Standard No.:	JB/T 9574-2000
English Name:	Under-frequency relay and equipment
Chinese Name:	欠频率继电器及装置
Chinese Classification:	K45    Relay protection and automatic device
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	29.120.70 29.120.70    Relays 29.240.30    Control equipment for electric power systems 29.120.70
Source Content Issued by:	State Bureau of Machine Building Industry
Issued on:	2000-4-24
Implemented on:	2000-10-1
Status:	valid
Superseding:	ZB K 45026-1990 ZB K 45026-1990
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	120.0
Delivery:	via email in 1~3 business day

本标准规定了欠频率继电器及装置的产品分类、技术要求、检验方法、检验规则、标志及使用说明书、包装、贮存、运输以及其它要求。本标准适用于欠频率继电器及装置(以下简称产品)，此类产品用于电力系统电网稳定控制，当系统频率下降时，自动切除部分负荷或自动解列电网，保证电力系统安全可靠运行。
本标准仅适用于新的产品。