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CGIS1580 Current Transformer Applied to CGIS Gas Insulated Switchgear

20kVCGIS1580

Winding & Schematic TopologyInternal Wiring Diagram

Primary Winding (P1 - P2):Series-connected in the line / through-core — 20kV

Secondary Metering (1S1 - 1S2): (0.2/0.5/6P(3P))

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:CGIS1580

CGIS1580 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
outer diameter Φ145mm
inner diameter Φ80mm

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS1580

Electrical Parameters

Primary Rated Voltage (Un):20kV

Secondary Winding Voltages:

Metering & Protection Class:0.2/0.5/6P(3P)

Rated Output Burden:15VA / 20VA / 100VA

Rated Frequency:50Hz or 60Hz

Insulation & Withstand Ratings

Insulation System:Dry Epoxy Resin

Insulation Level (BIL):24/65/125kV,18/55/105kV

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 CGIS at 20kV, 50/60Hz, with multiple accuracy and burden options.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS1580	Factory nameplate marking
Primary Voltage	20kV	Rated voltage test (IEC 61869-1/3)
Secondary Voltage	[On Request]	Ratio check at rated frequency
Accuracy Class	0.2/0.5/6P(3P)	Accuracy test (IEC 61869-2 / IEEE C57.13)
Rated Burden	15VA / 20VA / 100VA	Burden test at rated VA
Insulation Type	Dry Epoxy Resin	Dielectric tests per standard
Insulation Level (BIL)	24/65/125kV,18/55/105kV	Power-frequency & lightning impulse withstand
Standards	[On Request]	Certified to listed standards
Frequency	50Hz or 60Hz	Per IEC 61869-1
Environment	[On Request]	Per datasheet limits

Fit & Unfit Boundaries

Ideal For

CGIS gas insulated switchgear
Indoor medium voltage switchgear
Metering and protection applications
20kV systems

Not Recommended For

Outdoor installations
High voltage above 24kV
Oil-immersed transformers
DC systems

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 level of this CT?

A: The insulation level is 24/65/125kV and 18/55/105kV, meaning for 24kV system, power-frequency withstand 65kV and lightning impulse 125kV peak; for 18kV system, 55kV and 105kV respectively.

Q: Can this CT be used outdoors?

A: No, it is designed for indoor use with epoxy resin insulation, suitable for CGIS switchgear.

Q: What are the available accuracy classes?

A: Accuracy classes include 0.2, 0.5, and 6P(3P) for metering and protection.

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

CGIS1580
13 cols · 33 rows

CGIS1580 Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy class	Rated output (VA)	75	100	125	150	200	250	300	400	600	600	750
0.2FS10/0.5FS10	2.5	—	—	135	105	65	45	40	30	30	30	30
0.2FS10/0.5FS10	5	—	—	—	—	65	65	50	40	35	35	30
0.2FS10/0.5FS10	7.5	—	—	—	130	85	65	50	40	40	35	30
0.2FS10/0.5FS10	10	—	—	—	105	80	60	50	45	40	40	35
0.2FS10/0.5FS10	15	—	—	—	140	105	80	60	50	55	45	40
0.2FS10/0.5FS10	20	—	—	—	—	—	130	95	75	65	55	50
0.2FS10/0.5FS10	25	—	—	—	—	—	—	115	90	75	65	60
0.2FS10/0.5FS10	30	—	—	—	—	—	—	135	100	85	70	65
0.5FS10	2.5	—	105	70	55	45	35	25	25	25	25	25
0.5FS10	5	—	—	110	85	60	50	45	35	30	30	25
0.5FS10	7.5	—	—	105	75	60	55	40	35	30	25	25
0.5FS10	10	—	—	130	80	75	65	45	40	35	30	25
0.5FS10	15	—	—	—	125	100	85	60	50	45	30	30
0.5FS10	20	—	—	—	—	125	105	75	65	50	35	35
0.5FS10	25	—	—	—	—	—	125	90	75	55	40	40
0.5FS10	30	—	—	—	—	—	—	105	85	65	45	45
5P10/10P10	2.5	125	90	80	65	50	45	40	35	35	30	30
5P10/10P10	5	—	140	125	105	75	65	55	45	40	40	40
5P10/10P10	7.5	—	—	—	105	85	70	60	55	50	45	40
5P10/10P10	10	—	—	—	130	105	85	70	70	60	55	45
5P10/10P10	15	—	—	—	—	140	120	95	80	70	70	60
5P10/10P10	20	—	—	—	—	—	120	115	100	85	80	80
5P10/10P10	25	—	—	—	—	—	—	135	115	100	85	85
5P10/10P10	30	—	—	—	—	—	—	—	135	115	100	100
5P20/10P20	2.5	—	140	120	95	80	70	60	60	50	50	50
5P20/10P20	5	—	—	—	120	105	90	85	75	65	60	60
5P20/10P20	7.5	—	—	—	—	140	120	110	95	85	80	80
5P20/10P20	10	—	—	—	—	—	—	135	115	115	100	100
5P20/10P20	15	—	—	—	—	—	—	—	135	115	115	100
5P30/10P30	1.5	—	—	140	110	95	80	75	70	65	60	60
5P30/10P30	2.5	—	—	—	120	105	95	85	85	75	70	70
5P30/10P30	5	—	—	—	—	—	—	130	110	100	100	100
5P30/10P30	7.5	—	—	—	—	—	—	—	145	130	120	120

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS1580 — click image to zoom / view original.