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Reactive power compensation units are used in companies to save costs and also to reduce the load of the network. This is the cause that there are special requirements for the control units of these compensation panels, the power factor control relays. The most important duty for the power factor control relay is the reliable regulation of reactive power. On the one hand this is reducing costs and on the other hand the current through cables and circuit breakers is also reduced. Another task is to supervise the function of the panel and to signal problems. These tasks are perfectly done by Electronicon power factor regulators with eitheir patented regulation principle. By continuous measuring of the capacitor power the relay is always able to use the step with the optimal size. The program for regulation is only defined by the choice of the used capacitor sizes. If capacitors, contactors or fuses are damaged, power factor regulators of the PFR-X series are detecting this and they give an alarm. If necessary this alarm
message can also be forwarded by the internal alarm relay.
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All relays PFR-X are fitted with the following features as
standard:
All the following options are available with 4, 6, 8 or 12 steps:
＊Auxiliary voltage separate from voltage measuring
＊Auxiliary voltage: 115/230V, 45 - 65Hz(differing voltages on request)
＊Voltage measuring: 1 x 50 - 530V
＊Current measuring: 1 x 10mA - 5A
＊Relay for alarm: 1 x C/O contact
"L" : fan control and 2nd target power factor
"M" : display of measurement values
"LT" : fan control and 2nd target power factor temperature dependent
The following option is only available with 6 or 12 steps:
"t : transistor outputs for thyristor switches for dynamic compensation
Technical data：
＊Auxiliary voltage: 100-132V / 207-253V, 45-65Hz, max. fuse 6A
＊Voltage measuring: 50- 530V, 45-65Hz, PT-ratio 1 - 350
＊Current measuring: 0-5A, sensitivity 10mA, burden 15mOhm, Overload 20% continuous, CT-ratio 1-4000
＊Regulation outputs: relay outputs: N/O, one common point, max.
＊fuse 6A breaking capacity 250V AC / 5A
＊Alarm contact: C/O, voltfree
＊Max. fuse 6A breaking capacity 250V AC / 3A
＊Fan control: N/O, voltfree
＊Max. fuse 6A breaking capacity 250V AC / 5A
＊Interface: TTL, rear side
＊Ambient temperature: operation: 0J.+70 , storage: -20 .+85J
＊Humidity: 0% -95%, without moisture condensation
＊Overvoltage class: II, pollution degree 3 (DIN VDE 0110, Teil 1 / IEC 60664-1)
Standards: DIN VDE 0110 Teil1(IEC 60664-1:1992)
VDE 0411 Teil1 (DIN EN 61010-1 / IEC 61010-1:2001)
VDE 0843 Teil 20 (DIN EN 61326 / IEC 61326: 1997 +
A1: 1998 +A2:2000)
＊Conformity and listing: CE, UL, cUL
＊Terminals: cage clamp, max. 2,5qmm
＊Casing: front: instrument casing plastic (UL94-VO), rear: metal
＊Protection class: front: IP50 (optional Ip54 and lockable), rear: IP20
＊Weight: ca. 0,8 kg
＊Dimensions: 144 x 144 x 58mm h x w x d, cutout :138 x 138 mm
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