2018.01 / a
9
Electric Power Generation
Installation and maintenance
R121
AVRs
5657 en -
8 - MULTIMETER CHECKS
Equipment: Digital multimeter
Select Diode mode on the digital multimeter.
The resistance between F1 and F2 (with the
multimeter jack common applied to F1 of the
AVR) should be between 0.4 and 0.6 V, and
vice versa (with the multimeter jack common
applied to F2 of the AVR) should give
INFINITY
.
ZERO
indicates a power device failure in
both cases, No further tests (static or
dynamic) are allowed, as they would lead to
the fuse blowing.
The resistance between F2 and U (both
sides) should be greater than 200 Kohms.
ZERO
indicates a power device failure in
both cases, No further tests (static test or
dynamic tests) are allowed, and it will lead to
the fuse blowing.
The resistance between U and N (both
sides) should be greater than 200 Kohms.
ZERO
indicates a power device failure in
both cases, No further tests (static test or
dynamic tests) are allowed, and it will lead to
the fuse blowing.
