LRGBJ - ZHD Series
 LRGBJ - ZHD Series Current Transformers
40.5 to 252 kV
5 to 5000 A (8000 A on specific configurations)
Dealing with very high current involves a slightly different approach. The LRGBJ-ZHD Current Transformer's design has been further developed to process routine currents as high as 5000 A. On specific configurations this design can accommodate 8000 A
The ZHD series is actually a "2-CT-in-one" design. The top of the device is accepting the high current line, providing a transformation ratio of K1. The bottom of the product is a high voltage CT with a transformation ratio of K2 using the secondary current generated through K1. The final ratio of this Current Transformer is then K=K1*K2
This unique design allows a remarkable flexibility in dealing with very high current.
Specifications and Performance
- Rated primary voltage: 40.5 - 252 kV
- Rated primary current: >2500 A to 5000 A (up to 8000 A under specific conditions - please contact us)
- Rated secondary current: 5A, 1A
- Rated output 10-50VA
- Metering accuracy class: 0.2S, 0.2, 0.5S and 0.5 class
- Accuracy limit factor 5,10, 15, 20, 30, 40
- Protection accuracy class: 5P, 10P and TPY (additional classes on demand)
- Secondary cores: 1-8
LRGBJ series Current Transformers |
Accuracy Class |
0.2S, 0.2, 0.5S, 0.5 or 5P, 10P, TPY (for other classes, please contact us) |
Rated Current |
> 2500 A to 5000 A (up to 8000 A under specific conditions) |
Ambient
Temperature |
+45 ° C (113 ° F) to –50 ° C (-58 ° F) |
Insulation Level
(kV) |
252 kV rated: 460/1050/1200
126 kV rated: 230/550/630 |
Partial Discharge
Level |
<5 pC |
Standards
All products comply with IEC-60044-1 ”Current Transformers” and IEEE C57.13 standards
Protective class current transformers comply with IEC-44-6:”Requirements for Protective Current Transformers for Transient Performance”
Maintenance
No maintenance is needed on our Current Transformers
Option: A simple monitoring feature of tanδ is proposed as an option for yearly monitoring of equipment.
Reminder: for electrical safety reasons, secondary circuits should not be opened during operation of any Current Transformer.
Inquiry Check List
When placing an order, customer's specification needs to include:
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Reference Standard |
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Rated voltage |
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Rated current |
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Rated frequency |
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Rated transformation ratio |
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Number of secondary windings |
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Rated output |
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Accuracy class(es) |
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Accuracy limit factor |
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Instrument security factor |
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Environmental Conditions (Altitude, Pollution Class) |
If users have specific requirements, custom designs are available upon request.
Dimensions
LRGBJ-ZHD 220
Model Reference |
Rated
Voltage (kV) |
Rated Current
(A) |
Creepage
Distance
(mm) |
Weight
(kg/lbs) |
| LRGBJ - ZHD - 126 / 6000 |
126 |
5000~6000 |
3200 |
650/1433 |
| LRGBJ - ZHD - 252 / 6000 |
252 |
5000~6000 |
6300 |
1200/2646 |
| LRGBJ - ZHD - 72 / 6000 |
72 |
5000~6000 |
1925 |
400/882 |
| LRGBJ - ZHD - 40.5 / 6000 |
40.5 |
5000~6000 |
1015 |
200/441 |
More Information
To view our technical papers, click here:
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