1.Description:
A generator is tested several times throughout its lifetime - after being manufactured, once installed onsite, during periodic maintenance checks, etc.
One of the more important tests to a generator coil is the AC Withstand test. Only this test, using AC high voltage, can truly verify the integrity of the coils as they are stressed under operating conditions.
In addition to the AC Withstand, Diagnostic testing is also performed, namely Tan Delta/Power Factor and Partial Discharge testing.
2.APT Power Technologies Products lines
APT Power technologies offers wider range of motor generator testing equipment on the market around the world. Including AC resonant test systems with variable inductance, HV variable reactors, capacitance & Tan Delta measuring equipment, etc. Many famous companies are APT Power Technologies customers, such as GE Renewable Energy, Alston, ANDRITZ HYDRO; Below are the most in-demand products.
2.1 AC Hipot Test Equipment on power generators
AC withstand test, is also called AC Hipot test. The test involves applying AC voltage to a winding to verify if it can withstand an applied voltage.
APT Power technologies realizes that the needs of our customers are much different from each other. We try to provide wider range products and customized designs to meet our client individuation demands.
AC Resonant Test Systems with variable Inductance | Metal Tank | Cylinder type |
Two Voltage Taps | Not recommended | |
PD level up to 5pc | PD level about 30pc | |
Ideal sinusoidal high voltage | Ideal sinusoidal high voltage | |
Containerized design | Containerized design | |
Both manufacturers and site | Only on-site recommended | |
Variable Shunt Reactors | Distorted high voltage due to phase shift | |
Tan Delta testing, moderate | ||
PD testing, not recommended | ||
To perform generator AC Hipot testing, APT Power technologie gives priority to recommend AC Resonant Test Systems with variable inductance, metal tank. Actually, They are just like APT Power technologie for HIGHVOLT, Haefely Hipotronic and Phenix Technologies.
If you are interested in relevant topics below, please download our Application Guide-Generator Winding Hipot Testing & Diagnosis" for details; Or contact APT Power technologie to discuss your demand.
Why AC Resonant Test Systems with variable inductance, metal tank is recommended?
What is the difference between series and parallel resonant test systems for generator Hipot testing?
FAQs about AC Hipot testing for generators, its test voltage, test current, test frequency, and test circuit , etc.
2.2 Generator Winding Qualitative Diagnosis
Generally, Tan Delta/Power Factor and Partial Discharge are performed for generators diagnostic testing. Different from AC Hipot testing, Tan Delta/Power Factor and Partial Discharge are “non-destructive” test.
2.2.1 Tan Delta/Power Factor Testing
Electrical insulation of generators undergo aging processes due to thermal overload, mechanical stress, electrical impurity and environmental factors.
Taking Capacitance and Tan δ measurements is an effective means to trace the integrity of generator insulation.
APT Power Technologies offers two measuring bridges to perform generator's Tan Delta/Power Factor testing. Versatile 9208 and prestigious DF902A.
9208 | DF902A | |
Accuracy | 0.5% | 1.0% |
Cx range | 2pF～6uF/10KV | 3pF-60000pF/12KV |
Test Voltage at GST | No limited | ≤12KV |
Test Voltage at GST | ≤20A, Ordering for＞20A | ≤5A |
External AC Hipot | Required | Required |
Standard Capacitor | Required | No need |
Different Voltages Measured | Up to 20 | Only one |
Shielding circulating water additional capacitance at GST | Yes | No available |
Software | Operated by laptop | Operated by laptop |
If you are interested in relevant topics below, please download our Application Guide-Generator Winding Hipot Testing & Diagnosis" for details; Or contact APT Power technologies to discuss your demand.
What is rating requited of AC Hipot for generator Tan Delta/Power Factor Testing ?
How to judge the result of Tan Delta test?
FAQs about Tan Delta/Power Factor Testing for generators, its test voltage, test current, test frequency, etc.
2.2.2 Partial Discharge testing
PD testing is another diagnostic testing to verify the generator integrity.
APT Power Technologies recommends AC resonant test systems with inductance to be as its external HV power supply.
APT Power Technologies AC resonant test systems with variable inductance, metal tank its PD level could be controlled at 5pc. it is completely meet requirements of generator PD testing.
As to PD analyzer, you can choose APT Power Technologies Model PDA-2P. You also could choose other brand, such as MPD800, Omicron.
2-Chanel Digital PD analyzer, Model PDA-2P
3. APT Power Technologies Relevant Solution and Products
Water-cooled generator stator winding DC Hipot and Diagnosis Testing with cooling water inside
Related Solution:
STATOR WINDING DC HIPOT AND DIAGNOSIS TESTING
AC Resonant Test System with Variable Inductance, Metal tank, Two Voltage Taps, PD level 5 pc; Containerized design
Related products:
SERIES RESONANT TEST SYSTEM FOR GENERATORS
Variable shunt Inductance, Metal tank
Related products:
1650KVA/50KV VARIABLE SHUNT REACTOR-DK1650
Wider range Tan Delta/Power Factor measuring bridge, Type 9208
Related products:
SPECIFICATIONS HIGH VOLTAGE SCHERING BRIDGE TYPE 9208
comments
LEAVE A COMMENT