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CGIS1760 Current Transformer Applied to CGIS Gas Insulated Switchgear

35kVCGIS1760

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:CGIS1760

CGIS1760 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
square housing with 102.5mm inner window

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS1760

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

CGIS1760 is a 35kV indoor epoxy resin current transformer for CGIS gas insulated switchgear, offering multiple accuracy and burden options.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS1760	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

Indoor CGIS gas insulated switchgear applications
35kV power systems at 50/60Hz
Metering and protection with multiple accuracy classes
Installations requiring a square window of 102.5mm

Not Recommended For

Outdoor installations
Voltage transformation
Oil or SF6 insulated equipment
Non-CGIS applications

Topology & Wiring

Connect primary through the window. Secondary terminals: 1S1/1S2 for metering, 2S1/2S2 for protection. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point.

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?

A: Dry epoxy resin.

Q: What is the primary voltage rating?

A: 35kV.

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

CGIS1760
18 cols · 16 rows

CGIS1760 Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	40	50	60	75	100	125	150	200	250	300	400	500	600	750	1000	1200
0.2S FS10 / 0.2 FS10 / 0.5 FS10	2.5	—	—	—	—	85	60	50	35	30	30	30	30	30	35	35	35
	5	—	—	—	—	130	90	70	50	40	35	30	30	30	35	35	35
	10	—	—	—	—	—	150	115	75	55	45	35	30	35	35	35	35
	15	—	—	—	—	—	—	160	100	70	55	45	40	35	35	35	35
0.5FS10	2.5	—	—	115	80	50	40	35	30	30	25	25	25	25	25	25	—
	5	—	—	120	75	60	45	35	30	30	30	25	25	25	25	25	—
	10	—	—	—	120	90	70	50	40	35	30	25	25	25	25	25	—
	15	—	—	—	—	120	90	65	55	45	40	35	30	25	25	25	—
5P10 / 10P10	2.5	135	100	85	75	55	45	40	35	30	30	30	30	30	25	25	25
	5	—	135	120	85	70	55	50	45	40	40	35	35	30	30	30	—
	10	—	—	145	110	95	80	70	60	60	50	45	45	35	35	35	—
	15	—	—	—	155	130	110	90	80	80	65	60	50	45	45	45	—
5P20 / 10P20	2.5	—	145	125	90	75	65	60	50	50	50	40	40	35	35	35	35
	5	—	—	145	115	95	90	75	70	65	55	50	50	45	45	45	—
	10	—	—	—	—	150	125	110	105	85	75	70	60	60	60	60	60
	15	—	—	—	—	—	—	150	140	115	100	90	75	75	75	75	75

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS1760 — click image to zoom / view original.