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CGIS2070 II Current Transformer Applied to CGIS Gas Insulated Switchgear

35kVCGIS2070-II

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:CGIS2070-II

CGIS2070 II 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 Ø70mm inner window

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS2070-II

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; suitable for metering and protection in gas-insulated switchgear.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS2070-II	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 installations
Current measurement and protection in medium-voltage distribution networks
Applications requiring multiple accuracy classes and rated burdens
Integration into switchgear with Ø70mm busbar/window

Not Recommended For

Outdoor or open-air substations
Voltage transformation or potential indication
High-voltage transmission systems above 35kV
Oil-immersed or SF6-free insulation requirements

Topology & Wiring

connect primary through window; secondary terminals 1S1/1S2 for main winding, 2S1-2S2 for protection winding. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary circuit at one point per IEC 61869-2.

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: What is the inner window diameter?

A: Ø70mm

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

CGIS2070-II
18 cols · 35 rows

CGIS2070II Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	Rated primary current (A)
Accuracy class	Rated output (VA)	(40)	(50)	(60)	(75)	(100)	(125)	(150)	(200)	(250)	(300)	(400)	(500)	(600)	(750)	(1000)	(1200)
0.2FS10 / 0.5FS10	2.5	—	—	—	45	35	30	30	30	30	30	30	30	30	30	30	30
0.2FS10 / 0.5FS10	5	—	—	—	70	40	40	30	30	30	30	30	30	30	30	30	30
0.2FS10 / 0.5FS10	10	—	—	—	—	60	50	40	35	30	30	30	30	30	30	30	30
0.2FS10 / 0.5FS10	15	—	—	—	—	—	50	40	40	35	30	30	30	30	30	30	30
0.2FS10 / 0.5FS10	20	—	—	—	—	—	—	—	—	40	35	30	30	30	30	30	30
0.2FS10 / 0.5FS10	25	—	—	—	—	—	—	—	—	—	35	30	30	30	30	30	30
0.2FS10 / 0.5FS10	30	—	—	—	—	—	—	—	—	—	—	40	35	30	30	30	30
0.5FS810	2.5	—	—	45	35	30	30	30	30	30	30	30	30	30	30	30	—
0.5FS810	5	—	—	65	45	35	30	30	30	30	30	30	30	30	30	30	—
0.5FS810	10	—	—	65	55	45	40	35	30	30	30	30	30	30	30	30	—
0.5FS810	15	—	—	—	—	45	40	35	30	30	30	30	30	30	30	30	—
0.5FS810	20	—	—	—	—	—	—	40	35	30	30	30	30	30	30	30	—
0.5FS810	25	—	—	—	—	—	—	—	—	35	30	30	30	30	30	30	—
0.5FS810	30	—	—	—	—	—	—	—	—	—	35	30	30	30	30	30	—
5P10 / 10P10	2.5	70	60	50	40	35	30	30	25	25	25	25	25	25	25	25	25
5P10 / 10P10	5	110	90	75	60	50	45	40	35	30	25	25	25	25	25	25	25
5P10 / 10P10	10	—	145	125	100	80	65	60	50	40	35	30	30	30	25	30	30
5P10 / 10P10	15	—	—	140	110	90	80	65	55	45	40	35	35	30	35	30	35
5P10 / 10P10	20	—	—	—	140	115	100	80	65	55	45	40	40	35	35	35	35
5P10 / 10P10	25	—	—	—	—	135	115	95	75	65	55	45	40	40	35	35	35
5P10 / 10P10	30	—	—	—	—	135	110	90	75	60	55	50	45	45	40	40	40
5P20 / 10P20	2.5	130	105	90	75	60	50	45	40	35	35	30	30	30	30	30	30
5P20 / 10P20	5	—	140	115	90	75	65	55	50	45	40	40	35	35	35	35	35
5P20 / 10P20	10	—	—	145	125	110	85	75	65	55	50	50	45	45	45	40	40
5P20 / 10P20	15	—	—	—	115	100	85	75	70	65	60	55	50	45	45	45	45
5P20 / 10P20	20	—	—	—	—	145	120	105	85	80	75	65	60	55	50	50	50
5P20 / 10P20	25	—	—	—	—	—	—	130	100	95	85	75	65	60	55	55	55
5P20 / 10P20	30	—	—	—	—	—	—	—	115	115	95	85	75	70	65	65	65
5P30 / 10P30	2.5	—	135	110	85	75	65	55	50	45	40	40	40	40	40	40	40
5P30 / 10P30	5	—	—	135	110	95	80	70	60	55	50	50	50	50	50	50	50
5P30 / 10P30	10	—	—	—	—	135	110	95	80	75	70	65	60	55	55	55	55
5P30 / 10P30	15	—	—	—	—	—	145	125	100	90	85	75	70	65	65	65	65
5P30 / 10P30	20	—	—	—	—	—	—	—	130	125	110	95	90	85	80	75	75
5P30 / 10P30	25	—	—	—	—	—	—	—	—	—	130	110	95	85	85	85	85
5P30 / 10P30	30	—	—	—	—	—	—	—	—	—	—	125	110	95	95	95	95

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS2070-II — click image to zoom / view original.