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CGIS9817S Current Transformer for Inflatable Switchgear

35kVCGIS9817S

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:CGIS9817S

CGIS9817S Current Transformer for Inflatable Switchgear

Three-phase integrated current transformer for CGIS inflatable switchgear, multiple accuracy grades and wide primary current range available; secondary lead specifications and stacked product height support customized production.

Key Engineering Advantages

Three-phase integrated structure
exclusive dimension design
customizable outgoing wire parameters

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: CGIS9817S

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

CGIS9817S is a three-phase integrated current transformer for 35kV inflatable switchgear, offering customizable accuracy and primary current ranges. Suitable for metering and protection in RMU applications.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	CGIS9817S	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 ring main units (RMU) and inflatable switchgear
Indoor GIS applications requiring compact, integrated CTs
Revenue metering and protection schemes with multiple accuracy classes
Custom secondary lead configurations and stacked height requirements

Not Recommended For

Outdoor substations or open-terminal applications
Voltage transformation or potential indication
High-voltage transmission lines above 35kV
Oil-filled or SF6-insulated CT replacements without adaptation

Topology & Wiring

For current transformers (CT), secondary terminals are designated 1S1/1S2 for the main winding, and 2S1/2S2 for the protection winding if present. Never open-circuit the secondary of a CT while energized – hazardous voltage may occur. Ground the secondary circuit at one point only, in accordance with IEC 61869-2 and IEEE C57.13. Ensure shorting links are provided before disconnecting the secondary wiring.

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 CGIS9817S?

A: The primary voltage is 35kV, suitable for 35kV systems.

Q: Can the CGIS9817S be used for outdoor installations?

A: No, it is designed for indoor inflatable switchgear (CGIS) and ring main units.

Q: What are the available accuracy classes?

A: Multiple accuracy grades are available, but specific classes are [On Request].

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

CGIS9817S
9 cols · 35 rows

CGIS7515S, 9817S, 1021S Current Transformer for Gas-Insulated Switchgear — Technical Data

Accuracy classCombined	Rated primary current (A)	200	300	400	500	600	700	800
0.2/5P10	2.5	30	40	50	60	70	80	—
	5	60	70	80	90	100	110	—
	7.5	85	100	115	130	145	160	—
	10	105	125	145	165	185	205	—
	15	135	160	185	210	235	260	—
	20	165	195	225	255	285	315	—
	25	195	230	265	300	335	370	—
0.5/5P10	2.5	30	40	50	60	70	80	—
	5	60	70	80	90	100	110	—
	7.5	85	100	115	130	145	160	—
	10	105	125	145	165	185	205	—
	15	135	160	185	210	235	260	—
	20	165	195	225	255	285	315	—
	25	195	230	265	300	335	370	—
5P10/5P10	2.5	30	40	50	60	70	80	—
	5	60	70	80	90	100	110	—
	7.5	85	100	115	130	145	160	—
	10	105	125	145	165	185	205	—
	15	135	160	185	210	235	260	—
	20	165	195	225	255	285	315	—
	25	195	230	265	300	335	370	—
5P15/5P15	2.5	30	40	50	60	70	80	—
	5	60	70	80	90	100	110	—
	7.5	85	100	115	130	145	160	—
	10	105	125	145	165	185	205	—
	15	135	160	185	210	235	260	—
	20	165	195	225	255	285	315	—
	25	195	230	265	300	335	370	—
5P20/5P20	2.5	30	40	50	60	70	80	—
	5	60	70	80	90	100	110	—
	7.5	85	100	115	130	145	160	—
	10	105	125	145	165	185	205	—
	15	135	160	185	210	235	260	—
	20	165	195	225	255	285	315	—
	25	195	230	265	300	335	370	—

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of CGIS9817S — click image to zoom / view original.