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CGIS3608 Current Transformer Applied to CGIS Gas Insulated Switchgear

12kVCGIS3608

Winding & Schematic TopologyInternal Wiring Diagram

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

Secondary Metering (1S1 - 1S2):5A or 1A (0.2FS10/0.5SFS10,0.5,5(10)P10,5(10)P20,5(10)P30)

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:CGIS3608

CGIS3608 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 rectangular housing
360mm width
wide current range

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS3608

Electrical Parameters

Primary Rated Voltage (Un):12kV

Secondary Winding Voltages:5A or 1A

Metering & Protection Class:0.2FS10/0.5SFS10,0.5,5(10)P10,5(10)P20,5(10)P30

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

CGIS3608 is a dry epoxy resin current transformer for 12kV gas-insulated switchgear, offering multiple accuracy classes and a wide current range. Suitable for indoor CGIS applications requiring high precision and protection.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS3608	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	0.2FS10/0.5SFS10,0.5,5(10)P10,5(10)P20,5(10)P30	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) indoor installations
Metering and protection applications requiring accuracy class 0.2FS10 or 0.5SFS10
Protection schemes needing class 5P10, 5P20, or 5P30 with rated burden options
Systems operating at 50/60Hz with secondary current of 5A or 1A

Not Recommended For

Outdoor installations or environments with high humidity and pollution
Voltage levels above 12kV (e.g., 24kV, 36kV) without additional insulation
Applications requiring high-accuracy metering beyond class 0.2S (e.g., 0.1 class)
Oil-filled or SF6-insulated transformer requirements

Topology & Wiring

For current transformers, ensure secondary terminals are connected as 1S1 and 1S2 for the main winding; if a second protection winding is present, use 2S1 and 2S2. Never open-circuit the secondary of a CT while energized - hazardous voltage may occur. Ground the secondary winding at one point to ensure safety. Follow IEC 61869-2 terminal markings and verify polarity for correct operation.

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 the CGIS3608?

A: The primary voltage rating is 12kV.

Q: What accuracy classes are available?

A: Accuracy classes include 0.2FS10, 0.5SFS10, 0.5, and protection classes 5P10, 5P20, 5P30.

Q: Can this CT be used outdoors?

A: No, it is designed for indoor use in 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

CGIS3608
18 cols · 35 rows

CGIS3608 Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	75	100	125	150	200	250	300	400	500	600	750	1000	1200	1500	2000	2500
0.2FS10 / 0.5FS10	2.5	—	—	—	—	80	55	40	30	30	30	30	30	35	35	35	35
	5	—	—	—	—	115	75	55	40	30	30	30	35	35	35	35	35
	10	—	—	—	—	115	85	50	40	35	30	30	35	35	35	35	35
	15	—	—	—	—	115	105	65	50	40	35	30	35	35	35	35	35
	20	—	—	—	—	140	80	60	45	40	35	35	35	35	35	35	35
	25	—	—	—	—	165	95	70	55	45	40	35	35	35	35	35	35
	30	—	—	—	—	—	—	110	80	60	50	40	40	40	40	35	35
0.5FS10	2.5	—	105	75	60	40	35	30	30	30	20	25	25	25	25	25	25
	5	—	165	115	90	55	45	35	30	30	20	25	25	25	25	25	25
	10	—	—	155	85	60	50	40	35	30	25	25	25	25	25	25	25
	15	—	—	115	80	60	45	40	35	30	25	25	25	25	25	25	25
	20	—	—	145	100	75	55	45	40	35	30	25	25	25	25	25	25
	25	—	—	—	120	90	65	55	45	35	30	25	25	25	25	25	25
	30	—	—	—	—	140	100	70	60	55	40	35	30	25	25	25	25
10P10	2.5	110	70	60	50	40	35	30	25	25	20	20	20	20	20	25	25
	5	185	110	100	80	55	45	40	35	30	25	25	25	20	20	25	25
	10	—	—	180	140	90	70	80	55	45	40	35	30	25	30	25	30
	15	—	—	—	125	100	85	70	60	50	45	40	35	30	35	35	35
	20	—	—	—	180	125	105	90	75	60	55	45	40	35	40	35	40
	25	—	—	—	—	150	125	105	90	75	60	55	45	40	45	40	40
	30	—	—	—	—	175	145	125	105	85	70	60	55	45	50	45	50
10P20	2.5	150	115	95	80	60	50	45	35	35	30	30	30	30	35	35	35
	5	—	180	150	125	95	75	65	60	50	45	40	40	35	35	40	40
	10	—	—	—	160	125	105	85	80	70	60	50	45	40	45	45	45
	15	—	—	—	210	175	145	135	110	90	80	70	60	55	60	50	50
	20	—	—	—	—	185	170	135	115	95	85	75	65	65	65	60	60
	25	—	—	—	—	—	165	140	115	100	85	75	75	65	75	65	65
	30	—	—	—	—	—	—	160	135	115	100	85	85	75	85	75	75
10P30	2.5	—	180	135	115	85	70	60	50	45	40	40	40	50	50	45	45
	5	—	—	185	135	110	95	85	75	65	55	55	50	50	60	55	55
	10	—	—	—	180	155	145	120	100	85	80	75	65	65	70	65	65
	15	—	—	—	—	—	170	135	115	105	95	90	80	80	90	80	80
	20	—	—	—	—	—	—	175	145	130	120	100	105	90	105	90	90
	25	—	—	—	—	—	—	—	175	155	140	115	125	105	125	105	105
	30	—	—	—	—	—	—	—	—	180	160	140	140	120	120	120	120

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS3608 — click image to zoom / view original.