EnerPro 502-Tr (/Pk) - Leutron GmbH

Lightning- and Surge Protection
EnerPro 502-Tr (/Pk)
EnerPro
2-pole Lightning- and Surge Protective Device
10kA (max. 20kA)
For protection of DC–applications and Photovoltaic Systems
• Lightning- und Surge Protection of DC-mains and photovoltaic solar systems
• Protection circuit molded in water- and corrosion resistant polyurethane
• Monitoring of line interruption and function control by green LED
• Thermo-dynamic potential free remote signal contact Pk (option)
• Large size multifunctional terminals
• 2-pole, rigid 2-mod. DIN housing for snap-on 35mm DIN-rail
Product description
LEUTRON SPD type EnerPro 502-Tr (/Pk), serves as Lightning and Surge Protective Devices (SPD) installed at
the power supply side of DC equipments and systems. One SPD protects 2 lines (+ and -).
These LEUTRON - EnerPro SPD are equipped with a safety disconnection device, which will response safely
and cut off the SPD from net, if the built-in MOV would be thermally overloaded by a too high leakage current. In
such case, the green operating indication LED will extinguish and the SPD has to be replaced.
The thermic coupled remote signal contact (option) signalise that the SPD was overloaded and should be
replaced before the SPD is cut-off from net, because of safety reason.
The protective circuit is completely molded in Polyurethane and is built in an easy to install Polycarbonate
housing to snap on a 35mm DIN-rail (EN50022). Large multifunctional terminals for connection of bus-bars and
conductors for easy and safe wiring together with other DIN rail mounted devices.
Application
This robust and rigid protective device serves to protect DC- and photovoltaic systems against damages caused
by lightning surges.
If used in photovoltaic systems (PV) the EnerPro 502-Tr (/Pk) should be preferred to install in the PV-generator
connection box. Because the inverse rectifier probably is installed several meters far away, it is unprotected.
Therefore SPDs of same types as installed at the generator output has to be installed at the DC-side of the
inverse rectifier too.
Protects People and Valuables

Technical Data:
Application
2-pole lightning SPD with function indication by LED. Mostly used for protection of Photovoltaic systems to be
installed in the generator connection box and at the DC-input of inverse rectifiers. Option: remote signal contact
Type EnerPro 502-Tr EnerPro 502-Tr /Pk
Article No. 38 20 55 38 20 57
Nominal DC-voltage U n [V=] 500
Max. continuous DC-operating voltage U max [V=] 550
Max. mains-side overcurrent protection or SPD pre-fuse I [A] 100 A gL/gG
Voltage protection level at 1 kV/µs …L1, L2 – PE U as [kV] < 2.5
Voltage protection level at I N (i sn ) …...L1, L2 - PE U res [kV] < 2.5
Response time t A [ns] < 25
Nominal impuls discharge current…line to PE (8/20 µs) I N (i sn ) [kA] 10x 10kA
Max. impulse discharge current…….line to PE (8/20µs) I max [kA] 20
Operating temperature range T U [°C] - 25... +85
Min. cross sectional area for lightning SPD [mm2] 10
Max. cross sectional area (L1, L2 und PE) [mm2] 50 stranded / 35 flexible
Recommended screw terminal mounting torque [Nm] 4,5
Max. cross sectional area of remote signal contact (/Pk) [mm²] no 1,5
Max. electrical load of remote signal contact (/Pk) [V/A] no 1 N.C, 250V / 0.5A
Housing material / color
Polycarbonate (halogen free) UL 94-V0 / yellow
Molding material
Polyurethane
Degree of protection against ambient influence IP 20 (IEC 60529)
Snap-on mounting on DIN- rail 35 mm (DIN EN 50 022)
Dimensions in mm
Diagram
Housing size: 2 modules, acc. DIN 43880
Pk…….thermic remote signal contact (option
EnerPro 502 -Tr
21.09.2006 .pdf
Copyright © 2006 by LEUTRON GmbH
Subject to technical modifications and
delivery possibilities
LEUTRON GmbH
Lightning- and overvoltage protection
Humboldtstraße 30-32
D-70771 Leinfelden-Echterdingen
GERMANY
Telephone +49 711 / 9 47 71-0
Telefax +49 711 / 9 47 71-70
Email: info@leutron.de
www.leutron.de