Reference Manual
BLR-CM/BLR-CM3phase
Rev. 08
2018-09
6
1.3 Voltage measuring
Terminals Um1 and Um2 are used for voltage measuring. Effective range is 50V to 530V AC and 45Hz to 65Hz. Voltage
measuring is necessary for calculation of control deviation and capacitors sizes for reactive power regulation as well as
for monitoring and protecting capacitors against over- and undervoltage and THD U and for showing different measur-
ing values.
If voltage is out of tolerance (range can be set), all active steps are disconnected and the regulation stops.
Voltage has to be measured as standard either from L1-N or L2-L3. If measuring voltage is taken from L1-N or from L2-
L3, is detected automatically by comparing the value of measuring voltage with the setting of nominal voltage.
It’s also possible to measure voltage from other phases as above. In this case either automatic initialization must run
(2.4.5) or the correct setting for phase-compensation (2.5.3.6) has to be done. Details of the functions can be found in
the referring chapters.
1.4 Control outputs
BLR-CM is available with up to 12 outputs. Depending on the regulator type the outputs can be relay outputs, transistor
outputs or a mix between both types. The indication of the type can be found on the rear sticker either with the type
description or the symbols of the output clamps.
If you have got the regulator type with mixed output steps, please pay attention that the clamp A1 is the
common root for the relay outputs 1 - 6 and clamp A2 is the common root for the transistor outputs 7 - 12!
1.4.1 Relay outputs
The relay outputs of the power factor controller are designed for the direct connection to contactors. The relay outputs
are potential-free with one common root.
Maximum breaking capacity for ohmic load: 250V AC / 5A, 400V AC / 2A, 110V DC / 0,4A, 30V DC / 5A.
Maximum fuse rating: 6A.
1.4.2 Transistor outputs
The transistor outputs of the power factor controller are designed for the direct connection to thyristor switches. These
open-collector outputs have got one common root. To trigger a thyristor switch connect (–) to the root and (+) directly
to the thyristor switch.
Maximum breaking capacity: 8-48V DC / 100mA
!
