Fire-fighting-enterprises Vibration Switch: Weatherproof Manuel d'utilisateur

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Weatherproof Vibration Switch
Types 3171MR and 3171S
Installation and Operating
Manual
EN
1. Introduction
The type 3171 is a low-cost, vibration-sensitive, safety switch for the protection of rotating and
reciprocating machinery. It is adjusted to operate above the machine's normal running levels of
vibration, activating machine shut-down circuits and/or alarms and to switch off the machine
before catastrophic failure.
The switch detects vibration in all directions. Unbalanced forces created by failing machinery
contain both the fundamental frequency and harmonics. The switch responds by shutting off the
machine if any components of vibration exceed the set value.
The switch operates as follows:
Mounted vertically on a vibrating machine, a steel ball is held by a permanent magnet into
a conical seat
If the vibration of the machine is sufficient to cause the ball to detach from the magnetic
field of the magnet, it trips a latched lever, thus releasing a micro switch plunger so the
machine can be stopped
In type 3171MR, the ball and lever are latched by pressing the reset button manually
In type 3171S, the ball and lever are latched by actuating a solenoid remotely, using an
electrical signal or by pressing the reset button manually
The SET LEVEL of the vibration switch is set by adjusting the gap between permanent
magnet and ball.
Consult the FFE website at www.ffeuk.com for the latest information on applications and any
new warnings that may affect installation or safety.
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Résumé du contenu

Page 1 - Installation and Operating

Weatherproof Vibration SwitchTypes 3171MR and 3171SInstallation and OperatingManualEN1. IntroductionThe type 3171 is a low-cost, vibration-sensitive,

Page 2 - 3. Mechanical Installation

22. Warnings and CautionsRead all Warnings and Cautions before Installation and Set-up.2.1 Warnings2.2 CautionsWARNING !• Risk of electric shock3. Mec

Page 3 - 4. Electrical Installation

33.2 Mechanical Installation DetailsThe vibration switch must be fitted on the machine structure so that good transmission isensured from the likely s

Page 4

4x43mm hex4.2 Electrical Installation - Details• To avoid breaking the lid hinge, DO NOT push on the lid when fully open.Figure 3: Electrical Installa

Page 5

5Figure 4: Wiring ConfigurationSwitches are shown in their reset state.x43mm hex1Nm max.Check lever moves freely up and down.

Page 6 - 5. Set-up Sequence

6Remove SETLEVEL CAP.With machine running,reset switch.Tripped ?Tripped ?Is an increase insensitivity required ?Switch is set.Retract SET LEVEL SCREWs

Page 7

7The vibration switch is factory set accurately to 3 g. The SET LEVEL can be estimated byreferring to the calibration curve in figure 6 and counting t

Page 8 - 6. Functional Test

88. AccessoriesPart Number Description Picture1000-026 LID ASSEMBLY - TYPE MR1000-028 LID ASSEMBLY - TYPE SG003 GLAND M20 TRS C I PS171 SEAL 400-02444

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