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SERIES 20M
Modular Plug-In Instrument and Control Switches
Features
Series 20 Modular Plug-In Instrument & Control Switches have all
the outstanding features of the Series 20 and 20P Switches with the
following additions:
Modular Design Lighted or Nonlighted
Plug-in Quick Disconnect Capabilities
Front of Panel Serviceable Without Service Loops
Integral Indicating and Annunciator Lights With or Without
Dropping Resistors
Integrated Markings for Better Control Engravings for Title, Lamps
and Identification Tagging
Choice of Handles
Can be Mounted with Switch Handle and Nameplate in Place
Maintenance and Circuit Testing Accomplished from Front of Panel
Burndy Bantamate Military Style Connectors
3 Lamp Styles Round Dome, Round-Flat, Dome LEDs
Electrical Specifications
Continuous Ratings
20A/240 Volts
Interrupt Ratings
20A/120VAC
20A/240VAC
20A/24VDC
Momentary Current: 407 Amperes 1 Second
Overload Current (50 operations): 91A/240VAC
Dielectric Strength: 1500V rms
Insulation Resistance: 100 Megohms
Contact Resistance: 10 Milliohms
Mechanical Specifications
Sections/Poles
1 to 12 /1 to 24
Positions
2 to 12
Contacts
Double Break Silver Plated Copper
Action
45°, 30°, 60° and 90° Positive Detent or Spring Return
Mounting
Modular
Panel Thickness
2.5" Max. Standard
Construction
Contacts Enclosed in Rigid Thermoset Plastic Housing
Special Drives
Key Operated
Plug-in Connectors
Burndy Bantamate Trim Trio round connectors are standard. Generally only one connector is
needed and the N polarization is used. If two connectors are needed, the 2nd connector uses
the W polarization.
Note: The Series 20M Class 1E utility products comply with the following Nuclear Standards:
ANSI/IEEE C37.90, ANSI/IEEE C37.90.01, ANSI/IEEE C37.98, ANSI/IEEE C37.105, ANSI/IEEE 323,
ANSI/IEEE 344, ANSI/ASME NQA -1.