Siemens Argus 7SR21 - 74 TCS Trip Circuit Supervision; Operate and Reset Time; Reference

7SR21 & 7SR22 Performance Specification
Unrestricted © 2013 Siemens Protection Devices Limited Page 61 of 68
3.5 74TCS Trip Circuit Supervision
3.5.1 Reference
Parameter Value
t
d
Delay setting 0, 0.02…60 s
3.5.2 Operate and Reset Time
Attribute Value
t
basic
Element basic operate time
25 ms ± 20 ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10 ms
Repeatability
± 1 % or ± 10 ms
Variation
- 10 °C to + 55 °C
£ 5 %
f
nom
- 3 Hz to f
nom
+ 2 Hz
£ 5 %