Profile:
The "KDZR-ZH" comprehensive tester for direct resistance transformation ratio of distribution transformers is an efficient and convenient testing equipment designed specifically for maintenance, repair, and troubleshooting of distribution transformers in power systems. The following is an introduction to the main features and functions of the device:
main features
2-in-1 function: This tester integrates two functions: DC resistance testing and transformer ratio testing, which can complete the testing of these two key indicators of distribution transformers at once. This not only improves work efficiency, but also simplifies the operation process.
Strong portability: Due to the use of large capacity lithium batteries for power supply, the "KDZR-ZH" has good portability and is very suitable for on-site use, especially in environments without stable external power supply.
Easy to operate: Users do not need to frequently connect and disconnect the testing line, reducing operational complexity and making the testing process smoother and faster.
Accurate measurement: The equipment provides high-precision test results to ensure accurate assessment of the status of distribution transformers, which helps to detect potential problems in a timely manner.
Application scenarios
Regular inspection: used for regular health checks of distribution transformers in operation to ensure their normal functioning.
Acceptance after new installation or maintenance: Verify whether the newly installed or repaired distribution transformer meets the requirements and ensures safe grid connected operation.
Troubleshooting: Quickly locate problems with distribution transformers, such as winding short circuits or open circuits, and guide repair work.
Expansion or renovation of power system: Ensure that newly added distribution transformers meet the system requirements during the expansion or renovation of the power system.
summarize
Features:
Main functions and features
1. One wiring can complete direct resistance testing and variable ratio testing.
2. The direct resistance testing function can be used to test Yn, Y, and △ windings using three-phase automatic mode, and calculate the three-phase unbalance rate; The maximum output current is 20A, which can meet the testing of extremely low resistance of low-voltage coils in distribution network transformers.
3. Variable ratio testing function, with testing functions for three-phase, single-phase, and Z-type transformers; PT/CT ratio and polarity testing functions; Blind testing function.
4. It has multiple wired and wireless communication interfaces, which facilitate the expansion of instrument functions.
5. The instrument adopts an embedded Linux operating system, which has high security, smoothness, and ease of use.
6. The instrument adopts an A7+M4 dual core architecture, which meets both real-time measurement and smooth operation requirements.
7. Industrial grade 7-inch large screen display, with a fresh and simple display style design, creating a comfortable and convenient human-computer interaction experience for you.
8. This instrument is powered by a large capacity lithium battery and comes with a built-in charger.
Parameter:
Specification
Direct resistance test
Output current: 20A, 10A, 5A, 1A, 0.1A, ≤ 10mA
Measurement range:
20A gear 0.5m Ω~100m Ω;
10A gear 1.0m Ω~300m Ω;
5A gear: 10 m Ω~1.0 Ω;
1A gear: 200m Ω~6.0 Ω;
0.1A gear: 2.0 Ω~60 Ω;
≤ 10mA range: 30 Ω～ 50 k Ω
Accuracy: ± (reading x 0.2%+2 words)
Variable ratio test
Measurement range: 0.9 to 10000
Accuracy:
± (reading x 0.1%+2 words) (less than or equal to 500)
± (reading x 0.2%+2 words) (greater than 500 but less than or equal to 3000)
± (reading x 0.3%+2 words) (greater than 3000)
resolving power:
0.9～9.9999(0.0001)
10～99.999(0.001)
100～999.99(0.01)
10000 and above (1)
Usage conditions and appearance
Working power supply: built-in lithium battery, capacity 7.8AH
Charging voltage: AC220V
Operating temperature: -10 ℃ to 50 ℃
Relative temperature: ≤ 90%, no condensation
Weight/Size: 6.5kg/318 × 280 × 204mm
