Flame Supervision With Blue-Flame Detector - Siemens LGB21.130A17 Datasheet

Flame supervision with
blue-flame detector
QRC1...
Flame supervision with
UV detector QRA... and
AGQ... for LGB21... /
LGB22... / LGB41...
Building Technologies
HVAC Products
Perm. detector current during the prepurge
time (dark current)
Detector current required during
operation
Possible detector current in operation
Measuring circuit with the QRC1...
M
LGB3...
- +
12
1
sw
QRC1
br
bl
The QRC1... has been designed specifically for blue-burning flames. Incidence of light
is from the front and laterally. The flame detector is secured by means of a soft plastic
plug. 3-core connection (preamplifier integrated in the detector casing). For the different
types of flame detectors, engineering notes and technical data, refer to Data Sheet
N7716.
Mains voltage
Mains frequency
Power consumption
Degree of protection
Perm. ambient temperature
In operation
-
During transport and storage
-
Perm. length of cable from QRA... to
AGQ1...A27 (use separate cable)
Mounting position
Perm. length of connecting cable from
AGQ1...A27 to LGB...
Weight of AGQ1...A27
Detector voltage at QRA... (with no load)
Up to the end of «t10» and after controlled shutdown
From the beginning of «t1»
Detector voltage
Load by DC measuring instrument Ri > 10 MΩ
Up to the end of «t10» and after controlled shutdown
From the beginning of «t1»
DC detector signals with UV detector QRA...
Measurement on the QRA...
max. 5 µA
min. 50 µA
max. 80 µA
Legend
Microammeter Ri max. 5000 Ω
2
M
sw Black wire
br Brown wire
bl Blue wire
AC 220 V –15 %...AC 240 V +10 %
50...60 Hz ±6 %
4.5 VA
IP 40
-20...+60 °C
-40...+70 °C
max. 20 m
optional
max. 20 m
approx. 140 g
At mains voltage U :
N
AC 220 V AC 240 V
DC 400 V DC 400 V
DC 300 V DC 300 V
DC 380 V DC 380 V
DC 280 V DC 280 V
Min. required Max. possible
200 µA 500 µA
9/22
CC1N7435en
11.01.2007