Arc Detector

Waveguide Arc Detectors
Narda-MITEQ's series of Arc Detectors are opto-electric devices which detect visible arcs in high-power microwave waveguides. They are normally mounted between the output flange of the microwave source and the transmission line in a 90 degree E-plane bend configuration. Other configurations may be manufactured upon special request. Narda-MITEQ offers Arc Detectors in waveguide sizes ranging from WR28 - WR284. Please call us and discuss your needs with one of our design engineers. How Narda-MITEQ Waveguide Arc Detectors work electrically: In the base model of Narda-MITEQ's Arc Detector, +15 VDC at 25mA is applied to pin A to arm the device. When armed, the arc detector will develop TTL 1 (2.4 - 5.0 volts, 3.5 volts typical) on the output, Pin D. In response to a visible arc in the waveguide facing the detector device (input flange 1), Pin D will have an output of TTL 0 ( 0-0.8 volts ). Pin D will remain at this level until the arc in the waveguide is no longer present. The Arc will automatically re-arm when the waveguide is no longer illuminated. Pins E and F (case ground) are ground connections.
Waveguide Arc Detector	GENERAL SPECIFICATIONS (WAVEGUIDE ARC DETECTOR STANDARD OPTIONS)
	Input Power:	15+ VDC at 25mA
	Pressure Sealed to:	30 PSI
	Output Voltage	Armed: TTL 1 (2.4 - 5.0 volts, 3.5 volts typical)
	Output Voltage	Fault/Fired: TTL 0 (0 - 0.8 volts)
	Response Time:	less than 10 µsec.
Arc Detector Options: A - Input Voltage: Input voltage at Pin A is +28VDC at 40 mA, Output voltage TTL 1(2.4 - 5.0 volts, 3.5 volts typical) B - Latching Reset Capability (+5VDC): After being triggered by an arc, the output will remain at less than one volt until the Arc Detector is manually reset. This is accomplished by bringing Pin C to +5VDC (TTL) momentarily, then returned to case ground. BB - Latching Reset Capability (Open Circuit): After being triggered by an arc, the output will remain at less than one volt until the Arc Detector is manually reset. This is accomplished by removing pin C from case ground to an "open circuit" momentarily, then returned to case ground. C - Self test: To test the Arc Detector's triggering/latching ability, +5 VDC is applied to pin B. Current required is 20mA D - Output Voltage: Output voltage is +15 VDC. This option requires choosing option A, +28 VDC input, The fired voltage is less than 1 volt. Note: For any of the options shown above add the appropriate letter to the end of the model number. It is possible to add more than one option. Example P/N: 137-ARCE-A-2-2 becomes: 137-ARCE-A-2-2/AB when options A & B are desired.

Waveguide Arc Detector - Standard Models
WG Size	Freq. (GHz)	VSWR (max)	Insertion Loss (max)	Peak Power (max)	Model No.*	Outline Drawing
WR284	2.60 - 3.95	1.10	0.05	1 MW	284-ARCE-A-6-6	Dwg
WR229	3.30 - 4.90	1.10	0.05	900 KW	229-ARCE-A-2-2	Dwg
WR187	3.95 - 5.85	1.10	0.05	800 KW	187-ARCE-A-6-6	Dwg
WR159	4.90 - 7.05	1.10	0.05	700 KW	159-ARCE-A-2-2	Dwg
WR137	5.85 - 8.20	1.10	0.05	600 KW	137-ARCE-A-2-2	Dwg
WR112	7.05 - 10.0	1.10	0.05	500 KW	112-ARCE-A-6-6	Dwg
WR90	8.20 - 12.4	1.10	0.05	400 KW	90-ARCE-A-6-6	Dwg
WR75	10.0 - 15.0	1.10	0.05	325 KW	75-ARCE-A-6-6	Dwg
WR62	12.4 - 18.0	1.10	0.05	250 KW	62-ARCE-A-6-6	Dwg
WR51	15.0 - 22.0	1.10	0.05	200 KW	51-ARCE-A-6-6	Dwg
WR42	18.0 - 26.5	1.10	0.05	150 KW	42-ARCE-A-6-6	Dwg
WR34	22.0 - 33.0	1.10	0.05	100 KW	34-ARCE-A-6-6	Dwg
WR28	26.5 - 40.0	1.10	0.05	50 KW	28-ARCE-A-6-6	Dwg

Ordering Information Waveguide Arc Detector	WR	-Mod	-M	-F1	-F2	/OPT
Example part number:	137	-ARCE	-A	-2	-2	/AB
Waveguide Size: (WR) WR28 thru WR284 available
Basic Model No.: (-Mod) ARCE=E-Bend configuration ARCH=H-Bend configuration
Material (M): A=Aluminum, B=Copper/Brass
Flange 1 (-F1): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke
Flange 2 (-F2): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke See Narda-MITEQ Standard Flange page for more info.
Options (/OP) A, B, BB, C, D Available See Arc Detector Options table above. More than one option is permitted.

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered for your needs by using the Model # code system to the left.

** Bi-Directional Arc Detectors are also available. These can be supplied on 90º E or H bends or on straight section of waveguide. The same options as on the units listed are available.

Arc Detectors For Waveguide

Waveguide Arc Detectors