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----- Analyzer of power supply quality CAVA-251 / CAVA-252 / CAVA-253 -------  Page  No.    5 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

-  OTHER FEATURES  

 

Low size instrument. 

True R.M.S. measuring mode. 

Recording of maximum and minimum value. 

Led for communication indication. 

Led for indication of recording process state (Store on/Store off) 

Capture of voltage sags and voltage dropouts. 

Measurement of harmonic distortion (THD or D). 

Measurement of Flicker.  

 

3.- CAVA MODELS 
 

Different CAVA models are available according to measured and recorded 

parameters:   
 

CAVA Model 

 

Features 

 

7 71 091  CAVA-251 

Voltage Q Voltage 

7 71 092  CAVA-252 

Voltage Q V Current 

7 71 093  CAVA -253 

Voltage Q V Power 

 

Voltage Quality involves detection of voltage sags and voltage dropouts, as 

well as, harmonic distortion and flicker measurement. 

 

 

Содержание CAVA-251

Страница 1: ...ANALYZER OF POWER SUPPLY QUALITY CAVA Series 251 252 253 USER S MANUAL M98120201 03 03A c CIRCUTOR S A...

Страница 2: ...measured and calculated 6 4 2 Parameters referred Power Supply Quality 7 4 2 1 Harmonics 7 4 2 2 Flicker 7 4 2 3 Voltage sags 8 4 2 4 Voltage dropouts Error Marcador no definido 4 2 5 Percentage of V...

Страница 3: ...ntrol of the quality of L V power systems You are kindly requested to carefully read this manual before connecting and powering the analyzer in order to avoid irreversible damage which might be caused...

Страница 4: ...tion instructions Before powering and connecting the analyzer check the following points a Supply voltage 230 V a c 15 b Frequency 50 60 Hz c Maximum measurable current according to the ammeter clamp...

Страница 5: ...d by means of a P C Before powering the analyzer please carefully read sections referred to CONNECTIONS AND SET UP to choose the most appropriate operation mode for your requirements The CAVA measures...

Страница 6: ...ltage sags and voltage dropouts Measurement of harmonic distortion THD or D Measurement of Flicker 3 CAVA MODELS Different CAVA models are available according to measured and recorded parameters CAVA...

Страница 7: ...Vn Vrms 1 2 T u dt t Vrms 1 2 1 N u N CURRENT RMS value CAVA 252 CAVA 253 In Irms 1 2 T i dt t Irms 1 2 1 N i N ACTIVE POWER CAVA 253 Pn 1 T u t i t dt P 1 1 N u i N POWER FACTOR of each phase PF1 PF...

Страница 8: ...ty Pst RMS Flicker WA Value of the Flicker RMS that is defined as the average result of the weighted Flicker value due to each frequency N n n N weighted Flic FT V dV n Flic RMS 1 2 2 1 ker ker Severi...

Страница 9: ...s The CAVA is also equipped with a counter to give the number of cycles within the last period where a voltage dropout has occurred The CAVA will also provide the number of intervals these voltage dro...

Страница 10: ...x x Current x x Apparent power x Active power x Reactive power x Power Factor x Electric parameters Frequency x x x No of cycles x x x Voltage sags Voltage dropouts Intervals x x x No of cycles x x x...

Страница 11: ...ected to exist or external damages are observed the instrument must be immediately put out of service Contact then with a qualified service representative 6 1 Installing the CAVA Before powering and c...

Страница 12: ...mp otherwise no power value will be recorded by the CAVA 253 Hold Run led This led indicates several operation modes Whether the led is quickly blinking a reset action is being carried out Whether the...

Страница 13: ...s See section 6 2 The position of this switch is only considered when powering up the analyzer 7 1 Communications Setup procedure and data retrieval can only be performed through the RS 232 serial por...

Страница 14: ...fault to provide the average value of the voltage for a period of one second If required this integration time can be modified just setting at this option the desired period is seconds Voltage thresho...

Страница 15: ...d frequency The rated frequency of the monitored power system must be set to obtain right data when measuring instantaneous values Time constant for frequency measurement CAVA 252 CAVA 253 The CAVA is...

Страница 16: ...ture range 0 to 50 C Current measurement according to ammeter clamp Accuracy class Voltage 0 5 or readout Current 0 5 or readout Powers 1 or readout Test conditions for accuracy determination Ammeter...

Страница 17: ...nce 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 maintena...

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