CNC SERIES ROTO-PHASE
+ 1 PH POWER =
Standard Features:
- Voltage Balance Within 2% or Less Under All Loading Conditions
- Heavy Duty Construction
- Available in ODP or TEFC Design
- Continuous Duty Cycle
- Easy Installation
- 1-YEAR WARRANTY
The “CNC Series” converter was developed in the early 1980’s when CNC (Computer Numerical Controlled) equipment began to flood the machinery market. Most standard or heavy duty phase converters on the market are not capable of providing the variable speed drive motors on the three-phase equipment with the adequate voltage supply required to operate this type of machinery. The CNC series phase converter is able to provide a stable “phase-to-phase” voltage condition which is between 1-2% under all loading conditions on the three-phase equipment. Unlike our competitors, who use transformers or capacitor switching via manual switches and contactors, the CNC series converter does not depend upon these types of devices which could pose a potential maintenance concern. The CNC series Roto-Phase converter has been field tested and proven reliable for years. It is truly unlike any rotary phase converter on the market because of its capabilities to deliver good starting torque and necessary voltage tolerances of 5% or less to the three-phase equipment load. From precision work on CNC machine tool and EDM equipment to lasers used for eye surgery, the CNC Roto-Phase converter is the most reliable unit on the market. When three-phase power is not available from the utility company or is not economically feasible, then the ARCO Roto-Phase is the best substitute. CNC Roto-Phase models are available from 1 HP to 50 HP sizes. FOR LARGER SIZES PLEASE CONSULT FACTORY
Note: A single-phase “buck & boost” transformer may be required for use in conjunction with the phase converter & three-phase equipment, when the single-phase voltage from the utility company is higher than the voltage tolerance requirements for the three-phase equipment. CONSULT THE FACTORY.
BUILD-IN CONTROL PACKAGE OPTIONS
- Magnetic Starter With Overload Protection (Push Button Start/Stop or Automatic Option)
- Surge Arrestor

SPECIFICATIONS | Approx Ship Wt. | |||||||
---|---|---|---|---|---|---|---|---|
MODELS | A | B | C | D | E | PANEL | AUX BANK | |
CNC1 | 13.00" | 11.00" | 10.00" | 7.00" | 9.00" | 10x8x6 | 95 Lbs. | |
CNC2 | 16.00" | 13.00" | 13.00" | 8.00" | 10.00" | 16x12x6 | 159 Lbs. | |
CNC3 | 17.00" | 14.00" | 13.00" | 10.00" | 12.00" | 16x12x6 | 239 Lbs. | |
CNC5 | 19.00" | 16.00" | 16.00" | 12.00" | 12.00" | 18x18x10 | 285 Lbs. | |
CNC7 | 23.00" | 18.00" | 21.00" | 13.00" | 13.00" | 18x18x10 | 365 Lbs. | |
CNC10 | 25.00" | 20.00" | 24.00" | 14.00" | 15.00" | 18x18x10 | 448 Lbs. | |
CNC15 | 27.00" | 22.00" | 25.00" | 15.00" | 17.00" | 18x18x10 | 703 Lbs. | |
CNC20(**) | 25.00" | 20.00" | 24.00" | 14.00" | 15.00" | 18x18x10 | 950 Lbs. | |
CNC25(**) | 25.00" | 20.00" | 24.00" | 14.00" | 15.00" | 18x18x10 | 1318 Lbs. | |
CNC30(**) | 27.00" | 22.00" | 25.00" | 15.00" | 17.00" | 18x18x10 | 1412 Lbs. | |
CNC40(****) | 25.00" | 20.00" | 24.00" | 14.00" | 15.00" | 18x18x10 | 1792 Lbs. | |
CNC50(****) | 25.00" | 20.00" | 24.00" | 14.00" | 15.00" | 18x18x10 | 2636 Lbs. | |
CNC60(****) | 27.00" | 22.00" | 25.00" | 15.00" | 17.00" | 18x18x10 | 2812 Lbs. |
(**)Two Units Paralleled (***) Three Units Paralleled (****)Four Units Paralleled
With the addition of optional features, the panel size of the phase converter model may change – Please Consult Factory.
ARCO Electric Products reserves the right to make product changes without prior notification.