Page 605 - Wago_PCB_TerminalBlocksConnectors_Volume2_2015_US

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• Salt Spray Test per IEC/EN 60068-2-11; Marine Applications GL, LR, DNV

This test is similar to the test performed in water condensation alternating atmospheres, except that instead of industrial atmo-
spheres, salt mist conditions will be simulated in a heated test chamber (see picture).

Depending on the test procedure being used, the test specimen is sprayed with salt
mist for 16 hours up to 672 hours (4 weeks).
Salt spray tests are widely used, especially for ship approvals.
However, this test is performed differently than the test procedures described previ-
ously for general applications:
During a typical test, the test specimen is sprayed with a salt solution for two hours
and is then stored for seven days in an atmosphere with a relative humidity between
90 and 95 %.
This procedure is repeated four times.
Voltage drop measurements are used as an evaluation criterion.

• Quick Change of Temperature per IEC/EN 60068-2-14
Without air-conditioning, distribution panels and terminal boxes are exposed to seasonal (and ever-changing) temperature
extremes – especially on the open field side.
In process technology, for example, a terminal block is exposed to even quicker changes in temperature.

To simulate such conditions the test specimen is exposed to
t 1
T B > < ≤ 10 repeated temperature changes, for example,
between T -40 °C nd T +70 °C.
B
A
Temperature in the test chamber A <___ t 1 ___> t 2 <___ t 1 ___> t 2 Time t The dwell time t depends on the thermal capacity of the test
B
1
specimen and should be between maximum 3 h and minimum
10 min. and the transition time t 2 - 3 min., 20 – 30 s or less
2
The mechanical and electrical properties of the product are
T A t than 10 seconds.
1
> < ≤ 10
<__________ 1 cycle __________> checked at the end of the test.
A Beginning of first cycle
B End of first and beginning of second cycle

• Damp Heat, Cyclic (12 + 12 Hour Cycle) per IEC/EN 60068-2-30; Marine Applications GL, LR, DNV
This test determines the suitability of electrical equipment for use and storage under conditions of high relative humidity when combined
with cyclic temperature changes and, in general, producing condensation on the surface of the specimen.

In addition to the salt spray tests, the damp heat test is also
100 96 % used for ship approvals.
humidity (%) 90 95 % 90 % 80 % 95 % > < 15 min For this test the specimens are subjected to temperatures vary-
80
15 min
___>
rel. Functional test < Functional test ing cyclically between +25 °C (77°F) and +55 °C (131°F)
60 > 2h < + 57 °C > 2h < with a relative humidity of 95% (for tolerances see figure).
55
50 + 53 °C Functional tests are performed at defined times during the stor-
age period.
40
Functional test The mechanical and electrical properties of the product are
> 2h <
30 + 28 °C checked at the end of the test.
25 _> 3 h 13
>
20 <_________ _> _> 6 h > + 22 °C _> _> 3 h < 0,5 h
12 h
Temperature (°C) 10 Specimen connected and switched on Specimen connected and switched off
0,5 h
>
except for functional tests
1 cycle = 24 h
1 cycle = 24 h
6 12 18 24 30 36 42 48
Hours (h) _>