AAA Power System Constant Power 6 AR005C0200T1 5KVA 220V In 120/240V Out 41A

AAA Power System Constant Power 6 AR005C0200T1 5KVA 220V In 120/240V Out 41A

The AAA Power System Co. Constant Power 6 is a 5 KVA constant-voltage transformer (CVT) line conditioner designed to accept a 220V AC input and deliver regulated 120V and 240V output across up to six independent circuits. Unlike a standard UPS with a battery, a constant-voltage transformer conditions power passively through magnetic resonance — the toroidal transformer inside maintains a stable output voltage even when the input line fluctuates, providing protection from voltage sags, surges, and noise without batteries or electronics. This unit was manufactured by AAA Power System Co. of City of Commerce, CA and dates from early 1990 per the rating plate.

Specifications & What's Included

• Manufacturer: AAA Power System Co., City of Commerce, CA
• Product Line: Constant Power 6
• Model: AR005C0200T1
• Serial Number: 90-6T0504 B
• Date Code: 2-16-90 (February 1990)
• Power Rating: 5.0 KVA
• Input Voltage: 220V AC
• Output Voltage: 120V / 240V
• Output Current: 41A
• Number of Output Circuits: 6 (Circuits 1–6 on rear panel)
• Circuit 1: Locking receptacle + individual Square D breaker
• Circuit 2: Locking receptacle + individual Square D breaker
• Circuit 3: Blank cover plate (receptacle not installed)
• Circuit 4: Blank cover plate (receptacle not installed)
• Circuit 5: Breaker present; cover plate installed
• Circuit 6: Breaker present; cover plate installed
• Front Panel: Main Input Breaker (Square D, 10A), PWR ON pilot indicator, Operating Range Indicator LEDs (5 green LEDs)
• Bypass/Isolation Switch: AUTO/MAN rotary selector on front panel
• Service Required indicator on front panel
• Equipment Ground terminal on rear panel
• REPO (Remote Emergency Power Off) terminal on rear panel
• Input Connector: 30A, 250V twist-locking plug (attached input power cable included)
• Internal transformer: large toroidal design, visible with enclosure panels removed
• Form Factor: Floor-standing cabinet on four casters
• UL Listed — Information Processing Equipment (per rear panel label, 95J3)
• Includes: input power cable with 30A 250V locking plug

Applications

Constant-voltage transformers like the Constant Power 6 were widely used from the 1970s through the 1990s to protect sensitive information processing and laboratory equipment from power line disturbances. Unlike battery-based UPS systems, a CVT conditions power continuously through ferroresonance — the toroidal transformer saturates magnetically to hold the output voltage steady across a range of input variation. This made them a common choice for mainframe computer rooms, minicomputer installations, medical imaging equipment, and scientific laboratory instrumentation where clean, stable voltage was critical but battery backup was not the primary requirement. The six-circuit output panel allowed a single Constant Power 6 unit to serve an entire equipment rack or small computer room. These units were typically installed in data centers, university computing facilities, and industrial control rooms. The 220V single-phase input configuration suited facilities with dedicated 208–240V branch circuits, common in commercial and light-industrial settings. Today, ferroresonant CVTs have largely been replaced by electronic line-interactive and double-conversion UPS systems, but they remain valued for parts, transformer cores, and educational or specialty power-conditioning applications.