Profile:
KDRB-ZH integrates four important transformer tests into a portable system powered by a high-capacity lithium battery. The system utilizes an embedded Linux operating system and an A7+M4 dual-core architecture, equipped with a 7-inch touchscreen, and can perform DC resistance testing (maximum 20A), turns ratio testing (0.9-10000), energy efficiency rating analysis (30-65000kVA), and insulation resistance testing (5000V). This four-in-one design enables efficient and comprehensive transformer diagnostics without the need for multiple instruments and conductor changes.
Features:
1. Single connection completes DC resistance and turns ratio testing without wire replacement;
2. DC Resistance: Automatic testing of Yn/Y/Δ windings with unbalance calculation; 20A output for low-voltage coil testing;
3. Turns Ratio: Supports three-phase, single-phase, and Z-type transformers; PT/CT ratio/polarity; blind test function;
4. Energy Efficiency: Capacity, load, no-load, and zero-sequence impedance tests are accurately graded according to GB20052-2020;
5. Insulation Resistance: 5000V output, adjustable short-circuit current 1-5mA; IR, DAR, and PI testing functions;
6. Multiple wired/wireless communication interfaces for easy function expansion;
7. Embedded Linux operating system enhances security, smoothness, and ease of use;
8. A7+M4 dual-core architecture ensures real-time measurement and smooth operation;
9. Industrial-grade 7-inch touchscreen with a simple design, one-button operation, and comfortable interaction;
10. Equipped with a high-capacity 11AH lithium battery and a built-in charger, suitable for extended outdoor use.
Parameter:
Direct resistance test
Output current: 20A, 10A, 5A, 1A, 0.1A, ≤ 10mA
Measurement range:
20 A gear 0.5m Ω～ 100m Ω 10 A 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 gear 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) 1000～9999.9(0.1)
10000 and above (1)
Capacity and empty load testing
Measurement range:
Voltage AC 50V~850V
Current AC 0.5A~100A
Capacity 30kVA~65000kVA
Accuracy:
Voltage and current: ± (reading x 0.2%+2 words)
Power (0.2 ≤ cos π≤ 1): ± (reading x 1.0%+2 words)
Capacity: ± (reading x 10%+2 words)
Insulation resistance test
Output voltage: 500V, 1000V, 2500, 5000V optional
Short circuit current: 1mA~5mA optional
Current testing range: 10mA
Accuracy of current testing: ± (reading × 5%+0.2nA)
Capacitance test range: 20 μ F
Accuracy of capacitance test: ± (reading × 15%+0.03nA)
Capacitor discharge rate: from 10000V to 10V, 0.5s/μ F
Usage conditions and appearance
Working power supply: built-in lithium battery, capacity 11AH
Charging voltage: AC220V
Operating temperature: -10 ℃ to 50 ℃
Relative temperature: ≤ 90%, no condensation
Weight: 12kg
Size: 438 × 318 × 190 (mm)
