Areva MiCOM P921 - Page 74

P92x/EN TD/E11 Technical Guide
Technical Data
Page 28/30 MiCOM P921-P922-P923
10.1.13 Power Frequency Interference - Electricity Association (UK)
EA PAP Document, Environmental Test Requirements for Protection Relays and
Systems Issue I, Draft 4.2.1 1995.
Class Length of comms
circuit
Unbalanced
Comms V rms
Balanced Comms
(Unbalance 1%)
Vrms
Balanced Comms
(Unbalance 0.1%)
Vrms
1 1 to 10 metres 0.5 0.005 0.0005
2 10 to 100 metres 5 0.05 0.005
3 100 to 1000 metres 50 0.5 0.05
4 1000 to 10,000m or > 500 5 0.5
10.2 Atmospheric Environment
10.2.1 Temperature IEC60068-2-1:1990/IEC60068-2-2:1974
Storage and transit –40°C to +70°C.
Operating –25°C to +55°C.
10.2.2 Humidity IEC60068-2-3:1969
56 days at 93% relative humidity and 40°C.
10.2.3 Enclosure Protection IEC60529:1989
IP52 - Protected against dust and dripping water .
10.3 Mechanical Environment
10.3.1 Vibration IEC60255-21-1:1988
Vibration Response Class 2 - 1g
Vibration Endurance Class 2 - 2g.
10.3.2 Shock and Bump IEC60255-21-2:1988
Shock response Class 2 - 10g
Shock withstand Class 1 - 15g
Bump Class 1 - 10g
10.3.3 Seismic IEC60255-21-3:1993
Class 2.