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CGIS7515S Current Transformer for Inflatable Switchgear

35kVCGIS7515S

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:CGIS7515S

CGIS7515S Current Transformer for Inflatable Switchgear

Three-phase integrated current transformer for CGIS inflatable switchgear, multiple accuracy grades and wide primary current range available; secondary lead specifications and stacked product height support customized production.

Key Engineering Advantages

Three-phase integrated structure
independent dimension design
customizable outgoing wire parameters

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS7515S

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

Suitable for 35kV CGIS inflatable switchgear applications requiring three-phase integrated current measurement with customizable secondary leads.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS7515S	Factory nameplate marking
Primary Voltage	35kV	Rated 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 Type	Dry Epoxy Resin	Dielectric tests per standard
Insulation Level (BIL)	[On Request]	Power-frequency & lightning impulse withstand
Standards	[On Request]	Certified to listed standards
Frequency	50/60Hz	Per IEC 61869-1
Environment	[On Request]	Per datasheet limits

Fit & Unfit Boundaries

Ideal For

35kV ring main unit (RMU) applications
Indoor GIS or CGIS switchgear installations
Three-phase current measurement and protection
Custom secondary lead configurations

Not Recommended For

Outdoor substation installations
Voltage measurement applications
Low voltage (<1kV) systems
High accuracy metering requiring class 0.2S (if not specified)

Topology & Wiring

For current transformers, adhere to IEC 61869-2 terminal markings: primary terminals P1/P2, secondary terminals 1S1/1S2 for the main winding, and 2S1/2S2 for protection winding if present. Never open-circuit the secondary of a CT while energized - hazardous voltage may occur. Ground the secondary circuit at one point only. Ensure secondary terminals are shorted before removing the CT from service.

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 primary voltage rating of this CT?

A: The primary voltage rating is 35kV.

Q: Can this CT be used for outdoor applications?

A: No, it is designed for indoor CGIS inflatable switchgear.

Q: Is the secondary lead length customizable?

A: Yes, secondary lead specifications support customized production.

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

CGIS7515S
9 cols · 30 rows

CGIS7515S, 9817S, 1021S Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy classCombined	Rated primary current (A)	200	300	400	500	600	700	800
0.2/5P10	2.5	30	40	50	60	70	80	90
0.2/5P10	5	60	80	100	120	140	160	180
0.2/5P10	10	85	70	85	100	115	130	150
0.2/5P10	15	85	70	85	100	115	130	150
0.2/5P10	20	105	70	85	100	115	130	150
0.2/5P10	25	105	70	85	100	115	130	150
0.5/5P10	2.5	30	40	50	60	70	80	90
0.5/5P10	5	60	80	100	120	140	160	180
0.5/5P10	10	85	70	85	100	115	130	150
0.5/5P10	15	85	70	85	100	115	130	150
0.5/5P10	20	105	70	85	100	115	130	150
0.5/5P10	25	105	70	85	100	115	130	150
5P10/5P10	2.5	30	40	50	60	70	80	90
5P10/5P10	5	60	80	100	120	140	160	180
5P10/5P10	10	85	70	85	100	115	130	150
5P10/5P10	15	85	70	85	100	115	130	150
5P10/5P10	20	105	70	85	100	115	130	150
5P10/5P10	25	105	70	85	100	115	130	150
5P10/5P15	2.5	30	40	50	60	70	80	90
5P10/5P15	5	60	80	100	120	140	160	180
5P10/5P15	10	85	70	85	100	115	130	150
5P10/5P15	15	85	70	85	100	115	130	150
5P10/5P15	20	105	70	85	100	115	130	150
5P10/5P15	25	105	70	85	100	115	130	150
5P20/5P20	2.5	30	40	50	60	70	80	90
5P20/5P20	5	60	80	100	120	140	160	180
5P20/5P20	10	85	70	85	100	115	130	150
5P20/5P20	15	85	70	85	100	115	130	150
5P20/5P20	20	105	70	85	100	115	130	150
5P20/5P20	25	105	70	85	100	115	130	150

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS7515S — click image to zoom / view original.