JK300-20SJK300-40S DC Resistance Tester

The JK300-20S/JK300-40S DC resistance tester is used for measuring the DC resistance of transformer temperature rise tests. It outputs a high voltage of DC40V and meets the requirement of simultaneous measurement of high and low voltage during temperature rise tests.
Main functions and features:
1. The instrument has a high output current and a voltage of up to 40V.
2. Dual channel measurement, simultaneously measuring high and low voltage resistance values.
3. Equipped with complete protection circuits and strong reliability.
4. Horizontal structure, convenient for on-site operation in transformer factories.
5. Equipped with sound discharge alarm, clear discharge indication, and reduced misoperation.
6. Equipped with timed printing and output function, it can meet the requirements of temperature rise curve testing.
Main technical indicators:
1. Output current: JKR400S: 40A, 20A, 10A, 5A
JKR20S：20A、10A、5 A、2.5 A
2. Test range: 40A: 50 μ Ω～ 1 Ω 20A: 100 μ Ω～ 2 Ω
10A：500μΩ～4Ω5 A：1mΩ～8Ω
2.5 A：2mΩ～16Ω
3. Resolution: up to 0.1 μ Ω
4. Test accuracy: 0.2%
5. Dimensions: 420 × 500 × 180 (mm)
6. Working temperature: -20 ℃~40 ℃
7. Working humidity:<80% RH, no condensation
8. Working voltage: AC220V ± 10%
9. Working frequency: 50Hz