NL-5550 IGNITRON TUBE 22.4 Amperes NL-5550 mercury pool tube desi
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IGNITRON TUBE
NL-5550 IGNITRON TUBE 22.4 Amperes
NL-5550 mercury pool tube designed especially resistance welding control. rating approximately equivalent 150-ampere magnetic contactor.
NL-5550 used control 25-60 cycle voltages volts. also used control stored electrostatic energy resistance welding.
NATIONAL ELECTRONICS, Inc.
GENEVA, ILLINOIS,
NL-5550 IGNITRON TUBE TECHNICAL INFORMATION
CONTROL APPLICATIONS ratings based full-cycle conduction phase delay) regardless whether phase control used, frequencies from cycles, voltage between volts rms.
iMaximum averaging time seconds
Maximum clamp temperature,
demand .150
iCorresponding maximum average anode
current tube amps 12.1
^Maximum average anode current tube
amps 22.4
iCorresponding maximum demand
volts rms. 11.6
volts rms. 27.8
Maximum surge current
Peak amps .280
percent max. demand current
2CAPACITOR DISCHARGE RATINGS
Maximum discharges sec.
Peak forward voltage, max.
Peak inverse volts, max.
Peak anode current, max. amps.
.3000 .3000
6000 3000
Maximum temp, cooling clamp, Corresponding maximum average
current, amps
Maximum averaging time, sec. 0.66 1.25
IGNITION REQUIREMENTS (same both applications)
Ignitor Voltage
Maximum instantaneous allowed, ignitor anode voltage
Maximum instantaneous required, ignitor positive volts
Maximum instantaneous allowed, ignitor
Ignitor Current
Maximum instantaneous allowed amperes
^Maximum instantaneous required amperes
Maximum average allowed ampere
signitor ignition time maximum microseconds
Ignitor current averaging time seconds
GENERAL CHARACTERISTICS
Number anodes
Number ignitors
Mounting position Vertical
Peak drop approximate volts
Type cooling Water cooled clamp
Minimum inlet water temperature
weight lbs.
Approx. shipping weight lbs.
lUsing log-log paper, straight line interpolation Demand Current Average Anode Current used determine intermediate ratings.
2Using log-log paper, straight line interpolation between listed points used determine intermediate ratings average anode current maximum averaging time temperature.
'Ignition will occur either maximum required instantaneous positive potential applied maximum required instantaneus current flows rated maximum ignitor ignition time.
IOOO
OUTLINE DRAWING
DEMAND CURRENT PERCENT DUTY
80IOO PERCENT DUTY TUBES CONNECTED INVERSE MRALLEL
TGNITQR terminal .250 .010
MAX-REFERENCE LINE-
CLAMP AREA
/2.l3tft)IA.+.Oltf' DIA.
MAX.
ANODE TERMINAL^
7MAX.-4
MAX.
mrnwv
HOLE
MAX.
Printed 5-56
NATIONAL ELECTRONICS, Inc.
GENEVA, ILLINOIS,
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