JR20系列熱繼電路適用于交流50HZ,主電路額定電壓至660V,電流至630A的電力系統(tǒng)中作為三相交流電動機(jī)的過載和斷相保護(hù),具有斷相保護(hù),溫度補(bǔ)償,脫扣指示功能,能自動與手動復(fù)位,并與CJ20系列交流接觸器配合使用,組成電磁起動器。
JR20 series thermal relay is suitable for the power system of AC 50HZ,main circuit rated voltage up
to 660V,current up to 630A,used as protecting AC three-phase motor against overload and phase
losing,and forming electromagnetic with starter CJ20 series AC contactor.It has functions of phase-
losing protection temperature campe,trip indication.It can passively and automatically get back.
二、型號及含義 TYPES AND MEANING

三、動作特性:三相負(fù)載平衡時的動作時間 MOTION CHJARCTERISTIC:THREE-PHASE BALANCE MOTION TIME
序號 No | 整定電流倍數(shù) Set current cinles | 動作時間 Motion time | 起始條件 Start conidition | 環(huán)境溫度 Temperature | ||
1 | 1.05 | >2h | 冷態(tài) Cold state | 20±5℃ | ||
2 | 1.2 | >2h | 熱態(tài) Heat state (接序號1試驗后) Following the test | |||
3 | 1.5 | <4min | ||||
4 | 7.2 | 10A | 2S | ≤63A | 冷態(tài) Cold state | |
10A | 4S | >63A |
四、斷相動作性能 PHASE-LOSING MOTION CHARACTERISTIC
序號 No | 整定電流倍數(shù) Set current cinles | 動作時間 Motion time | 起始條件 Start conidition | 環(huán)境溫度 Temperature | |||
任意二相 Arbitrary two phase | 第三相 Three phase | ||||||
1 | 1.0 | 0.9 | 冷態(tài) Cold state | 20±5℃ | |||
2 | 1.15 | 0 | 熱態(tài) Heat state (接序號1試驗后) Following the test |
五、規(guī)格 SPECIFICATIONS
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六、外形及安裝尺寸 OUTLINE AND MOUNTING DIMENSIONS




JR20-10L 16L 25L JR20-63L


JR20-160L JR20-250L 400L 630L