Watt And Strw Tests - Voltech AT5600 User Manual

C H A P T E R 1 0 – S P E C I F I C A T I O N S
10.2.15.
The accuracy of the applied test voltage is 2%.The measurement accuracy is
based on the chosen test conditions, and is given by:
where:
where:
where:
and:
where:
AT5600 User Manual 98-119 issue 14

WATT and STRW Tests

�� = �� + �� + �� + ��
�� �� �� ��
A is the total accuracy (%)
T
A is the basic relative accuracy (%)
R
A is the calibration accuracy (%)
C
A is the correction for voltage level (%)
V
A is the correction for current level (%)
I
A is the correction for power factor (%)
PF
�� = 0.30 % ������ �������� ���� 1.00 % ������ ��������
��
0.001 %
�� = 0.80 % + (
��
����
0.01 %
�� = 0.05 % + (
��
��
��
0.01 %
�� = 0.05 % + (
��
��
��
√ ( 1 − ����
�� = 1.0 % ∗ (
����
����
F is the test frequency (Hz)
M
V is the measured voltage (V)
M
I is the measured current (A)
M
PF is the power factor of the load
��
���� =
����
W is the measured power (W)
VA is the product of test voltage and magnetizing current
+ ��
�� ����
)
)
) + (1.0 % ∗ ����)
2
)
)
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