Siemens 7SR45 Argus User Manual page 72

Type Test Reference
Single Fault Condition IEC/EN 60255-27: Edition 2:
2013-10
Trip Response at different fault currents
Influence on Accuracy
Trip response at recurring faults
Test Conditions
Test Result
©2018 Siemens Protection Devices Limited
Table 1-17 Real Time Digital Simulation Test (RTDS)
Fault current: 1.1, 2, 3, 5, 10 times of set value
Influence of DC components
DC content at first peak : 100 %
Decay time: 25 ms, 50 ms, 100 ms
Immunity to inrush current
2
Relay behaviour at primary CT saturation
Fault currents: 10 A, 20 A, 40 A
Fault current: 2 times and 5 times of set value.
Delay between recurring faults: 300 ms, 1 s, 2 s
Table 1-18
Simulated Inrush current with 15 % 2
content
The immunity against inrush currents is up to 3 times
of the peak value with 95 % fundamental current (I
Chapter 3 - 7SR45 Performance Specification
Parameters
Assessment of:
• Insulation between
circuits and parts
• Compliance with
requirements for
protection against the
spread of fire
• Overloads
• Intermittently rated
resistors
• Compliance with
requirements for
mechanical protection
nd
harmonic content: up to 28 %
Inrush Response Test
Values
The equipment shall
not present a risk of
electric shock or fire
after a single-fault
test.
nd
harmonic
).
set
Chapter 3 Page 12 of 14