The right residual current circuit-break

er

for e-mobility:

» Protects upstream Type A RCDs from the effects of DC current above 6 mA

» specifically designed for electromobility charge point applications

» No other components required for residual current protection

DFS 4 EV

DoepkeThe experts in residual current protection technology

Residual current circuit-breaker DFS 4 EV specifically developed for use in charge points and wall-boxes for charging electric vehicles (EV).

It is used where an upstream residual current operated protective device is not known or where an AC, A or F type RCD is in use.

The DFS 4 EV provides the required protection from dangerous residual currents at every single charging point. For example it also protects an upstream residual current operated protective device from the risk of not tripping for DC residual currents created by the charging equipment.

What does the DFS 4 EV offer?

For use in EV charge points

» complete residual current circuit-breaker independent of auxiliary voltage for detecting type A residual currents » additional voltage dependent function for detecting smooth DC residual currents at max. 6 mA » in compliance with disconnection times to IEC 60364-4-41 » maintains protective function of upstream RCD (e.g. in TT system) » safe isolation » personal and fire protection as per IEC 60364-5-53 even at high frequencies » two or four-pole version in 4-HP housing » two-pole design with rated current up to 25 A » four-pole design with rated current up to 40 A » specially developed for protection when charging electric vehicles » no other components required per charging point for residual current protection

Doepke

The right combination makes a difference

Wallbox

DFS 4 EVAI∆n = 30 mAI∆nDC = 6 mA

iF DC

iF DC

iF DC = 6 mA

iF DC = 6 mA iF DC = 6 mA

RCDType B

Type BAGFI∆n = 300 mA

TT-System

RCDDFS 4 EV

iF DC = 6 mA

RCDDFS 4 EV

iF DC ges 12 mA

iF DC ges 12 mA

RCDDFS 4 EV

Wallbox

DFS 4 EVAI∆n = 30 mAI∆nDC = 6 mA

iF DC

iF DC

iF DC

iF DC

iF DC

iF DC = 6 mA

RCDType A

Type AAI∆n = 30 mA

TT-System

RCDDFS 4 EV

Wallbox

DFS 4 EVAI∆n = 30 mAI∆nDC = 6 mA

iF DC = 12 mA

iF DC

iF DC

iF DC ges 12 mAiF DC = 6 mA

iF DC = 6 mA iF DC = 6 mA

iF DC = 6 mA

TN-System

RCDDFS 4 EV

Wallbox

DFS 4 EVAI∆n = 30 mAI∆nDC = 6 mA

iF DC

iF DC

iF DC

iF DC

iF DC

iF DC = 6 mA

RCDType A

Type A

AI∆n = 30 mA

TN-System

RCDDFS 4 EV

If charging equipment is connected to a standard socket protected by a type A RCD, smooth DC residual currents must be limited to max. 6 mA in the event of a fault, in order to prevent the upstream RCD from failing.

An upstream RCD may not be required for a fixed installation – refer to local connection regulations.

An upstream RCD is required even for charging equipment with fixed connections in order to meet the disconnection times for a TT network. The RCD EV prevents the RCD from failing.

An upstream type B RCD is required when more than one charge device is used, because the DC residual currents can add up in the event of a fault. An upstream type A RCD can no longer fulfil its protective function.

According to IEC 60364-7-72 every connection point (plug socket) must be fitted with its own residual current operated protective device (RCD) with rated residual current I∆n ≤ 30 mA. Measures must also be taken to ensure protection in the case of smooth DC residual currents that are higher than 6 mA.

What does the standard say?

Thanks to residual current circuit-breaker DFS 4 EV, the required residual current protective measures can be implemented without compromise for EV sockets at charge points and in wall-boxes. It provides safe isolation both from type A residual currents and from DC residual currents higher than 6 mA. This extra protection prevents upstream RCDs from failing and ensures that they continue to protect the existing electrical system.

The perfect solution

DoepkeSchaltgeräte GmbH

Stellmacherstraße 11 26506 Norden, GermanyTel. +49 4931 1806-0Fax +49 4931 1806-101Email: info@doepke.de www.doepke.de

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