Technical Guide P92x/EN TD/E11
Technical Data
MiCOM P921-P922-P923 Page 25/30
No additional errors will be incurred for any of the following influencing quantities.
Environmental Operative range (typical only)
Temperature
-25°C to +55°C
Mechanical (Vibration, Shock, Bump,
Seismic)
According to :
IEC 60255-21-1:1988
IEC 60255-21-2:1988
IEC 60255-21-3:1995
Electrical Operative range
Frequency 40 Hz to 70 Hz
Harmonics (single) 5% over the range 2
nd
to 17
th
Auxiliary voltage range 0.8 LV to 1.2 HV (dc)
0.8 LV to 1.1 HV (ac)
Aux. supply ripple 12% Vn with a frequency of 2.f
n
Power off withstand
50 ms
9.4 High Voltage Withstand IEC60255-5:1977
9.4.1 Dielectric Withstand
2.0kVrms for one minute between all terminals and case earth.
2.0kVrms for one minute between all terminals of independent circuits,
including contact circuits.
1.5kVrms for one minute across dedicated normally open contacts of output relays.
1.0kVrms for 1 minute across normally open contacts of changeover pairs and
watchdog outputs.
9.4.2 Impulse
The product will withstand without damage impulses of 5kV peak, 1.2/50ms, 0.5J
across:
· Each independent circuit and the case with the terminals of each independent
circuit connected together.
· Independent circuits with the terminals of each independent circuit connected
together.
· Terminals of the same circuit except normally open metallic contacts.
9.4.3 Insulation Resistance
The insulation resistance is greater than 100 MW.
To Next Page
Loading...
