Circutor EMK Series, Инструкция по эксплуатации, Страница: 13 / 20

EMK series
Instructions Manual M98118701-03-19A 13
6
STATIC CAPACITOR BANK START-UP
6.1 Before start-up
The static capacitor banks include a power factor regulator. In order to perform the proper start-up
adjustments, the basics of operation of such regulator must be known. For this reason, all
capacitor banks
come with the specific manual of the regulator used. Find this manual and
have it available for the start-up process . For the case of static capacitor banks, the regulator
should be a fast type as computer Max f , computer Smart f , computer PlusTF or equivalent,
having static output.
In order to carry out the proper adjustment of the regulator controlling a static
capacitor bank, the minimum load at the installation must be at least 30% to 40%
of the nominal load of such installation. If the load is much less than the rated load
and only a few steps need to be connected , you can manually force the
connection of all the steps , to check them all.
During low load periods, manually connecting the entire capacitor bank steps is not
recommended, since in some cases resonance with the installation's power
transformer could occur, thus causing strong over-currents.
6.2 Start-up
Safety
Apply the safety regulations listed in section 2 of this manual before operating the
equipment.
The standards, Electric Code Regulations and other applicable laws of the country
where the capacitor bank is installed or operated should be strictly followed.
• Ensure the inner circuit breaker protecting the regulator (fig. 4.3) is connected
• Connect the power supply to the panel and check that the regulator display illuminates
immediately. Otherwise, stop and check the previous paragraph.
• Check the regulator's cos ϕ indication. If the indication is out of the range 0.5 to 1, it may be
possible that the current transformer and / or the power supply to the regulator are improperly
connected. Most of the regulators use only one current transformer. In this case, connect as
per fig. 6-2 (place the current transformer on phase L1 and take the power supply voltage from
phases L2 and L3)
Fig. 6-1 .- Computer Max f regulator
(Picture provided as an example. It may not
coincide with the model used on your unit).
Fig. 6-2 .- Connection of a regulator with only one CT
(If using computer PLUS , 3 current transformers are used. See the
specific manual of the computer PLUS regulator)