Voltech AT3600 - Page 383

VOLTECH AT3600 USER MANUAL SPECIFICATION
SPECIFICATION VPN 98 - 024 PAGE 8.1.25.
PHAS TEST
The accuracy is given as:
where
A
T
is the total accuracy (°)
A
R
is the basic relative accuracy (°)
A
C
is the calibration accuracy (°)
A
V
is the correction for voltage level (°)
A
N
is the correction for turns ratio (°)
The value of A
R
is given in the table in section 1.1 of this chapter.
The values of the other factors are given below.
where
F
M
is the measurement frequency (Hz)
V
P
is the measured voltage across the primary winding (V)
TR is the turns ratio between the primary and secondary windings
A=
C
0.000005% x
F
M
A=
V
0.002 ((1 / VTRV
P P
) + ( / ))
A=
N
0.05 ( - ( / | VVTR
P P
) ) |
A = A
T
R
CV
N
+A +A +A