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Model E365A Vibration Switch

Image of Robertshaw's 365A and E365 vibration switch for hazardous areasThe Model 365A and E365A vibration switches provide 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 365A and E365A vibration switches. The instruments may be wired to actuate an alarm or cause a
shutdown before costly damage occurs. They are designed for maintenance-free service in permanent installations.

The vibration switches are acceleration sensitive instruments that measure 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 switches are the summation of all the individual accelerations giving a total destructive force acting on the machine - the result is positive protection.

With the growing use of computers, an increasing number of applications are coming into existence where a vibration switch will be connected to a computer or PLC. In these applications the voltage and/or current may be too low for standard contacts.
For these applications the Model 365A and E365A may be supplied with an optional sealed switch with gold contacts.

Features & Benefits

Explosion Proof (Flame Proof) UL & c-UL Certified (Model 365A) UL, c-UL & CE (ATEX) Certified (Model E365A)

Weather Proof Type 4 & IP66 (all models) Type 4X (optional)

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

Optional Gold Contacts For low voltage/current applications

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 Either AC or DC voltages available

Popular Models - See Data Sheet for Other Models and Specifications

E365A-A8 Robertshaw Model E365A-A8 Vibraswitch
UL Certified for the USA and c-UL Certified for Canada with SPDT (single pole, double throw load contacts and 120 VAC reset coil

E365A-D8 Robertshaw Model E365A-D8 Vibraswitch, UL Certified for the USA and c-UL Certified for Canada  with DPDT  (2-gang mounted SPDT load switches) and 120 VAC reset coil

E365-A8 Robertshaw Model E365-A8, CE(ATEX) Certified for Europe, UL Certified for the USA and c-UL Certified for Canada with SPDT (single pole, double throw load contacts and 48 VDC reset coil

E365-D8 Robertshaw Model E365-A8, CE(ATEX) Certified for Europe, UL Certified for the USA and c-UL Certified for Canada with DPDT  (2-gang mounted SPDT load switches) and 120 VAC reset coil