Brochure

53
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Miniature snap switches
OsiSense XC
Miniature design
General
Characteristics (continued)
Actuation method (continued)
b Lever operators
v when actuation is by a roller lever, force should preferably be applied in the direction shown
in the diagrams opposite.
v where the movements involved are fast, the ramp should be so designed as to ensure that
the operator is not subjected to any violent impact or abrupt release.
Fixing - Tightening torque
b The tightening torque of the xing screws must conform to the following values:
Ø of xing screw 2 2.5 3 3.5 4
Tightening torque (cm.N) Maximum 25 35 60 100 150
Minimum 15 25 40 60 100
Resistance to mechanical shock and vibration
b Resistance to shock and vibration depends on the mass of the moving parts and on the
forces holding the contacts together.
b In general, for a miniature snap switch without accessory:
v vibration > 10 gn, 10 to 500 Hz,
v shock > 50 gn, 11 ms 1/2 sine wave.
Electrical characteristics
Operating curves
b These indicate the electrical life of the miniature snap switches under standard conditions
(20°C, 1 cycle/2 seconds), by showing the number of switching operations which can
be performed with given types of load. For sealed snap switches, the operating rate is
1 cycle/6s.
Insulation resistance
b The insulation resistance of the miniature snap switches is generally greater than 50,000 MW,
measured at 500 V DC.
Dielectric strength
b The dielectric strength of our miniature snap switches is generally superior to:
v 1500 Volts between live parts and earth,
v 1000 Volts between contacts,
v 600 Volts between contacts for switches with an inter-contact distance less than 0.3 mm.
Mounting,
characteristics
(continued)
0.1 0.2 0.5 12 5 16 A10
10
7
10
6
10
5
10
4
2
2
2
5
5
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Resistive circuit
Inductive circuit
Cos j 0.8
Number of cycles
Current
ABC
30°
30°
ABC