Product Overview

Table Of Contents

3RT1 contactors/3RH1 control relays

SIRIUS System Manual

GWA 4NEB 430 0999-02 DS 01

3-109

Description The connection of the main conducting path to the EMC suppression mod-

ule reduces the contact sparking that is responsible for contact erosion and

many of the disturbances, which in turn supports an EMC-compatible config-

uration.

Mode of operation The EMC suppression module reduces through 3 phases the radio-fre-

quency parts and the voltage peaks. The advantages of this are as follows:

• Longer service life of the contact pieces

• Higher operational reliability and high system availability

A fine grading within the performance class is not required because smaller

motors have greater inductance due to their construction, and one EMC sup-

pression module is thus sufficient for all non-stabilized drives up to 5.5 kW.

Variants Two electrical variants are available:

•RC circuit

• Varistor switching

Circuit diagrams

Fig. 3-70: circuit diagrams

Installation

Fig. 3-71: EMC suppression module

R_L1

R_L2

R_L3

C_L1

C_L2

C_L3

2T1 4T2 6T3 2T1 4T2 6T3

V_L1

V_L2

V_L3

The EMC suppression module is

attached to the underside of the con-

tactor. To do this, hook the EMC sup-

pression module with both hooks onto

the contactor, and push it upward until

the connection pins of the EMC mod-

ule are firmly in place in the terminal

openings of the contactor.

3RT19 16-1P..