Weidmuller PU-Overvoltage in Mains Control Uživatelský manuál stáhnout pdf (Strana 4)

Protection according to IEC

61024-1, IEC 61312-1

Protection according to IEC

60364-4-443

Fig. 1 Overvoltage protective equipment in TN network

Fig. 2 Overvoltage protective equipment in TT Network with the 3+1 PU Module

1 Main supply system

2 Electrical circuit distributor

3 Branch circuit area

4 Main equipotential bonding strip

5 Overvoltage protection protective equipment Class I for lightning protection potential equalizer

5a 3+1 PU Unit with N-PE Lightning current arrestor

6 Main equipotential bonding conductor

7 Overvoltage protection-protective equipment Class II PU 3 C / PU 4 C

8 Overvoltage protection-protective equipment Class III PU D in the TN System

8a Overvoltage protection-protective equipment Class III PU D in the TT System

9 9a Overvoltage protection protective equipment Class II PU 3+1 C for TT System

10 RCD ( Residual-current device)

11 Arrester disconnector

HAK Service panel

R Earth

Equipment earth

Wh Measuring device

F1 Input terminal fuse

F2 Fuse for PUxB necessary only by max. 160 A (depending on type of routing ), if F1> 160 A.

F3 Fuses for Electrical circuit distributor

F4 Fuse for PUxC necessary only by max. 125 A (depending on type of routing), if F1> 125 A.

F5 Circuit breaker 16 A

*1) Construction before taking measurements should be agreed with the local ESC.

*2) If a lightning protecting equipotential equalizer exists, then it must be connected to the earthable points

of the overvoltage protective equipment.

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Weidmuller PU-Overvoltage in Mains Control Uživatelský manuál Strana 4