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EA-3033

EA Elektro-Automatik EA-3033 Laboratory DC Power Supply, 0-20 V, 20/30 A, analogue meters

Kategori Other Power Supplies, UPS & Energy

Enhet: pcs

Art.nr (normaliserat): EA3033

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Om EA-3033

The EA-3033 is a high-current laboratory DC power supply ('elektronisch stab. Labor-Netzgerät') from Elektro-Automatik, Germany. Its front panel gives the rating as 0-20 V and 20/30 A.

Output voltage is set with a single 0-20 V knob. Moving-coil meters show output voltage ('Ausgangsspannung', 20 V scale) and output current ('Ausgangsstrom', 36 A scale, marked in colour from about 20 A upwards). Output is on a red and black terminal pair, with an Ein/Aus mains switch. Four power transistors (type 2N3772) sit on finned heatsinks at the rear of the steel case.

A supply like this is used where a low voltage at high current is needed, such as for motors, heaters, battery-powered equipment or vehicle electronics. EA does not publish data for this older model today, so only the panel markings are given.

Vanliga frågor

What does '20/30 A' on the panel mean?

The panel states the rating as 20/30 A without explanation, and no EA document for this model could be found. The ammeter scale runs to 36 A and is coloured from about 20 A up.

Is there a current-limit control?

Only a voltage knob is fitted on the front panel; there is no separate current-limit knob.

Specifikationer

Meters	Analogue voltmeter (20 V scale) and ammeter (36 A scale)
Made in	West Germany (panel marking)
Outputs	1
Controls	Voltage knob 0-20 V; mains switch
Regulation	Electronically stabilised (panel marking)
Output current	20/30 A (front panel marking)
Output voltage	0-20 V (front panel marking)
Output terminals	Red and black binding posts
Pass transistors	4 x 2N3772 on rear heatsinks