ETSI EN 300 132-2 Telecom DC Power Port Testing to Change in September

On September 30, 2012, the previous version of ETSI EN 300 132-2 will be withdrawn, and ETSI EN 300 132-2 v2.4.6 (2011-12) will take effect.  ETSI 300 132-2 covers the testing requirements for the DC power ports of telecommunications equipment.  It is not a harmonized standard, but it is often required by EU carriers like Deutsche Telekom and British Telecom.

Here are the most significant additional requirements in this new revision:

4.2 Normal service voltage range at interface “A”
Test method now references EN 61000-4-29.  The voltage variations now have dwell time and rise/fall time requirements.

4.3.2 Abnormal service voltage range at interface “A”
Same as 4.2 above but with abnormal service range defined in table 2.

4.3.3 voltage transients
Same 1.2/50 or 8/20 combo waveform @500V, but only one configuration now.

4.4 voltage changes due to regulation of the power supply
Defines voltage variation ranges; test method remains the same as before.

4.6 Maximum current drain
The EUT’s current drain cannot exceed 1.5 x Imax only in the range of -54V to -40.5V.  For the range of -40.5V to 0V, it is allowed to exceed this amount.  This is different from before when the current drain could never exceed 1.5 x Imax throughout the entire range.

4.7 Inrush current on connection of interface “A”
Same as before but with the following additional performance criteria:

  • Below 0,1 ms, the inrush current is not defined
  • Below 0,9 ms the It/Im ratio shall be lower than 48
  • Above 1 ms the curve corresponds to the maximum tripping limit of majority of existing protective devices

4.8 Conducted immunity requirements of the telecommunications equipment at interface “A”: narrowband noise
Conducted immunity shall apply only to telecommunication equipment having analogue voice interface.

Additional Note 3: The test should be limited for equipment with an input not higher than 10A.

4.9 Conducted Emissions requirements of the telecommunications and datacom equipment at interface “A”
Conducted emissions requirements shall not be applicable at equipment installed in outdoor location such as shelters and street cabinets.  Due to the nature of the emitted noise this could be influenced only other equipment directly connected at the interface “A” present in the outdoor location.

For telecommunications equipment fitted with analogue interfaces an evaluation of wideband noise amplitude in this frequency band can be calculated using method detailed in annex E.

For more information, read an IN Compliance article on ETSI EN 300 132 2 Compliance Testing by MET Engineer Zijun Tong. 

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