ANDOUK Electronics Co. Ltd Board - Notice & News
ID:     PW:   
Korean English
회사소개 제품안내 기술자료 게시판 판매대리점 사이트맵

Free Board
Home > Board > Notice & News    
Notice & News
  Meaning of Contact ratings in data sheets
2010-01-12 07:45:33, Inquire count : 8,796
Contact ratings mean pure resistive load (Power factor cos phi = 1) in Data sheets like cement or heat resisters.
These ratings generally show values of 100,000 oprations with the load, time 1 sec. on 2 sec. off or 1.5 sec. on and 1.5 sec. off.

So, considering relay's mechanical life expectancy is over 10,000,000 cycles, as per actual loaded, relay life expectancy is predicted accorded inverse proportion curve between mechanical life and elecrical life.

However, when load is inductive load, cos phi value is not "1", but such as 0.4 (General Motor) or 0.7 (Lamp),
10A 250VAC will be reduced to 4A (cos phi = 0.4) or 7A (cos phi = 0.7).

[ LIST ]

Namkwang Centlex Room 412, 440-4 Cheongcheon-dong, Bupyeong-gu, Incheon 403-858, Korea.    E-Mail :   TEL : 032-363-3800~4   FAX : 032-363-3805   Copyright 2009 @ HANDOUK Electronics Co. Ltd All Right Reserved.