Eltom - OWUS - DC indoor disconnector with earthing switch

Indoor disconnectors OWUS are the devices used for connecting, disconnecting and earthing the electric circuits without load. The devices are suitable for working in traction substations and in the industry. Mounted in the chamber, the disconnector fulfills various functions such as: isolating the positive and negative ends the assembly of transformer/rectifier, isolating the feeder from the power supply, coupling and disconnecting various of traction section. Thanks to its modular design OWUS disconnector provides many different combinations.

Disconnector is designed in two configurations:

OWUS 1-20 with one motor drive for disconnector and for earthing switch
OWUS 2-20 with two separated motor drives: one for disconnector and one for earthing switch

high resistance to short circuit
silver – plated contacts
self – cleaning contacts
motor or manual operating
compact construction
compliance with standards: PN-EN 50123-2:2013, PN-EN 50123-3:2003

	OWUS 1-20	OWUS 2-20
Thermal current in open air	up to 2000 A	up to 2000 A
Rated voltage	1000 VDC	1000 VDC
Rated insulation voltage	3000 VDC	3000 VDC
Short-circuit current 1 s. (disconnector)	50 kA	50 kA
Short-circuit current 1 s. (earthing switch)	30 kA	16 kA
Rated voltage of the motor	24 VDC, 230 V DC/AC	24 VDC, 230 V DC/AC
Rated power od the motor	90 W	90 W
Auxiliary contacts	3 x 4NO + 4NC	motor 2 x 4NO + 4NC
Working temperature	-25°C up to 45°C	-25°C up to 45°C
Min. mechanical durability	20000 cycles	20000 cycles
Closing/ opening	1-2 s.	0,5 s.