JH79—640 kW High-Power Programmable DC Electronic Load—Technical Specification Sheet, September 15, 2024
The JH79 series is a regenerative, programmable DC electronic load. In addition to the conventional dissipative‑load functionality, it cleanly feeds the energy dissipated by the load back into the grid, thereby achieving energy savings. It is widely used for testing new‑energy equipment, discharging lithium‑ion, fuel‑cell, and other types of batteries, in automated test systems, and for evaluating unidirectional modules such as AC/DC and DC/DC converters, as well as for burn‑in testing. The instrument features a rich array of communication and programming interfaces, along with a color display and multiple text‑based menu options, offering intuitive and user‑friendly operation. It is a standard piece of equipment across industries including power electronics, new energy, sensors, motor drives, and system integration.
- Product Description
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I. Brief Overview
The JH79 series is a regenerative, programmable DC electronic load. In addition to the conventional dissipative‑load functionality, it cleanly feeds the energy dissipated by the load back into the grid, thereby achieving energy savings. It is widely used for testing new‑energy equipment, discharging lithium‑ion, fuel‑cell, and other types of batteries, in automated test systems, and for evaluating unidirectional modules such as AC/DC and DC/DC converters, as well as for burn‑in testing. The instrument features a rich array of communication and programming interfaces, along with a color display and multiple text‑based menu options, offering intuitive and user‑friendly operation. It is a standard piece of equipment in industries including power electronics, new energy, sensors, motor drives, and system integration.
II. Characteristics
● Sampling rate up to 500 kHz
● Transmits voltage and current sampling data to the host computer at rates of up to 1 kHz.
● Supports master/slave parallel operation, with power ratings up to 640 kW.
● Load modes: CC, CV, CR, CP, CV+CC, CR+CC, CP+CC
● Short-circuit simulation, with instantaneous power doubled
● 50 sequence files, each with 100 steps, supporting linking and looping
● 50 automatic programs, each with 20 steps, supporting intelligent start-up.
● Features OCP, OPP, LED simulation, load‑effect testing, battery internal resistance measurement, and battery discharge testing.
● Time measurement, (Vpk+/-) measurement function
● Multi‑faceted protection features including OVP, OCP, OPP, and OTP
● Remote Voltage Compensation
● Color LCD display, supports Chinese and English
● RS232, LAN, GPIB, RS485, and CAN communication interfaces
● SCPI and Modbus communication protocols
● Energy regeneration: returns the energy consumed by the load to the power grid.
III. Application Areas
● Energy storage and microgrid equipment manufacturing and development.
● Server power supplies, UPS systems, and inverter manufacturing and development
● Solar battery arrays and wind power generation applications.
● Applications of fuel cells, power batteries, lead-acid batteries, and supercapacitors
● Aerospace, railway, new-energy vehicles, and motor‑drive testing applications
Unmanned aerial vehicles, lasers, and sensor applications. IV. Main Technical Parameters
Indicator item
Indicator parameters
Output Power Specifications
AC 380 V ±10% / 50 Hz
Rated output current (per phase)
980A
Rated output power
600kW
Maximum efficiency
>92%
DC-side voltage
Constant Voltage Range
50V~700V
Minimum discharge voltage
50V
Precision
±0.01% of FS
Stability
±0.01% of FS
DC-side current
Output range per channel
1A~700A
Precision
±0.01% of FS
Constant-voltage cutoff current
1A
Stability
±0.01% of FS
DC-side power
Maximum power per channel
640kW
Stability
±0.1% of FS
Time
Current response time
5 ms (+10% ~ +90%)
Protection
Safety protection conditions can be configured, with parameters including: voltage upper limit, voltage lower limit, current upper limit, over-temperature protection, and more.
Channel Characteristics
The constant-current source and the constant-voltage source employ a dual-loop structure.
Energy feedback
The discharge energy can be fed back into the power grid.
Channel Control Mode
Independent control
Noise
<75dB
Host computer communication method
TCP/IP (remotely controllable)
Number of main channels per unit
1
Operating temperature range
-20°C to 50°C (no derating below 40°C; derating to 90% at 45°C; derating to 80% at 50°C)
Storage temperature range
-25℃ to 50℃
Relative humidity range of the working environment
≤70% RH (no condensation)
Storage ambient relative humidity range
≤80% RH (no condensation)
External dimensions (W × H × D mm)
1350×1980×1100
Weight
1200kg
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Huizhou Jinghui Instrument and Equipment Co., Ltd.
Service Hotline:400-1331-882
No. 13, Jinda Road, Huinan Science and Technology Park, Huizhou City, Guangdong Province
E-mail:jh@jhyq.com
