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15. The BLR-CA does not require any adjustment of the responsiveness. Regulation does not follow a fixed switching program, different
capacitor sizes can be used for the respective steps. The relay measures the output for each capacitor step in the form of "units of value"
(inquiry in position 8). This measurement is made during the normal switching function according to reactive load requirement. These "units
of value" are stored in the relay memory and the appropriate unit is called up in order to meet the changing reactive load demand. As the
current transformer transmission is unknown, the measured units of value are only proportional to the capacitor output. If capacitors of the
same size are used, an even distribution of the switchings is paid attention to.
16. A flashing display segment indicates that the relay is searching for a suitable capacitor size (ind. or cap.) in order to meet the required
target power factor. if no suitable size is available, then no switching will take place, and the segment will continue to flash until the target
p.f. is obtained.
17. It is often necessary to commission an installation when there is no other load on the system. In this case, put the function switch (3) to
position 4. Capacitors can be switched with the aid of the +/- buttons. Please take into account that, during this time, there is not measured
the output for each capacitor step in form of "units of value" (see item 15).
When manual operation is not required any more, set the function switch back to position 3 (Automatic).
18. With the function switch in position 9 two storage types of alarm indication can be selected: the visual display is standard, external
output (m) is carried out optionally by means of contacts at zero potential (see diagram).
a) With "A__0" in the display, the alarm indication can only be cancelled or reset by moving DIP switch (2) briefly into the off position
(down).
b) With "A__1" in the display the alarm indication will be automatically cancelled once the correct target power factor has been obtained
again.
c) If the target power factor is not obtained, on account of insufficient or defective capacitors, after a time delay of 75 times step switching
time, the symbol "AL__" will appear at 5 sec. intervals in the display.
d) If the capacitors are being subjected to a distorted waveform which is producing dangerous harmonic overcurrents, then this will be shown
as an alarm in the display: "HA__" will flash at 5 second intervals.
e) If both alarms are signalling together, then the symbols "AH__" will flash in the display.
f) If external fault signalling contacts for power factor (m) are fitted the alarm contact is given between terminals M-MR (AL or AH).
g)
At CA-regulators with external alarm-contact, option "z" or "L", contact via terminal M - MZ will close
( display indicates either HA or AH ).
19; Option L; control of ventilator: (Please note: At this option no harmonic alarm device is possible! See item18/d ).
Ventilation control will be activated, if DIP switch S2 (behind removable name plate on front facia) is in ON position. Preseting automatic
alarm reset in position 1, selectable at multifunction switch in position HEX 9). DIP-switches S3+S4 enable to select 4 temperature
threshold levels (see code-switches). If temperature increases the selected threshold level longer than 24s within a "time-window" of 8
minutes, contact via terminal M-MZ (230VAC/5A) closes for further 8 minutes at least. "AH__" (Alarm-Heat will be displayed).
Contact opens again automatically, if within next „time-window" of 8 minutes the temperature will not exceed the selected level once more,
means plant had been cooled down. Any further exceeding of temperature will retrigger ventilation control automatically .
20; Exit port (7), TTL interface, enable data transfer to a PC by means of cable number 6. By means of software "BSTO"it is possible to
record and analyze data, such as power factor cosϕ, switchings, date and time of each switching step,connected and disconnected steps and
any trigerred alarm function. By means of the data storage DS21/22 or 23 it is possible to store data over a substantial period of time.
Once the required settings or alterations have been made, set the function switch to position 3 "Automatic" and replace
the front cover plate, so as to inhibit unauthorized interference with
DIP Switch ( S1 )
Current path: x/1A or x/5A
switch position OFF = x/1A
ON = x/5A
If requested data are not indicated on order, the relay will be shipped
with DIP Switch in position "ON" (x/5A) !
DIP Switch ( S2 )
Alarm status messages (refer to point 18)
switch position OFF = alarm status messages off and/or alarm reset
ON = alarm status messages on
DIP_Switches (S3 +S4 ) ( present at option– L , only )
Preset of temperature levels for ventilation control – see item 19
S3 – off / S4 off = 35° // S3 – on / S4 off = 40° // S3 – off / S4 on = 45° // S3 – on / S4 on = 50° C trigger levels
check before
commissioning
( Option –L- = Ventilation-Control OFF)
( Option –L- = Ventilation-Control ON )
relay settings.
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