Reference Standard
GB 20840.1 “Mutual Instrument Part 1: General Technical Requirements”
GB 20840.2-2010 “Mutual Instrument Part 2: General Technical Requirements”
IEC61869-1:2007
IEC61869-2:2012
LGB-35~220KV Dry Type Capacitor Current Transformer
The current transformer consists of main components such as current carrier, capacitor core, outer sheath, umbrella skirt, secondary winding, bottom box, and end structure. The bottom box is equipped with measuring terminals, which should be opened for use when measuring partial discharge and dielectric loss factor. It should be reliably grounded during normal operation.
Product Model
LGB-1
L: Current transformer G: Dry insulation B: Protected winding Where: 1: Rated voltage, unit: kV
Product Features
Dry capacitor type insulation, oil-free, airless and porcelain-free
High anti-pollution level
Maintenance-free
Conditions of use
Ambient temperature: -50℃~+50℃
Altitude: The standard design is 1000m. When it exceeds 1000m,
According to GB 311 for correction
· Pollution level:
Level IV or Level III (default, equivalent to porcelain level IV)
Main performance indicators
· Rated voltage: 35kV, 66kV, 110kV, 220kV
· Rated primary current: ≤8000A
· Insulation level: (see the table below)
· Temperature rise: not more than 85K
· Rated secondary current: 5A, or 1A
· Rated capacity: ≤100VA
· Measurement winding accuracy: 0.5, 0.5S, 0.2, 0.2S
·Protection winding accuracy level: 5P, 10P, 5PR, 10PR, TPY, etc.
Electrical Test
60s power frequency tolerance, partial discharge test, dielectric loss and capacitance, error test, volt-ampere characteristic test, polarity test, open circuit voltage test, etc.
Operation and maintenance
Maintenance-free
Ordering Instructions
·The rated voltage, rated current, number of secondary windings and their performance parameters (such as rated current ratio, winding accuracy level, rated load, etc.) must be provided.
·For protection windings, the accuracy limit coefficient must also be provided.
·For TPY-level protection windings, the working cycle, short-circuit coefficient, accuracy retention time, etc. must also be provided.
Current Transformer Project
126KV Current Transformers in Operation in Yiwu, Zhejiang
FRP Dry-type Transformer Bushings and Dry-Type Current Transformers Were Put into Operation at the ZhangBei Alibaba Project
252KV Current Transformers in Operation in Yixian, Jinzhou
