Electrical Connections; Safety Instructions - Siemens 8DJH Installation And Operating Instructions Manual
Medium-voltage switchgear
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- Installation and operating instructions manual (129 pages) ,
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7 | Installation
7.21 Electrical connections
7.21.1 Safety instructions
102/174
Live parts
Touching live parts leads to a life-endangering electric shock. Observe the Five Safety Rules:
⇨ Isolate.
⇨ Secure against reclosing.
⇨ Verify safe isolation from supply.
⇨ Earth and short-circuit.
⇨ Cover or barrier adjacent live parts
Inappropriate installation of the cable plug
Insufficient electrical contact, abrasion, damage or pollution of the cable plugs can cause an
internal arc during operation.
⇨ All assembly work at the bushings must be carried out with particular care.
⇨ Avoid damaging the contact surfaces and the silicone surfaces.
⇨ Avoid damages caused by the threaded stud while pushing on the cable plugs.
⇨ Do not mount plug sets in bent or twisted manner.
⇨ Do not exceed the maximum tightening torque of the bushings (50 Nm).
⇨ Mount the cable plugs according to the manufacturer's stipulations. If there are no
manufacturer stipulations, please contact the Siemens Service Hotline.
⇨ Observe extreme cleanliness. No smoking.
Feeder without connection cables
A switchgear without installed connection cables (e.g. spare feeder) can cause an internal
arc during operation.
⇨ Install surge-proof caps at the cable connection.
⇨ Alternatively, switch the three-position disconnector or three-position switch-
disconnector of the spare feeder to EARTHED position, and lock it.
Remove the protection ring
A white plastic protection ring may be assembled on the outside-cone bushing type C. The
protection ring serves as a stop for the plug. Removing the protection ring can cause
damage at the connection of the capacitive voltage detecting system.
⇨ Do not remove the protection ring.
Fig. 123: Protection ring at the bushing
8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
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