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Technical data (cont´d)
Flame supervision
Operating voltage (Terminal 23 or 24)
Minimum detector current required
Maximum possible detector current
Short-circuit current
Maximum length of detector cable (laid separately)
1)
AC voltage, measured with no detector current at AC 230 V mains voltage. Internal resistance of measuring instrument 10 M. The
shutter of the flame detector QRA53.../QRA55... is powered by mains voltage
2)
Detector cable laid in a minimum distance of 5 cm from other mains carrying cable:
As a multiple cable
-
With 5 single wires
-
With a shielded 3-core control cable to terminals 3, 4 and 5 of the flame detector QRA53.../QRA55... and
standard mains cable to terminals 1 and 2
With 2 shielded single-core coaxial cables (45 pF/m, e.g. RG 62) to terminals 3 and 4 of the flame detector
QRA53.../QRA55... and standard mains cable to terminals 1, 2 and 5
If possible, shielding should be earthed at both ends
3)
Longer cable distances are permitted when connecting low-capacitance detector cables to terminal 24 of the burner control
(especially against earthed wires!)
Detector current measurement
Measuring circuit for
detector current
measurement
LOK16.../RAR9...
LGK16.../QRA53.../
QRA55...
Building Technologies Division
The measuring device must be connected between the detector and terminal 22 (+pole
to terminal 22).
With RAR9...
DC 6...38 µA
+
22
A
RAR9...
+
24
7785v02/1008
Notice!
Use the KF8832 measuring device (not suited for continuous operation).
There is no self-checking while measurements are made.
The KF8832 is not required when using the QRA5x.D.../QRA5x.G...
With QRA5x.C.../QRA5x.E...
DC 35...50 µA
22
A
+
470 µF/25 V
LOK16...
RAR9...
QRA5x.C...
QRA5x.E...
<DC 1 V
AC 280 V ¹)
±10%
±10%
DC 6 µA
DC 35 µA
DC 38 µA
DC 50 µA
---
---
100 m
²)
+
7785v04/1008
LGK16...
QRA5x.D...
Ionization probe
QRA5x.G...
AC 280 V ¹)
AC 245 V ¹)
±10%
±10%
DC 120 µA
DC 12 µA
DC 270 µA
DC 100 µA
---
Approx. AC 300 µA
²)
60 m ³)
With QRA5x.D.../QRA5x.G...
DC 120...270 µA
+
A
22
7785v01/1008
+
470 µF/25 V
Max. 50 m
Max. 70 m
Max. 15 m
Max. 60 m
13/28
CC1N7785en
20.11.2017
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