PRG DMX Reference Guide 5.4 - Manual (Page 34)

26 DMX512 REFERENCE GUIDE
Bucking Transformer
Note: In Europe, the Bucking Transformer is needed only with VL2C luminaires and where the primary voltage rises
above 240 VAC (245 VAC in Europe).
The Bucking Transformer is used when the primary voltage is above 240 volts (or
245 volts in Europe). In Europe and Australia, among other places, primary
voltages can fluctuate between 240 and 265 VAC throughout the day, causing the
system to shut down. The Bucking Transformer is designed to reduce the primary
voltage by 10 or 20 percent, bringing voltages within acceptable limits. Even if
there is a temporary reduction in primary input voltage below 180 VAC (the lower
limit), once the system is running, it will not actually shut off until the voltage falls
to 160 VAC. The Bucking Transformer is only necessary where the primary
voltage rises above 240 VAC (or 245 VAC in Europe).
The unit connects to the system by a set of five 2/0 pig tails. It also provides a
125A circuit breaker switch.
Figure 2-3: Bucking Transformer
INPUT OUTPUT
Neutral (White)
X Phase (Black)
Y Phase (Red)
Z Phase (Blue)
Ground (Green)
Neutral (White)
X Phase (Black)
Y Phase (Red)
Z Phase (Blue)
Ground (Green)
Bare wire to Cam-Lok pigtails
from House AC service Cam-Lok to Cam-Lok pigtails
to ACS or Mod Rack