Icar 8BMA Notice D'utilisation page 65

2. PARTICULARITY OF RPE POWER FACTOR CONTROLLER
2.1 INTRODUCTION
The RPE regulator is a special version of the RPA power factor controller especially
designed for real-time static power factor compensation. It is equipped with a total of 12
outputs, 11 static outputs with SSR (solid state relay) and one, the last, with a standard
electromechanical relay with changeover contact. A dedicated software allows to react
very fast to load variations, modifying the output configuration to compensate the reactive
power in the shortest time possible. All the measurements (voltage, current, power etc)
are sampled and recalculated in a time of about 20ms. The reaction time of the controller
after a load variation can vary from 40 to 60ms. See technical characteristics for a more
detailed description. It is also possible to configure the device to control a "mixed"
configuration, that is with some static steps together with some electromechanic steps in
the same panel.
2.2 DIFFERENCES FROM STANDARD RPA
The measures available on the device are identical to the standard RPA, and so are most
of the operative modes and procedures accessible from the front keyboard. The main
differences compared to the standard device are listed in the following points:
The 12th and last output, equipped with a electromechanic relay, can be programmed
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only as Normally open alarm, Normally closed alarm or cooling fan.
The parameter P.05 Sensitivity is used to set the number of subsequent averages,
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from 1 to 8, that are carried out on the needed reactive power value. Setting this
parameter to 1, the device will react immediately, while setting to values from 2 to 8
the regulation is proportionally smoother.
A new menu has been inserted, called Static setup menu, thet is added to the already
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existing Base, Advanced and Function menus. See the following pages for access
instructions and parameter list.
The reconnection time is not used for the static outputs steps.
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The switching counters of the static steps are not retenitive, that is they are reset to 0
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every time the device is switched off.
The Automatic setup procedure is not available.
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The parameter P.14 Step trimming is not available and remains set to OFF.
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The parameter P.18 Disconnection sensitivity is not available and remains set to OFF.
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2.3 MIXED CONFIGURATION
The RPE device can be configured to drive a panel with some static steps and some
electromechanic steps. In this case the static steps must be opportunely sized, in order to
be able to "cover" the rapid load variations, while the standard electromechanic steps are
used to compensate the reactive power need that is almost constant.
To control traditional contactors, the SSR outputs must be interfaced with external relays,
as indicated in the example wiring diagrams in the following pages.
When using a mixed configuration like this, some rules must be followed:
The electromechanic steps must be all of the same power.
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