Connecting TWO Power Supplies in Series

OPERATING INSTRUCTIONS

CONSTANT VOLTAGE/CONSTANT CURRENT

CHARACTERISTIC

The working characteristic of this power supply is called a constant voltage/constant current automatic crossover type. This permits continuous transition from constant current to constant voltage modes in response to the load change. The intersection of constant voltage and constant current modes is called the crossover point. Fig. 7 shows the relationship between this crossover point and the load.

For example, if the load is such that the power supply is operating in the constant voltage mode, a regulated output voltage is provided. The output voltage remains constant as the load increases, up until the point where the preset current limit is reached. At that point, the output current becomes constant and the output voltage drops in proportion to furt her increases in load. The crossover point is indicated by the front panel LED indicators. The crossover point is reached when the CV indicator goes off and the CC indicator comes on.

Similarly, crossover from the constant current to the constant voltage mode automatically occurs from a decrease in load. A good example of this would be seen when charging a 12-volt battery. Initially, the open circuit voltage of the power supply may be preset for 13.8 volts. A low battery will place a heavy load on the supply and it will operate in the constant current mode, which may be adjusted for a 1 amp charging rate. As the battery becomes charged, and its voltage approaches 13.8 volts, its load decreases to the point where it no longer demands the full 1 amp charging rate. This is the crossover point where the power supply goes into the constant voltage mode.

Two Model 1735A power supplies may be connected in series to provide a variable 0-60 volt output. In this configuration the power supply can supply up to 3 amps. See Fig. 8 for the connection scheme.

Figure 7. Constant Voltage/Constant Current Characteristic.

When connected in series, the VOLTAGE controls of each power supply exercise control over a 0-30 volt range. Add the LED display readings together or connect external voltmeter across the load to determine the total output voltage.

Load current may be monitored from either supply; the readings will be identical since they are connected in series. Also, since the supplies are connected in series, it is only necessary to set the current limit on one of the supplies; the other may be set for maximum.

0-30V, 0-3A specifications

The B&K 0-30V, 0-3A power supply is a versatile and reliable laboratory instrument designed for various applications in electronics and electrical engineering. Known for its precision and efficiency, this device is an essential tool for engineers, researchers, and hobbyists alike.

One of the main features of the B&K power supply is its adjustable output voltage ranging from 0 to 30 volts. This wide voltage range allows users to test and power a variety of electronic devices and circuits, ensuring compatibility with different components. The current output is rated at 0 to 3 amperes, providing ample power for most standard applications while adhering to safety standards and preventing overload situations.

The device employs advanced linear regulation technology, which guarantees low ripple and noise levels in the output signal. This ensures that sensitive electronic components receive a stable and clean power supply, which is crucial in maintaining the integrity of experimental results. Additionally, the linear design contributes to the longevity and durability of the power supply, making it an enduring choice for professionals.

Another notable characteristic is its user-friendly interface, featuring easy-to-read analog meters that provide real-time feedback on voltage and current levels. This feature enhances the precision of adjustments and simplifies the monitoring of power output during experiments. Moreover, the intuitive layout of controls allows users to make quick adjustments without navigating through complex menus.

The B&K 0-30V, 0-3A power supply is also designed with safety in mind. It incorporates overload protection and short circuit protection mechanisms, which safeguard both the power supply and the connected devices from damage. This level of protection is essential in laboratory settings where equipment cost can be significant.

In terms of build quality, the B&K power supply is constructed with robust materials that ensure impact resistance and reliability. Its compact design makes it easy to fit into crowded workbenches, while still providing ample connectivity options.

Overall, the B&K 0-30V, 0-3A power supply stands out in its category with its remarkable features, advanced technologies, and reliable characteristics. Its combination of precision, durability, and safety makes it a preferred choice for anyone involved in electronics testing, prototyping, and research. Whether in a professional laboratory or a DIY setting, this power supply delivers performance that meets the demanding needs of modern electronics.