IEC 61557-7 Ed. 3.1:2023 (b)
1000 V a.c.及び1500 V d.c.以下の低電圧配電システムの電気的安全性－保護措置試験，計測又は監視用機器－第7部：位相シーケンス
Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence
発行年月日：
2023-08-25
状態：
有効
邦訳版：
無
英語 75ページ
25,740 円（税込） 本体価格：23,400円
| 規格概要 | IEC 61557-7:2019+AMD1:2023 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other quantities. It does not apply to monitoring relays. IEC 61557-7:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following changes with respect to the previous edition: a) alignment of the structure with that of the whole IEC 61557 series; b) updated requirements in 4.3 in accordance with new editions of IEC 61010-1 and IEC 61010-031; c) the information on markings was extended; d) the information on the operating instructions was extended; e) complement to the information on the testing of leads; f) test leads for insulated conductors were introduced; g) Annex B was added with information on phase sequence tests and indications. |
|---|---|
| TC |
TC 85 |
| ICS |
29.240.01 |
| 備考 |
