Fire Fighting Enterprises Vibration Switch: Weatherproof - Manual (Page 3)

3
3.2 Mechanical Installation Details
The vibration switch must be fitted on the machine structure so that good transmission is
ensured from the likely source of excess vibration.
The vibration switch shall be firmly fixed in the vertical orientation shown in figure 1 to a vertical
surface of the vibrating machine using M5 fixings suitably resistant to vibration.
Figure 1: Mechanical installation to the surface of the vibrating machine
VERTICAL
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Set Level Cap
Transport
Plug
M5 fixings
in the two
places
M5 fixings
in the two
places
Cable
Entry
Cap
Switch
Rating
Label
4. Electrical Installation
4.1 Introduction
• Do not exceed the switch contact ratings. The primary switching circuit is rated at 5 Amp
maximum and must be fused appropriately in line with the protected machine’s mains
supply and isolation device
• The DC-operated solenoid has a duty cycle of 25%. It is advised that a time limiter or
mono-stable device be fitted in line to automatically disconnect the solenoid supply after 30
seconds
• When connection is by a cord, the Earth wire connection must be longer than the Live and
Neutral wires, such that failure of the strain relief will cause the Earth wire to be the last
conductor interrupted
• To prevent water running down onto the vibration switch, add a ‘drip loop’ in any external
cabling
• For ambient temperatures below –10°C, use external wiring rated for the minimum ambient
temperature expected