Murphy Switch VS94 User Manual

VS-94092B  
Revised 03-03  
Catalog Section 20  
(00-02-0077)  
Shock and Vibration Control Switch  
VS94 Model  
NEMA 4X/IP66 Enclosure (CSA Types 4 & 12)  
Protects Your Equipment from Excessive  
Shock or Vibration  
Fine Adjustment to Precisely Select the  
Degree of Sensitivity  
Reset from a Remote Location (Optional)  
Time Delay to Override Trip Operation  
at Start-up (Optional)  
Space Heater to Prevent Moisture  
VS94 Model  
Condensation Inside the Unit (Optional)  
Description  
Applications  
Remote Reset (Optional)  
VS94 Series is an electro-mechanical device Applications for the VS94 include all sta-  
Adjustable Start-up Time Delay (Optional)  
Space Heater Circuit to Prevent Housing  
Moisture Condensation (Optional)  
Two (2) versatile SPDT snap-switches  
rated up to 480 VAC.  
designed to protect equipment from damag-  
ing shock or vibration. This sensitive mech-  
anism can detect excessive shock or vibra-  
tion and shutdown the equipment before fur- tions such as in:  
ther damage occurs. A set of contacts is held  
tionary types of machinery or equipment  
where excessive shock/vibration can be  
damaging or poses a threat to normal opera-  
Cooling fans  
in a latched position through a magnetic  
latch mechanism. As the level of shock or  
vibration increases an inertia mass exerts  
force against the latch arm and forces it  
Engines  
Options  
Pump jacks  
Remote Reset  
Compressors  
This option of the VS94 includes a built-in  
electric solenoid which allows reset of  
tripped unit from a remote location.  
Available for 115 VAC or 24 VDC.  
Pumps  
away from the magnetic latch causing the  
Rotating and Reciprocating Machinery  
latch arm to separate and to operate the con-  
tacts. Sensitivity is obtained by adjusting the  
amount of air gap between the magnet and  
latch arm plate.  
Features  
Time Delay  
Electromechanical Design  
Overrides trip operation on start-up.  
The time delay option is field-adjustable  
from 5 seconds up to 6-1/2 minutes with an  
easy-to-adjust 20-turn potentiometer.  
Available for 115 VAC or 24 VDC.  
Detects Shock or Vibration in  
Three Planes of Motion  
The VS94 Series is housed in a NEMA 4/4X  
glass filled polyester enclosure and has a  
base mount. It is for applications in non-haz-  
ardous locations.  
NEMA 4/4X (CSA types 4 and 12)  
Weather-proof Enclosure  
Reliable Magnetic Latch Feature  
Micro Fine, Easy-to-Adjust  
Sensitivity Adjustment  
Space Heater  
This optional circuit prevents moisture con-  
densation inside the VS94 housing.  
VS94 models are rated up to 480 VAC.  
(See the How to Order section on back page  
for models and options available.)  
Manual Reset (Standard)  
 

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