Technical data

18 Theoretical and general applications www.westermo.com
Criteria, a classification of performance
Criteria A: Normal performance within specified limits
(as defined in test specification).
Criteria B: Temporary loss of function or degradation of per-
formance which ceases after the disturbance ceas-
es, and from which the equipment under test
recovers its normal performance, without operator
intervention.
Criteria C: Temporary loss of function or degradation of per-
formance, the correction of which requires opera-
tor intervention.
EMC severity levels in
different environments
Residential
Residential, commercial and light-industrial environments.
Industrial
Immunity for industrial environments.
Railway
Railway applications – Signalling and telecommunications
apparatus.
Substation
Communication networks and systems in electrical sub-
stations.
Westermo
A combination of residential, industrial, railway, added
with experiences from installed Westermo products.
Test Port Westermo
Level Criteria
Emission
Radiated Enclosure 30/37 Class
dB (µV/m) B
Conducted AC Power 66-56/56/60 Class
Qp dB (µV) B
DC Power 66-56/56/60 Class
Qp dB (µV) B
Immunity
ESD Encl. contact ± 6 kV B
Encl. air ± 8 kV B
Enclosure 20 V/m A
1 kHz
80% AM
20 V/m A
200 Hz
pulse
Signal ± 2.0 kV A
AC Power ± 2.0 kV A
DC Power ± 2.0 kV A
Surge Signal L-E ± 2.0 kV B
Signal L-L ± 2.0 kV B
AC Pow. L-E ± 2.0 kV B
AC Pow. L-L ± 2.0 kV B
DC Pow L-E ± 2.0 kV B
DC Pow L-L ± 2.0 kV B
Signal 10 V A
1 kHz
80%AM
Power 10 V A
1 kHz
80%AM
Power Enclosure 100 A/m A
magnetic field 50 Hz
Pulse Enclosure 300 A/m –
magnetic field 6.4/16 µs
AC power* Power 30% 10/500 ms B
60% 100/1000 ms B
Interrupt 10/5 ms B
DC power Power 30% 10 ms B
60% 10 ms
Interrupt 10/100 ms B
20% above/below
rated voltage
Oscillatory Signal L-E – –
waves Signal L-L – –
Power L-E – –
Power L-L – –
50 Hz dis- Signal L-E 10/100 V A
turbances** Signal L-L 250 V A
* Voltage dips, short interruptions and voltage variations.
** Conducted common and differential mode.
Electrical
Fast
Transient
Radiated
field
immunity
Conducted
radio-
frequency
field
B A C K