7SR45 Performance Specification
© 2017 Siemens Protection Devices Limited Chapter 3 Page 7 of 10
Type Test Reference Requirement
Thermal Withstand
Continuous
IEC 60255-27
IEC 60255-1
1s:
2 x In
50 A (1 A) 150 A (5 A)
Burden:
≤ 3.0 VA per phase and ≤ 0.2 VA earth for 1 A
≤ 3.5 VA per phase and ≤ 0.2 VA earth for 5 A
Functional IEC 60255-3 for both 1 A and 5 A CTs
Maximum Allowable
Temperature
IEC 60255-6 Max. temperature limit +100°C
NOTE:
#
All aspect of IEC 60255-5 have been covered under IEC 60255-27.
* Pulse output X3 is excluded between any terminals and earth.
Table 1-13 Climatic/Environmental Tests
Type Test Reference Requirement
Ambient Operating
Temperature
IEC 60068-2-1,
IEC 60068-2-2
-10
C to + 60
C
Permissible
Temporary Operating
Temperature,
(Tested for 16 h)
IEC 60068-2-1,
IEC 60068-2-2
-40
C to + 70
C
Permissible
Temporary Operating
Temperature,
(Tested for 96 h)
IEC 60068-2-1,
IEC 60068-2-2
-20
C to + 70
C
Cold test - Operational
test
Cold test - Non-
operational storage
test
IEC 60068-2-1 -10
C, 96 h
-25°C, 16 h
Dry heat test
Operational
Dry heat test Non-
Operational, Storage
IEC 60068-2-2 +60
C, 96 h
+70°C, 16 h
Damp heat test,
Steady State
IEC 60068-2-78 4 days at 95% RH, +40
C
Damp heat test, cyclic IEC 60068-2-30 (+25
55
C, R.H. > 93%) 6 cycles
NOTE:
Cold test at -40°C:
The device was kept in non-energized condition at -40° C for 16 hours. Energized at the end of 16 hours
(@ -40°C ) and accuracy test was performed and found to be within limits. The LCD was blank at -40°C.
After accuracy test at -40° C, temperature was ramped up to room temperature and accuracy was found
within limits, the LCD resumes to the normal condition.
To Next Page
Loading...
Need help?
General