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QPAC User's Manual
Appendix
Specifications
QPAC Specifications—(1293)
Operation
• Modular control base with plug-in card and transformer
• Plug-in control cards
Solid state contactor, Å(ac) or Î(dc) input
Burst fire control, fixed or variable time base
Phase angle fire control
Phase angle control with soft start and current limiting
• Plug-in transformers (50/60Hz)
• 120, 208, 240, 277, 380, 415, 480, 575V~(ac) operation
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Power bases
• Single phase (Q01), 1 pair of SCRs
• Three phase (Q32), 2 leg control, 2 pair SCRs. Resistive load only, burst
firing only.
• Three phase (Q33), 3 pair hybrid SCRs/diodes. Recommended for phase
angle only with balanced load.
• 30 through 1000 amps per switched leg.
Agency Approvals
• UL 873 to 300 amps, File #E43684, formerly #E67609
• UL 508 and C-UL Listed to 300 amps, File #E73741
• No agency approvals beyond 300 amps.
Control Card Inputs
(CA) Solid state contactor, ac input
• 120V~(ac) @ 30mA minimum
• Å(ac) signal input sources (i.e., triacs or mechanical relay outputs with
noise suppression) require customer supplied resistors across the power
controller Å(ac) command signal input terminals to prevent false firing.
24V~(ac) input, 200Ω/10 watts typical;
120V~(ac) input, 1kΩ/25 watts typical;
240V~(ac) input, two 1kΩ/25 watts in series typical
(CD) Solid state contactor, dc input
• ON, 4-10VÎ(dc) @ 0.5mA; OFF, 0.5VÎ(dc)
• Built-in noise reduction network
(BF) Burst firing control fixed time base
• Process input factory set @ 4-20mA Î(dc)
• Input impedance 250Ω (clip resistor for 5kΩ voltage input), or manual
control input
• Time base 4 seconds (clip resistor for 1 sec)
(BV) Burst firing control, variable time base
• Process input factory set @ 4-20mA Î(dc)
• Input impedance 250Ω (clip resistor for 5kΩ voltage input), or manual
control input
(AF) Phase angle control
• Process input factory set @ 4-20mA Î(dc)
• Input impedance 250Ω (clip resistor for 5kΩ voltage input), or manual
control input
• Soft start approximately 6 seconds upon power-up, 1 second upon set
point change
(AL) Phase angle control with current limit
• Process input factory set @ 4-20mA Î(dc)
• Input impedance 250Ω (clip resistor for 5kΩ voltage input), or manual
control input
• Soft start approximately 6 seconds upon power-up, 1 second upon set
point change
• Current transformer included
• 120V~(ac) through 575V~(ac)
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•1 or 3 pole only
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