part of your CVM 96
Standard supply : Single-phase 230 V ∼ (a.c.)
- Frequency : 50 - 60 Hz
- Supply voltage tolerance : - 10 % / + 15
- Connection terminal : Terminals 1 - 2 (Power supply)
- Burden : 5 VA
SDC Model : 0.24.... 120 V c.c. ( continua )
- Supply voltage tolerance : - 20 % / + 15
- Connection terminal : Terminals 1 - 2 (Power supply)
- Burden : 2,2 W
On request: other voltages
----- Supply network analyzer CVM 96 ---------- ------- Page No. 6
b.-Maximum voltage at the voltage measuring circuit:
Standard : 300 V a.c. phase-to-neutral / 520 V a.c. phase-to-phase
45 to 65 Hz
On request:
500 V a.c. phase-to-neutral / 866 V a.c. phase-to-phase
110 V a.c. phase-to-neutral / 190 V a.c. phase-to-phase
c.- Maximum allowable current : Current Transformer of In / 5 A a.c.
d.- Operation conditions :
- Operation temperature range: -10 to +50 ºC
- Humidity : 5 to 95 % R.H. non-condensing
e.- Safety : Designed to meet protection class III- 300 V a.c. as (EN 61010).
Mounting:
Instrument is to be mounted on panel (cut-out 92
+0.8
x 92
+0.8
mm, as per DIN
43 700). All connections keep inside the cabinet.
Note that with the instrument powered on, the terminals could be dangerous to
touching and cover opening actions or elements removal may allow accessing
dangerous parts. Therefore, the instrument must not be used until this is completely
installed.
The instrument must be connected to a power supply circuit protected with gl
type (IEC 269 ) or M type fuses rated between 0.5 and 2 A. This circuit should be
provided with a circuit breaker or any equivalent element to connect (ON) or
disconnect (OFF) the instrument from the power supply network. The supply and
measuring voltage circuits will be both connected through a wire with a minimum
cross-section of 1 mm2.
The line of the current transformer secondary will have a minimum crosssection of 2,5 mm2.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 7
3.2.- CVM 96 (RS-485) Connection terninal (see lable on the rear part)
No.
Terminal description
Upper connection terminal
Relay RL1 output
10
Relay RL2 output
11
Relay common
12
Current AL3 - S2 input
13
Current AL3 - S1 input
14
Current AL2 - S2 input
15
Current AL2 - S1 input
16
Current AL1 - S2 input
17
Current AL1 - S2 input
18
Lower connection terminal
*Supply voltage input: 0 V
1
*Supply voltage input:230 Va.c.
2
RS-485 ( + )
3
RS-485 ( - )
4
RS-485 ( GND )
5
Neutral measurement
6
VL3 measurement
7
VL2 measurement
8
VL1 measurement
9
*Lower connection terminal
(SDC Model)
Supply voltage (+) d.c.
1
Supply voltage (-) d.c.
2
NOTE: Terminals 13, 15, 17 are internally connected to the 6 terminal (Neutral)
... / 5 A current inputs are isolated for the ITF model.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 8
3.3.- CVM 96 (RS-232) Connection terninal (see lable on the rear part)
RELAY ALARM
10 11 12 13 14 15 16 17 18
0
RL2
COMRL1
RS-232
230 V
(Tx) (Rx) GND
S2
S2
L3
S1
S1
L2
S1
S2
S2
S1
N
VL3 VL2 VL1
S2
S2
L1
S1
S1
No.
Terminal description
Upper connection terminal
10
Relay RL1 output
11
Relay RL2 output
12
Relay common
13
Current AL3 - S2 input
14
Current AL3 - S1 input
15
Current AL2 - S2 input
16
Current AL2 - S1 input
17
Current AL1 - S2 input
18
Current AL1 - S1 input
Lower connection terminal
1
*Supply voltage input: 0 V
2
*Supply voltage input:230 Va.c.
3
RS-232 (Tx )
4
RS-232 (Rx )
5
RS-232 ( GND )
6
Neutral measurement
7
VL3 measurement
8
VL2 measurement
9
VL1 measurement
*Lower connection terminal
(SDC Model)
1
Supply voltage (+) d.c.
2
Supply voltage (-) d.c.
NOTE: Terminals 13, 15, 17 are internally connected to the 6 terminal (Neutral)
... / 5 A current inputs are isolated for the ITF model.
A
----- Supply network analyzer CVM 96 ---------- ------- Page No. 9
3.4.- Connection drawing for the CVM 96
a.- Three-phase network.- 4 wires (low voltage) :
P2
P1
L1
S1
L2
L3
N
Vl3
S1
P1
VL2
S2
Vl1
P2
S2
P2
S2
Power Supply
C.
1 2 3 4 5 6 7 8 9
Power Supply (Model SDC)
Terminal Description
1
2
+ V c.c.
P1
S1
10 11 12 13 14 15 16 17 18
N
- V c.c.
A
----- Supply network analyzer CVM 96 ---------- ------- Page No. 10
b.-Three-phase network – 3 wires (low voltage):
P2
P1
L1
Power Supply
C.
P2
S2
P2
S2
1 2 3 4 5 6 7 8 9
P1
S1
10 11 12 13 14 15 16 17 18
S1
P1
S2
S1
L2
L3
Vl1
VL2
Power Supply (Model SDC)
Terminal Description
1
2
+ V c.c.
- V c.c.
Vl3
A
A
A
----- Supply network analyzer CVM 96 ---------- ------- Page No. 11
c.- Three-phase network - 3 wires (2 P.T. and 3 C.T.):
Power Supply
C.
P2
S2
P2
S2
1 2 3 4 5 6 7 8 9
P1
S1
10 11 12 13 14 15 16 17 18
S1
P1
P2
S2
S1
P1
L1
L2
L3
B
a
a
b
B
b
Vl1
VL2
Power Supply (Model SDC)
Terminal Description
1
2
+ V c.c.
- V c.c.
Vl3
A
A
A
----- Supply network analyzer CVM 96 ---------- ------- Page No. 12
d.- Three-phase network - 3 wires (2 P.T. and 2 C.T.):
P2
P1
L1
S2
P2
S2
Power Supply
C.
Power Supply (Model SDC)
Terminal Description
1
2
P1
S1
10 11 12 13 14 15 16 17 18
1 2 3 4 5 6 7 8 9
Vl1
Vl2
Vl3
+ V c.c.
- V c.c.
S1
L2
L3
B
a
a
b
B
b
IMPORTANT REMARK! If power = -0.01 is shown for any of the phases and voltage
and current are not zero for this phase, check out following points:
- Assure that L1, L2 and L3 phases coincide in voltage and current.
- Correct polarity? Reverse the current transformer placed at this phase.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 13
4.- OPERATION MODE
The instrument has three displays. Each one has also a LED type indicators
(red colour). Every led will be on according to the parameter presently shown in
screen.
When the CVM 96 is powered up, the display shows " xxxx ", so informing
about the program version and the SETUP. After some seconds, the analyzer is
ready for operation and shows one of the available screens. A led next to the shown
parameter is on.
Parameters on display can be switch by pressing the key . Leds on the
right or left indicate the parameters shown on screen at any moment.
When the first led (red) is on, it means that VOLTAGE values are shown on
screen, that is, the user can read the voltage of the phase L1 (V1), voltage of the
phase L2 (V2) and voltage of the phase L3 (V3).
Whether the key " " is press, the next led will be on, so indicating that for
this screen CURRENT values of each phase are now shown.
Pressing again the key " " , the next led will be on, and the screen will
shown following three parameters, and so successively.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 14
Max
min
Pressing the "max" or "min" key, maximum or minimum values for the
parameters being shown by display, respectively, appear in screen.
This function is only valid while you keep pressing the "max" or "min" key. If
you stop pressing the key the instantaneous values will appear again after 5
seconds.
While showing maximum or minimum values the LED indicators will keep
blinking.
Reset
Pressing the "reset" key the system is reset. This is equivalent to switch off
the power supply of the instrument. The maximum and minimum values recorded will
be automatically deleted from the internal memory.
If you are in the SETUP process and press the "reset" key, you exit it without
saving any modification that you might have done (this event will depend on the
SETUP section that is accessed when the reset action is carried out) and reset of the
system occurs.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 15
5.- SETUP PROCEDURE
The SETUP procedure of the CVM 96 is performed by means of several
SETUP options.
For accessing the SETUP menu the keys max & min must be
simultaneously pressed once the instrument is at the main screen.
When accessing the SETUP, the message "SETUP unloc " (1) is shown for
some seconds on screen, or, otherwise, the message "SETUP loc" (2).
(1) SETUP UNLOC (SETUP unlocked ) : when the SETUP is accessed,
configuration parameters can be either visualized and modified.
(2) SETUP LOC (SETUP locked ) : when the SETUP is accessed,
configuration parameters can be visualized but cannot be modified .
Once into the SETUP, use the keyboard to select different options and enter
required variables:
- The key
- The key MAX permits to select among different options in a menu, or to
increase a digit when a variable is being entered.
- The key MIN permits to move the cursor along the digits.
Different options are following shown in a sequential mode:
1. Choice of visualization of phase-to-neutral or phase-to-phase voltages
2. Voltage display mode
3. Voltage transformation ratio.
4. Value of the current transformer primary : 1 a 10000 A
5. Power demand meter setting
6. Choice of default initial screen
7. Time for display shutdown
8. Deleting energy counters
9. Choice of harmonic distortion determination mode: d% or THD%
10. Setting alarms : RELAY 1 (OUT 1) & RELAY 2 (OUT 2)
validates de value and pass to the next menu.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 16
5.1.- Phase-to-Phase or Phase-to-Neutral voltages
After the word "set" you will see on the three displays the voltages of the
phases L1, L2, L3.
U1 U12
U2 or U23
U3 U31
Phase to Neutral Voltages: U1, U2, U3
Phase to Phase Voltages : U12, U23, U31
a.- To select one of the voltage options just press the green key "max" and both
options will appear alternately.
b.- When you get in the display the desired option just press the " " key to
validate it and access to the next SETUP option.
5.2.- Voltage display mode
This option permits the user to select the voltage display mode. That way, the choice
between viewing the voltage with one decimal digit or without decimals is userprogrammable.
SEt SEt
Udec ó Udec
no YES
No decimals 1 decimal digit
a) To select one of the voltage options just press the green key "max" and both
options will appear alternately.
When you get in the display the desired option just press the " " key to validate it
and access to the next SETUP option.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 17
5.3.- Voltage transformation ratio
5.3.1.- Voltage Transformer Primary
On the screen we read the word "SET U P" followed by 5 digits. They allow us
setting the primary of the voltage transformer.
SET U
P - -
- - -
Last digit of the first display indicates "U" (Voltage) and first digit of the second
display indicates "P" (Primary). It means that we can set the primary of the voltage
transformer. To avoid mistakes the Voltage red LEDs remain lit on.
a) To write or modify the value just repeatedly press the "max" key and the
blinking digit value will be increased.
b) When the value on screen is the proper one, we can pass to the next digit by
pressing the "min" key in order to modify the other values.
c) When the blinking digit is the last one, pressing the "min" key we go back to
the initial value: set values can be again modified.
d) Press"
" to pass to the next SETUP option.
Note: Maximum values of transformation ratios which are allowable to be set,
depend on the full-scale value of the measuring instrument. (see indications
on the rear side lable).
FULL-SCALE
VALUE
MAXIMUM ALLOWABLE
VALUE
110 V~ 99,999
300 V~ 70,000
500 V~ 40,000
- In case that a value higher than the maximum allowable value is validated
"
", the screen will blink and the previous set value will be kept in memory.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 18
5.3.2.- Voltage Transformer Secondary
We can now set the value of the secondary of the voltage transformer. Only three
digits are available:
SET U
S
- - -
Same process than in point 5.3.1:
- "max" key: Allows us modifying the value of the blinking digit. Each time it is
pressed the value is increased.
- "min" key: Allows us the validation of the blinking digit and going to the next one.
- Press "
" to pass to the next SETUP option.
If the CVM 96 is directly connected to the mains (without voltage transformer) the
values of primary and secondary must be the same, for instance 00001/001.
5.4.- Current Transformer Primary
"SET A P" and five digits appear on screen allowing us to set the primary of the
current transformer.
SET A
P - -
- - -
The procedure is the same one done at the previous sections with the "max", "min"
and "
" keys.
- When the last digit blinks, pressing then "min" the first digit is again accessed,
so that set value can be modified if required.
- The secondary of the current transformers is not programmable. It is
automatically set at 5 A (... / 5 A ac)
----- Supply network analyzer CVM 96 ---------- ------- Page No. 19
NOTES:
- The secondary of the current transformers is not programmable. It is
automatically set at 5 A (... / 5 A ac)
- The primary current value to be set is also limited by the following condition:
The maximum allowable primary current value which can be set is defined by
the fact that the multiplication of the primary voltage value by this primary
current value cannot exceed 20,000,000.
5.5.- Setting power demand utility screens.
Push the key " " and the following screens will appear by display:
1.- PARAMETER TO CONTROL ("Pd Code xx")
None
Three phase active power kW III
Three phase apparent power kVA III
Average three-phase current AIII
Current per phase A1 – A2 – A3
00
16
34
36
A-PH
Value of power integrated during the programmed demand period.
2.- DEMAND PERIOD ( 1 to 60 min.) ("Pd Per xx")
3.- CLEAR MAXIMUM VALUE IN MEMORY
("CLr Pd xx") no or YES
Programming mode:
- "max" key: allows choosing the different available options.
- "min" key: allows the validation of the blinking digit and go forward to the next
digit (only for the "Pd Per xx" option).
- To pass to the next option press " ".
If you don't want to modify anything, just press the " " key three times without
modifying any value.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 20
5.6.- Initial screen setting
This option allows choice among fixed or rotary screen:
a.- Fixed screen (choice is switch just pressing
): choice among 10 available
screen of the initial screen to be shown when the CVM 96 is powered (or when the
CVM 96 is reset).
b.- Rotary screens: all 10 screens are successively shown at intervals of 5 s.
This option is noticed by means of some leds:
SET
dEF
PAGE
- The key "max": permits to modify the selected page. The led of the selected option
will be on. Whether rotary screens option is selected, then all leds will be on.
- Press " " to validate the choice.
5.7.- Setting of the display shutdown time
Setting of the period of time to go by, from the moment that the CVM 96
keyboard is not touched anymore, before the CVM display is automatically shut
down (low consumption mode):
dISP
OFF
05
→ Time to shutdown (Minutes)
When the display is shut down, a Led at the bottom left corner of the CVM will
keep blinking. The display will be automatically turned on when any CVM key is
pressed.
- "max" key: to modify the value of the blinking value.
- "min" key: to validate the blinking value and go to the next digit.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 21
5.8.- Clearing energy counters
On display we see "CLR ENER no" (Clear energy counters).
- "max": To select "YES" or "no"
- " ": To validate the choice and pass to the following SETUP option.
Display: If any of the energies is programmed (kWh, kvarhL or kvarhC), it is
displayed as follows:
max
min
kWh
MWh
Wh
Example : If the accumulated energy is 32.534,810 kWh, it will be displayed
as follows:
3 2 MWh
2 5 3 4 kWh
8 1 0 Wh
max
min
2534 kWh
32 MWh
810 Wh
Note : the energy counter range is limited at 999.999.999 Wh , that is, when the
value of 1 GWh is reached, the counter is reset to zero.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 22
5.9.- THD or D setting
SET SET
DHAR or dHAR
d
Thd
Two modes for the harmonic distortion calculation can be selected:
- d % : total value of the harmonic distortion referred to the fundamental value.
- Thd % : total value of the harmonic distortion referred to the R.M.S. value.
The selected option will be the one shown on screen.
a.- To select any option just press "max" to switch between the two available options.
b.- Press "
" to validate the choice. Since all SETUP options have been
completed, the SETUP is exited, all modifications are saved in memory, and the
running mode automatically starts up.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 23
5.10.- Additional screens when RELAY OUTPUTS (2 relays) are equipped
With these outputs the CVM 96...C2 can be set to deliver:
A.- Pulse every certain kWh or kvarh (ENERGY). You can define the value
corresponding to the energy consumed for generating a pulse (0.5 s long): kWh / 1
pulse or kvarh / 1 pulse
B.- ALARM conditions: the parameter to be controlled, the maximum value, the
minimum value and the delay are user-definable for each relay output.
----------------------------------------------------------------------------------
On the CVM 96 screen following messages appear at this SETUP option:
OUT 1 RELAY 1
CODE
00
Parameter No. (1)
Depending on the selected variable we will pass to a.- or b.- sections
In case that no parameter is wanted to be programmed set par. No. = 00.
Parameter Symbol
phase L1
Single voltage V 1
Current A 1
Active power kW 1
Reactive power
Inductive/ Capacitive
Power factor PF 1
% THD V THD V1
% THD A THD A1
kvarL 1
kvarC 1
Code Symbol
phase L2
01
02
03
04
05
25
28
V 2
A 2
kW 2
kvarL 2
kvarC 2
PF 2
THD V2
THD A2
Code Symbol
phase L3
06
07
08
09
10
26
29
V 3
A 3
kW 3
kvarL 3
kvarC 3
PF 3
THD V3
THD A3
11
12
13
14
15
27
30
Code
----- Supply network analyzer CVM 96 ---------- ------- Page No. 24
Three-phase active power kW III
Three-phase inductive power kvarL III
Three-phase capacitive
power
Active energy kWh
Reactive energy (inductive) kvarh. L
Reactive energy (capacitive) kvarh. C
Three phase apparent power kVA III
Power demand Pd
kvarC III
Three-phase current AIII 36
Neutral current IN 37
Three-phase cos ϕ Cos ϕ
16
Three-phase power factor PF III
17
Frequency Hz
18
Ph-Ph voltage L1- L2 V 12
31
Ph-Ph voltage L2 - L3 V 23
32
Ph-Ph voltage L3 - L1 V 31
33
34
Power demand (L1) Pd
35
Power demand (L2) Pd
Power demand (L3) Pd
35*
42*
43*
19
20
21
22
23
24
There are, besides, some parameters that refer to 3 phases at once. In case that any
of these parameter is selected, then the alarm will be activated always one phase
complies with alarm settings.
Parameter Symbol Code
Line-to-neutral voltages V1 or V2 or V3 90
Currents I1 or I2 or I3 91
Active powers kW1 or kW2 or kW3 92
Reactive powers kvar1 or kvar2 or kvar3 93
Power factors PF1 or PF2 or PF3 94
Line-to-line voltages V12 or V23 or V31 95
% THD V THDV1 or THDV2 or THDV3 96
% THD I THDI1 or THDI2 or THDI3 97
----- Supply network analyzer CVM 96 ---------- ------- Page No. 25
a.- If an ENERGY parameter is chosen: kW.h (31), kvarh.L (32) or kvarh.C(33)
OUT 1 RELAY 1
PULS
xxxx
(1) Value of energy in kW : four digits with floating decimal point
kW / pulse (1)
- SETUP procedure:
- "max" key: to modify the value of the blinking value.
Every time it is pressed the value is increased.
- "min" key: to validate the blinking value and go to the next digit.
NOTE : When the last digit is reached, the position of the decimal can be move
point with the "max" key.
Example for setting a 500 W / 1 pulse:
Firstly we enter the value, 0500, and following we place the decimal point at
the right position with the "max" key 0.500 kW.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 26
- For accessing to the next option, press " ": SETUP options for the second relay
will appear (only with CVM 96...-C2).
OUT 2 RELAY 2
CODE
00
Parameter value (2)
Act as before. Pressing again " " the SETUP mode is exited.
b.- ALARM conditions (1 condition for each relay): If any other parameter (1 to 30)
is selected at (1), two outputs can be configured as alarms. For each output it is
possible to set:
Any of the parameters measured by the CVM 96
MAXIMUM value
MINIMUM value
Delay for the conditions
These screens are successively displayed by the CVM 96 once the parameter
has been selected ( for the SETUP of each option proceed as in the Section a.-):
b.1.- Programming the maximum value to be controlled:
OUT 1 RELAY 1
AL hI
0.000
Maximum value
The key "max" will increase the value of the blinking digit (0,1...9, sign -- ).
Use the key "min" to pass to the following digit.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 27
b.2.- Programming the minimum value to be controlled:
OUT 1 RELAY 1
AL LO
0.000
Minimum value
b.3.- Programming the delay:
OUT 1 RELAY 1
SEC Delay in seconds
0.000
maximum 9999 s
THD parameters can also be selected as alarm conditions.
- Press " " to pass to the next option: the SETUP for the second relay is then
shown:
OUT 2 RELAY 2
CODE
00
Proceed as before. Pressing again " " the SETUP option exited.
---------------------------------------------------------------------------
Parameter No. (1)
----- Supply network analyzer CVM 96 ---------- ------- Page No. 28
ALARM ACTIVATION: Alarms operation depend on the set values of MAXIMUM
and MINIMUM.
MIN +
MIN +
MIN --
MIN +
MIN --
MIN --
MAX +
max > min
MAX +
max < min
MAX +
MAX --
MAX --
max > min
MAX --
max < min
ON OFF ON
======
0 Min Max
OFF ON OFF
==============
0 Max Min
ON OFF ON
=======
Min 0 Max
OFF ON OFF
=============
Max 0 Min
ON OFF ON
=====
Min Max 0
OFF ON OFF
================
Max Min 0
ON = alarm activated ----------> relay closed
OFF = alarm deactivated ------> relay open
----- Supply network analyzer CVM 96 ---------- ------- Page No. 29
The DELAY set value is applied either to the connection or the
disconnection when the alarm conditions occur.
User-definable units for the different parameters are:
Parameter Format Example
Voltage With decimals = V (xxxx)
Without decimals = kV (xxx.x)
125.0 = 125 kV
0220 = 220 V
25.30 = 25.30 kV
Current A 0150 = 150 A
Powers kW, kvarL, kvarC 0.540 = 540 W
250.5 = 250.5 kW
Energies kWh, kvarLh, kvarCh
Power factor +/- x.xx - 0.70
Frequency xx.x 50.0 = 50 Hz
Output relay connection lay-out CVM 96...-C2 (2 relays ) :
Out1 Terminals Signal Out2 Terminals Signal
RELAY
1
10 - 12 N.O.
RELAY
2
11- 12 N.O.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 30
6.- SPECIFICATIONS
Power supply : see specifications on the rear part of the CVM 96
- CVM 96 : Single-phase 230 V a.c.
Voltage tolerance: +10 % / -15 %
Frequency: 50 ... 60 Hz
Burden ................................... 5 VA
- CVM 96.... SDC : Direct current 24 V ....... 120 V d.c.
Voltage tolerence: -20 % / +15 %
Burden .................................. 2.2 W
Operation temperature ......... -10 to 50 ºC
Humidity ……………………… 5 to 95 % R.H. non-condensing
Measuring Circuits :
Rated voltage .... 300 V a.c. Phase-to-Neutral / 520 V a.c. Phase-to-Phase
Frequency .................. 45 to 65 Hz
Rated current .............. In / 5 A (isolated inputs)
Permanent overload .....1.2 In
Current input burden .....0.75 VA
Accuracy :
Voltage ...................................... 0.5 % of full scale ± 1 digits
Current ...................................... 0.5 % of full scale ± 1 digits
Powers ...................................... 1.0 % of full scale ± 1 digits
Test conditions :
- Errors due to C.T. are not included and direct voltage measurement
- Temperature between + 5 ºC and + 45 ºC
- Power factor between 0.5 and 1
- Full scale measure range 5 % ... 100 %
----- Supply network analyzer CVM 96 ---------- ------- Page No. 31
Mechanical Characteristics :
- Connection : pluggable connection terminal
- Case material Self-extinguishable, V0 plastic
- Protection Assembled unit (frontal ) : IP 54
Un-assembled unit (side and rear covers) : IP 31
- Dimensions 96 x 96 mm - depth: 100 mm
- Weight 0.520 kg
Relays characteristics: according to model
- Maximum switching load : 750 VA
- Maximum switching voltage : 250 V a.c.
- Maximum switching current : 3 A (Resistive)
- Mechanical endurance : 3 x 107 operations
- Energy / alarms pulses : max. 1 pulse / s
At full load: (250 V a.c. / 3 A )
- Electrical endurance : 1 x 105 operations
- Maximum operation cadence : 450 oper. / hour
- Safety .............. Category III - 300 V a.c. / 520 a.c., as per EN-61010
- Protection against electric shock by class II double-isolation
Standards : IEC 664, VDE 0110, UL 94 , IEC 801 , IEC 348 , IEC 571-1
EN 50081-1, EN 50082-1 , EN-61010-1
Dimensions :
----- Supply network analyzer CVM 96 ---------- ------- Page No. 32
7.- SAFETY CONSIDERATIONS
All installation specification described at the previous chapters
named INSTALLATION AND STARTUP, INSTALLATION MODES
and SPECIFICATIONS.
Note that with the instrument powered on, the terminals could
be dangerous to touching and cover opening actions or elements removal may allow
accessing dangerous parts. This instrument is factory-shipped at proper operation
condition.
8.- MAINTENANCE
The CVM 96 does not require any special maintenance. No adjustment,
maintenance or repairing action should be done over the instrument open and
powered and, should those actions are essential, high-qualified operators must
perform them.
Before any adjustment, replacement, maintenance or repairing operation is
carried out, the instrument must be disconnected from any power supply source.
When any protection failure is suspected to exist, the instrument must be
immediately put our of service. The instrument’s design allow a quick replacement in
case of any failure.
9.- TECHNICAL SERVICE
For any inquiry about the instrument performance or whether any failure
happens, contact to CIRCUTOR’s technical service.
CIRCUTOR S.A. - After-sales service
Vial Sant Jordi, s/n
08232 - Viladecavalls
Tel - + 34 93 745 29 00
fax - + 34 93 745 29 14
E-mail : central@circutor.es
----- Supply network analyzer CVM 96 ---------- ------- Page No. 33
10.- CVM 96 COMMUNICATIONS
One or some CVM 96... can be connected to a P.C.. With this system we can get all
the parameters in one central point of reading. The CVM 96..., has a serial RS-485
or RS-232 type output (according to the model). If we connect more than one device
to the same communication line (RS-485), we have to assign to each of them a
different code or direction (from 01 to 99), since the P.C. needs the identification of
every measuring point.
10.1.- ! To take into account:
- PROTOCOL: MODBUS © (Question / Answer)
- CVM 96 DEFAULT CONFIGURATION : 001 / 9.600 / 8 bits / N / 1 bit
- Available baud rates: 1.200 - 2.400 - 4.800 - 9.600 - 19.200 bauds
- RS-485 type output:
-RS-485 connection will be carried out by means of a twisted and screened
cable, with a minimum of 3 wires, with a maximum distance between the CVM
96 and the last peripheral of 1.200 m. The CVM 96 uses a RS-485
communication bus allowing up to a maximum of 32 devices in parallel
(Multi-point bus) per port used in the PC.
- RS-232 type output:
-RS-232 connection will be carried out by means of a twisted and screened
cable, with a minimum of 3 wires, with a maximum distance between the CVM
96 and the P.C. of 15 m.
----
----- Supply network analyzer CVM 96 ---------- ------- Page No. 34
10.2.- RS-485 TYPE CONNECTION TO A RS-232 TYPE INPUT OF A PC
RS-232
5
DB-9
7
A1
RS-485
7
2
512
5
3
A2
CONVERTER
RS-232 / RS-485
3
2
PC
5
2
1
CVM 96
3 ( + )
4 ( - )
5 GND
CVM 96
*If the conversor RS232/485 with RTS control (code 770208) is used, it is no necessary
to connect the pin 7 on the RS232 side.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 35
10.3.- RS-232 TYPE CONNECTION TO A RS-232 TYPE INPUT OF A PC
DB-9
RS-232
3 Tx
4 Rx
5 GND
CVM 96
CVM-96
5
8
3
CVM-96
CVM 96
7
2
PC
----- Supply network analyzer CVM 96 ---------- ------- Page No. 36
10.4.- MODBUS © protocol
The CVM 96 analyzer can communicate by means of the MODBUS ©
protocol, as it is following described:
When the CVM 96 communicates with MODBUS protocol, it uses the RTU
mode (Remote Terminal Unit ). Each 8-bits byte in a message contains two 4-bits
hexadecimal characters.
The format for each byte in RTU mode is :
* Code : 8-bits binary, hexadecimal 0-9, A-F
Two hexadecimal characters
contained in each 8-bits field of the
message.
* Bits per Byte : 8 data bits
* Error Check Field : Cyclical Redundancy Check ( CRC ) .
MODBUS FUNCTIONS:
FUNCTION 01 Reading of relay state
FUNCTION 3 or 4 Reading of n Words (16 bits-2 bytes). This function
permits to read all the electrical parameters of the CVM
96. Each parameters is a 32-bits long, hence two words
are required to inquiry for a parameter.
( 4 bytes - XX XX XX XX ).
FUNCTION 05 Writing one relay
----- Supply network analyzer CVM 96 ---------- ------- Page No. 37
a.- Registers assigned to different parameters measured by the CVM 96:
PARAMETER
Units
MODBUS REGISTERS
HEXA-DECIMAL (longs)
PRESENT
Value
MAXIMUM
Value
MINIMUM
Value
Phase voltage - V 1 V x 10 00-01 60-61 C0-C1
Current - A 1 mA 02-03 62-63 C2-C3
Active power - kW1 W 04-05 64-65 C4-C5
Reactive power - kvar 1 var 06-07 66-67 C6-C7
Power factor - PF1 P.F. x 100 08-09 68-69 C8-C9
Phase voltage - V 2 V x 10 0A-0B 6A-6B CA-CB
Current - A 2 mA 0C-0D 6C-6D CC-CD
Active power - kW2 W 0E-0F 6E-6F CE-CF
Reactive power - kvar 2 var 10-11 70-71 D0-D1
Power factor - PF2 P.F. x 100 12-13 72-73 D2-D3
Phase voltage - V 3 V x 10 14-15 74-75 D4-D5
Current - A 3 mA 16-17 76-77 D6-D7
Active power - kW3 W 18-19 78-79 D8-D9
Reactive power - kvar 3 var 1A-1B 7A-7B DA-DB
Power factor - PF3 P.F. x 100 1C-1D 7C-7D DC-DD
Three-phase active power
W 1E-1F 7E-7F DE-DF
– kWIII
Three-phase inductive
var 20-21 80-81 E0-E1
power – kvarL III
Three-phase capacitive
var 22-23 82-83 E2-E3
power – kvarC III
Cos ϕ III Cos ϕ x 100
Three-phase power factor
P.F. x 100 26-27 86-87 E6-E7
24-25 84-85 E4-E5
- PF III
----- Supply network analyzer CVM 96 ---------- ------- Page No. 38
PARAMETER
Units
PRESENT
MODBUS REGISTERS
HEXA-DECIMAL (longs)
MAXIMUM
Value
Value
MINIMUM
Value
Frequency (L1) - Hz Hz x 10 28-29 88-89 E8-E9
Line voltage L1-L2 - V12 V x 10 2A-2B 8A-8B EA-EB
Line voltage L2-L3 - V23 V x 10 2C-2D 8C-8D EC-ED
Line voltage L3-L1 - V31 V x 10 2E-2F 8E-8F EE-EF
%THD V 1 % x 10 30-31 90-91 F0-F1
%THD V 2 % x 10 32-33 92-93 F2-F3
%THD V 3 % x 10 34-35 94-95 F4-F5
%THD I 1 % x 10 36-37 96-97 F6-F7
%THD I 2 % x 10 38-39 98-99 F8-F9
%THD I 3 % x 10 3A-3B 9A-9B FA-FB
Active energy – kWh Wh 3C-3D
Inductive reactive energy -
varLh 3E-3F
kvarh L
Capacitive reactive energy -
varCh 40-41
kvarh C
Three phase apparent
kVA III 42-43 A2-A3 102-103
power
Power demand Pd 44-45 A4-A5
Corriente trifásica – AIII mA 46-47 A6-A7 106-107
Neutral current mA 48-49 A8-A9 108-109
Power demand (L1)* Md (Pd) 44-45 A4-A5
Power demand (L2)* Md (Pd) 52-53 B2-B3
Power demand (L3)* Md (Pd) 54-55 B4-B5
* This parameters are only enabled if the maximum demand by line current has been
previously programmed
----- Supply network analyzer CVM 96 ---------- ------- Page No. 39
PARAMETER
Units
MODBUS REGISTERS
HEXA-DECIMAL (longs)
L1 L2 L3
Fundamental mA 1F4-1F5 212-213 230-231
Harmonic 2 % 1F6-1F7 214-215 232-233
Harmonic 3 % 1F8-1F9 216-217 234-235
Harmonic 4 % 1FA-1FB 218-219 236-237
Harmonic 5 % 1FC-1FD 21A-21B 238-239
Harmonic 6 % 1FE-1FF 21C-21D 23A-23B
Harmonic 7 % 200-201 21E-21F 23C-23D
Harmonic 8 % 202-203 220-221 23E-23F
Harmonic 9 % 204-205 222-223 240-241
Harmonic 10 % 206-207 224-225 242-243
Harmonic 11 % 208-209 226-227 244-245
Harmonic 12 % 20A-20B 228-229 246-247
Harmonic 13 % 20C-20D 22A-22B 248-249
Harmonic 14 % 20E-20F 22C-22D 24A-24B
Harmonic 15 % 210-211 22E-22F 24C-24D
NOTE: The maximum number of parameters (1 parameter = 1 word of 32 bits) that can be
read in one transmission is 20.
----- Supply network analyzer CVM 96 ---------- ------- Page No. 40
EXAMPLE
INQUIRY 0A 04 00 00 00 0A 71 76
0A CVM 96 peripheral number, 10 in decimal
04 Reading function
00 00 Initial address (first register)
00 0A Number of registers to be read
7176 CRC character
ANSWER 0A 04 14 00 00 08 4D 00 00 23 28 00 00 0F A0 00 00 00
90 00 00 00 60 CB 2E
0A CVM 96 number , 10 in decimal
04 Reading function – the one use for the inquiry
14 Bytes received (20)
00 00 08 4D V 1x10 (register 00 Hex), in decimal 212.5 V
00 00 23 28 mA 1, in decimal 9000 mA
00 00 0F A0 W 1, in decimal 4000 W
00 00 00 90 varL 1, in decimal 144 varL
00 00 00 60 PF 1 x 100, in decimal 96 PF
CB 2E CRC character
----- Supply network analyzer CVM 96 ---------- ------- Page No. 41
b.- Reading digital outputs (relays) - Function 01 :
Inquiry : PP0100000008CRC (PP = peripheral No.)
Answer : PP0101XXCRC
Where XX (hexadecimal byte) translated to binary
b7 b6 b5 b4 b3 b2
b1 b0
bit b0 = relay 1 ( 1 = ON ; 0 = OFF)
bit b1 = relay 2 ( 1 = ON ; 0 = OFF)
c.- Write of digital outputs
This function is used to force the status of the CVM 96 digital outputs.
Output No. Message Answer
Relay 1
Relay 2
PP050000xx00 CRC
PP050001xx00 CRC
PP050000xx00 CRC
PP050001xx00 CRC
Where: PP peripheral No.
xx 00 Deactivate
FF Activate
----- Supply network analyzer CVM 96 ---------- ------- Page No. 42
11.- APPENDIX A: Second SETUP of the CVM 96
A second SETUP menu is accessible in order to perform the configuration of
the CVM 96 with other features different from factory-supplied ones.
To access this menu proceed as follows:
- Being the CVM 96 powered off, simultaneously press " ", "max" and
"min" keys.
- Holding these keys pressed, powered the CVM 96 on.
Following messages will be then shown on display:
a.- COMMUNICATION PROTOCOL: MODBUS
SET
PROT Protocol:
BUS
MODBUS (c) (BUS) protocol
(*) See related section in this manual
- " " key: to validate the choice and pass to the next SETUP screen:
b.- SETTING COMMUNICATION PARAMETERS
SET
Cdef Default configuration
NO
"max" key to switch from NO / YES
- If YES is chosen: the configuration is 001 / 9600 / 8 bits / N / 1 bit
----- Supply network analyzer CVM 96 ---------- ------- Page No. 43
- If NO is chosen, pressing " " following options successively appear:
- n PER : Peripheral No. 001 to 255
- Baud 1 : baud rate 1.200 – 2.400 – 4.800 – 9.600 – 19.200
- Parity : No, even, odd
- LEN : (length) 8 bits
- Stop bits : 1 or 2
c.- SETUP LOCKING OR UNLOCKING
SET
Up
Unlo
Loc (locked SETUP) or Unloc (unlocked SETUP)
Use the key "max" to modify the choice.
- Whether LOC is set, when the SETUP is accessed, configuration parameters can
be visualized but cannot be modified.
- To modify the previously set option, a 4-figure password is required to be
entered (in case that this password is not correct, this blinks and the previous
menu is again accessed).
PASSWORD : 1234
To exit this SETUP mode, the key RESET can be pressed at any moment
(WARNING: whether the SETUP is exited by pressing the key RESET some last
modification might not be saved in memory) or reach the end of this SETUP mode.
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