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LMZ2D-SKX1 State Grid Standard 0.66kV Current Transformer

0.66kVLMZ2D-SKX1

Winding & Schematic TopologyInternal Wiring Diagram

Primary Winding (P1 - P2):Series-connected in the line / through-core — 0.66kV

Secondary Metering (1S1 - 1S2):5A (0.2S/0.5S)

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:LMZ2D-SKX1

LMZ2D-SKX1 State Grid Standard 0.66kV Current Transformer

Indoor epoxy cast LV current transformer, State Grid standard, primary rated current 200-600A, accuracy 0.2S/0.5S.

Key Engineering Advantages

200-600A primary current
State Grid standard
0.66kV

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: LMZ2D-SKX1

Electrical Parameters

Primary Rated Voltage (Un):0.66kV

Secondary Winding Voltages:5A

Metering & Protection Class:0.2S/0.5S

Rated Output Burden:5VA

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 LV CT for 0.66kV systems, accuracy 0.2S/0.5S, primary 200-600A. Suitable for metering and protection in low-voltage distribution.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	LMZ2D-SKX1	Factory nameplate marking
Primary Voltage	0.66kV	Rated voltage test (IEC 61869-1/3)
Secondary Voltage	5A	Ratio check at rated frequency
Accuracy Class	0.2S/0.5S	Accuracy test (IEC 61869-2 / IEEE C57.13)
Rated Burden	5VA	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

Indoor low-voltage switchgear and panels
Revenue metering with 0.2S accuracy
Protection applications with 0.5S accuracy
50/60Hz systems

Not Recommended For

Outdoor or high-voltage applications
Primary currents above 600A
High burden requirements above 5VA
DC or high-frequency measurements

Topology & Wiring

Connect primary through the window. Secondary terminals are 1S1 and 1S2 (protection winding if present: 2S1-2S2). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Ensure burden does not exceed 5VA.

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 accuracy class of this CT?

A: It has 0.2S for metering and 0.5S for protection.

Q: Can it be used outdoors?

A: No, it is designed for indoor use only.

Q: What is the primary current range?

A: The primary rated current is 200-600A.

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

LMZ2D-SKX1
5 cols · 5 rows

LMZ1 (2,3,4)D Series Current Transformer

Model	Rated primary current (A)	Rated output (VA) 0.2 class	Rated output (VA) 0.5 class	Primary turns
LMZ1D-SKX1	75	5	5	1
LMZ2D-SKX2	100-150	5	5	1
LMZ3D-SKX1	200-600	5	5	1
LMZ4D-SKX1	600-800	10	10	1
LMZ4D-SKX1	800-1500	10	10	1

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of LMZ2D-SKX1 — click image to zoom / view original.