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Specialized - Ignitron ·IgnitronPowerSwitch

FG271

Water-cooled ignitron for welder-control and intermittent rectifier service. Its mercury-pool discharge handles extremely high current.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The FG-271 is a steel-jacketed water-cooled ignitron for resistance-welder-control and intermittent rectifier applications.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

IgnitronPowerSwitch

X-ray radiationInterelectrode capacitances
Rectifier peak inverse voltage
500 V
Rectifier nominal output current
40 A
Rectifier peak forward current
700 A
Rectifier forward voltage drop
12 V

Ignitron. Intermittent-rectifier service values promoted; welder-control values preserved as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

IgnitronPowerSwitch

Other

  • Welder Maximum Demand

    600 kVA

    WelderControl 250to600Vrms

  • Welder Maximum Average Anode Current

    56 A

    WelderControl

  • Rectifier Surge Anode Current

    8000 A

    IntermittentRectifier 0.15Second

Characteristic

  • Ignitor Required Positive Voltage

    200 V

    Ignition

  • Ignitor Required Current

    30 A

    Ignition