Delta Tau Geo Brick, User Manual

Page: 32 / 294

Geo Brick Drive User Manual
Pinouts and Software Setup 32
Magnetic Contactors
SC-E series from Fuji Electric or similar contactor can be used.
Line Filters
Line filters eliminate electromagnetic noise in a bi-directional manner (from and into the system).
T type filters are NOT recommended. PI type line filters are highly advised:

Filter should be mounted on the same panel as the drive and power source.

Filter should be mounted as close as possible to the power source.

Filter should be mounted as close as possible to incoming cabinet power.
FN-258 series from Schaffner or similar filter can be used.
Voltage Suppressors
Voltage suppressors eliminate undesirable voltage spikes typically generated by the magnetic contactor or
external machinery in the plant.
This 3-phase
voltage arrester from Phoenix Contact or similar suppressor can be used.
Bus Power Cables
The Geo Brick Drive electronics create a DC bus by rectifying the incoming AC lines. The current flow
into the drive is not sinusoidal but rather a series of narrow, high-peak pulses. Keeping the incoming
impedance small is essential for not hindering these current pulses.
Whether single- or three-phase, it is important that the AC input wires be twisted together to eliminate
noise radiation as much as possible. Recommended wire gauge:
Model
Wire Gauge
(AWG)
Model
Wire Gauge
(AWG)
GBL4-xx-5xx 12 GBL8-xx-552 10
GBL4-xx-8xx 10 GBL8-xx-882 8
GBL6-xx-5xx 8 GBL8-xx-582 8
GBL6-xx-8xx 8 GBL8-xx-852 8
Note
All ground conductors should be 8AWG minimum using wires
constructed of many strands of small gauge wire. This ensures the
lowest impedance to high-frequency noises.