RPS 3EGF020333, Руководство пользователя

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After an overload occurs, the drive motor is switched off for approx-
imately 2 s. After the switch-off, the mast disconnector remains in
the same position. Further activation is not possible for at least
10 s and it involves a new switching command in the opposite
direction to the original movement.
To prevent electric activation of the TracFeed
®
SFA when the
enclosure door is open, a door contact (Fig. 3/4) is installed. When
the enclosure door is open, the door contact interrupts the power
supply and it only enables the current when pressed.
The gearbox cannot be overwound when operated using the crank
handle as it is fitted with a limit stop (Fig. 3/2). This limits the stroke
movement of the adjusting lever, which prevents damage to the
gearbox due to improper operation.
To protect personnel against touch voltage when working on the
TracFeed
® SFA, the enclosure is earthed. If assembled on a pole,
the enclosure is earthed via the pole; if assembled on concrete
walls, the remote motor drive must be connected to the railway
earthing system.
1 Switch S2
2 Switch S1
3 Limit switch
4 Wedge
A wedge (Fig. 4/4) is attached to the gear unit; this moves when
the gearbox moves if the adjusting lever moves to the “ON” or
“OFF” position. For the electrical switch stroke, there are two limit
switches (Fig. 4/3) fitted to the end positions of the gear; these
interrupt the power supply when the corresponding end position is
reached. Switch S1 (Fig. 4/2) activates in the “OFF” position,
switch S2 (Fig. 4/1) activates in the “ON” position.
Door contact
Limit stop on the gear unit
Potential equalisation
Limit switch on the gear unit
Fig. 4: Limit switch
Safety
Safety devices > Description of the safety devices
14.09.2022 TracFeed ® SFA Electromechanical remote motor drive 27