You can view the PDF files conveniently online with your browser – just click the link. Alternatively, you can save the information so that you can refer to it offline. Find out all of the information about the FRAKO product: power factor control relay / panel-mount / programmable / digital RM Contact a supplier or the. (see Table 1, pages 15 to 17) The Reactive Power Control Relay RM is Relay RM Sales Programme Power capacitors for low voltage FRAKO.
|Published (Last):||18 March 2007|
|PDF File Size:||3.25 Mb|
|ePub File Size:||13.49 Mb|
|Price:||Free* [*Free Regsitration Required]|
The Control Relay RM allows a variety of possible settings to meet the conditions on site. When voltage is initially applied to the control relay, fgako determines the location of the current and voltage sources automatic phase rotationi.
The display shows the active current on the fundamental oscillation in the current transformer CT circuit. The “kink” in the band characteristic line is not reflected in the feedback operation but is extended at the point of intersection of the reactive power centre line axis with the feed-back operation line.
The connection of the frao voltage must be fused externally with max 4A.
By setting “all” all counts are reset. When individual leaving this menu point the counter switching of the corresponding capacitor counters stage will be set to 0. Faults 8 9 10 11 Despite inductive load no stages are switched on when relay is in automatic mode.
It has to be passed by both capacitor and consumer current. To reach the set rn again, the control 6906 must be disconnected from its source for a short period of time. View from below 3 P Contents 1. Relay was not in manual mode. Frwko effective supervision of the reactive power control system capacitor bank is secured by the power factor display.
The alarm markers remain active after the alarm until they are acknowledged by pressing the “Set” button. ON” appears on the display until the control relay has switched on the first stage after approx. If this, however, is not possible due to lack of capacitor stages available, an alarm is signalised after several minutes depending on the size of the difference.
If the threshold values set for “switch-on” and “switch-off” are exceeded and no further change can take place in the output stages, the alarm signal functions except for the cos-phi alarm being switched-off; see mode Frajo button “Set” must be pressed repeatedly until the “Harmonic” alarm no longer flashes.
In the case 96606 fixed stages being used, the smallest stage has to be connected following the fra,o fixed stage. If the current transformer ratio CT is programmed via the set mode, the actual reactive current on the primary side of the CT is displayed.
That means for example: The power factor is displayed. However, if the control relay operates outside the band range, the RM will try to come within the band range with the minimum of switchings.
Faults 1 2 3 4 5 6 7 Possible Causes Necessary Action Control relay does not fraki, digital display remains blank. After acknowledgement the flashing alarm marker goes out. The effects are illustrated by the two examples in Figure 6 and Figure 7. All other stages follow according to their capacity.
Documents Flashcards Grammar checker. This takes place in set mode and at the same time it is necessary to programme the connection and rk parameters manually see section 5. In order to permit the widest possible use of the control relay, multiple settings are available.
Programmable overcurrent alarm threshold limit from1. When setting “OFF” the alarm is suppressed.
The LED “alarm” lights up for as long as a state of alarm exists. If the 6th stage was already switched on “6. The power factor display is independent of the control relay operation and can be reprogrammed at any time. Current transformer is in the wrong place. If no voltage transformer is present, the value “1” must be entered.
During the identification process all the control contacts of the relay are individually switched on and off again. In this way it can also be determined which switching outputs are in use. When a capacitor stage is switched on or off the control relay waits for the switching time delay before the switching process fraki place. Otherwise the current portion is displayed and has to be multiplied by the CT ratio to ftako the actual value.
The automatic identification mode or the automatic identification of connected capacitor stages mode are switched to “ON”. The power factor cos phi display value is the result of a mathematical calculation, which ensures accuracy over the entire range down to values close to 0. It will shift to the inductive direction if the plus sign is used and to the capacitive direction if the minus sign is used.
How to put out the alarm is explained frwko section 5. Check if capacitors are energized after switching.
By shifting the band into the capacitive range see Figure 7 in section 5. In case of low voltage networks being fed by several transformers switched in parallel, the capacitor current is distributed to all the transformers. As already described the control relay tries to reach its programmed control band.