P92x/EN TD/E11 Technical Guide
Technical Data
Page 26/30 MiCOM P921-P922-P923
10. ENVIRONMENTAL COMPLIANCE
The product complies with the following specifications :
10.1 Electrical environment
10.1.1 DC Supply Interruptions IEC60255-11:1979
The product will withstand a 20ms interruption in the auxiliary voltage in its quiescent
condition.
10.1.2 AC Ripple on DC Supply IEC60255-11:1979
The product will operate with 12% AC ripple on the DC auxiliary supply without any
additional measurement errors.
10.1.3 Disturbances on AC Supply - EN61000 - 4 - 11 :1994
The products satisfies the requirements of EN61000 - 4 - 11 for voltage dips and
short interruptions.
10.1.4 High Frequency Disturbance IEC60255-22-1:1988
The product complies with Class III 2.5kV common mode and 1kV differential mode
for 2 seconds at 1MHz with 200W source impedance, without any mal-operations or
additional measurement errors.
10.1.5 Fast Transient IEC60255-22-4:1992 & IEC60801-4:1988
The product complies with all classes up to and including class IV/ Level 4 4kV
without any mal-operations or additional measurement errors.
Fast transient disturbances on power
supply (common mode only)
4kV, 5ns rise time, 50ns decay time, 5kHz
repetition time, 15ms burst, repeated every
300ms for 1min in each polarity, with a 50W
source impedance.
Fast transient disturbances on I/O
signal, data and control lines
(common mode only)
2kV, 5ns rise time, 50ns decay time, 5kHz
repetition time, 15ms burst, repeated every
300ms for 1min in each polarity, with a 50W
source impedance.
10.1.6 Electrostatic Discharge IEC60255-22-2:1989 & IEC60801-2:1991
The product will withstand application of all discharge levels up to the following
without mal-operation:
Class IV– 15kV discharge in air to the user interface, display and exposed metal
work.
Class III– 8kV discharge in air to all communication ports.
Level 3–6kV point contact discharge to any part of the front of the product.
without any mal-operations.
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