Voltech AT3600 - Page 365

VOLTECH AT3600 USER MANUAL SPECIFICATION
SPECIFICATION VPN 98 - 024 PAGE 8.1.7.
TR TEST
The accuracy is based on the test conditions chosen to measure the turns ratio, and is
given as:
where
A
T
is the total accuracy (%)
A
R
is the basic relative accuracy (%)
A
C
is the calibration accuracy (%)
A
PV
is the correction for primary voltage level (%)
A
PS
is the correction for secondary voltage level (%)
A
N
is the correction for the turns ratio value (%)
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.
A
C
= 0.1% + (0.00003% x F
M
)
A
PV
= 0.1% + (0.01% / V
PM
)
A
SV
= 0.1% + (0.01% / V
SM
)
A
N
= 0.1% + (0.1 / N
M
)
where
F
M
is the measurement frequency (Hz)
V
PM
is the measured primary voltage (V)
V
SM
is the measured secondary voltage (V)
N
M
is the measured turns ratio (primary / secondary)
TRL TEST
The accuracy for the test is given as:
SPT AAA +=
where:
A
T
is the total accuracy (%).
A
P
is the accuracy of the primary winding measurement (%).
A
S
is the accuracy of the secondary winding measurement (%).
To determine the values of A
P
and A
S
use the accuracy specification for series
inductance.
A = A
T
R
CPVSVN
+A +A +A +A