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JR20
JR20 series thermal relay

JR20 series thermal relay is suitable for the power system of AC 50/60Hz, 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 compensation, trip indication. It can manually and automatically get back. The product conforms to GB14048.4, IEC60947-4 stardands.


Main technical Specifications
Type Number 5WSetting Range(A) For Contactor

JR20-10L

 1R 0.1~0.15 CJ20
-10
2R 0.15~0.23
3R 0.23~0.35
4R 0.35~0.53
5R 0.53~0.8
6R 0.8~1.2
7R 1.2~1.8
8R 1.8~2.6
9R 2.6~3.8
10R 3.2~4.8
11R 4~6
12R 5~7
13R 6~8.4
14R 7~10
15R 8.6~11.6
JR20-16L 1S 3.6~5.4 CJ20
-10
-16
2S 5.4~8
3S 8~12
4S 10~14
5S 12~16
6S 14~18
JR20-25L 1T 7.8~11.6 CJ20
-16
-25
2T 11.6~17
3T 17~25
4T 21~29
JR20-63L 1U 16~24 CJ20
-40
-63
2U 24~36
3U 32~47
4U 40~55
5U 47~62
6U 55~71
JR20-160L 1W 33~47 CJ20
-100
-160
2W 47~63
3W 63~84
4W 74~98
5W 85~115
6W 100~130
7W 115~150
8W 130~170
9W 144~176
JR20-250L 1X 130~195 CJ20
-250
2X 167~250
JR20-400L 1Y 200~300 CJ20
-400
2Y 267~400
JR20-630L 1Z 320~480 CJ20
-630
2Z 420~630


Motion characteristic

MOTION CHARACTERISTIC:THREE-PHASE BALANCE MOTION TIME
No Times the setting current Motion time Start conidition Ambient temperature
1 1.05 >2h cold state 20±5℃
2 1.2 <2h heat state
(Following the No.1 test)
3 1.5 <4min
4 7.2 10A 2s<Tp≤10s ≤63A cold state
10 4s<Tp≤10s >63A
PHASE-LOSING MOTION CHARACTERISTIC
No Times the setting current Motion time Start condition Ambient temperature
Any two phase Another phase
1 1.0 0.9 >2h cold state 20±5℃
2 1.15 0 <2h heat state
(Following the No.1 test)