DLVP50-300-3000A Dynaload DC Electronic Load
- Load Voltage: 0-50 V
- Load Current: 0-300 A
- Power Dissipation: 0-3000 W
- Overload rating: 20%
- Overvoltage: less than 60 V
- Overcurrent: less than 350 A
- Over-power: less than 3500 W
The Dynaload DLVP 50-300-3000A is a precision instrument which simulates electrical loads to test power supplies, generators, servo systems, batteries, and similar electrical power sources. It simulates, at the option of the user, resistive loads (amps/volt) or may be switched to a constant current load characteristic (current regulated at a pre-selected value) or a constant voltage type of load (similar to a battery or a zener diode). Provisions are also made for external programming in automated test set-ups. The external programming voltage is from 0-10 V, with an input impedance of 10K minimum. Load current is directly proportional to programming voltage, and the sensitivity is adjustable with the front panel current adjustments.
In addition to the constant current external programming, the Dynaload may be programmed by an external resistance to function as a resistive load. The load resistance is inversely proportional to the programming resistance.
The pulse load may be varied in frequency and 10-100% duty cycle (pulse width). Frequency ranges are 20-200 Hz, 100-1000 Hz, and 500-5000 Hz.
Pulse amplitude is independently controlled and may be added to a preselected DC current by the combination of the front panel controls. The meter normally reads peak pulse current, so the DC current should be preset, and the pulse current is the difference between the peak reading and the previous DC reading. The output of the internal pulse generator is available at the rear panel (TB1-1). The pulse wave form may be modified by inserting wave-shaping circuitry between TB1-1 and TB1-2, which are normally jumpered together by a clip on the terminal block.
The circuit breaker used to connect the source to the power devices in the load is electronically controlled and senses overcurrent, over-dissipation (volts x amps), and overvoltage.
In the event of an overvoltage or over-temperature condition, protection circuits open the electronic circuit breaker. In the event of an overcurrent or over-power condition, circuitry is activated to limit the load current, and a front panel "power limit" LED is lit. If the current and power are increased further, protective circuitry will open the electronic circuit breaker. The power transistors are turned off prior to the circuit breaker opening.