10250TM24 EATON CUTLER HAMMER, 10250TM24 Datasheet - Page 244

• Manufacturer Part Number: 10250TM24
• Description: Legend Plate
• Manufacturer: EATON CUTLER HAMMER

Specifications of 10250TM24

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• For Use With: 10250T Series Pushbutton Operators / Indicating Lights
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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47
Summary of Basic Methods Available for Class I, Division 2 Locations
Figure 47-155. Factory Sealed Contact Blocks
Figure 47-157. Explosion Proof Enclosure
Method
Factory Sealed Contact Block
Hermetically Sealed Block
Explosion Proof Enclosures
(Class I, Division 1 and 2)
Pushbuttons & Indicating Lights
Ratings
Class I Division 2
Escaping
Cooled
Gas
Internal
Ignition
Threaded Joint
Features
Configuration
Closed-ended labyrinth contact
block with an incendive circuit
incapable of external ignition
Reed switch sealed against an
external atmosphere
Enclosures capable of with-
standing an internal explosion
while preventing external igni-
tion. Enclosures designed for
Class I, Div. 1 can safely be used
in Class I, Div. 2
Direct Drive Contacts
•
Contacts can be
mechanically forced
apart if subject to an
arch/fault current.
Internal
Ignition
Escaping
For more information visit: www.eaton.com
Cooled
Gas
Advantages
• Higher continuous carrying amperages —
• Direct drive contacts — contacts can be
• Suitable for use in all enclosures
• Best suited for motor control applications
• Suitable for low energy level circuits
• Suitable for use in all enclosures
• Higher level of protection than required
up to 10A
forced open
for Class I Division 2
Figure 47-156. Hermetically Sealed Reed Contact Block
Internal
Ignition
Flat Joint
Depression of plunger
rotates magnet and either
opens/closes contacts.
Contacts can not be
forced apart if subject to
arch/fault current, because no
mechanical connection exists.
Disadvantages
• May not be suitable for logic level
• Lower continuous carrying amperages
• Contacts cannot be forced open
• Permanent magnet attracts metallic dust
• Higher material and installation costs
• Conduit sealing is still required
• Time consuming maintenance
circuits
are not suitable for motor control applica-
tions (typically 3A to 5A rated)
and filings that can reduce the electrical
creepage distance between live terminals
Hermetically sealed
reed does not allow
external atmosphere to
enter switching chamber.
Escaping
Cooled
Gas
CA08102001E
March 2008