Kumwell Combi set is lightning and surge arrester class l+ll according to IEC 61643-11-These are recommended for use in the Lightning Protection Zones Concept at the boundaries of LPZ 0-2 (according to IEC 62305) for lightning current equipotential bonding and elimination of switching surges that originate in power supply systems enterring the building.

Kumwell Combi set is a combination of the lastest technologies where the spark gap combines the varistor. The set contains lightning arresters of KZ01 series and surge arresters of KZ12 series. KZ0112 can be installed in every common switchboard and its special construction is intended for using in non-measurable parts of electrical Systems. KZ0112.UN230.ds-3/0 can be used in industrial installations such as substations, main switchboards of large industrial structures and also places with high risk of a direct lighting strikes occurance. This device is intended for use in TNC power supply system.

3+0 Coordinated lightning and surge arrester
Technical Data		KZ0112.UN230.ds-3/0
Nominal voltage	UN	230 V AC
Max. continuous operating voltage	UC	350 V AC
Total lightning impulse current (10/350µs)	Iimp	120 kA
Nominal discharge current (8/20µs)	In	20 kA
Voltage protection level	UP	< 1.3 kV
Follow current  interrupting rating at UC	Ifi	3 kArms
Short-circuit withstand capability	Ip	50 kArms
Response time	tA	< 25 ns
Temporary overvoltage (TOV) (L-N)	UT	462 V/5 sec
Max. back-up fuse		315 A gL/gG
Recommended cable cross-section		25 mm2 (solid)
of the connected conductors		16 mm2 (flexible)
LPZ		0-2
Protection type		IP20
Operating temperature range		-40°C to + 80°C
Mounting on		Din rail 35 mm
Type of remote signalling		Changeover contract