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CGIS3815 Current Transformer Applied to CGIS Gas Insulated Switchgear

12kVCGIS3815

Winding & Schematic TopologyInternal Wiring Diagram

Primary Winding (P1 - P2):Series-connected in the line / through-core — 12kV

Secondary Metering (1S1 - 1S2):5A or 1A (0.2FS10/0.5SFS10,0.5FS10,5P10/10P10,5P15/10P15,5P20/10P20)

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:CGIS3815

CGIS3815 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
extra large diameter split ring type
outer diameter Ø376mm max
inner diameter Ø150mm

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS3815

Electrical Parameters

Primary Rated Voltage (Un):12kV

Secondary Winding Voltages:5A or 1A

Metering & Protection Class:0.2FS10/0.5SFS10,0.5FS10,5P10/10P10,5P15/10P15,5P20/10P20

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 casting current transformer for CGIS gas insulated switchgear, suitable for 12kV systems with multiple accuracy classes and burdens.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS3815	Factory nameplate marking
Primary Voltage	12kV	Rated voltage test (IEC 61869-1/3)
Secondary Voltage	5A or 1A	Ratio check at rated frequency
Accuracy Class	0.2FS10/0.5SFS10,0.5FS10,5P10/10P10,5P15/10P15,5P20/10P20	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

12kV gas-insulated switchgear (CGIS) applications
Indoor metering and protection in MV networks
Current measurement with secondary 5A or 1A
High accuracy metering (0.2/0.5S) and protection (5P/10P) classes

Not Recommended For

Outdoor installations without additional enclosure
Voltage transformation or potential indication
Systems above 12kV without verification
Open-core applications requiring high mechanical strength

Topology & Wiring

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. Follow IEC 61869-2 terminal markings.

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 maximum primary current rating?

A: The primary current rating is not specified in the provided data; it is [On Request].

Q: What are the available accuracy classes?

A: Accuracy classes include 0.2FS10, 0.5SFS10, 0.5FS10, 5P10/10P10, 5P15/10P15, and 5P20/10P20.

Q: Is this CT suitable for outdoor use?

A: No, it is designed for indoor use within CGIS gas-insulated switchgear.

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

CGIS3815
25 cols · 29 rows

CGIS3815 Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	Rated primary current (A)	(75) h	(75) h	(100) h	(100) h	125 h	125 h	150 h	150 h	200 h	200 h	250 h	250 h	300 h	300 h	400 h	400 h	500 h	500 h	600 h	600 h	750 h	750 h
0.2FS10	2.5	—	—	51	—	51	—	41	—	36	—	31	—	31	—	31	—	31	—	31	—	31	—	31
0.2FS10	5	—	—	46	—	51	—	51	—	46	—	36	—	36	—	31	—	31	—	31	—	31	—	31
0.2FS10	7.5	—	—	—	—	51	—	51	—	51	—	51	—	41	—	36	—	36	—	31	—	31	—	31
0.2FS10	10	—	—	—	—	—	—	51	—	51	—	51	—	51	—	41	—	46	—	41	—	36	—	31
0.2FS10	15	—	—	—	—	—	—	—	—	51	—	51	—	51	—	51	—	51	—	51	—	51	—	51
0.2FS10	20	—	—	—	—	—	—	—	—	—	—	51	—	51	—	51	—	51	—	51	—	51	—	51
0.5FS10	2.5	—	—	51	—	41	—	41	—	31	—	31	—	31	—	31	—	31	—	31	—	31	—	31
0.5FS10	5	—	—	46	—	51	—	51	—	51	—	46	—	36	—	36	—	31	—	31	—	31	—	31
0.5FS10	7.5	—	—	—	—	51	—	51	—	51	—	51	—	46	—	41	—	41	—	36	—	31	—	—
0.5FS10	10	—	—	—	—	—	—	51	—	46	—	51	—	51	—	51	—	51	—	51	—	51	—	—
0.5FS10	15	—	—	—	—	—	—	—	—	51	—	51	—	51	—	51	—	51	—	51	—	51	—	51
0.5FS10	20	—	—	—	—	—	—	—	—	—	—	51	—	51	—	51	—	51	—	51	—	51	—	51
5P10/10P10	2.5	85	50	50	40	30	25	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
5P10/10P10	5	155	100	110	65	45	35	25	25	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
5P10/10P10	7.5	140	155	85	55	40	30	30	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25
5P10/10P10	10	170	185	110	70	50	40	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
5P10/10P10	15	—	—	180	160	100	70	50	45	40	35	35	35	35	35	35	35	35	35	35	35	35	35	35
5P10/10P10	20	—	—	—	—	180	130	90	65	55	45	40	40	40	40	40	40	40	40	40	40	40	40	40
5P10/10P10	25	—	—	—	—	155	160	110	75	60	55	50	50	50	50	50	50	50	50	50	50	50	50	50
5P10/10P10	30	—	—	—	—	185	190	130	85	70	65	55	55	55	55	55	55	55	55	55	55	55	55	55
5P20/10P20	2.5	130	70	55	50	40	35	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
5P20/10P20	5	150	160	110	65	55	45	40	35	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
5P20/10P20	7.5	—	—	130	155	90	55	65	50	45	40	40	40	40	40	40	40	40	40	40	40	40	40	40
5P20/10P20	10	—	—	170	180	115	85	80	65	55	50	45	45	45	45	45	45	45	45	45	45	45	45	45
5P20/10P20	15	—	—	—	—	170	165	130	110	85	75	65	60	60	60	60	60	60	60	60	60	60	60	60
5P20/10P20	7.5	85	65	55	45	40	35	30	30	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25
5P30/10P30	2.5	130	95	80	65	55	45	40	35	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
5P30/10P30	5	145	150	120	90	75	65	55	45	40	40	40	40	40	40	40	40	40	40	40	40	40	40	40
5P30/10P30	7.5	—	—	135	175	130	105	90	75	65	60	55	55	55	55	55	55	55	55	55	55	55	55	55

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS3815 — click image to zoom / view original.