ABB PVS-100-TL-B-SY2 Product Manual page 152

Check sequence:
Negative to ground (PE)
First point Second point
CH1 positive CH1 negative
CH2 positive CH2 negative
CH3 positive CH3 negative
CH4 positive CH4 negative
CH5 positive CH5 negative
CH6 positive CH6 negative
Before to carry out the following operations it is required to have successfully completed the
voltage absence test on all the incoming DC line
In case of absence of voltage (respect to the ground) check there is no
voltage on the all DC branches coming from the photovoltaic field (using
the voltage detector), measuring between the all points: CH positive / CH
negative.
- Measure points on the positive string fuses board
19
CH1 positive
CH3 positive
CH5 positive
- Measure points on the negative string fuses board
20
CH1 negative
CH3 negative
CH5 negative
11. DC string fuses test
Multimeter preparation
- Set the multimeter to measure resistance (Ω)
- Insert the black test probe into the COM jack.
- Insert the red test probe into the V/Ω jack.
- Keep the multimeter's test probes separated: check the multimeter's
display shows OL.
- Put in short circuit the test probes: check the multimeter's display shows 0Ω.
Test the DC fuse
- Place the test probes across the fuse (positive and negative) to check
- The expected value is 0Ω.
- 152 -
8 - Maintenance
19
PE
CH2 positive
CH4 positive
CH6 positive
20
PE
20
CH2 negative
CH4 negative
CH6 negative