AC Technology Corporation
The AC Tech QC Series drive is a workhorse for Industrial and Commercial applications.
The QC was the first drive commercially available in the United States to incorporate the Intellegent Power Module (IPM) which has proven to be the most reliable means of building variable frequency drives. So vast an improvement over previous technology, that almost all manufacturers world wide have adopted this technology.
The QC1000 (available from 1hp to 150hp) and QC2000 (from 1 hp to 125 hp) are designed for constant torque applications and are available in steel enclosure from NEMA 1 to stainless NEMA 4X.
The QC3000 is for variable torque loads such as HVAC and Pumping applications from 1 hp to 250 hp. The QC3000 is available with across the line bypass and reactor options.
All models of the QC Series incorporate a large 2-line backlit LCD display and are available for all industrial and commercial supply power sources from 240 through 590 volts.
The QC Series drive allows for three speed reference input signals: speed potentiometer (10,000 Ohm), 4-20 mA, or 0-10 VDC. For control by a speed pot., the wiper lead is connected to terminal TB-5A, and the high and low end leads are connected to terminals TB-6 and TB-2, respectively. For 4-20 mA control, wire the positive to terminal TB-5B and the negative to terminal TB-2. For 0-10 VDC control, wire the positive to terminal TB-5D and the negative to terminal TB-2.
The QC1000 and QC2000 drives are capable of withstanding up to 150% current overload for 60 seconds, and the QC3000 is capable of 120% current overload for 60 seconds. Therefore, select a fuse or magnetic trip circuit breaker rated at a maximum of 1.5 (QC1000/2000), or 1.25 (QC3000) times the input current rating of the drive.
MC Series Success
The Treated Water is utilized to lower the temperature of water used for air conditioning in buildings, and then flows into the city's drinking water pipes. The project, initiated by Enwave District Energy Ltd., presently cools over 20 buildings in downtown Toronto. The Lake Ontario project begins with three high-density polyethylene pipes, 5 kilometers (3.10 miles) long, that reach 83 meters (272 feet) down to the bottom of Lake Ontario to draw
Then the Control will reduce the variable-speed pump flow, allowing the primary-pump to pull heated water back into the heater inlet. As the variable-speed pump reduces flow, more water is pulled into the heater inlet until the inlet set point is achieved and a portion of the heated water is pumped to the system supply. The Cold Water Run control panel consists of a 230 to 24 volt transformer, a reset switch, the terminal strip for the heater