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Robertshaw
Vibration Protection Systems

 

Robertshaw Vibration Protection Systems - Download overview of products and applications
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Model 365 Vibration Switch

Robertshaw Model 365 vibration switch for hazardous areas

This unit is no longer available - see the 365A

The Model 365 vibration switch provides maximum protection for large motors, pumps, compressors, and other rotating equipment by responding to mechanical malfunctions the instant they occur. Failing bearings, bent shafts, broken blades, over-speeding and similar malfunctions cause increased imbalance or high frequency vibration detectable with the model 365 vibration switch. The instrument may be wired to actuate an alarm or cause a shutdown before costly damage occurs. It is designed for maintenance-free service in permanent installations.

The vibration switch is an acceleration sensitive instrument that measures the total acceleratory shock present on the machine. Acceleration is a vibration characteristic of prime importance in cases of mechanical failure on reciprocating or rotating machinery. Newton's second law of motion states that the force exerted on a body is equal to its' mass multiplied by its acceleration: F = MA. Thus the destructive forces acting on a bearing are directly dependent on the acceleration of the masses involved at the shaft which is supported by the bearings.

Acceleratory measurements made by the vibration switch are the summation of all the individual accelerations giving a total destructive force acting on the machine - the result is positive protection.

Features & Benefits

Explosion Proof- CSA Certified and FM approved. (Most models.)

Self Powered- Does not require external power to operate (Except remote reset.)

Acceleration Sensitive- Measures destructive forces.

Minimum Maintenance- No moving parts except at trip level.

Continuous Protection- No attention required after installation.

Ease of Installation- Requires no special training.

Long Life- Instrument is rugged and durable-no wear.

Ease of Adjustment- Set it and forget it-one adjustment.

Reset- Remote electrical or manual at unit.

AC or DC- Reset coil options.

O-Ring Shaft Seals Standard

 

Download the full datasheet

 

 

Popular Models - See Data Sheet for Other Models and Specifications
365A-A8 Robertshaw Model 365-A8 Vibraswitch® Explosion Proof (0-Ring shaft seals standard) Class I, Div 1, Groups C & D Class II, Div. 1, Groups E, F, & G. Range 0-4.5 G. with SPDT (single pole, double throw load contacts and 120 VAC reset coil
365A-D8 Robertshaw Model 365-D8 Vibraswitch® Explosion Proof (0-Ring shaft seals standard) Class I, Div 1, Groups C & D Class II, Div. 1, Groups E, F, & G. Range 0-4.5 G. with DPDT  (2-gang mounted SPDT load switches and 120 VAC reset coil
365A-A4 Robertshaw Model 365-A4 Vibraswitch® Explosion Proof (0-Ring shaft seals standard) Class I, Div 1, Groups C & D Class II, Div. 1, Groups E, F, & G. Range 0-4.5 G. with SPDT (single pole, double throw load contacts and 48 VDC reset coil
365A-A2 Robertshaw Model 365-A2 Vibraswitch® Explosion Proof (0-Ring shaft seals standard) Class I, Div 1, Groups C & D Class II, Div. 1, Groups E, F, & G. Range 0-4.5 G. with SPDT (single pole, double throw load contacts and 24 VDC reset coil

 

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