Page 591 - Wago_PCB_TerminalBlocksConnectors_Volume2_2015_US

13

589
• Shock Test per IEC/EN 60068-2-27; Railway Applications IEC/EN 61373

The shock test is similar to the vibration test except that, instead of continuous vibrations, single shocks are applied to the speci-
men. Shock tests are usually performed with an acceleration of 15 g, for example, over a period of 11 ms. Tests for special
requirements often call for much higher values. Like the vibration tests, shock tests are primarily used to test the voltage drop vari-
ation or contact breaks, etc.

Example: Schock requirement
per IEC/EN 60068-2-27 (half-sine shock)
30 g acceleration, 6 ms duration
Shock direction: 3 axes (3 shocks in positive direction and 3 shocks in negative direction)

Time-Dependent Course of the Shock / 30 g, 6 ms, Negative Time-Dependent Course of the Shock / 30 g, 6 ms, Positive
Direction Direction
a[m/s 2 ] a[m/s 2 ]
67.5 450
50
400
0
350
-50
300
-100
250
-150
200
-200
150
-250
100
-300
50
-350
0
-400
-50
-450 t[ms] -67.5 t[ms]
0.45 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 0.45 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85
Status : Stop Status : Stop
Cause : Number of shocks ready! Cause : Number of shocks ready!
Date : 30.04.2009 Control : active Date : 30.04.2009 Control : active
Time : 07:27:59 Total number of shocks : 3 Time : 07:26:38 Total number of shocks : 3
Modulation : 42.0 % Shocks processed : 3 Modulation : 43.1 % Shocks processed : 3
Warning limits : inactive Top acceleration : 306.71 m/s 2 Warning limits : inactive Top acceleration : 305.74 m/s 2
Turn-off limits : inactive Speed : 1.13 m/s Turn-off limits : inactive Speed : 1.13 m/s
Legend: Legend:
Upper warning limits Lower warning limits Upper turn-off limits Lower turn-off limits Set acceleration curve Upper warning limits Lower warning limits Upper turn-off limits Lower turn-off limits Set acceleration curve
Actual acc. curve Measurement acceleration curve Actual acc. curve Measurement acceleration curve
RMS - SWR 900 - Testmanager Test file: 68-2-27.SHO (Shock) RMS - SWR 900 - Testmanager Test file: 68-2-27.SHO (Shock)

13