AS/NZS CISPR 15 – LED Lighting EMC Testing – EMC Requirements
In Australia lighting products before 9th February 2013 could be tested to AS/NZS CISPR 15: 2006. International equivalent standards were also accepted. Proof of at the time the C-Tick compliance. The Regulatory Compliance Mark scheme superseded the C-Tick scheme. This involved a conducted emissions test on the AC mains. Also radiated emissions (H-field) test on the enclosure. With both performed across the 9kHz to 30 MHz frequency band.
New LED lighting caused much EMI than the previous lighting technologies
We found through testing to other standards that this may not have been adequate. Many new lighting products, particularly LED lighting devices to produce excessive emissions. Noting significant radiated emissions above 30MHz. Many products that passed the older version of AS/NZS CISPR 15 (2006) did not pass the new requirements. Thus it became mandatory for radiated emissions above 30MHz (30MHz to 300MHz, E-Field).
The ACMA has reported that these devices can cause interference in the field. And polluting the radio spectrum. Affecting nearby radio communication devices, remote controls, radio receivers, and other sensitive electronics. Hence the importance of LED Lighting EMC Testing.
When a device is placed on the market the supplier has an obligation to not pollute the RF spectrum. Unfortunately, AS/NZS CISPR 15 did not keep pace with LED lighting technology at the time. Thus many units compliant with the older standard would fail the new standard. Products may comply with AS/NZS CISPR 15: 2006 still cause interference when installed. The supplier is still responsible for this and must take steps to resolve the matter.
EN 55015 & AS/NZS testing after 2013
The new version of AS/NZS CISPR 15 specifies measurements from 30MHz to 300 MHz. These measurements were mandatory as of 9th February 2013. External aftermarket electronic transformers or ballasts. The need to test a light fixture in a typical operating manner can pose several issues when the fixture is not supplied with a transformer. It may end up being used with a large number of completely different transformers other than the one used for the LED Lighting EMC Testing.
Often a fixture is presented with a typical transformer, which passes the AC mains conducted emissions test. The problem is that the transformer may have extra filtering that other transformers may not have. Hence a noisy fixture fitted with a transformer with little or no filtering (often non-compliant in its own right) may cause interference. This may be traced back to the supplier of the fixture.
We advise that the particular type and make of electronic transformer used for testing are referenced in the supplied documentation. The electronic transformer should be compliant in its own right. Or as the standard states using a step down linear transformer for LED Lighting EMC Testing.
A better method of compliance is to ensure that your product on its own without the transformer. Thus it does not cause interference and complies with the limits. This can be achieved by powering the unit directly via a suitable source.
Other Lighting Testing available at EMC Bayswater
EMC Bayswater can also test to the European CE Mark immunity standard EN 61547. EMC Bayswater has the capability for Lamp Circuit Power (LCP) testing. This is a requirement for the VEET and ESS energy schemes. We can offer mandatory accredited test reports. Click here for more details about Accredited Lamp Circuit Power (LCP) testing.
EMC Bayswater is the first laboratory in Australia to offer a complete testing service to EN 62493:2010. EN 62493:2010 is the “Assessment of Lighting Equipment Related to Human Exposure to Electromagnetic Fields”. This involves testing lighting products to the radiated emissions testing with a special “Van Der Hoofden” test head. Please click here for a photo of the EN 62493:2010 testing test head.