ICAR RPA Instrucciones De Uso página 40

P.02 - Smallest kvar step
Rated power in kvar of the smallest installed capacitor bank.
Example: For 10 kvar, set 10.00
P.03 - Rated capacitor voltage
Rated voltage (nameplate) of the capacitors.
Example: For 460V, set 0460
P.04 - Reconnection time
Minimum time needed for the capacitor to discharge and be ready to used again.
Example: For 60 seconds, set 0060
P.05 - Sensitivity
Power factor regulator RPA serie
The sensitivity is a coefficient, which consents to adjust the controller tripping speed. A
low sensitivity provides for faster adjustments but with a greater number of switchings.
With high sensitivity, the adjustment is slower but with fewer switchings.
The sensitivity value corresponds to the time in which the controller is delayed before
taking action to a reactive power demand equivalent to the smallest step. For higher
power demands, the time will be quicker according to the criteria of inverse proportion.
Example: For 60 s/step, set 060
In this case with the smallest bank of 10kvar (P.02 = 10.0) and a system demanding
20kvar to achieve the set cospφ (∆kvar =20), the controller will attend 60/2 = 30seconds
before beginning the capacitor connection procedure (indicated by the flashing AUTO
LED).
Power factor regulator RPE serie
The parameter P.05 Sensitivity is used to set the number of subsequent averages, 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 pro-
portionally smoother.
P.06 LED 1...n Step coefficients
The coefficients of the steps represent the power of each step in relation to the smallest
capacitor bank, which value is programmed at P.02. If a step has the same power rating
of the smallest step, then its coefficient will be 1, while if it is double it will be 2 and so on
up to a maximum of 16. By setting 0, the step will be disabled and will never be conside-
red or used by the controller.
The last two steps can be programmed to operate as normal steps or as alarm relay or
again as fan control.
If the second last step is linked to a function then the last step cannot be used as a nor-
mal step. To select these functions, press - until the following codes are viewed:
noA = Normally open alarm (contact open in absence of alarm)
ncA = Normally closed alarm (contact closed in absence of alarm)
FAn = Fan control
N.B. For the alarms, see table on page 48. For fan control, refer to pages 37 and 41.
Example: With a RPA 8BMA installed in a control panel with 6 capacitor banks, respec-
tively 5,10, 20, 20, 20, 20 kvar at rated 460V and needing to use the last step as alarm,
the parameters must be programmed as follows:
P.02 = 05.00 (Smallest step = 5kvar)
P.03 = 0460 (Rated voltage 460V)
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