SIST EN 55012:2008/A1:2010

SIST EN 55012:2008/A1:2010 is the Slovenian adoption of EN 55012:2007/A1:2009, based on CISPR 12:2007/A1:2009. It specifies limits and measurement methods for radio disturbance from vehicles, boats and internal combustion engine powered devices, so that off-board receivers - especially broadcast receivers in residential environments - are protected in the 30 MHz to 1 000 MHz range.

What does SIST EN 55012:2008/A1:2010 specify?

SIST EN 55012:2008/A1:2010 specifies how to judge and measure emissions that may interfere with radio reception from vehicles, boats and devices with internal combustion engines, and in this amendment it also covers devices with traction batteries. The document is aimed at identifying which products are in scope and how the standard applies in practice.

The scope is tied to receivers in the residential environment. That matters because the standard is about protecting reception outside the product, not on-board receivers inside the same vehicle.

What are the key requirements of SIST EN 55012:2008/A1:2010?

SIST EN 55012:2008/A1:2010 sets the emission limits and measurement approach for disturbance from land vehicles, boats and internal combustion engine powered devices. In practice, the main task is to decide whether the product belongs in scope, then apply the correct measurement method and limits.

Scope and applicability

The standard applies to emissions from vehicles propelled by an internal combustion engine, electrical means or both; boats propelled by an internal combustion engine, electrical means or both; and devices equipped with internal combustion engines or traction batteries. For a buyer or test lab, that means the product family must be checked against the scope before testing starts.

Protection target

The limits are designed to protect broadcast receivers in the 30 MHz to 1 000 MHz band when used in residential environments. The note on distance near 10 m matters because the standard warns that protection may not be adequate for new radio transmissions or receivers closer than that.

Boats and unique characteristics

Boats are tested in the same manner as vehicles except where the standard explicitly gives boat-specific treatment. In practice, this means the vehicle-based method is the default unless the document says the boat behaves differently.

Exclusions and special cases

The standard does not apply to aircraft, household appliances, traction systems such as railway, tramway and electric trolley bus, or incomplete vehicles. For a dual-mode trolley bus, the internal combustion propulsion system is included, while the a.c./d.c. mains propulsion portion is excluded.

Charging-related emissions

The measurement of disturbances while the vehicle is connected to power mains for charging is outside the scope of this standard. Users are directed to other IEC and CISPR standards for that condition, so the charging mode needs separate EMC evaluation.

Applicability guidance

Annex G provides a decision flow chart for whether CISPR 12 applies. That is useful when a product sits near a boundary case, such as a road vehicle, boat or machine with an engine or electric motor.

What terms does SIST EN 55012:2008/A1:2010 define?

• vehicle - A machine operating on land that is intended to carry persons or goods.
• device - A machine driven by an internal combustion engine that is not primarily intended to carry persons or goods.
• traction batteries - High-power batteries used for electric vehicle traction applications.
• a.c./d.c. mains - Alternating-current or direct-current mains power; in a dual-mode trolley bus, this part is excluded from the standard.
• CISPR 12 - The underlying international standard for radio disturbance characteristics of vehicles, boats and internal combustion engine powered devices.

Who uses SIST EN 55012:2008/A1:2010?

SIST EN 55012:2008/A1:2010 is used by EMC engineers, test laboratories, quality managers and buyers who need to decide whether a product falls within the standard and how to test it. It is relevant to makers of cars, trucks, buses, boats, agricultural machinery, earth-moving machinery, material-handling equipment, mining equipment, floor treatment machines, snowmobiles, chainsaws, irrigation pumps, snow blowers, air compressors and landscaping equipment.

What changed in SIST EN 55012:2008/A1:2010 from the previous edition?

This amendment modifies EN 55012:2007 by changing the scope, definitions and applicability guidance. The stated changes are:

• item c) now includes devices equipped with internal combustion engines or traction batteries;
• the exclusions were expanded to include household appliances;
• the dual-mode trolley bus text was updated so the internal combustion propulsion system is included and the a.c./d.c. mains portion is excluded;
• the definition of vehicle was replaced;
• the definition of device was replaced;
• a new definition of traction batteries was added;
• Annex G was replaced with a new flow chart and notes.

Which standards are used with SIST EN 55012:2008/A1:2010?

SIST EN 55012:2008/A1:2010 points users to CISPR 25 for protection of receivers used on board the same vehicle as the disturbance source. It also refers users to appropriate IEC and CISPR standards for measuring emissions when the vehicle is connected to the mains for charging.

What does the SIST EN 55012:2008/A1:2010 document contain?

The amendment is focused rather than broad. It updates the scope text, revises key definitions in clause 3, and replaces Annex G with a new applicability flow chart. Annex H lists work being considered for future revisions. For someone doing compliance planning, the main value is the clarified boundary between in-scope vehicle and device types and the related exclusions.