ABB

The OPR efficiency (ΔT)

Lightning is one of the most spectacular meteorological phenomena. Generated by the interaction of clouds elements (water and ice), it can kill, injure and damage. The unique efficiency of the OPR Early streamer emission is based on the difference (ΔT), measured in a laboratory, in between the emission time of the OPR and the one from a simple rod. The OPR ESE air terminal is composed of a striking point connected to a down conductor to conduct the lightning to the ground.

Complete autonomy

During a storm the ambient electric field may rise from 600 V to 10-20 kV/m. When the electric field reach this level representing a minimum risk for a lightning, the OPR begins to get activated and generates high voltage pulses, helping to create and propagating an upward leader. After a strike on the OPR, the lightning current is driven to ground by the down conductor to the earth termination system.

Radius of protection

The radius of protection (Rp) of the OPR is calculated according to the NF C 17-102 (edition 2011). It depends on the OPR efficiency (ΔT) expressed in micro-seconds. The maximum value for ΔT is 60 µs.

The risk assessment shall be calculated according to the NF C 17-102 Annex A /  IEC 62305-2 and will define the protection level (LPL I, II, III or IV) which will be used in the determination of the OPR radius of protection.

Surge Protective Devices are designed to protect against transient surge conditions. Large single surge events, such as lightning, can reach hundreds of thousands of volts and can cause immediate or intermittent equipment failure. However, lightning and utility power anomalies only account for 20% of transient surges. The remaining 80% of surge activity is produced internally. Although these surges may be smaller in magnitude, they occur more frequently and with continuous exposure can degrade sensitive electronic equipment within the facility.

Born from the experience of ABB, the first company
to launch them on a market which continues to choose
them, OVR PV photovoltaic SPDs ensure absolute
protection in photovoltaic installations. OVR PV SPDs
are equipped with a patented thermal disconnector, with
DC short circuit interruption performance, specially
designed in order to prevent the risks of overheating
and fires in photovoltaic installations up to 1000 V.
Thanks to this innovative technology, OVR PV SPDs are
self-protected from end-of-life short circuits up to 100 A DC without the necessity for back-up protection. This
performance is ensured by conformity to the guide UTE
EN 50539-11 and C61-740-51.

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ABB Cewe-Control has manufactured Industrial Plugs and Sockets for over 60 years in the factory located in Nyköping, Sweden. Long experience of developing and manufacturing plugs and sockets within ABB has resulted in a wide product range of high quality and a robust ergonomic design. Covering products up to 125 A and 690 V, all tested and approved for IEC standards.

The design and material used have continuously been improved to meet the customer’s requirements, and to take the environmental aspects into consideration.

ABB Industrial Plugs and Sockets have the solution for products in industrial environments with high demands on safety, durability, reliability and cost saving for the end user. • Safety - tested and approved by third party testing laboratories.
• Durability - materials used give a high durability in tough conditions and environments.
• Reliability - high quality contacts ensure reliability. • Cost saving - designed for quick and easy installation.

You will find all you need in the ABB Industrial Plugs and Sockets product range. One supplier for all your needs and worldwide availability.