控制按钮开关
十字开关&行程开关
组合指示灯
韩国龙声电机株式会社主要生产(YONGSUNG牌)转换开关，带灯/带钥匙/小型凸轮开关，韩国龙声(YONGSUNG)连锁继电器，φ16系列、φ22系列 按钮，韩国龙声(YONGSUNG)急停按钮开关，带灯急停，带灯按钮开关，指示灯，旋转开关，急停开关（按钮/带灯型），十字开关，辅助开关，脚踏开关，拨位开关，组合光字牌，方型LED指示灯，小型/控制/大容量中间继电器，双位置/闪光/小型/时间继电器，OR-4断电延时继电器，插座，水位自动调节开关，短路回路用/固定式/组合式端子排，控制盒，四角多极连结器，保险丝座，蜂鸣器，组合光字牌及报警装置，AC，DC电压表/电流表，交流/直流用微动开关，行程开关，小型微动开关，接近开关等
产品目录
水位开关&计时器
中间继电器
转换开关
关于韩国龙声电机株式会社(yongsung electronic co.,LTD)
取得的规格认证（certificate）
1980 Established yongsung electric(482-58, Tasari-dong, Dongdaemun-gu, Seoul, Korea)
1986 Obtained Korean Electrical Product Manufacturing License
1988 Recognition of Korean electrical products
1989 Obtained Korean Industrial Specifications
1992 Obtained Korea's measuring instrument manufacturing license (Gyeonggi-do)
1993 Passed nuclear power level test (F & H USA)
1996 Designated as a Korean SME and Quality Standard Certification (Gyeonggi-do)
1997 Obtained "ISO9002" certificate (Korea Electrical and Electronic Test Research Institute)
1998 Certified for Nuclear Energy Rating (Level-1E)-Shinhan Certified as a Promising Small and Medium Enterprise (Korea Electric Power Company)
1999 Designated as Korea's technologically competitive company (Small and Medium Business Administration)
Registered as a supplier of Korean nuclear power plant components (level-1E)-KORI nuclear power plant
Obtained UL certification (USA, Canada)-Relay
Obtained "ISO9001 Certification (RAB)"-HSB-RS Korea
Obtained KEPIC Nuclear Energy Performance Quality Certificate--Korean Electric Power Association
Obtained UL certification (USA, Canada)-micro switch
2000 Designated as a promising power venture company (Korean Power Corporation)
2003 Obtained CCC certification (China Compulsory Certification)-relay, transfer switch and Ø22 series
2004 Obtained UL certification—indicators, changeover switches, control switches (USA, Canada)
Won the Korea Electrical Culture Award (Minister of Science and Technology)
2005 Electrical Product Certification (Industrial Technology Testing Institute)
Registered as a supplier company of Korea Hydro Atomic Power Co., Ltd. (quality level: Q)
Obtained CE certification (indicators, transfer switches, control switches)
Obtained CE certificate (cross switch)
2006 Won the Management Innovation Award
Obtained CCC certification (China Compulsory Certification) (travel switch, Ø16 series, square light, rectangular light)
Obtained UL certification-AP12, AP13, AR2, AR3, AK2, AK3 switches
Obtained CE certification-AP12, AP13, AR2, AR3, AK3 switches
2007 Acquired UL certification-P222, push button switch or indicator
CE certified P222, pushbutton switch or indicator
2008 Product Certification
Headquarters and factory moved to 348-3, Samsil-eup, Secun-eup, Guangzhou, Gyeonggi
2010 Korea Longsheng Electric Co., Ltd. was registered as a supplier of Westinghouse Electric
2011 Awarded the Golden Tower Industrial Medal
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