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Power Engineering Class I+II+III (T1+T2+T3) Combined Arresters PowerPro BCD, 2-pole PowerPro BCD TN/LED Combined modular multi-pole arrester for 1-phase TN systems. • With two green LED (operation). • Optional remote signalling contact (FM) L L' N N' Patented Patented n n PE 11 12 PE 11 12 Basic circuit diagram Technical Data PP BCD TN 25/50/LED PP BCD TN 25/50/LED-350 Nominal alternating voltage (UN) 230/400 V~ 230/400 V~ Max. continuous operating alternating voltage (Uc) 255 V~ 350 V~ Insulation resistance (Risol) > 10 GΩ >10 GΩ Protection level at 100% lightn. imp. sparkover voltage (1.2/50 µs) (Uas) ≤ 1.0 kV ≤ 1.0 kV Protection level at Iimp [L-PE] (Up) ≤ 1.0 kV ≤ 1.0 kV Response time (tA) < 50 ns
Power Engineering Class I+II (T1+T2) Combined Arresters PowerPro BC, TN-C, TN-S and TT Systems • All-in-one modular protection unit, ready for connection • Rare-gas-filled spark gap, hermetically sealed • Discharge capacity up to 100 kA (10/350 µs) • High quenching capacity of follow-on short-circuit currents • High insulation resistance • V-wiring with multi-functional terminals • Protection level ≤ 2,5 kV • High TOV resistance • Maximum operational availability • No blow-out vents, thus, not requiring any safety clearance to other installations • No leakage currents, thus, allowing installation upstream of power meters • Optional remote signalling contact (FM) requiring no additional space Multi-pole combined modular arresters for the protection of low-voltage consumers’ installations in business and residential areas against surges caused by lightning or switching actions in the network. The arresters can be installed at the transition 0 A to 2 according to the lightning protection zones concept. The SPDs are leakage current-free and protect the earthing system against dangerous ac-caused corrosion. Due to their good insulation against earth of ≥ 10 GΩ and the fact that no leakage-current affected varistors (MOV) are connected in parallel, they even can be placed upstream of the meter according to the specifications of the German VDN (TAB 2007). These SPDs of the series PowerPro BC feature a high thermal resistance and a discharge capability for lightning impulse currents of 25 kA (10/350 µs) per pole. Therefore, they can confidentially be applied at all protection levels according to DIN EN 62305 (VDE 0185-305). The modular designed, multi-pole complete units are available for TN, TN-C, TN-S, TN-C-S, and TT systems according to IEC (EN, VDE, OEVE, etc.) standards. They are shipped readyto-connect (on rail). They are also available for IT networks in country-specific versions with or without neutral conductor (N). Leutron also offers a special version with a higher operating voltage. The units can universally be installed at all export countries with nominal system voltages of 200 to 260 V. The TT system version discharges the impulse current between L and N. Between N and PE a Leutron summation current spark gap SumPro with 100 kA (10/350µs) will be applied which corresponds to the highest lightning protection class I according to VDE 0185-305 (IEC DIN EN 62305). With back-up fuses or circuit-breakers of more than 250 A, a selective back-up fuse (fusible cutout) of max. 250 A has to be installed to avoid an overload of the IsoPro caused by a high short-circuit current. The pre-assembled, two-pole busbars at the terminals allow a serial V-wiring of the SPD to a back-up fuse up to 125 A. In the case of single-pole units the individual SPD modules can optionally be delivered with integrated, non-resetable thermal sensors (/FM) or (/Pk). At an overload of the SPD the sensors open a hermeticallysealed, potential-free remote contact permanently. This remote state display for the individual SPD modules makes a periodical maintenance unneccessary. The sensors are already triggered before a possible damage of the SPD module, which then has to be replaced for security reasons. This way, with a minimum of additional acquisition costs the maintenance costs can be reduced considerably. The remote contacts have to be included in the order of the SPD. Retrofitting is not possible. The remote signalling contact (FM or Pk) is connected via a twisted-pair cable to an integrated plug-type terminal block of the SPD. The latching hooks per pole on both sides of the SPD allow for an installation on a 35 mm DIN rail, even under difficult mounting conditions inside the distributor. Leutron GmbH · Humboldtstrasse 30 · 70771 Leinfelden-Echterdingen · Germany · Phone +49 711 94771-0 · www.leutron.de 35
Page 3 and 4: Safety and Reliability Jörg Jelen
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