Leprecon VX Dimmer - Manual (Page 5)

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2.2.1. Power Input
The VX dimmer is designed as a component for use in large, high-power stage lighting systems. It
is the responsibility of the user to understand and properly follow guidelines and regulations for
the use of equipment of this type. It is beyond the scope of this manual to fully explain all
requirements and implications of connecting and operating dimming systems in general and
Leprecon VX systems specifically.
If you have any doubts of your ability to specify, safely connect and use high-voltage, high-
powered equipment, please employ a qualified electrician.
3. VX Power Requirements
3.1. VX 2400 Power
The VX 2400 with the standard Terminal Power inlet requires 80 amps per leg of 3 phase power.
Because of the neutral currents that can occur with phase control dimmers, the neutral must be
capable of carrying 150% of the current of a single leg, or 120 amps. Two screw terminals are
provided for double neutral wires to meet this requirement. It is recommended that the safety
ground be equal to the capacity of the hot legs, or 80 amps.
The Leprecon VX dimmer systems are primarily designed for three phase, four wire with ground
power systems. Because of the variation in service from location to location, and the possibility of
improper connection, it is strongly suggested that the service is checked for proper voltage with a
meter before the dimmers are connected.
The VX 2400 consists of twelve circuits of twenty amps each. Nominal line voltage is 115 VAC at
60 Hz. Special order models are available for 50 Hz and 230 volt operation.
3.2. VX 1200 Power
The VX 1200 with the standard Terminal Power inlet requires 40 amps per leg of 3 phase power.
Because of the neutral currents that can occur with phase control dimmers, the neutral must be
capable of carrying 150% of the current of a single leg, or 60 amps. It is recommended that the
safety ground be equal to the capacity of the hot legs, or 40 amps.
The VX 1200 consists of twelve circuits of ten amps each. Nominal line voltage is 115 VAC at 60
Hz. Special order models are available for 50 Hz and 230 volt operation.
3.3. VX 3000 Power
The VX 3000 with the standard Terminal Power inlet requires 108 amps per leg of 3 phase power.
Because of the neutral currents that can occur with phase control dimmers, the neutral must be
capable of carrying 150% of the current of a single leg, or 162 amps. Two screw terminals are
provided for double neutral wires to meet this requirement. It is recommended that the safety
ground be equal to the capacity of the hot legs, or 108 amps.
The VX 3000 consists of twelve circuits of twenty seven amps each. Nominal line voltage is 115
VAC at 60 Hz. Special order models are available for 50 Hz and 230 volt operation.
3.4. Over voltage Protection and Power Indicator