Siemens 3EL2 Operating Instructions Manual

© Siemens AG • 07/2003 Surge Arrester Type 3EL2 Operating instructions Order-No.: 928 00047 176 The copying, distribution and utilization of this document as well as the communication of its contents to others without expressed authorization is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or ornamental de ...

Contents Contents _________________________________________________________________________2 Technical data 4 Description 5 Design 5 Mode of operation 5 Transportation and storage 6 Screwed joints 7 Installation _______________________________________________________________________8 Accessories 8 Place of installation 8 Mounting the components 8 Installing of the arrester 9 Grounding 12 Terminal 12 Exploded view _______________ ...

3 The manufacturer of this surge arrester Siemens AG Power Transmission and Distribution Group High Voltage Division has introduced and applies a quality system in accordance with DIN ISO 9001 / EN 29 001 Quality systems: Model for quality assurance This system was first demonstrated in 1989 to the DQS (German Association for the Certification of Quality Systems). The electrical testing laboratories and the materials technology la ...

The 3EL2 surge arrester serves to protect the insulation of a system (or of one of its components) from undue stresses resulting from overvoltages. Technical data The standard model is suitable for an installation altitude of up to 1000 m above sea-level and for a rated frequency between 48 Hz and 62 Hz. Fig. 1 Surge arrester type 3EL2 The surge arrester meets the following standards: Standard Classification VDE 0675, Teil 4/A2 ...

5 1 Order number 3 Year of manufacture 2 Rated voltage 4 Unit no. Fig. 3 Module plate Description Design The active components of the arrester are metal oxide resistors. They are arranged in a stack and hermetically protected against environmental influences by means of a directly mounted silicon enclo- sure. The mechanical strength is attained by glass-fibre-reinforced polymer rods which tightly enclose and compress the resistor ...

1 Polymeric composite housing 2 Non-linear metal-oxide resistor 3 Insulating rods 4 Flange Fig. 4 Sectional view of a modular unit Transportation and storage The modules of the surge arrester are packed in boxes or crates in the factory in accordance not only with the stresses and climatic conditions they will encounter during shipping. but also with the require- ments of the customer. The packaging will have the appropriate tra ...

7 1 Polymeric composite housing 2 Protective packing for installation/transport Fig. 5 Protective packing for installation/transport Screwed joints For mounting the arrester use only the bolts supplied. Grease the bolt threads with Molykote Longterm 2 plus. Attention Unchecked tightening can result in damage to or loosing of bolt joints Use torque wrench for assembly. Necessary torque for screwed joints: M 8: 18 ± 2 Nm 13 ± 1.5 ...

Installation Important note: Note the following before installing: Warning Before any work starts: � switch off and isolate � secure against reclosing � verity that equipment is dead � earth and short circuit the equipment � cover or fence off nearby live parts Death, severe injury and considerable damage to property and environmental damage may result if the safety instructions are not followed. � Confirm that these ...

9 Installing of the arrester Attention Danger of damage to the interior of the arrester � Do not lean a ladder against the surge arrester. The contact faces of the flanges of the arresters must be cleaned with a steel brush, if necessary. With arresters consisting of several units the units must be placed one on top of the other in the se- quence of their numbers marked on the rating plate [Fig. 2, Fig. 3, Fig. 6]. Attention Dan ...

Fig. 7 Lifting gear Fig. 8 Drilling plan / direct mounting standing installation The arrester must be placed and mounted with four rag bolts M10 on a concrete foundation or with four bolts M10 on the support [Fig. 9] by means of appropriate lifting gear (crane, tackle) comprising slings and lifting lugs [Fig. 7]. Fig. 9 unisolated 4-hole mounting Basic plate for isolated installation, 3 hole mounting ø200 … ø 276 mm 3× M12 ...

11 lower insulating sockets. The arrester must be placed and mounted with four bolts M10 × 50 on the base plate by means of appropriate lifting gear (crane, tackle) comprising slings and lifting lugs [Fig. 7]. Fig. 10 Basic plate for isolated installation, 3 hole mounting Ø 200 … 276 mm 3× M12 Basic plate for isolated installation, 4 hole mounting 200 × 200 mm² 4× M16 Attention Do not remove the insulating tube from the bo ...

1 Support 2 Lower insulating socket 3 Base plate 4 upper insulating socket 5 Arrester Fig. 12 Basic plate for isolated installation, 4-hole mounting 310 × 310 mm² 4× M20 suspended installation The top and bottom plates may have to be exchanged together with their associated bolts and insulat- ing parts to make it into a hanging version [Fig. 1], [Fig. 17]. In other respects, the arrester must be installed at site in accordan ...

13 Fig. 13 Terminal with cable eye Bolt terminal, DIN-flat terminal or NEMA-flat terminal If the terminal is mounted by means of a bolt terminal [Fig. 14] or a flat terminal [Fig. 15], [Fig. 16], the necessary accessories are already installed by the manufacturer. Fig. 14 Bolt terminal Fig. 15 Flat terminal DIN Fig. 16 Flat terminal NEMA ...

Exploded view Item Qty Designation 1a, 1b 4 8 4 Screw M10 × 35 Washer 10,5 Nut M10 1c 4 7 3 Screw M10 × 35 Washer 10,5 Nut M10 3 0/4 Strut 4 0/1 Grading ring 5 0/4 0/4 0/4 Screw M10 × 25 Washer 10,5 Nut M10 6 1/2 Polymeric composite housing 7 0/4 0/8 0/4 Screw M10 × 50 Washer 10,5 Nut M10 8 1 Rating plate 9 0/2 Rating plate for unit 10a 1 Plate 10b 1 Flat terminal DIN / NEMA 10c 1 Bolt terminal with plate 11a 1 Plate 11b 1 ...

Maintenance Warning Before any work starts: � switch off and isolate � secure against reclosing � verity that equipment is dead � earth and short circuit the equipment � cover or fence off nearby live parts Death, severe injury and considerable damage to property and environmental damage may result if the safety instructions are not followed. � Confirm that these safety measures have been carried out. For technical ...