The high-current temperature rise testing equipment can be classified according to the number of output current phases and functional purposes to adapt to different testing scenarios.
I. Classification by Output Current Phases
Single-phase high-current generator: mainly used for single-phase equipment testing or phase-by-phase testing, belonging to the basic type of current source.
Three-phase high-current generator: can more realistically simulate the actual operating conditions of three-phase balanced loads, suitable for temperature rise tests of three-phase switch cabinets, transformers, etc.
II. Classification by Function and Purpose
General temperature rise type: the core function is to provide adjustable high current, equipped with multiple-channel temperature inspection instruments, used for routine temperature rise tests of various electrical equipment such as switch cabinets, bus ducts, cables, etc.
Integrated protection characteristic type: integrates temperature rise test with protection characteristic verification functions, can simultaneously conduct temperature rise tests and tripping characteristic tests of circuit breakers, thermal relays.
Specialized and dedicated type: optimized for specific test objects, such as transient impulse type equipment specifically for fuse testing, thermal cycle test device for testing the performance of cables under cold and hot cycles.
High-current generator
Application: covers full-scenario testing from components to systems
High-current generators are important testing equipment in the fields of power, electrical manufacturing, and scientific research and quality inspection. They have a wide range of applications and main scenarios include:
Power system equipment: tests the thermal stability performance of transformers, switch equipment, power cables, current transformers, etc. under full-load or fault current.
Power electronics and motors: evaluates the temperature rise, efficiency, and power factor of inverters, inverters, and electric motors under high-current operation.
Basic materials and components: verifies the long-term current-carrying capacity of new materials such as copper-clad steel conductors, and conducts setting verification for current relays.
Complete sets of equipment: draws the overall temperature rise distribution map of complete sets of equipment such as JP cabinets (distribution transformer integrated distribution cabinets), wind turbine box transformers, etc., to ensure operational reliability in the field environment.
Selection: Five Core Reference Elements
When selecting equipment, key elements to focus on include:
Capacity and phases
Determine the equipment capacity based on the current requirements of the larger testing objects and reserve a certain margin. If the testing objects are mainly three-phase equipment, preferentially choose three-phase equipment to improve testing efficiency and result accuracy.
Accuracy and stability
High accuracy is the basis for effective test data, and attention should be paid to steady current accuracy, drift, temperature drift, etc., to determine the reliability of long-term testing. At the same time, it is recommended to select core components for current and temperature measurement with an accuracy of 0.2 grade or above.
Intelligence and automation
Equipment with an industrial control computer + PLC architecture that can achieve fully automatic closed-loop control, supports unmanned testing, significantly improving efficiency; equipped with an intuitive touch screen human-machine interface, can optimize the operation experience.
Safety protection mechanism
High-current testing has certain risks, the equipment should have dual protection mechanisms of electronic circuit rapid detection and mechanical limit, respond to overvoltage, overcurrent, overtemperature, phase loss, etc. in milliseconds to ensure personal and equipment safety.
Scalability
It is necessary to consider the equipment’s ability to adapt to future needs, such as whether the temperature collection channels support later expansion, whether the software supports free upgrades, and whether it can be customized with testing modules according to new standards.
Post time: Mar-11-2026