Transformer Megger Test
The megger has three terminal posts: one for "L", one for "E" and one for "G" (shield). L is connected to the wires, E is connected to the cable, and the "G" is attached to the insulated paper of the cable. The following points should be noted when measuring:
- The power must be cut off first.
- The megger must be kept flat when used.
- Before we use the megger, we need to rotate several times to see whether the pointer is at the largest location. Then we will short-circuit the two terminals of "L" and "E", then slowly turn the hand of mega ohmmeter to see whether the pointer is at zero.
- The megger cable must be insulated well, and the two lines shall not be twisted together.
- When measuring the megger, the reading should be based on the number after a minute of rotation.
- During the measurement, the number of meters should be transferred to 120 revolutions per minute.
- The megger has a range of several thousand megaohm, with a minimum scale of about 1 trillion euro, which is not suitable for measuring the resistance below 100 kiloohm.
Oil Immersed Transformer
Oil-Immersed Amorphous Alloy Transformer
- S9 Type 10kv Series Sealed Tank Distribution Transformer
- S9-M Type 10kv Series Sealed Tank Distribution Transformer
- S11 Type 10kv Series Low Loss Distribution Transformer
- 11kv Series Oil-immersed Distribution Transformer
- S13-M Type 10kv Series Low Loss Distribution Transformer
- S15-M Type Oil-Immersed Amorphous Alloy Distribution Transformer
- 20kv Series Oil-immersed Distribution Transformer
- 33kv Series Oil-immersed Distribution Transformer
- 33/11kv Series Power Transformer
- Oil Immersed One Load Regulating( OLTC ) Transformer
- Oil-Immersed Amorphous Alloy Transformer
- Dry Type Transformer
- Mini Substation