Circutor computer MAX 12, Инструкция по эксплуатации

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8
computer MAX
Instruction Manual
2.2.- STARTING SCREEN
When the computer MAX is started (just after supply connection) the
screen shows a code indicating the device version. It’s important to
indicate this code in case of reporting any device fault or error.
2.3.- DEFINITIONS
In this section we shall give several definitions which will be useful to understand several sec -
tions of this manual.
2�3�1�- FOUR QUADRANT REGULATORS
This term is used to describe the regulators which are able to perform measure and control,
either if the active power flows from the utility to the customer network (the common case of a
consuming facility) or if it flows in the reverse sense. The later is the case of facilities containing
power generation equipment which export some amount of generated power to the utility.
2�3�2�- FCP PROGRAM (FAST COMPUTERIZED PROGRAM)
The devices having FCP program, control the switching of capacitor stages in order to minimize
the number of switching operations to reach the required PF compensation. Moreover, the
program assigns the capacitor stages to be connected or disconnected using a FIFO criterion
(FIFO= First IN, first OUT), that way the times of use of all stages are equalized.
2�3�3�- STAGES AND STEPS
We must distinguish between these two terms.
In this manual we call stage to each of the capacitor groups that constitute the PF correction
device. The capacitor stages in PF correction equipment may have all the same power or not,
as explained in the following paragraphs.
The term step is used to describe the minimum fraction of reactive power in which the PF cor-
rection equipment is divided. Usually this is the power of the lower stage.
2�3�4�- STAGES RATIO PROGRAM
Powers of successive capacitor stages in PF correction equipment generally follow certain
patterns called stages ratio program or simply “ Program ”. The stages program indicates the
relationship between the different capacitor stage powers. Most common stages ratio programs
are the as follows:
Program 1:1:1 �
All capacitor stages have the same rated power (kvar). For instance, a 5-stage
device of 100 kvar would be formed by 5 equal stages of 20 kvar and would be described as a
device of (5 x 20) kvar.
Program 1:2:2 . All capacitor stages from the second and up have a rated power (kvar) which is
twice the rated power of first stage. For instance, a 5-stage device of 180 kvar would be formed
by a first stage of 20 kvar and 4 equal stages of 40 kvar, and would be described as a device
of (20 + 4 x 40) kvar.