Low Voltage Products - VAE ProSys sro

Manual transfer switches, closed transition
Technical data
Data according to UL508 (Recognized)
Switch size OESC 250K_ 500K_ 250K04N2 400K04N2
General use
Voltage V 480 480 480 480
Current A 250 500 250 1) 400 2)
Short circuit current r.m.s kA 50 50 50 50
Data according to IEC 60947-3
Rated insulation voltage Pollution degr. 3 V 1 000 1 000 1000 1000
Dielectric strength 50 Hz 1min. kV 8 8 8 8
Rated impulse withstand voltage kV 12 12 12 12
Rated thermal current in ambient 40 °C In open air A 250 500 250 400
...with minimum cable cross section Cu mm 2 120 2x 120 120 240
Rated operational voltage AC-20 and DC-20 V 1 000 1 000 1000 1000
Rated operational current, AC-21A 500 V A 250 500 250 1) 400 2)
Rated operational current, AC-22A 500 V A 250 500 250 1) 400 2)
Rated conditional short-circuit current I p
(r.m.s.) I p
: 50 kA/ ≤ 500 V kA 42 42 42 42
and corresponding max. allowed cut-off
current î c
, peak value.
Mechanical endurance Number of operating cycles 3) Cycles 8 000 8 000 8 000 8 000
Mechanical endurance / switch Number of operations Oper. 16 000 16 000 16 000 16 000
Terminal bolt size Diameter x length mm M10x40 M10x40 M10x40 M10x40
Terminal tightening torque Counter torque required Nm 30...44 30...44 30...44 30...44
Operating torque 3-pole switches Nm 30 30
1)
Powerpoles 250 A; Neutral 400 A, with minimum cable cross section 240 mm 2 .
2)
Powerpoles 400 A; Neutral 630 A, with minimum cable cross section 2 x 185 mm 2 .
3)
Operating cycle: O - I - O - II - O
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