Kumwell KZ01.*.ds-3/0 are a lightning arresters class I according to IEC 61643-11. These are recommended for use in the Lighting Protection Zone Concept at the boundaries of LPZ 0-1 (according to IEC 62305)

KZ01.*.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.
These arresters are intended for use in TN-C power supply system.

Three-Phase for TN-C System
Technical Data		KZ01.UN230.ds-3/0		KZ01.UN400.ds-3/0
Nominal voltage	UN	230 V AC		400 V AC
Max. continuous operating voltage	UC	350 V AC		440 V AC
Lightning impulse current (10/350µs) [L-PEN]	Iimp		50 kA
Total lightning current	Itotal		150 kA
L1+L2+L3 ’PEN
Nominal discharge current (8/20µs) [L-PEN]	In		50 kA
Voltage protection level at In	UP	< 2 kV		< 2.5 kV
Temporary overvoltage (TOV)	UT		462 V/5 sec
Follow current  interrupting rating at UC [L-PEN]	Ifi		3 kArms
Response time	tA		< 100 ns
LPZ			0-1
Protection type			IP20
Operating temperature range			-40°C to + 80°C
Mounting on			Din rail 35 mm
Max. back-up fuse			500 A gL/gG