Fluke 1744 Manual Do Utilizador

  

53 

Active power P 

As per EN 61036, class 2 

Distorting power D 

As per EN 61268, class 2 (A-version only) 

Max value 

Highest value per interval 

Min value 

Smallest value per interval 

Phase uncertainty 

< 0.3 degrees 

Conditions Conductor 

centered 

within clamp jaws or 

Flexi Set 

V

m

, I

m

, THDV, THDI per IEC/EN 61000-4-7, class B 

Voltage harmonics (function A) 
intrinsic uncertainty: 

For V

m 

< 3% V

N

: < 0.15% V

N

 

For V

m

 ≥ 3% V

N

: < 5% V

m

 

Current harmonics (function A) 
intrinsic uncertainty 

For I

m

 < 10% I

N

: < 0.5% I

N

 

For I

m

 ≥ 10% I

N

: < 5% I

m

 

THDV (function A) intrinsic 
uncertainty at V

N

 

For THDV < 3%: < 0.15% 

For THDV ≥ 3%: < 5% 

THDV (function P) intrinsic uncertainty
at V

N

 

For THDV < 3%: < 1%  

For THDV ≥3%: < 5% 

THDI (functions A, P) intrinsic 
uncertainty at I

I

 

For THDI < 3%: < 2% 

For THDI ≥ 3%: < 5% 

Frequency 

42 classes for 10 s mean values 

Ripple-control signals 

Interharmonics 

21 classes for 3 s mean values 

Analysis of logging data 

Programming and analysis is done by PQ Log software on PC.