Zum Lingeshof 3
36124 Eichenzell
Tel. +49 6659 98794-0
Fax. +49 6659 98794-44
E-Mail: info@walcher.com
Frequency relay
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The frequency relay of the processor controlled relais family from WALCHER combines the features of a measuring converter (0...10 V / 2...10 V), a digital indicating instrument as well as a controlling relay and a three-point controller on a 19" Europe-type circuit board. The switching values (relay outputs or optical couplers) are free programmable by digital switches and have an accuracy of 0,01 Hz. The resolution of the 4-digit LCD is also 0,01 Hz. The analog output, which is independant from the processor, has an accuracy of 0,5 %. To obtain a fine adjustment of the relay treshold for the overfrequency and underfrequeny adjustment, there is a total of three ten-stage code switches, P1, P2 and P4. At first, the resolution will be adjusted stepwise between 0,1 % and 5 % by using switch P4, which is located on the circuit board of the relay. After that and separated for over- and underfrequency, the respective tresholds can be predetermined with a desired multiplier by using the switches P1 and P2. The switching relays or optical couplers have a switching hysteresis of 80 % of the treshold, adjusted at P4. The measuring input is separated galvanic. At fu < f < fo (frequency is correct), both relays are energized (holding-current principle).
Please indicate the following data when ordering: Type: WA-FR 6 E/A (with display) or WA-FR 6 E (without display) Rated frequency, the equipment is adjusted to: 50, 60 or 400 Hz Analog output adjustment: 2...10 V or special performance Example: 1 piece WA-FR 6 E/A, 50 Hz, 2...10 V
Technical Data WA-FR6 E/A limiting and characteristic values <br>
Supply voltage DC (min/max) |
20 V/30 V |
Rotating switch |
Time step |
Scaling |
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Ripple (max) |
15% |
Multiplier |
Rotating |
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Measuring input voltage AC (min/max) |
150 V/250 V |
Rotating switch |
switch |
P4 |
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Rated frequency (optional) |
50/60 Hz |
P1/P2 |
P3 |
(on the panel) |
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Measuring input: |
frequency range (rated freq.=100 %) (min/max) |
2 %/200 % |
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Proof test voltage (meas. input/output) |
2500 V |
Relay contacts (over- / underfrequency) |
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change-over contacts |
1/1 |
Max. relay contact current (sw.-on / perm. / sw.-off) |
8/3/2 A |
Max. relay contact voltage (DC/AC) |
220/250 V |
Max relay switching power (W/VA) |
60/125 |
Optical coupler output current (DC) |
10 mA |
Optical coupler output voltage (DC at 10 mA) |
24 V |
Optical coupler output voltage (DC at 1 mA) |
70 V |
Analog output |
2...10 V |
Analog output (optional) |
0...10 V |
Galvanic separation analog output |
none |
Relay response- and release time |
5 msec. |
LCD display resolution at 50 Hz / 60 Hz |
0,01 Hz |
LCD display resolution at 400 Hz |
0,1 Hz ON |
OFF |
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Operating temperature range (min/max) |
0/+70 C |
Storage temperature range (min/max) |
-55/+85 C |
Temperature coefficient 0,005 % |
ON OFF |
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Setting: |
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Overfrequency = [Rated frequency*P1*P4] |
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Underfrequency = [Rated frequency*P2*P4] |
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Setting example: |
Switch position: |
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Rated frequency: 50 Hz Switch P4 on pos.5...Scaling 0,5 % |
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Overfrequency: |
51 Hz = +2 % |
Underfrequency: |
49,5 Hz = -1 % |
Overfrequency |
50 Hz*4*0,5 % = 1 Hz |
Underfrequency |
50 Hz*2*0,5 % = 0,5 Hz |
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Block diagram |
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Overfrequency |
Underfrequency |
P1 |
P2 |
multiplier |
multiplier |
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Ausgabemodul=> Output module |
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Über |
=> Over |
Unter |
=> Under |
grün |
=> green |
rot |
=> red |
gut |
=> good |
Alarm |
=> Alarm |
CPU-Modul |
=> CPU module |
Impuls-/ |
=> Impulse-/Current |
Stromwandler |
=> transformer |
Trennungsmodul |
=> Separation module |
Netzteil |
=> Power supply |
Nulldetektor |
=> Zero-crossing detector |
Meßeingang |
=> Measuring input |
Optokoppler-Ausg |
=> Optical coupler outputs |
LCD Anzeigetreiber |
=> LCD display driver |
LCD Anzeige |
=> LCD display |
