Asco 1251794, User Manual, Page: 74 / 96

12
IHT Technical Reference
Checking the rating values
The voltage, frequency and number of phases set are the Sigma
controller's best estimate of the supply rating, based on the
measurements it makes. However, if the generator is uncalibrated, non-
standard, or is underperforming in some way, then these values may
need adjustment before testing can begin.
It is very important to check if the automatically set values are
acceptable, and you can usually do this by comparing them to those on
the generator’s rating plate.
Figure 1-10 Typical generator rating plate.
Note: In this example
the generator is rated at
400V, 50Hz with an
apparent power of
1100kVA at 0.8 cos
Φ
.
The voltage, frequency, number of phases, apparent power (kVA) and
power factor (cos
Φ
) values shown on the Supply on Test page are all
adjustable from the Supply on Test Edit page. You can reach this page
directly by pressing F3 (EDIT) or (after automatically measuring the
supply on the busbars) by pressing F2 (NEW).