Chroma 63800 Series AC and DC Electronic Load

Key Features

• Power Rating: 1800W, 3600W, 4500W
• Voltage Range: 50V ~ 350Vrms
• Current Range: Up to 18Arms, 36Arms, 45Arms
• Peak Current: Up to 54A, 108A, 135A
• Parallel/3-Phase Function
• Frequency Range: 45 ~ 440Hz, DC
• Crest Factor Range: 1.414 ~ 5.0
• Power Factor Range: 0 ~ 1 lead or lag (Rectified mode)
• CC, CR, CV, CP for DC Loading
• Constant & Rectified Load Modes for AC Loading
• Analog Voltage & Current Monitor
• Timing Measurement for Battery, UPS, Fuse and Breaker tests
• Measurement: V, I, PF, CF, P, Q, S, F, R, Ip+/- and THDv
• Short circuit simulation
• Full Protection: OC, OP, OT protection and OV alarm
• Chroma's 63800 Series AC&DC Electronic Loads are design for testing uninterruptible power supplies(UPS), Off-Grid Inverters, AC sources and other power devices such as switches, circuit breakers, fuses and connectors.

The Chroma 63800 Loads can simulate load conditions under high crest factor and varying power factors with real time compensation even when the voltage waveform is distorted. This special feature provides real world simulation capability and prevents overstressing thereby giving reliable and unbiased test results.

The 63800's state of the art design uses DSP technology to simulate non-linear rectified loads with its unique RLC operation mode. This mode improves stability by detecting the impedance of the UUT and dynamically adjusting the load's control bandwidth to ensure system stability.

Comprehensive measurements allow users to monitor the output performance of the UUT. Additionally, voltage & current signals can be routed to an oscilloscope through analog outputs. The instrument's GPIB/RS232 interface options provide remote control & monitor for system integration. Built-in digital outputs may also be used to control external relays for short circuit (crowbar) testing.

Chroma's 63800 Loads feature fan speed control ensuring low acoustic noise. The diagnosis/protection functions include selfdiagnosis routines and protection against overpower, over-current, over-voltage and overtemperature.

Complete AC & DC Load Simulations
Chroma's 63800 AC & DC Electronic Load is designed for both AC & DC Load Simulations. Illustrated below are the various load modes which are available:

AC Load Simulation
The Model 63800 AC & DC Electronic Load provides two unique operating modes for AC load simulation: Constant Load Modes and Rectified AC Load Modes. Each are described below.

Constant Load Modes
The Constant Load Modes allow users to set the following operating modes: CC, CR and CP mode. The CC & CP modes in this category allow users to program PF or CF, or both. For CR mode the PF is always set to 1.

Rectied AC Load Modes
The 63800 AC/DC Electronic Load provides unique capability to simulate non-linear rectified loads for a wide range of testing applications. There are three load modes available for rectified load simulations: RLC, CP and Inrush Current.

DC Load Simulation
Chroma's 63800 DC load simulation includes four load modes : constant current, constant resistance, constant voltage and constant power as depicted below.

CC, CR, CP mode can be used for regulated voltage power supply testing. For battery charger, CV mode may help to check its current regulation. Many inverter designs, although its input is DC, show an input current and will show rectified pattern. This unique load mode makes the Chroma 63800 load ideal for Fuel Cell, PV module/array and Battery testing.

Comprehensive Measurements
Chroma's 63800 Series AC & DC Electronic Loads include built-in 16-bits precision measurement circuits to measure the steady-state and transient responses for true RMS voltage, true RMS current, true power(P), apparent power(S), reactive power(Q), crest factor, power factor, THDv and peak repetitive current. In additional to these discrete measurements, two analog outputs, one for voltage and one for current, are provided as a convenient means of monitoring these signals via an external oscilloscope.

Timing Measurement
Timing parameters are critical to many products such as UPS's Breakers and Fuses. The 63800 AC & DC Load also includes a unique timing and measurement function to measure the trip time of fuses & circuit breakers or the transfer time for UPS's (Off-Line).