MV design guide - Schneider Electric
MV design guide - Schneider Electric
MV design guide - Schneider Electric
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Switchgear<br />
definition<br />
Medium voltage circuit breaker<br />
c Humidity<br />
Average relative humidity<br />
Indoor equipment<br />
for a period<br />
24 hours 95%<br />
1 month 90%<br />
c Altitude<br />
The altitude must not exceed 1 000 metres.<br />
<strong>Electric</strong>al endurance<br />
The electrical endurance requested by the recommendation is three<br />
breaking operations at Isc.<br />
Merlin Gerin circuit breakers are capable of breaking Isc at least 15 times.<br />
Mechanical endurance<br />
The mechanical endurance requested by the recommendation is 2 000<br />
switching operations.<br />
Merlin Gerin circuit breakers guarantee 10 000 switching operations.<br />
Co-ordination of rated values (cf. § IEC 60 056)<br />
Rated Rated short-circuit Rated current in continuous service<br />
voltage breaking current<br />
Ur (kV) Isc (kV) Ir (A)<br />
3.6 10 400<br />
16 630 1250<br />
25 1250 1600 2500<br />
40 1250 1600 2500 3150<br />
7.2 8 400<br />
12.5 400 630 1250<br />
16 630 1250 1600<br />
25 630 1250 1600 2500<br />
40 1250 1600 2500 3150<br />
12 8 400<br />
12.5 400 630 1250<br />
16 630 1250 1600<br />
25 630 1250 1600 2500<br />
40 1250 1600 2500 3150<br />
50 1250 1600 2500 3150<br />
17.5 8 400 630 1250<br />
12.5 630 1250<br />
16 630 1250<br />
25 1250<br />
40 1250 1600 2500 3150<br />
24 8 400 630 1250<br />
12.5 630 1250<br />
16 630 1250<br />
25 1250 1600 2500<br />
40 1250 1600 2500 3150<br />
36 8 630<br />
12.5 630 1250<br />
16 630 1250 1600<br />
25 1250 1600 2500<br />
40 1250 1600 2500 3150<br />
<strong>Schneider</strong> <strong>Electric</strong><br />
Merlin Gerin <strong>MV</strong> <strong>design</strong> <strong>guide</strong><br />
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