User Manual

Page 17
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
ENS2
2.2.3 Wiring of version „ENS2“
Version „ENS2“ is delivered without contactors. Connections from and to the module are lead
out to screw terminals and are wired by the installer according to one of the wiring schemes
above (type 1 or 2) and connected to the external contactors.
2.2.3.1 Additionally required material (not included)
• 4-wireor5-wire,inexibleorexiblecableswithacrosssectionmatchingthemax.outputcurrentoftheenergy
recovery system
• Whenusingexiblecables:cableendsleevesmatchingthecrosssection
• Suitable main fuses for the unit(s) respectively the whole installation, depending on the total current
2.2.3.2 Steps to wire version „ENS2“
Also see the wiring schemes in „2.2.2. Types of installation“. Assuming that the contactors, which are installed
separately, are already mounted:
1. Prepare the cables (cut to required length).
2. Stripcableends(~8mm)and,ifexiblecablesareused,crimpcableendsleeves.
3. Loosen the screws in the screw terminals.
4. Connect the ENS2 AC input connectors in parallel to the input of the 1st contactor.
5. Connect the contactors to each other.
6. Connect the coils of the contactors to the ENS2: Coil of contactor 1 to terminal R2 and N wire, coil of contactor
2 to R4 and N wire, furthermore bridges between phase L1 and R1, as well as phase L1 and R3
7. If wiring type 1 (without feedback contact): Bridge between R2 and K1, as well as R4 and K2
If wiring type 2 (with feedback contact): Feedback contact of contactor 1 to terminal K1, contact of contactor 2 to K2
8. Connect the contactor 1 via main circuit breakers (or fuses) to the grid (public or local).
9. Connect the AIU to mains (see rear view of ENS2, left-hand terminals).