Robertshaw 365A, E365A Instruction Manual
INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR
MODEL 365A
MODEL E365A
ROBERTSHAW INDUSTRIAL PRODUCTS
1602 Mustang Drive
Maryville, TN 37801
Telephone 865-981-3100
Fax 865-981-3168
909GF294
Revision F
8 January 2008
MODEL 365A & E365A INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR 909GF294
CAUTION
NO CHANGES WITHOUT AGENCY APPROVAL
ATEX (DEMCO) VIA UL HAZARDOUS LOCATIONS GROUP.
RECORD OF CHANGES
Revision
F
Design
Engineer’s
Approval
P. Kronau
Engineering
Manager’s
Approval
Brien Evans
Approval
Date
14JAN08
COS
Number
96557
Brief Description
Added “CAUTION” note
and “RECORD OF
CHANGES” table.
PAGE a
MODEL 365A & E365A INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR 909GF294
TABLE OF CONTENTS
1 DESCRIPTION.............................................................................................................................1
1.1 GENERAL.....................................................................................................................................1
1.2 MODEL IDENTIFICATION.......................................................................................................2
2 SPECIFICATIONS.......................................................................................................................3
2.1 ENVIRONMENTAL.....................................................................................................................3
2.2 CE PRODUCT CERTIFICATION.............................................................................................3
2.3 ELECTRICAL...............................................................................................................................3
2.4 PERFORMANCE .........................................................................................................................4
3 INSTALLATION ..........................................................................................................................5
3.1 GENERAL.....................................................................................................................................5
3.2 MOUNTING..................................................................................................................................5
3.3 SPACE HEATER..........................................................................................................................6
3.4 WIRING.........................................................................................................................................6
4 OPERATION...............................................................................................................................11
4.1 GENERAL...................................................................................................................................11
4.2 ADJUSTMENTS OF OPERATING SETPOINT ....................................................................12
5 MAINTENANCE ........................................................................................................................15
5.1 FUNCTIONAL TEST.................................................................................................................15
5.2 TROUBLESHOOTING ..............................................................................................................15
5.2.1 VIBRASWITCH® WILL NOT RESET...................................................................................15
5.2.2 UNABLE TO ADJUST SETPOINT TO OBTAIN TRIP........................................................16
5.2.3 SWITCH DOES NOT ACTUATE.............................................................................................16
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MODEL 365A & E365A INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR 909GF294
LIST OF TABLES
A KEY MODEL NUMBER .............................................................................................................2
1 SWITCH CONTACTS .................................................................................................................2
2 REMOTE RESET OPTION ........................................................................................................2
3 ENCLOSURE FINISH .................................................................................................................2
3.1 SPACE HEATER RESISTOR VALUES....................................................................................6
5.1 RESET COIL RESISTANCE....................................................................................................15
LIST OF FIGURES
3.1 MODEL IDENTIFICATION & MOUNTING DETAILS........................................... 7
3.2 CONNECTIONS.............................................................................................................. 8
3.3 METHODS OF MOUNTING THE VIBRASWITCH®, MODEL 365A...........................9
3.4 PREPARATION OF CONDUIT WIRING........................................................................10
3.5 CONNECTION OF CONDUIT WIRING TO UNIT ......................................................10
4.1 OPERATING PRINCIPLE FOR THE VIBRASWITCH®, MODEL 365A.........................11
4.2 SETPOINT ADJUSTMENT ......................................................................................................12
4.3 SUGGESTED SETTINGS WHEN “NORMAL” g-LEVEL IS >1.0 g...................................14
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MODEL 365A & E365A INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR 909GF294
1. DESCRIPTION
1.1 GENERAL
The Model 365A & E365A Vibraswitch® Malfunction Detector provides protection for large motors,
pumps, compressors and other rotating equipment. Failing bearings, bent shafts, broken blades over
speeding and other similar malfunctions cause increased imbalance or high frequency vibration that is
detectable by the Model 365A & E365A Vibraswitch®. The Vibraswitch® may be wired to actuate an
alarm or cause a shutdown before costly damage occurs. It is designed for maintenance-free service in
permanently mounted installations.
The Vibraswitch® is an acceleration sensitive device that sensitive to the total acceleratory
shock/vibration that is present on the machine. Acceleration is a vibration characteristic of prime
importance in cases of failure on reciprocating or rotating machinery. Newton’s second law of motion
states that the force exerted on a body by its’ mass is multiplied by its’ acceleration (F=M*A). Thus the
destructive force acting on a bearing is directly dependent on the acceleration of the masses involved at
the shaft, which is supported by the bearings.
It should be noted that the measurements made by the Vibraswitch® are the summation of all of the
individual accelerations acting on the machine, giving the maximum possible protection.
It can be supplied with, or without, a remote reset coil. The remote reset coil provides a means of
resetting the switch after a trip, or holding the switch in the “normal” condition during transient
conditions, such as machine startup. The Vibraswitch® is also available with low power contacts for use
when interfacing with computer systems and PLC’s.
Up to a total of eight (8) Model 365A & E365A can be used in conjunction with the Robertshaw Model
563A Vibraswitch® Monitor to provide startup and monitor delays for a single machine being
monitored.
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MODEL 365A & E365A INSTRUCTION MANUAL
VIBRASWITCH® MALFUNCTION DETECTOR 909GF294
1.2 MODEL IDENTIFICATION
365A – A – 4 – H
Table A – Key Model Numbers
Table 1 – Switch Contacts
Table 2 – Remote Option Reset
Table 3 – Enclosure Finish
Table A – KEY MODEL NO.
Model No. Description
365A
E365A
Designation Description
A SPDT – Single pole, Double throw switch.
D DPDT – Two single pole, double throw switches.
G DPDT – Two single pole, double throw sealed switches with gold plated
Designation Description
0 No reset coil.
1 12 VDC reset coil.
2 24 VDC reset coil.
3 240 VAC reset coil.
4 48 VDC reset coil.
7 120 VDC reset coil.
8 120 VAC reset coil.
Designation Description
(None) Aluminum Alloy, no finish
B Black anodize.
E Gray epoxy paint.
H Space heater installed to reduce internal moisture.
BH Black anodize and space heater installed to reduce internal moisture.
EH Gray epoxy paint and space heater to reduce internal moisture..
Vibraswitch®, 0-4.5g’s, housed in an explosion-proof and weatherproof
enclosure (see specifications section for complete ratings).
Vibraswitch®, 0-4.5g’s, housed in an explosion-proof and weatherproof
enclosure with CE (ATEX) certification (see specifications section for
complete ratings).
Table 1 – SWITCH CONTACTS
contacts for low voltage/current applications
Table 2 – REMOTE OPTION RESET
Table 3 – Enclosure Finish
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