Commonly used neutral point grounding methods for power systems are: direct neutral grounding, neutral grounding, neutral grounding via arc suppression coil (resonant grounding), and neutral grounding via resistance grounding. The grounding operation mode of the power system involves many important aspects such as the safe operation of the power grid, the reliability of power supply, and the safety of the user. In the professional and technical aspects related to power systems, overvoltage and insulation coordination, relay protection, communication and automation, electromagnetic compatibility, grounding design and many other fields, is a wide-ranging system problem.
Transformer neutral point grounding resistance cabinet is a complete set of grounding equipment including grounding transformer. It can be installed in power plant power system, substation power supply system, industrial and mining enterprise power distribution system, and realize the neutral point resistance of these power grids. Grounded system operation mode.
JYR-20S Transformer Neutral Point Tester
The test items are required for 110kV/220kV substation acceptance and maintenance testing(with corresponding tester types):
Test Object |
Testing Item |
Tester Type |
|
Cable |
Cable AC Hipot Testing |
JYCX |
|
Cable Insulation Resistance Testing |
JYM KYORITSU |
||
Transformer |
Insulation Resistance of Winding |
JYM KYORITSU |
|
DC Leakage Testing in 1min |
JYDHV |
||
Winding Resistance Testing |
JYR50S |
||
Winding Deformation Testing |
JYP |
||
Turns Ratio Testing |
JYT-A |
||
AC Hipot Testing |
JYCX |
||
Short Circuit Impedance Testing |
JYW6300 |
||
Dan Delta Testing |
JYC |
||
Oil Breakdown Voltage (BDV)Testing |
JY6611 |
||
Oil Tan Delta Testing |
GTD-61A |
||
Switchgear |
Circuit Breaker/Disconnector Resistance |
JYL-200B |
|
Relay |
Relay Performance |
JY7003G |
|
On-load |
On-load Switchgear Testing |
JYK-I |
|
Tap Changer Dynamic Testing |
JYK-I |
||
Instrument Transformer |
Current Transformer (CT)Testing |
JYH-C |
|
Potential Transformer (PT)Testing |
JYH-C |
||
Surge Arrestor |
Zinc Oxide Characteristics Testing |
JY6800 |
|
1mA DC Reference Voltage |
JYDHV |
||
Capacitor |
Capacitor Current |
JY6700 |
|
Capacitor Inductance |
JY6700 |
||
Ground Grid |
Grounding Down Lead Earth |
JYD |
Related Articles:
What Test Items are Required for 110kV/220kV Substation Acceptance and Maintenance Testing?
What Tests Must be Done before the Transformer Leaves the Factory?
Main Factors Affecting the Operating Life of Transformers
What is the Purpose of Measuring the DC Resistance of the Transformer Winding?
Points to note in transformer oil breakdown voltage (BDV) test
DC winding resistance tester with 500 times tests on a single charge -JYR9310