2- and 4-line-filters

40 to 100 A

Single-stage

Stopband attenuation 150 kHz to 40 GHz

Features

Low volume and low voltage drop

Practically no leakage current flow on the grounding conductor in normal operation because of

the capacitor configuration (capacitive circuit to ground only through neutral)

Insertion loss to CISPR 17

Design

The electrical components are incorporated in an RF-tight case of high-grade steel. The cables

enter through glands. The RF-tight termination of the openings is produced by specially shaped

lids.

The conductors and equipment grounding conductor are connected by threaded bolts. The sur-

face around the fixing holes is left as bare metal (unpainted) to ensure good RF contact with met-

al surfaces (chassis, ground).

Protective measures (grounding)

The high capacitances between the lines and ground require special protective measures. If there

are no product-specific requirements, protection with a secondary ground wire (cross section min.

necting bolts at each end.

Resistors are incorporated in the filter to discharge capacitors after turn-off.

Scope of supply

Filters are supplied complete with all parts required for RF-tight installation (fixing screws,

flanges, RF gaskets, cable glands) and installation instructions.

Installation

No welding is needed on the shielding wall, so any subsequent installation is quite simple. And

the uniform template of the attachment points allows straightforward replacement of 2-line filters

by 4-line filters for example.

Accessories and special versions

RF-tight flexible connector fittings are available for installation spaced away from the shielding

wall. Filters with an EMP protection add-on for surge currents up to 100 kA per line are available

on request. To match requirements, filters can be supplied with different kinds of EMC or shield-

ing cable glands.

Tests

All filters are 100% tested and the results are archived under a filter's serial number. If required, a

test report can be generated for the serial number.

Filters for power lines (low leakage current)

B84261

40 to 100 A, 100 dB from 150 kHz

2