Hioki FT4310, Инструкция по эксплуатации, Страница: 67 / 72

Appx.
1
Appx.
Appx. 1 Measurement Principles
Measurement Principles for Bypass Diodes with
an Open Fault
1
Measure a short-circuit current of a solar panel
2
Apply current to a solar panel
Applied current (I
B
) = Short-circuit current (I
A
) + 1 A current
• If short-circuit current (I
A
) < applied current (I
B
), the bypass diode is
working correctly (OK).
• If short-circuit current (I
A
) = applied current (I
B
), the bypass diode has
an open fault.
Applied current
N ( - ) P ( + )
P
N
V
B
N ( - ) P ( + )
P
N
I
A
I
B
N ( - ) P ( + )
P
N
P
N
P
N
Pass: I
A
< I
B
False: I
A
= I
B
Bypass diode
Normal
Open fault
Short-circuit current Applied current
1
2
Appx.
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2
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4
5
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7
Appx.
Index