Re: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

2013-09-17 Thread Peter Tarver
Zhang Guoqing - I'm not sure where to begin to respond to the below, so I'll limit my responses to the following. 1) §1.4.11 is in §1.4, General conditions for test, and presents an assumption about the nature of telecommunications networks in general. For the purposes of this standard, is not

Re: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

2013-09-16 Thread Peter Tarver
From: Zhangguoqing (A) Sent: Friday, September 13, 2013 17:57 If a transmit equipment can deliver 1.3A current into telecommunication network, then in the corresponding receive equipment (terminals), 1.3A current is available, do you think so? The 1.3 A limitation is under worst-case

Re: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

2013-09-13 Thread Peter Tarver
-Original Message- From: Zhangguoqing (A) [mailto:zhangguoq...@huawei.com] Sent: Wednesday, September 11, 2013 05:39 My question is , if a equipment intends to provide power over the telecommunication wiring system, the current and the power should be controlled at the same time?

Re: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

2013-09-11 Thread John Woodgate
In message 7d25799235e00f4c9b04eca410c1c5bf8f0ba...@szxema502-mbx.china.huawei.com , dated Wed, 11 Sep 2013, Zhangguoqing (A) zhangguoq...@huawei.com writes: 6.3 Protection of the telecommunication wiring system from overheating Equipment intended to provide power over the telecommunication

Re: [PSES] question on clause 6.3 and 1.4.11 of IEC60950-1

2013-09-11 Thread Zhangguoqing (A)
Thanks for John's reply The contents of clause 6.3 and 1.4.11 of IEC60950-1 are moved to IEC60368-1 1st edition 6.2.2.4 PS1 PS1 is a circuit where the power source, (see Figure 40) measured according to 6.2.2, does not exceed: �C 500 W measured during the first 3 s; and �C 15 W measured after