Description Type test value Reference
Damped oscillatory magnetic
field immunity test
• 2 s
• 1 MHz
100 A/m
400 transients/s
IEC 61000-4-10
Voltage dips and short inter-
ruptions
0%/50 ms Criterion A
40%/200 ms Criterion C
70%/500 ms Criterion C
0%/5000 ms Criterion C
IEC 61000-4-11
IEC 61000-4-29
IEC 60255-26
Power frequency immunity
test
• Common mode
• Differential mode
Binary inputs only 300 V rms
150 V rms
IEC 61000-4-16
IEC 60255-26, class A
Emission tests
• Conducted
0.15. 0.50 MHz
0.5...30 MHz
• Radiated
30...230 MHz
230...1000 MHz
1…3 GHz
3…6 GHz
<79 dB (µV) quasi peak
<66 dB (µV) average
<73 dB (µV) quasi peak
<60 dB (µV) average
<40 dB (µV/m) quasi peak,
measured at 10 m distance
<47 dB (µV/m) quasi peak,
measured at 10 m distance
<76 dB (µV/m) peak
<56 dB (µV/m) average,
measured at 3 m distance
<80 dB (µV/m) peak
<60 dB (µV/m) average,
measured at 3 m distance
EN 55011, class A
IEC 60255-26
CISPR 11
CISPR 12
Table 1688: Safety-related tests
Description Type test value Reference
Overvoltage category III IEC 60255-27
Pollution degree 2 IEC 60255-27
Insulation class Class I IEC 60255-27
Dielectric tests
500 V, 50 Hz, 1 min, RS-485
and IRIG-B
1 kV, 50 Hz, 1 min, across
open contacts
1.5 kV, 50 Hz, 1 min, Ethernet
RJ-45
IEC 60255-27
Table continues on the next page
Protection relay and functionality tests 1MRS759142 F
1950 REX640
Technical Manual
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