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CGIS2517 Current Transformer Applied to CGIS Gas Insulated Switchgear

35kVCGIS2517

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:CGIS2517

CGIS2517 Current Transformer Applied to CGIS Gas Insulated Switchgear

Indoor epoxy resin casting current transformer designed for CGIS gas insulated switchgear, with multiple accuracy class, rated burden and primary current options.

Key Engineering Advantages

Indoor epoxy resin casting current transformer for CGIS
large diameter thin-wall ring type
outer diameter Ø250mm
inner diameter Ø168mm

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS2517

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

Indoor epoxy resin CT for 35kV CGIS switchgear; ring type with Ø250/Ø168mm.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS2517	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 gas-insulated switchgear (CGIS) indoor applications
Current measurement and protection in medium-voltage networks
Integration into ring-type bushing or cable compartments
Use with protection and metering relays at 50/60Hz

Not Recommended For

Outdoor or open-air installations without additional enclosure
High-voltage systems above 35kV
Applications requiring a bar primary or window-type CT with smaller inner diameter
DC or high-frequency current measurement

Topology & Wiring

secondary terminals 1S1/1S2 (protection winding 2S1-2S2 if applicable). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point per IEC 61869-2. Ensure proper shorting before disconnecting 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 primary voltage rating?

A: 35kV.

Q: What is the insulation type?

A: Dry epoxy resin.

Q: Is it suitable for outdoor use?

A: No, it is designed for indoor CGIS applications.

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

CGIS2517
22 cols · 32 rows

CGIS2517 Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	(100)		(150)		(200)		(250)		(300)		(400)		(500)		(600)		(800)		(1000)
Accuracy class	Rated output (VA)	h	l	h	l	h	l	h	l	h	l	h	l	h	l	h	l	h	l	h	l
0.2FS5/10 0.2FS10/ 0.5FS10	2.5	—	—	165	—	85	—	55	—	40	—	35	—	35	—	30	—	25	—	—	—
	5	—	—	205	—	115	—	85	—	55	—	40	—	40	—	35	—	35	—	—	—
	7.5	—	—	—	—	145	—	105	—	65	—	55	—	50	—	35	—	35	—	—	—
	10	—	—	—	—	135	—	75	—	60	—	55	—	40	—	35	—	35	—	—	—
	15	—	—	—	—	205	—	185	—	105	—	80	—	70	—	50	—	40	—	—	—
	20	—	—	—	—	—	—	205	—	135	—	100	—	85	—	60	—	45	—	—	—
	25	—	—	—	—	—	—	—	—	155	—	120	—	100	—	70	—	50	—	—	—
	30	—	—	—	—	—	—	—	—	175	—	145	—	115	—	80	—	65	—	—	—
0.5FS10	2.5	145	—	65	—	55	—	45	—	45	—	35	—	20	—	20	—	20	—	—	—
	5	—	—	105	—	85	—	65	—	55	—	45	—	25	—	20	—	20	—	—	—
	7.5	—	—	135	—	105	—	85	—	75	—	55	—	35	—	30	—	25	—	—	—
	10	—	—	—	—	115	—	105	—	105	—	65	—	40	—	35	—	30	—	—	—
	15	—	—	—	—	—	—	135	—	115	—	95	—	50	—	40	—	35	—	—	—
	20	—	—	—	—	—	—	—	—	145	—	125	—	70	—	50	—	40	—	—	—
	25	—	—	—	—	—	—	—	—	—	—	145	—	90	—	60	—	45	—	—	—
	30	—	—	—	—	—	—	—	—	—	—	165	—	100	—	70	—	50	—	—	—
5P10/10P10	2.5	80	—	55	—	45	—	40	—	35	—	35	—	30	—	30	—	25	—	—	—
	5	—	—	125	—	85	—	70	—	60	—	50	—	40	—	35	—	35	—	—	—
	7.5	—	—	170	—	120	—	90	—	80	—	65	—	50	—	45	—	40	—	—	—
	10	—	—	—	—	150	—	120	—	100	—	80	—	70	—	55	—	45	—	—	—
	15	—	—	—	—	—	—	170	—	140	—	110	—	95	—	80	—	70	—	55	—
	20	—	—	—	—	—	—	—	—	180	—	140	—	120	—	100	—	85	—	70	—
	25	—	—	—	—	—	—	—	—	—	—	170	—	150	—	120	—	105	—	80	—
	30	—	—	—	—	—	—	—	—	—	—	—	—	170	—	140	—	120	—	95	—
5P20/10P20	2.5	160	—	110	—	90	—	75	—	65	—	65	—	60	—	55	—	45	—	—	—
	5	—	—	180	—	140	—	115	—	95	—	100	—	70	—	60	—	55	—	—	—
	7.5	—	—	—	—	190	—	155	—	130	—	130	—	105	—	90	—	75	—	—	—
	10	—	—	—	—	—	—	190	—	165	—	155	—	130	—	110	—	90	—	—	—
	15	—	—	—	—	—	—	—	—	—	—	—	—	180	—	150	—	120	—	100	—
	20	—	—	—	—	—	—	—	—	—	—	—	—	—	—	190	—	155	—	130	—
	25	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	190	—	155	—
	30	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	180	—

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS2517 — click image to zoom / view original.