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F;T*N
High Capacity Toggle Switch — 7818K1
arcing, and of welding the
Contact Material:
switch contact. EATON has
10% silver cadmium
addressed this problem with
oxide composite.
its high inrush switch.
By combining innovative
Terminal Type:
design and quality materials,
Screw Terminals — Brass
this switch is designed to
(Cat. No. 11-6074-4) supplied.
carry the specified maximum
Furnished unassembled.
inrush current for
Mounting Means:
10 milliseconds for a minimum
of 20,000 On/Off cycles.
Molded flush mounting
bracket, high impact
SPECIFICATIONS
polycarbonate, 84.12mm
Ratings:
(3.312"), center-to-center
spacing and 60.33mm
40A, 600V ac.
(2.375") spacing for
5 Hp, 250V ac.
self-tapping screws.
Circuits:
Lever:
2PST — maintained.
Nylon.
Contact Mechanism:
Base:
Quick-make/Quick break snap
Molded thermoset material.
acting butt contact.
Dielectric Withstand:
Make: 200A peak inrush at
2200V RMS minimum.
125V ac for 10 ms for 20,000
cycles minimum.
Approvals:
Break: 20A at 125V ac for
UL to Standard 508,
20,000 cycles minimum.
File E147754.
DESCRIPTION
The heavy duty, high capacity switch (Cat. No. 7818K1) is ideal for exceptionally high power applications, heavy duty motor loads and for use in welding equipment or similar industrial applications.
HIGH CAPACITY OVERVIEW
Capacitive loads will result in a current inrush far exceeding normal operating current. In fact, the typical capacitive load inrush current, shown in Figure 2, is potentially more damaging to a switch than a typical inductive load inrush. The major difference is that the capacitive load can reach maximum inrush sooner. Generally, peak inductive load current inrush (figure 1) occurs after any switch contact bounce has subsided. In a capacitive load, however, switch contact bounce could occur at the same time as maximum current inrush, increasing the possibility of
8337K2 I Outlet Box Mounting
' 7818K1
High Capacity
DIMENSIONS APPROXIMATE IN MM (INCHES)
96.82 (3.812) 83.34 Mtg. (3.281)
35.71 Max.
(1.406)
19.84 (.781)
(1.25
57.15 Max. (2.250)
CAPACITIVE (FIGURE 2)
AH Test Criteria
Typical
Initial
Peak
\\
CUIIeit
\\'-
\\\
Pi i rront CU Ilei 11
Time
INDUCTIVE (FIGURE 1)
Time
|2~19|

pageCatalog pdf di En 2012-05-19-11