What is BS EN IEC 61000‑3‑11 -Electromagnetic compatibility about?
BS EN IEC 61000 discusses electromagnetic compatibility (EMC). BS EN IEC 61000‑3‑11 is the third part of multi-series BS EN IEC 61000 and discusses voltage limits. BS EN IEC 61000‑3‑11 is concerned with the emission of voltage changes, voltage fluctuations, and flicker produced by equipment and impressed on the public low-voltage supply system. It specifies the limits of voltage changes produced by equipment tested under specified conditions.
BS EN IEC 61000‑3‑11 is primarily applicable to electrical and electronic equipment having a rated input current from 16 A up to and including 75 A, which is intended to be connected to public low voltage distribution systems having nominal system voltages of between 220 V and 250 V, line-to-neutral at 50 Hz, and which is subject to conditional connection.
BS EN IEC 61000‑3‑11 is also applicable to equipment within the scope of IEC 61000-3-3 that does not meet the limits when tested or evaluated with reference impedance Zref and is therefore subject to conditional connection. Equipment that meets the requirements of IEC 61000-3-3 is excluded from this part of IEC 61000.
Note 1: The flicker limits specified in BS EN IEC 61000‑3‑11, being the same as those in IEC 61000-3-3, are based on the subjective severity of the flicker imposed on the light from 230 V/60 W coiled-coil filament lamps when subjected to fluctuations of the supply voltage. For systems with nominal voltages less than 220 V, line-to-neutral and/or frequency of 60 Hz, the limits and reference circuit values are under consideration.
Note 2: The limits in BS EN IEC 61000‑3‑11relate to the voltage changes experienced by consumers connected at the interface between the public supply low-voltage network and the equipment user’s installation. Therefore, it cannot be guaranteed that the users of equipment compliant with this standard will not experience supply disturbance within their own installation due to the operation of this equipment alone, as the impedance at the point of connection of the equipment to the supply within the installation can have an impedance greater than the maximum permissible impedance as determined by the procedures in BS EN IEC 61000‑3‑11.
Who is BS EN IEC 61000‑3‑11 -Electromagnetic compatibility for?
BS EN IEC 61000‑3‑11 on electromagnetic compatibility (limits) is useful for:
- Lifts, escalators manufacturers
- Electrical engineers
- Electronics engineers
- Quality control personnel
- Health and safety bodies
Why should you use BS EN IEC 61000‑3‑11 -Electromagnetic compatibility?
Electromagnetic compatibility (EMC) is the ability of electrical equipment and systems to function acceptably in their electromagnetic environmnet by limiting the unintentional generation, propagation, and reception of electromagnetic energy which may cause unwanted effects such as electromagnetic intereference (EMI) or even physical damage in operational equipment. The goal of EMC is the correct operation of different equipment in a common electromagnetic environment.
BS EN IEC 61000‑3‑11 guides you with the electromagnetic ranges for different types of products. BS EN IEC 61000‑3‑11 also provides tests to assess the voltage changes and flicker. The tests in BS EN IEC 61000‑3‑11 include the impedance Ztest, a test of equipment against Ztest, and an evaluation against Zref. A comparison of the calculated and measured emission value limits helps to enable a declaration of compliance and calculation of the maximum permissible system impedance. BS EN IEC 61000‑3‑11 helps you to maintain the limits of electromagnetic compatibility for different types of equipment.
What’s changed since the last update?
BS EN IEC 61000‑3‑11:2019 supersedes BS EN 61000‑3‑11:2001, which is withdrawn. BS EN IEC 61000‑3‑11:2019 includes some technical changes with respect to BS EN 61000‑3‑11:2001. These include:
- Addition of a new Annex A which explains the limitations and effectiveness of IEC 61000-3-11 regarding the connection of multiple items of similar equipment at the same location in the supply network.
