1. AC, AC/DC Test Transformer: The power frequency power supply is input to the operation box (or operation console), and the voltage is adjusted by the auto-transformer and input to the primary winding of the test transformer. According to the principle of electromagnetic induction, power frequency high voltage can be obtained on the secondary (high voltage) winding. This power frequency high voltage can be rectified by high-voltage silicon stack and filtered by capacitor to obtain DC high voltage, whose amplitude is 1.4 times the effective value of the power frequency high voltage. However, when using DC, the short-circuit rod should be pulled out; when using AC, the short-circuit rod should be inserted. 2. Test transformer with taps: In order to resolve the contradiction between higher voltage with smaller current and lower voltage with larger current, the high-voltage winding is divided into two windings: one with larger current and the other with smaller current. The two windings are then connected in series and led out separately. Schematic diagram. 3. Cascade test transformer: To obtain a test transformer with higher voltage, the cascade method can also be used to achieve higher voltage. Figure 2 shows the principle wiring diagram of a three-stage cascade test transformer. The capacity and voltage relationship of the three transformers satisfies: P1=2P2=3P3, U(total)=1U+2U+3U.
(Select according to customer's own needs, not standard products)
1. Operating system:
XC series operation box: capacity: 1KVA – 5KVA, input voltage: 0.22KV.
TC series operation console: capacity: 10KVA – 300KVA, input voltage: 0.22KV, 0.38KV.
2. Protective digital microammeter MSA.
3. Resistive-capacitive AC/DC voltage divider RCF – 50, 100, 150, 200KV.
4. High-voltage DC discharge rod FZ – 70, 140, 210KV.
5. High-voltage silicon stack 2DL – 150, 300, 450KV.
6. Insulation support 50, 100, 200, 300KV.
7. High-voltage filter capacitor 0.01uF – 0.1uF, 40 – 100KV.
8. Grading ball.
9. Protective sphere gap Q – 50, 100, 150, 200, 250, 500.
10. Standard oil test cup 400ml.
11. Dielectric oil cup.
12. Folding trolley 150, 300 type.
13. Water resistor.
14. High-voltage voltage detector 10KV 35KV.
15. High-voltage phase identifier 10, 35, 110KV 220KV.
16. Various multimeters, megohmmeters and test leads.
