IEEE Std 16-2020 pdf download
IEEE Std 16-2020 pdf download.IEEE Standard for Electrical and Electronic Control Apparatus on Rail Vehicles.
The equipment shall not be damaged when subjected either to a voltage from zero to the minimum operating voltage or to positive or negative voltage steps between minimum and maximum operating voltages.
NOTE 1—It is recommended that equipment be designed not to be damaged when continuously subjected to nominal low voltage power supply (LVPS) output voltage at reverse polarity, combined with voltage fluctuations and transients as defined in this standard.
NOTE 2—Power supplies within equipment connected to the LVPS arc not specifically addressed, but the supply voltage quality and the loads should be coordinated for proper functionality in order to meet the overall requirements of this standard.
NOTE 3—In some cases, LVPS voltage may rise gradually as a result of float battery charging. This standard requires functionality within certain voltage ranges. Therefore, equipment that requires a fast rate of rise of supply voltage may not ultimately meet the system requirements.
4.3.1.4 Electrostatic discharge
Protection shall be provided against electrostatic discharges (ESDs) in compliance with EN 50121-3- 2:2016, Table 9. The discharge is to be delivered to the enclosure in which the equipment is housed (if an enclosure exists), to the enclosure of each line-replaceable unit, and to all surfaces and controls that are accessible to operating staff and passengers (e.g., knobs, switches, fasteners, printed circuit board faceplates, handles). The equipment shall function properly after such testing.
NOTE—This requirement is not intended to apply to the contacts of electrical connectors that are exposed in the course of removing, replacing, and/or handling a line-replaceable unit.
ESD-sensitive equipment shall be labeled. The label shall be affixed in a location that clearly indicates the ESD concern to maintenance personnel.
4.3.1.5 Transients
With respect to immunity to fast transient bursts and immunity to surges, the equipment shall be designed in accordance with the requirements of EN 50121-3-2:2016 or IEC 62236-3-2 Ed2 (2008). Power supply inputs sourced from the low voltage system shall also withstand transients, with a 242 source impedance based on EN 50121-3-2:2016 or IEC 62236-3-2 Ed2 (2008), without damage or misoperation.
4.3.2 Interruptions
Equipment shall not be damaged when exposed to random interruptions in the power supply. The authority having jurisdiction shall specify the nature of the performance to be obtained under such conditions. In the absence of information from the authority having jurisdiction, the supplier shall identify the interruption criteria assumed for the design and resulting system response. High-voltage interruptions that occur frequently shall not require a deliberate fault reset action as a prerequisite for resumption of normal operation.
NOTE—Examples of high-voltage interruptions include, but are not limited to, bouncing of the power collector device (e.g., third rail shoe or pantograph). gaps in the third rail, phase/frequency breaks or supply transition zones in an overhead supply wire, and ice or snow buildup on the third rail or overhead supply wire. Examples of low voltage or auxiliary voltage interruptions include, but are not limited to, temporaly shutdown of the on-board power supply resulting from interruptions in the high voltage supply, short-term overloads of the low voltage or auxiliary power supply, and undercharged batteries.
4.4 Electromagnetic compatibility
Electromagnetic compatibility shall be verified by an Electromagnetic Compatibility (EMC) plan. Unless otherwise agreed between the supplier and the authority having jurisdiction, the plan shall be created in accordance with the requirements ofAPTA SS-E-0 10—98.
NOTE—Ordinarily the EMC plan is required of the vehicle supplier and contains requirements for the individual suppliers.
4.4.1 Train-wayside system compatibility
The authority having jurisdiction shall define the communication system and the wayside signal system operating frequency bands, coupling modes, and permissible vehicle or train emissions corresponding to those frequencies and coupling modes. Emissions limits shall be defined as a function of time duration if appropriate for a particular wayside system implementation.
