安规网

 找回密码
 注册安规
安规论坛 | 仪器设备 | 求职招聘 | 国家标准 公告 | 教程 | 家电 | 灯具 | 环保 | ITAV 签到 充值 在线 打卡 设备 好友| 帖子| 空间| 日志| 相册
IP淋雨机 | 证书查询 | 规范下载 | 资质查询 招聘 | 考试 | 线缆 | 玩具 | 标准 | 综 合 红包 邮箱 打卡 工资 禁言 分享| 记录| 道具| 勋章| 任务
水平垂直燃烧机 | 针焰 | 灼热丝 | 漏电起痕
IP防水防尘设备|拉力机|恒温恒湿|标准试验指
灯头量规|插头量规|静风烤箱|电池设备|球压
万年历 | 距元旦节还有
自2007年5月10日,安规网已运行
IP淋雨设备| 恒温恒湿箱| 拉力机| 医疗检测设备沙特Saber 埃及COI 中东GCC|CoC直接发证机构水平垂直燃烧机|灼热丝|针焰试验机|漏电起痕试验机
灯头量规|试验指|插头插座量规|灯具检测设备耐划痕试验机|可程式恒温恒湿试验箱 | 耦合器设备广东安规-原厂生产-满足标准-审核无忧
查看: 999|回复: 0

[POW] DSH 644 Simplified test procedure between different poles devices: 1P+N and 2P d

[复制链接]
发表于 2012-11-7 18:21 | 显示全部楼层 |阅读模式
广东安规检测
有限公司提供:
DSH 644" q2 B  C* [/ e4 z
# d( N9 \1 |; l+ Z7 M/ t
Simplified test procedure between different poles devices: 1P+N and 2P devices
1 I* u/ e) r5 C, X3 T' [  |7 h6 M. b
Table 10" t$ m- h& v1 O; {
60947-2(ed.3)
  V5 F2 T8 l/ {, m4 J. m
( \. j! z  _- D& V8 |
Standard:
8 F1 R/ P2 k  Y) CIEC 60947-2, 3rd edition, 2003
6 H3 N+ `0 h& ~Sub clause(s):2 Y+ o3 Z( i( [# ~
Table 101 [; Y% W  ^8 E2 _5 q4 v* j7 @% @
DSH:
0 J+ `1 F, z: T' Q6440 o( V2 ~1 ]1 F' W. m# t1 R( m
Subject:
6 |% z: H" ^* CSimplified test procedure between different poles devices: 1P+N and 2P devices
8 I+ g% ^5 s+ }. D: JKey words:% h& `( K: M; u& A3 h3 d% M/ q
Tests on 1P+N and 2P devices8 L) K& z8 S. M& J. l
Approved by the 45th CTL Plenary meeting 2008: f+ ~9 K1 O9 Z: a
Question:
( w2 r' z6 K6 O) U/ wConsidering a case where, within a series of circuit breakers, the two pole version and the 1P+N version have identical construction (neutral pole is a fully protected pole and is identical to a phase pole) and the two pole version and the 1pole+N version have the same voltage rating:
! _; |. A4 f- cIs it acceptable that the tests performed on the two pole version cover the 1P+N version?
( M* |% I  `- T6 c) J: v+ J3 f/ fRationale:1 R0 F* H1 y. Z& h! w( v/ g: }
􀂉 According to item 2.3.1 of IEC 60947-1 (2004-03), there is no difference between one pole plus neutral and two pole devices, provided that the neutral pole is technically identical to the phase poles.
1 W) V. j. P+ Q7 l7 u1 a- f2.3.1 pole of a switching device:
7 ]& _1 l, l/ L3 c2 ^" i2 Nportion of a switching device associated exclusively with one electrically separated conducting path of its main circuit and excluding those portions which provide a means for mounting and operating all poles together [441-15-01]3 d6 }/ R% y8 L7 w, n
NOTE A switching device is called single-pole if it has only one pole. If it has more than one pole, it may be called multi-pole (two-pole, three-pole, etc.) provided the poles are or can be coupled in such a manner as to operate together.* g* F* g4 _) _$ T7 t# M+ q
􀂉 In addition there are some specific requirements, related to markings as describe in item 7.1.8, which are fully satisfied by construction." I* h5 K, k" f" \/ `
7.1.8 Additional requirements for equipment provided with a neutral pole:& W3 O2 T6 y# P6 U- W) j" ^3 ?
􀂃 When an equipment is provided with a pole intended only for connecting the neutral, this pole shall be clearly identified to that effect by the letter N (see 7.1.7.4).- o; A, f( O) D: r
􀂃 A switched neutral pole shall break not before and shall make not after the other poles.! O/ `7 a8 b' m; g9 {6 c
􀂃 If a pole having an appropriate short-circuit breaking and making capacity (see 2.5.14 and 2.5.15) is used as a neutral pole, then all poles, including the neutral pole, may operate substantially together.1 M1 U" S3 R3 W( R2 s! R5 h( Q/ K, a
NOTE The neutral pole may be fitted with an over-current release.
) r3 I; ?: ?6 u, }For equipment having a value of conventional thermal current (free air or enclosed, see 4.3.2.1 and 4.3.2.2) not exceeding 63 A, this value shall be identical for all poles.1 Q! t' l8 x8 v6 L  [
􀂉 Concerning the test conditions, the test circuit used for 2 pole circuit breakers (2P or 1P+N) is given in figure 4 of the standard (see page 3).9 H+ U% Q: a/ X& z8 J! O
Based on note 2, the only difference between 2P and 1P+N is the way of connecting the safety area.0 N6 s! h" E2 ]% `! k# e* q& U
For 1P+N, it shall be connected to phase and for 2P it shall be connected to Neutral.
+ y2 C8 A& F7 O8 v1 \/ FFor breaking aspect, it was decided to perform the tests on 2 poles CB for voltages up to 440V covering the case of 1P+N at 240V.
  ?( H/ ?0 T& O* a8 ^3 @, \( ^3 s+ `For the clearance to safety area aspect, the voltage between one phase and safety area is maximum in case of 1P +N and equal to 240V maximum. Nevertheless this case is covered by the three phase test performed at 440V, considering that in such case the voltage between safety area and the first pole to clear can reach (1,5x 440V) / (1,732) = 380 V (which is much greater than the 240V of the 1P+N).
% Z( c9 m8 x& H/ z% f% j# p2 p; kTherefore, we can consider that the tests performed on 2P devices, cover 1P+N devices.

2 M# U7 P, w0 \3 jDecision:% z; P  l) H: j8 C+ w6 e1 _) _! T
Yes it is acceptable to cover the 1 P+N version by the tests performed on the two pole version.

5 O+ t7 A1 R& ]8 u
1 A# O% \4 S& q$ S4 |% A  E4 r; I7 r6 `1 c

本帖子中包含更多资源

您需要 登录 才可以下载或查看,没有账号?注册安规

x
您需要登录后才可以回帖 登录 | 注册安规

本版积分规则

关闭

安规网为您推荐上一条 /1 下一条

QQ|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网 ( 粤ICP13023453-10 )

GMT+8, 2024-12-24 04:08 , Processed in 0.068941 second(s), 22 queries .

Powered by Discuz! X3.4

© 2001-2023 Discuz! Team.

快速回复 返回顶部 返回列表