AC electronic loads deliver up to 4500 W
-- Test & Measurement World, 2/1/2009 2:00:00 AM
Chroma’s 63800 series of AC electronic loads is intended for testing UPSs (uninterruptible power supplies), batteries, off-grid inverters, AC sources, and other power devices such as switches, circuit breakers, fuses, and connectors. Each load can simulate conditions under high crest factor and varying power factors with real-time compensation, even when the voltage waveform is distorted. This feature provides real-world simulation and prevents overstressing to obtain unbiased test results.
The series comprises two models. The Model 63803 provides 1800 W of power at 0 to 15 A RMS (45 A peak, continuous) and 50 V to 350 V RMS. The Model 63804 provides 4500 W at 0 to 45 A RMS (135 A peak, continuous) and 50 V to 350 V RMS. These units let you measure critical timing parameters, such as battery discharge time, trip time for fuse and breaker testing, and UPS transfer time.
You can also simulate nonlinear rectified loads using the 63800’s RLC mode, which improves stability by detecting the impedance of the UUT (unit under test) and dynamically adjusting the load’s control bandwidth to ensure system stability. Other measurement functions allow you to monitor the output performance of the UUT. Additionally, voltage and current signals can be routed to an oscilloscope through analog outputs.
The instruments’ GPIB and RS-232 interface options enable remote control, while built-in digital outputs can be used to control external relays for short-circuit (crowbar) testing. A fan speed control ensures low acoustic noise.
Chroma Systems Solutions, www.chromausa.com
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