KEMA Tested & ISO 9001/14001 Certified Manufacturing| Exporting to 50+ Countries (IEC 61869-3 / IEEE C57.13)
24/7 Global Engineering Hotline: 86 18852046268|sales@potentialtransformers.com

Potential Transformers
& Power VTs

B2B
HomeProductsAI SpecAboutBlogContact

Mainland China

Mainland China中文

United States

United StatesEnglish

France

FranceFrançais

International Accreditation & Testing

Certified by KEMA Labs (Netherlands), CESI, and CNAS National HV Testing Facility

IEC 61869-3IEEE C57.13KEMA TYPE TESTEDISO 9001:2015ISO 14001:2015CE CERTIFIED
PotentialTransformers.com

Global B2B High Voltage Transformer Portal

PotentialTransformers.com is a leading international OEM & EPC supplier specializing in high-voltage potential transformers (3.3kV to 500kV), capacitive VTs (CVT), cast-resin dry transformers, and SF6 gas-insulated VTs for global power utilities, substations, and heavy industrials.

100% Factory Partial Discharge Tested

Follow Us & Social Channels

FacebookLinkedInYouTubeInstagramTikTok

Product Categories

  • Voltage Transformers (VT / PT)
  • Current Transformers (CT)
  • Power Step-Down Transformers

Engineering Tools

  • AI Spec & Selection Studio
  • Electromagnetic PT vs. Capacitive CVT: Selection Guide for 110kV–500kV Substations
  • Understanding IEC 61869-3: Accuracy Classes, Burdens, and Temperature Rise Limits
  • High Voltage Faraday Lab Testing
  • Request Technical Datasheets

Global Support

  • Room 1602, 16/F, Wing On Centre, 111 Connaught Road Central, Sheung Wan, Central & Western District, Hong Kong
  • 86 18852046268
  • sales@potentialtransformers.com
  • Regional Hubs: Dubai, UAE | Frankfurt, Germany | Houston, USA

© 2026 PotentialTransformers.com. All Rights Reserved. Engineered for Global High-Voltage Grids.

IEC 61869-3 CompliantIEEE C57.13 CompliantKEMA Type Tested
HomeProductsCurrent TransformerCGIS6508
CGIS6508 Current Transformer for Inflatable Switchgear
35kVCGIS6508
Winding & Schematic TopologyInternal Wiring Diagram
Primary Winding (P1 - P2):Series-connected in the line / through-core — 35kV
Secondary Metering (1S1 - 1S2): ()
Secondary Protection (2S1 - 2S2):Protection winding (when fitted)
Safety Warning:Never open-circuit the secondary while energized — dangerous voltage
Current Transformer IEC 61869-3 Certified
Model Ref:CGIS6508

CGIS6508 Current Transformer for Inflatable Switchgear

Professional current transformer dedicated to CGIS inflatable switchgear with multiple accuracy grades and rich primary current specifications; secondary lead length and stacked mounting height support customized production.

Key Engineering Advantages

  • Multi-grade precision optional; coil-quantity-based height adjustment; customizable secondary lead parameters
Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS6508

Electrical Parameters

Primary Rated Voltage (Un):35kV
Secondary Winding Voltages:
Metering & Protection Class:
Rated Output Burden:
Rated Frequency:50/60Hz

Insulation & Withstand Ratings

Insulation System:Dry Epoxy Resin
Insulation Level (BIL):
Partial Discharge Level:< 5 pC at 1.2 Un
Environmental Class:
Standards Conformance:

Recommended Deployment Environments

GEO · Engineering Decision Support

Global Engineering Overview

9-Module selection guide
missing data = [On Request]

Product Decision Island

CGIS6508 is a dry epoxy resin current transformer for 35kV inflatable switchgear, offering multi-grade accuracy and customizable secondary leads.

Comprehensive Spec Matrix

ParameterSpecificationVerification
Product TypeCurrent Transformer[On Request]
Model CodeCGIS6508Factory nameplate marking
Primary Voltage35kVRated voltage test (IEC 61869-1/3)
Secondary Voltage[On Request]Ratio check at rated frequency
Accuracy Class[On Request]Accuracy test (IEC 61869-2 / IEEE C57.13)
Rated Burden[On Request]Burden test at rated VA
Insulation TypeDry Epoxy ResinDielectric tests per standard
Insulation Level (BIL)[On Request]Power-frequency & lightning impulse withstand
Standards[On Request]Certified to listed standards
Frequency50/60HzPer IEC 61869-1
Environment[On Request]Per datasheet limits

Fit & Unfit Boundaries

Ideal For

  • Indoor RMU (Ring Main Unit) applications
  • CGIS (Cubicle Gas Insulated Switchgear) integration
  • Current measurement and protection in 35kV systems
  • Custom secondary lead lengths and stacked mounting heights

Not Recommended For

  • Outdoor substation installations
  • Voltage measurement or protection (PT applications)
  • High-accuracy metering requiring class 0.2S or better (unless specified)
  • Non-epoxy resin insulation environments

Topology & Wiring

Connect primary through the bushing; secondary terminals are 1S1/1S2 for the main winding, and 2S1/2S2 for the protection winding if present. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 for accuracy and burden.

Standards & Compliance

Compliant with: [On Request]

  • Type Test Report: [On Request]
  • Calibration Certificate: [On Request]

Burden & Error Calculation (IEEE C57.13)

S_total = ΣS_instrument + I₂² × (ρ × 2L / A)

  • If S_total < 0.25 × S_rated: add compensation burden to maintain accuracy.
  • If S_total > S_rated: accuracy class cannot be guaranteed.

Product FAQ

Q: What is the insulation type of CGIS6508?

A: Dry epoxy resin.

Q: What is the primary voltage rating?

A: 35kV.

Q: Can the secondary lead length be customized?

A: Yes, secondary lead parameters are customizable.

Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.

SPEC · TECHNICAL DATA

Technical Specifications

CGIS6508
9 cols · 36 rows

CGIS6508 Current Transformer — Technical Data

Accuracy classRated output (VA)750/51000/51500/52000/52500/53000/54000/5
0.2S FS10 0.2 FS10 0.5S FS10530303030252525
1040353030252525
1550403030302525
2060453030303030
2565503530303030
3070554035303030
0.5FS10530303030252525
1030303025252525
1535353025252525
2035353025252525
2540353530252525
3045404035302525
5P10 10P10530303025252525
1040303025252525
1545353030252525
2055404030302525
2560504530303025
3065555035303025
5P15 10P15540303030252525
1050353030252525
1565504035303025
2075604540303025
2590705045403530
3095806050454030
5P20 10P20550453535303030
1065554040353530
1585704545404035
20100805050454040
25120957055504540
301301058065555045
5P30 10P30575605550454540
10105806560555545
151301008070606050
201351209580706555
2515014010590757060
30160120100857565—
Engineering Drawing

Specification & Outline Drawing

Original image, not compressed
CGIS6508 specification drawing

Dimension & outline drawing of CGIS6508 — click image to zoom / view original.