BA 2722549/00
18
4
Electrical connection
5 Operation
4 Electrical connection
The installed switches can be connected to a signaling device
or remote control room via a terminal strip in the terminal box.
4.1 Connection via terminal box
Open the terminal box (Fig. 1/6) using the 3 fi xing screws. Strip
the insulation from the cable for wiring and remove approx.
7 mm of insulation from the strands. Open the desired cable
gland (Fig. 1/9 or 1/10) M25x1.5 (for cables Ø 13...20 mm) (A/
F30) and push the cable through. Wire up the cable according
to the connection diagram printed on the inside of the cover
of the terminal box (refer to Appendix, Section 9.1, Fig. 8). The
connection diagram is equivalent to the error-free operating
condition. The cable gland and the terminal box must then be
resealed liquid-tight.
4.2 Device grounding
The device can be grounded with the grounding screw (Fig. 1/7)
outside the MSafe® and/or with the grounding screw inside the
terminal box (refer to Appendix, Fig. 8).
5 Operation
5.1 Alarm table
The Messko MSafe® is fi tted with up to 4 normally open,
normally closed and/or change-over contacts according to the
imprint on the inside of the terminal box. The following table
shows the switch positions for the normal operating conditions
and the error case.
5.2 Releasing of blocked fl ap valve (only MSafe with reset
function (optional))
The fl ap valve can be enabled again as follows:
Unscrew the cover sleeve (Fig. 7/2) using an open-ended
wrench (A/F24) and detach. Turn the test button located below
(Fig. 7/3) to the left up to the limit stop so that fl ap valve is
released again. Check this through the inspection glass of the
protective relay.
0° ...5°
0° ...5°
0° ...5°
to transformer
to transformer
1
2
3
1
MSafe
Shut-off valve
Oil conservator
MSafe
Fig. 5
Fig. 6
WARNING
Hazardous electrical voltages!
All connecting wiring must be free of voltage before opening
the device.
CAUTION
Electrical connections may only be carried out by qualifi ed,
skilled personnel trained in the applicable safety regulati-
ons of the relevant country.
Summary of Contents for MBR25-16
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