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3UA Thermal Relay


Product Instruction:

3UA thermal relay is suitable forAC.50Hz Or 60Hz voltage upto 660-1000V, current up to 630A, General AC motor of long ordisconsinuous long operation. usedas overload protection.temperature compe. And triindication it can automati cally andpassivelygethack it canbe fixed with contactor to gether, also belindependtly fixed.

Phase Failure Acution Property

No. Set Current Times Intial Condition Ambient Temperature Ambient Temperature
1 Random two phases 3 Phase >2h Cold State ±20  ±5℃
1.0 0.90
2 1.15 0 <2h Thermal State(after No.1)

Tripping Property
3UA Thermal Relay - Thermal Overload Relay 
Action Property
Acction time when three phase balanced
No. Set Current Times Action Time Intial Condition Ambient Temperature
1 1.05 >2h Cold State Start 20±5℃
2 1.2 <2h Thermal State(After No1)
3 1.5 10A <2min ≤32
10 <4min >32
4 7.2 10A 2s<Tp≤10s ≤32 Cold State
10 4s<Tp≤10s >32

3UA-12.5 Thermal Relay - Thermal Overload Relay
3UA-12.5 Thermal Relay
3UA-12.5 Thermal Relay - Thermal Overload Relay

Set Current Range
0.1~0.16 1.6~2.5
0.16~0.25 2~3.2
0.25~0.4 2.5~4
0.32~0.5 3.2~5
0.4~0.63 4~3.6
0.63~1 5~8
0.8~1.25 6.3~10
1~1.6 8~12.5
1.25~2 10~14.5

3UA-25 Thermal Relay - Thermal Overload Relay
3UA-25 Thermal Relay
3UA-25 Thermal Relay - Thermal Overload Relay

Set Current Range
0.1~0.16 2.5~4
0.16~0.25 3.2~5
0.25~0.4 4~6.3
0.4~0.63 5~8
0.63~1 6.3~10
0.8~1.25 8~12.5
1~1.6 10~16
1.25~2 12.5~20
1.6~2.5 16~25
2~3.2 -

3UA-32 Thermal Relay - Thermal Overload Relay
3UA-32 Thermal Relay
3UA-32 Thermal Relay - Thermal Overload Relay

Set Current Range
0.1~0.16 2.5~4
0.16~0.25 3.2~5
0.25~0.4 4~6.3
0.4~0.63 6.3~10
0.63~1 8~12.5
0.8~1.25 10~16
1~1.6 12.5~20
1.25~2 16~25
1.6~2.5 20~32
2~3.2 25~36

3UA-45 Thermal Relay - Thermal Overload Relay
3UA-45 Thermal Relay
3UA-45 Thermal Relay - Thermal Overload Relay

Set Current Range
0.1~0.16 4~6.3
0.16~0.25 6.3~10
0.25~0.4 8~12.5
0.4~0.63 10~16
0.63~1 12.5~20
0.8~1.25 16~25
1~1.6 20~32
1.25~2 25~36
1.6~2.5 32~40
2~3.2 36~45
2.5~4 32~50
3.2~5 -

3UA-63 Thermal Relay - Thermal Overload Relay
3UA-63 Thermal Relay
3UA-63 Thermal Relay - Thermal Overload Relay

Set Current Range
0.1~0.16 4~6.3
0.16~0.25 5~8
0.25~0.4 6.3~10
0.4~0.63 8~12.5
0.63~1 10~16
0.8~1.25 12.5~20
1~1.6 16~25
1.25~2 20~32
1.6~2.5 25~40
2~3.2 32~45
2.5~4 40~57
3.2~5 50~63

3UA-80 Thermal Relay - Thermal Overload Relay
3UA-80 Thermal Relay
3UA-80 Thermal Relay - Thermal Overload Relay

Set Current Range
4.6~6.3
11~17
16~25
20~32
25~40
32~50
40~57
50~63
57~70
63~80
70~88

3UA-180 Thermal Relay - Thermal Overload Relay
3UA-180 Thermal Relay
3UA-180 Thermal Relay - Thermal Overload Relay

Set Current Range
55~80
63~90
80~110
90~120
110~135
120~150
135~160
150~180

3UA-400 3UA-630 Thermal Relay - Thermal Overload Relay
3UA-400 3UA-630 Thermal Relay
3UA-400 3UA-630 Thermal Relay - Thermal Overload Relay

Set Current Range
80~125
125~200
180~250
200~320
250~400
-
320~500
400~630

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