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2014-01-06
20140106 Safety Information
Information products standard IEC/EN/UL60950-1, the provisions of 2.5 LPS test
requirements described
Information products, such as universal connector USB, RJ45 (PoE) are required to
meet LPS. Also the power supply output for as LPS, the use of the power supply end
products will have greater flexibility in the choice of shell material. Therefore, the
requirements of LPS are often asked to discuss how to meet the requirements,
the following is a simple explanation:
1. Product output voltage and current, respectively, to meet the requirements in
accordance with Table 2B and there must not exceed 100VA limit, as vendors line
design with OCP or OPP or PTC reversible manner, such as restrictions Output A,
VA, but only if the action within 5 seconds .
IEC60950-1, 2nd Ed + A2:. 2013 version, for PTC way to limit the output A, VA modified
to move to within 60 seconds for protection.
2. If the output is less than 250VA accordance with Table 2C is able to meet the
requirements as LPS, mainly at the output must be coupled with over-current
protection device (such as Fuse), so OCP, OPP, etc. can wait 60 seconds before action
can be protected. OCP may be designed to come later proposed action, so it is possible
to meet standard requirements and design.
requirements described
Information products, such as universal connector USB, RJ45 (PoE) are required to
meet LPS. Also the power supply output for as LPS, the use of the power supply end
products will have greater flexibility in the choice of shell material. Therefore, the
requirements of LPS are often asked to discuss how to meet the requirements,
the following is a simple explanation:
1. Product output voltage and current, respectively, to meet the requirements in
accordance with Table 2B and there must not exceed 100VA limit, as vendors line
design with OCP or OPP or PTC reversible manner, such as restrictions Output A,
VA, but only if the action within 5 seconds .
IEC60950-1, 2nd Ed + A2:. 2013 version, for PTC way to limit the output A, VA modified
to move to within 60 seconds for protection.
2. If the output is less than 250VA accordance with Table 2C is able to meet the
requirements as LPS, mainly at the output must be coupled with over-current
protection device (such as Fuse), so OCP, OPP, etc. can wait 60 seconds before action
can be protected. OCP may be designed to come later proposed action, so it is possible
to meet standard requirements and design.
