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.
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In the case of other voltages or current transformers for which the primary or secondary current is not given, the response current can be calculated from the general equation: 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 frakko cos-phi alarm being switched-off; see mode The power factor is displayed.
By pressing the “Set” button again the display shows the actual power factor fraoo the alarm marker “Ampere” no longer flashes.
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Control relay does not switch off all stages during times of low load Control relay is in manual or facility shut-down. Check the current transformer. It must not be possible to touch the applied voltage at the alarm contact. However, we recommend that if capacitor stages are added at a later date, the set-up procedure be repeated see section 2. Relay does not respond to manual operation although it has voltage and digital display is operational.
If a voltage transformer is used within the measuring circle the voltage transformer ratio must be entered in order to scale the display of missing kvar to reach the target power factor correctly. Mode of connection incorrectly Reset mode of connection. The control relay consistently achieves this control band by switching on and off systematically. Product Description The reactive power control relay RM is a microprocessor-based control relay for intelligent control of capacitor banks with 6 control contacts.
As already described the control relay tries to reach its programmed control band. Nature of Business Manufacturer. The discharge time can be set between 5 and seconds. After the identification process the actual power factor appears on the display and the control relay begins to function. To prevent unintentional reprogramming, the set mode can only be activated within the first 5 minutes after the operating voltage has been applied.
Reactive current ind 3 If the control relay operates within the band range shown no switching operations will be activated. Current transformer is defective.
In such situations we recommend that the stage identification be switched off and the relevant values be programmed manually. A different current measuring meter e. For exampleif “1. Relay was not in manual mode.
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View from below 3 P Contents 1. The user only needs to change the target power factor or a few values to suit his special requirements. The alarm markers remain active after the alarm until they are acknowledged by pressing the “Set” button.
To the right of the four and a half character digital display there are three LEDs indicating which display mode is active, either “cos phi”, “Ampere”, or “Harmonic”. By pressing the “Set” button the amount of capacitive and reactive power missing to reach the target power factor flashes on the display. For voltages crako or equal to V, a control transformer for the supply of the controller must be used.
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Store this value by pressing the “Set” button. Stage display LED lights up but capacitor contactors are not activated End of delay time of approx. If measurements are not rk out via a summation transformer, the current change, measured by the control relay, is too low when switching on the capacitor stages, which can lead to errors during the automatic stage identification process.
Automatic Power Factor Panel. That means for example: Circuits October 29, Lab Fixed stages are stages which are not included in the normal control cycle frakoo are switched on immediately after the control relay is switched on and always remain switched on. This setting is the normal setting on delivery from the factory and represents the best possible control characteristic for most applications.
All measuring instruments in current path must be connected in series Finer adjustment of the capacitor stages is required. There is either no voltage or the wrong voltage has been applied to the control relay. The current transformer can be installed in any phase.
In case of a capacitive cos-phi outside the band range the alarm signal functions as well. The reactive power control relay RM is a microprocessor-based control relay for intelligent control of capacitor banks with 6 control contacts. When setting “OFF” the alarm is suppressed. Measure the current of each capacitor stage with a clamp-on current meter.
The contact closes when either fraok is no mains voltage applied to the control relay or when an alarm is signalled. Values between 1 and can mr entered eg. The discharge period, which ensures that the capacitors are fully discharged before they are switched on again, overrides the switching delay time see section 5. Summary of Instructions On delivery, the control relay is set to preprogrammed standard values.
Check the fuses and contacts of the capacitor contactors and perhaps current absorbtion. These can be used to install the control relay into switchgear cabinets of cubicles of protective class II.