DESCRIPTION RATING ETI-1 PAGE 4-45 '-"KS, SPECIAL
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FG-259-B
DESCRIPTION RATING
ETI-1 PAGE
4-45
'-"KS,
SPECIAL DESIGN FEATURES
Stainless-steel, seam-welded construction
Uniform water cooling
Strong, compact design
Easy install
IGNITRON
Copper terminals Flexible anode lead
Mercury-pool cathode allows extremely high instantaneous currents passed through tube without damage.
DESCRIPTION
This steel-jacketed designed, FG-238-B, rectifier service 125-, 250-, 600-, 900-volt power fields. FG-259-B used rectifiers rated kilowatts depending number ignitrons used, output voltage, circuit.
FG-259-B also rated 2400-volt resistance-welder-control service capacity 1200 kilovolt -amperes this service.
259-B continuous average current rating amperes tube rectifiers rated kilowatts.
losses low. Phase control ignitron impulses permits voltage control rectified output. Excitation small auxiliary anode stabilizes cathode spot very small anode currents. ignitors, only which used time, assure long life.
GENERAL ELECTRIC
TUBE
ETI-1
PAGE
4-45
TECHNICAL INFORMATION
These data reference only. design information refer specifications.
GENERAL CHARACTERISTICS
Electrical
Voltage drop
amperes instantaneous anode current.12.6 volts
amperes instantaneous anode current.14.4 volts
amperes instantaneous anode current.17.3 volts
Mechanical
Cathode. pool type
Number ignitors.2
Number main anodes.1
Number auxiliary anodes.1
Type cooling. water
Typical flow.1.5 gallons
minute
Pressure drop above flow.2 pounds
square inch
Temperature rise with lower rate flow
amperes anode.6 centigrade
weight, approx.13.5 pounds
Shipping weight, approx.22 pounds
MAXIMUM RATINGS
Rectifier Power Supply-Frequency Cycles, Phase Retard
Maximum inverse forward anode voltage.900 volts 2100 volts
Maximum anode current
Instantaneous.900 amperes amperes
Average continuous current.100 amperes amperes
2-hour-average current over 2-minute period.150 amperes 112.5 amperes
1-minute-average current over 1-minute period.200 amperes amperes
Surge current, maximum duration 0.15 second.6000 amperes 4500 amperes
Maximum outlet water temperature.60 centigrade centigrade
Minimum inlet water temperature.6 centigrade centigrade
Minimum water flow
continuous average anode current.1.5 gallons gallons
minute minute
load*.0.5 gallon gallon
minute minute
*For systems which flow water controlled load.
Welder-Control 2400 Volts Rms, Frequency Cycles
Maximum demand. 1200
Corresponding average anode current.75 amperes
Maximum average anode current.113 amperes
Corresponding demand.600
Maximum time averaging anode current 2400 volts, rms.1.50 seconds
Minimum water flow.1.5 gallons
minute
Maximum outlet water temperature.30 centigrade
Maximum surge current.3000 amperes
Maximum duration surge current.0.15 second
Ignition Requirements (Ratings same both Welder Rectifier Service)
Ignitor voltage
Maximum instantaneous allowed, ignitor anode voltage
Maximum instantaneous allowed, ignitor negative.5 volts
Ignitor current
Maximum instantaneous allowed.100 amperes
Maximum average allowed.2.0 amperes
Time averaging current.10 seconds
Maximum ignition time.100 microseconds
ETI-1
PAGE
4-45
TECHNICAL INFORMATION (CONT'D)
Anode firing (See elementary circuit K-9033528)
Maximum instantaneous ignitor potential required.150 volts
Maximum instantaneous ignitor current required.40 amperes
Typical resistance added ignitor circuit anode firing
anode voltage volts less.4 ohms
anode voltage volts 1000 volts.10 ohms
anode voltage 1001 volts 1500 volts.20 ohms
anode voltage 1501 volts 2000 volts.35 ohms
anode voltage 2001 volts 2400 volts.50 ohms
Separate excitation (See elementary circuit K-9033525)
Minimum volt-ampere requirements separate excitation Firing systems shown K-9033529
Auxiliary Anode Requirements (Ratings same both Welder Rectifier Service)
Maximum average current.5 amperes
Maximum inverse voltage
With main anode conducting.25 volts
With main anode conducting.150 volts
FG-259-B
MINIMUM VOLT-AMPERE REQUIREMENTS SEPARATE-EXCITATION FIRING SYSTEMS
FG-259-B
ELEMENTARY CIRCUIT CAPACITOR FIRING
FIG.
K-9033525
11-15-44
FG-259-B
ELEMENTARY CIRCUIT ANODE FIRING
IGNITRON
FIG.
K-9033528 12-16-44
IGNITOR CURRENT AMPERES K-9033529 FIG.
11-15-44
ETI-1
PAGE
4-45
CURRENT PEAK AMPERES
TUBE
FG-259-B DROP, OUTLET WATER WATER FIG.
7-1-44
'i^t
FG-259-B
1000
60708090
DUTY-PERCENTAGE TUBES CONNECTED INVERSE PARALLEL
FG-259-B IGNITRON; DEMAND CURRENT PERCENTAGE DUTY 2400 VOLTS RMS, OUTLET WATER TEMP K-8074661 WATER RATE GAL/MIN, WELDER CONTROL SERVICE 9-26-44
FIG.
ETI-1
PAGE
4-45
DIA.
ANODE CONNECTION
MAX.
FROM ^VERTICAL
AUXILIARY fl-ANODE CONN.
CATHODE CONNECTION
OUTLINE FG-259-B IGNITRON
K-5344767
8-10-44
Electronics Department
GENERAL ELECTRIC
Schenectady,
4-45 (4M) Filing 8850
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