CIRCUTOR CVM96 User Manual

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.