Hioki FT4310, Инструкция по эксплуатации, Страница: 68 / 72

Appx.
2
Measurement Principles
Measurement Principles for Bypass Diodes with a
Short-circuit Fault
1
Measure an open-circuit voltage of a reference solar panel
(= reference voltage)
2
Measure an open-circuit voltage of another solar panel
(= measurement object voltage)
• If reference voltage (V
A
) = measurement object voltage (V
B
),
the bypass diode is working correctly (OK).
• If reference voltage (V
A
) > measurement object voltage (V
B
),
the bypass diode has a short-circuit fault.
N
(
-
)
P
(
+
)
P
N
V
B
N
(
-
)
P
(
+
)
P
N
A
B
V
A
V
B
N ( - ) P ( + )
P
N
N (
-
) P (
+
)
P
N
N (
-
) P (
+
)
P
N
B B
Pass: V
A
= V
B
False: V
A
> V
B
Bypass diode
Normal Short-circuit fault
Reference panel Another panel
1
2