Low Voltage 【Back】
 

 

 

 
 
　
Home  >> Products >> Low Voltage >> Magnetic Starter & Thermal Relay >> LR7 Series Thermal Relay
 

 

 

 

 

  
1. Application
 
LR7 thermal relay is suitable for overload protection of AC motor operated on 8-hours duty oruninterupted duty. The overload protected AC motor with frequency 50Hz, voltage up to 660V,current up to 38A. Several functions provided by these relays are: phase-failure protection,temperature compensation. The product conforms to IEC60947-4-1 stardand.
 
 
2. Motion Characteristic: Three-phase Balance Motion Time
 
No Times of the setting current Motion time Start condition Ambient temperature
1 1.05 >2h Cold state 20±5oC
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
 
 
3. Specification
 
Type Setting range (A)
LR7-20
 0.6~1.11
1.11~1.66
2.5~3.7
1.62~2.5
3.7~5.6
5.6~8.4
8.4~11.9
11.9~16
16~23
23~27
27~33
33~38

 

 
  【Back】

Copyright ©. Sunfad Electrical Group Co., Ltd. All Rights Reserved