Constant Voltage / Current Limiting Power Supply
The RA Series power supplies provide SCR pre-regulated linear output with high power, good regulation and low ripple. They find application both in the laboratory and in systems where both versatility of operation and a high degree of regulation is required. These power supplies are provided with rear barrier terminal strip for ease in output wiring. The RA Series operates as a constant voltage (CV) power supply for excellent regulation and has built in current limiting (CL) for protection of the external load.
3 ½” Model
|RA20-15A||0-20 V||0-15 A|
|RA40-10A||0-40 V||0-10 A|
|RA60-7A||0-60 V||0-7 A|
|RA125-3.2A||0-125 V||0-3.2 A|
5 ¼” Model
|RA20-25A||0-20 V||0-25 A|
|RA40-20A||0-40 V||0-20 A|
|RA60-14A||0-60 V||0-14 A|
|RA125-6.5A||0-125 V||0-6.5 A|
|RA40-30A||0-40 V||0-30 A|
|RA60-20A||0-60 V||0-20 A|
|RA125-10A||0-125 V||0-10 A|
|RA250-5A||0-250 V||0-5 A|
|RA40-50A||0-40 V||0-50 A|
|RA60-30A||0-60 V||0-30 A|
|RA125-20A||0-125 V||0-20 A|
|RA250-10A||0-250 V||0-10 A|
|RA25-100A||0-25 V||0-100 A|
|RA40-70A||0-40 V||0-70 A|
*220VAC 50/60 Hz 1 Phase Standard
Input: 115 VAC or 220 VAC ±10% 50/60 Hz Single Phase depending on the model.
Output: See specific model in table.
The output is floating and either side may be grounded.
Load Regulation: 0.01% of the maximum rated voltage for a full load step.
Line Regulation: 0.01% of the maximum rated voltage for a line change within specified input voltage range.
Ripple: ≤1 mV RMS.
Response Time: The output voltage is within regulation limits in less than 100 microseconds for a ½ load step. The output voltage will remain within regulation limits for input line step within specified voltage range.
Remote Sensing: Units provided with remote sense terminals at the rear for regulation at the point of load.
Remote Programming: All units are voltage programmable at approximately 1000Ω / Volt.
Series / Parallel Operation: Two or more units may be operated in series. Two units of the same voltage and current may be operated in parallel.
Temp. Coef.: 0.02% / °C
Stability: Better than 0.05% / 8 hours at constant line, load and temperature after ½ hour warm up.
Operating Temperature: 0°C to +60°C at any combination of line, load and temperature without the need for external cooling.
Terminations: Barrier strip terminals are provided at the rear for AC input, output, sensing, remote programming, slaving and ground.
Protection: The power supply is protected by a fuse in the input line. 8¾” & 10½” models are protected by a circuit breaker. The output of the supply is protected by means of a fully adjustable current limiting circuit.
Panel Controls: Voltmeter, Ammeter, 10 turn voltage control, 10 turn current control, pilot light and ON/OFF switch. The voltage and current control is fully adjustable from 0 to Full Range by means of 10 turn panel potentiometers.
Finish: The standard front panel finish is light blue.
Size: 8¾” & 10½” Models: 19“ (WIDE) x 22” (DEEP)
All Other Models: 19” (WIDE) x 16½” (DEEP)
|2||3-Wire Line Cord Instead of Barrier Terminal Strip for Input|
|6||Over Voltage Protection|
|29||Optional 220 VAC Input|
|36||Voltage/Voltage Programming (0-10V = Full Rated Output Voltage)|
|52||Voltage/Current Programming (0-10V = Full Rated Output Current)|
|62||3½ Digit Digital Meters|
|85||Voltage/Voltage Programming (Isolated Input 0-10V = Full Rated Voltage)|
|90||Voltage/Current Programming (Isolated Input 0-10V = Full Rated Current)|
|108||RS232 Control with Readback|
|110||RS485 Control with Readback|
|112||IEEE-488 Control with Readback|
|123||RJ45 Control with Readback|