·Chinese    
 
·Innovation Award
SF6 Electrical Equipment Gas Detector
SF6 Density Meter Calibrating Device
SF6 Leak Detector
Two Cases of SF6 CT Faults Detection Report
500KV Tank Lighting Arrestor Fault Detected by Our Compnay in Huanghua Power Plant
Inspection Report on 330KV GIS Fault in Weinan Substation in Shanxi Province
News Articles >> Two Cases of SF6 CT Faults Detection Report                         AddTime:2009-7-15
      
 
 
Two Cases of SF"CT" Faults Detection Report
 
Reported by: Sichuang Electrical Power Research Institute
Detected by: Zhang Li, Wang Kai
Audited by: Tang Ping
 
Date: Jan. 13, 2009
 
There were two successive SF6 CT incidents in the mid-December in Sichuang Grid, our engineers used JH3000-2 to detect faults, they located the fault place quickly according to detection data, the facts matched the detection diagnosis, pls. see details below.

1. 500KV 5063 CT Phase A Fault at Tanjiawan Substation of Deyang Power Supply Bureau

On Dec. 12, 2008, 500KV 5063 CT Phase A had earth short circuit failure, the circuit breaker tripped off while switched on in a second then tripped off in 8 seconds again. The circuit breaker brand is ABB. Pls. see detection data as below:
 
Detection date: Dec. 14, 2008

Equipment
Phase
SO2 +SOF2
H2S
CO
Diagnosis
5063 CT
A
110
70.2
4.8
High content of decomposition products, there is solid insulation material decomposition, turn off the power and check a.s.a.p.
B
0
0
2.0
Normal
C
0
0
1.3
Normal


2. 220KV 264 Lower CT Phase B Fault at Jiuli Substation of Leshan Power Supply Bureau

On Dec. 18, 2008, 200KV 264 lower CT Phase B had off and on current fault by two times, then the equipment was turned off. The detection data was as below:
 
Detection date: Dec. 14, 2008

Equipment
Phase
SO2 +SOF2
H2S
CO
Diagnosis
264 lower CT
A
0
0
9.6
Normal
B
0.99
0.12
72.7
High content of decomposition products, there is solid insulation material decomposition.

 

 

 
     
     
 

 

 

 
 
 
 
                      
 
     
 

 

 

 
   

 

    

 

  

 

 

 

 

  

 

 

 



Large middle Small】 【Print】 【Return
 
sate grid bid 
chinainfoseek  
power equipment 
equipment diagnostic  
high voltage appraturs 
 
Add:Floor 3,Gaoxing Electric Power Building,Cangshan Science & Technology Zone,Fuzhou,Fujian,China
P.C:350026  Tel:0591-83302478  83537715  Fax:0591-83302648