Haas VF Series Service Manual

96-8100 1-15-96
168
TECHNICAL REFERENCE
SERVICE MANUAL
VF-SERIES
12. POWER TRANSFORMER ASSEMBLY (T1)
The power transformer assembly is used to convert three-phase 190/260V to three-phase 115V and is primarily used by the
servo drives. The video monitor, solenoids, fans, and oiler also use 115V AC. This transformers maximum input voltage is
260V @ 60 Hertz, and 240V @ 50 Hertz. It is located in the main cabinet in the lower right corner. It is rated at 12KVA and
its primary is protected to 40 amps.
This transformer has four voltage connections that allow for a range of inputs from 195V to 260V. The transformer has an
autotransformer primary to supply240V , three- phase to the spindle drives other 240V applications.
Fig. 12-1 Polyphase bank transformer.
12.1 PRIMARY CONNECTION TO T1
Input power to T1 is supplied through CB1, the 40 amp three-phase main circuit breaker. Three-phase 230 to T1 is
connected to the first three terminals of TB10.
12.2 VOLTAGE SELECTION TAPS
There are four labeled plastic terminal blocks. Each block has three connections for wires labeled 74, 75, and 76. Follow the
instructions printed on the transformer.
12.3 SECONDARY CONNECTION TO T1
The secondary outputfrom T1 is 115V AC three-phase CB2 protects the secondary of transformer T1 and is rated at 25 amps.
12.4 OPTIONAL 480 TRANSFORMER
Voltage Selection Taps for the 480 Transformer:
Right to left:
353 to 376
377 to 400
401 to 425
426 to 451
452 to 480*
* 480 V transformer has additional terminal block
195to 210 right side
211 to 226 right center
227 to 243 left center
244 to 260 left side
74, 75, 76

Haas VF Series Specifications

General

Machine Type	Vertical Machining Center
Control	Haas CNC Control
Z-Axis Travel	20-30 inches (varies by model)
Y-Axis Travel	16 - 30 inches (varies by model)
Spindle Motor	20-30 hp (depending on model)
Tool Capacity	20-40 tools (varies by model)