7224 amplifier


Up to 52Apk current source, ideal for protection relay production testing and commissioning.

The 7224RLYwas created to meet the demanding requirements of the power utility industry. Capable of outputting a 40 mSec pulse with up to 52 amperes peak current, the 7224RLY is powerful enough to put protection relays, fuses and other critical components through a full range of tests. The low noise floor, low distortion and minimal phase error of the 7224RLY make it the ideal amplifier for power grid modeling.


  • High compliance voltage allows the 7224RLY to drive electromechanical relays directly.
  • Maintains phase accuracy for any load from a dead short to 2 ohms.
  • Front panel indicators for rapid assessment of amplifier status.
  • Designed to survive input overloads, continuous operation under demanding conditions and improper output conditions – including improper loads.
  • Shipped ready to operate from single-phase, 120VAC (±10%) 60 Hz, 20A service. 220/240VAC, 50/60Hz, 10A model available on request.
  • Installs in just 2U of a standard 19-inch rack; or stands alone for bench-top operation.
  • Backed with AE Techron’s application engineering, service facilities, complete technical information and a 1-year warranty.



Pulse/Burst Specifications




1.0 ohms 5 minute 60 Hz Sine 28A rms / 40A peak
DC 20A peak
20 second 60 Hz Sine 30A rms / 43A peak
DC 20A peak
0.2 second 60 Hz Sine 33A rms / 47A peak
DC 30A peak


Frequency Data

7224 Voltage Potential vs. Frequency

Physical Characteristics

Display, Control, Status, I/O

Front Panel7224 amplifier front panel controls

LED Displays Indicate: Run, Ready, Standby, Stop, Fault, Over Temp, Over Voltage, Overload

Soft Touch Switches for: Run, Stop, Reset

Gain Control, when enabled: Voltage gain adjustable from 20 to 0

On/Off Breaker

7224 amplifier on/off switch

Back Panel

Power Connection: 25 Amp IEC (with retention latch)

Signal Output: +/Common/Sampled Common

Signal Input: User Selectable BNC or Barrier Strip, Balanced

7224 amplifier back panelCommunication Capabilities

Current Monitor: +/- 1V / 6A +/- 1%

Input Signal Monitor: +/- 1V . 2V +/- 1%

Reporting: System Fault, Over Temp, Over Voltage, Over Load

Control: Force to Standby, Reset after a fault

Physical Characteristics

Chassis: The amplifier is designed for stand-alone or rack-mounted operation. The chassis is black aluminum with a powder-coat finish. The unit occupies two EIA 19-inch-wide units.

Weight: 41 lbs (18.6 kg), Shipping Weight: 51 lbs (23.2 kg)

AC Power: Single phase, 120VAC, 60 Hz, 20 Amp Service; 220-240 VAC, 50/60 Hz, 10 Amp model available

Cooling: Forced air cooling from front to back through removable filters

Dimensions: 19 in. x 22.75 in. x 3.5 in. (48.3 cm x 57.8 cm x 8.9 cm)