Surge Arresters

Product catalog summary

Overview
Surge arresters are essential for protecting electrical distribution systems, consumer supplies, and transformers from overvoltage caused by lightning and switching actions. Ensto's surge arresters, specifically the SE 45 and SE 46 series, are designed for easy installation and replacement, providing effective protection for low voltage networks.

Specifications
1. Application: Suitable for outdoor use, resistant to UV radiation and moisture, and can operate in temperatures ranging from -60°C to +70°C. They are designed for low voltage networks, from transformers to measuring instruments.
2. Technical Data:

Voltage systems up to 660 V
Network frequency up to 62 Hz
Nominal discharge current: 5 kA or 10 kA
Maximum discharge current: 25 kA or 40 kA
High current impulse: 40 kA or 65 kA
Classification: IEC 61643-1 class II and DIN/VDE 0675/6 class A

Features and Advantages
1. Installation: Equipped with shear head bolts for easy installation using standard tools, allowing live line installation.
2. Replacement: Defective surge arresters can be replaced without unscrewing the connector from the conductor.
3. Design: Includes a failure indicator visible from 10 meters, and can be delivered with or without a disconnector.

SE 45 Series
Designed for installation on insulated LV overhead lines with Al/Cu conductors (10 - 150 mm²). The series includes various models with different continuous operating voltages, rated discharge currents, and voltage protection levels.

SE 46 Series
Allows installation on insulated conductors and branch connections, suitable for Al conductors (10 - 95 mm²) and Cu conductors (1.5 - 70 mm²). Similar to the SE 45 series, it offers models with varying specifications.

Contact Information
Ensto Finland Oy, Ensio Miettisen katu 2, P.O. Box 77, FIN-06101 Porvoo, Finland. Email: [email protected], Website: www.ensto.com

Catalog excerpts

Saves Your Energy Surge Arresters Protection against overvoltage

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Surge arresters with insulation piercing connector, SE 45 and SE 46 Overvoltage protection is needed e.g. for electriity distribution and supply, consumer in house supplies and distribution transformers ue d to lightning strokes and switching actions. The most effective means of protection is the use of surge arresters in the vicinity of electricity equipment. Thanks to the special construction of the connectors, Ensto surge arresters are screwed to the lower part of the connector giving thus a proper electrical connection. Connectors are equipped with shear head bolts and can be installed...

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• Outdoor application, UV radiation resistant and moisture proof housing • Operation and storage temperatures: -60°C to + 70°C • Humidity up to 90 % • Altitude up to 2000 m • Delivered with or without disconnector on request • incl. failure indicator, easy to see from 10 m distance • Easy to connect, no special mounting tools are required • Easy to replace a defective surge arrester • Suits for most demanding weather conditions, temperature range -60°C to + 70°C Technical data for surge arresters • For voltage systems up to 660 V • Network frequency up to 62 Hz • Nominal discharge current In...

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Surge arresters with insulation piercing connector SE 45 SE 45 series includes a new piercing connector specially designed for surge arrester. This connector is used when installing the surge arrester on insulated LV overhead lines. It can be installed on insulated Al/Cu conductors with cross section range 10 - 150 mm2. SURGE ARRESTER RATED DISCHARGE CURRENT kA 5 VOLTAGE PROTECTION LEVEL V peak 1150 ENERGY ABSORPTION CONTINUOUS OPERATING VOLTAGE v 280 EARTHING TERMINAL M8 screw

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Surge arresters with insulation piercing connector SE 46 The design of SE 46 series enables installation on insulated conductor and branch connection, the same connector is used for both. Connector can be installed on insulated Al conductors with cross section range 10 – 95 mm2 and Cu conductors with cross section range 1,5 – 70 mm2 and branch connection with the same range of conductors. SURGE ARRESTER RATED DISCHARGE CURRENT kA 5 VOLTAGE PROTECTION LEVEL V peak 1150 ENERGY ABSORPTION CONTINUOUS OPERATING VOLTAGE v 280 EARTHING TERMINAL M8 screw

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