znr a arrester blocks type: s znr arrester block is mounted in the lightning arresters or the lightning protection devices in high voltage power distribution and protects the power distribution apparatus from lightning or switching surges. znr arrester block is a high voltage block improved in its material and manufacturing process to secure the long term stability. n features l no series gap is required because of the excellent voltage-current characteristics l low clamping voltage and excellent protection level l fast response to the fast steep transient voltage l no follow current l large withstanding surge current capability n explanation of part numbers znr a arrester blocks (type s) e r zk s n recommended application l lightning arrester l lightning arrester in power apparatus (transformers, primary cutout switches, insulators, disconnectors, switches) l simplified lightning arrester note: contact our sales office or factory for precautions for handling of the type s n application notes (type s) 1) znr arrester blocks shall be kept in dry air after the package open. 2) znr arrester blocks shall be handled with care because mechanical shock such as dropping or crashing each other may cause chipping or cracking. 3) sweat on the side surface of znr arrester block degrades its characteristic, and therefore handling with bare hand shall not be allowed. 4) electrical contact to znr arrester block shall be done by pressing the external metal electrode. 5) znr arrester block shall be kept dry in the lightning arrester or device housing. 6) if you have any questions on its application, please contact and ask our office.
series b, type s n ratings and characteristics l operating temperature range: e25 to 70 ?c l storage temperature range: e25 to 100 ?c l temperature coefficient of varistor voltage: 0 to e0.05 %/?c maximum peak current standard test ] applied voltage ratio = mcov ? 2 100(%) v 1ma mcov: maximum continuous operating voltage (rms) l varistor voltage other than 6 kv is available. block configuration other than culumn is available on request. n dimensions in mm (not to scale) part no. d t erzb28sk602 291 311 erzb32sk602 331 311 ERZB40SK602 401 311 znr a arrester blocks (type s) maximum peak current special test (4/10 s) erzb28sk602 erzb32sk602 ERZB40SK602 characteristics application class 2.5 ka lightning arrester class 2.5 ka lightning arrester class 5 ka lightning arrester ac 3 kv ac 3 kv ac 3 kv maximum continuous operating voltage 80 % 80 % 80 % applied voltage ratio ] 6 kv10 % 6 kv10 % 6 kv10 % varistor voltage v 1ma (dc) v 2.5 ka : 12 kv max. v 2.5 ka : 12 kv max. v 5ka : 12 kv max. clamping voltage 10 ka 10 ka 20 ka short duration (4/10 s) 75 a 150 a 250 a long duration (2 ms) 20 ka 50 ka 65 ka maximum peak current special test (4/10 s)
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