Home Products Current TransformerLMZC-10

LMZC-10 Indoor Foot-Fixed High-Precision Current Transformer

20kVLMZC-10

Winding & Schematic TopologyInternal Wiring Diagram

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

Secondary Metering (1S1 - 1S2): (0.2/3P(6P)、0.5/3P(6P)、1.0/3P(6P))

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:LMZC-10

LMZC-10 Indoor Foot-Fixed High-Precision Current Transformer

Indoor single-phase foot-fixed current transformer matching 10kV ring main units, compliant with GB/T20840.1/2 and IEC61869-1/2 standards.

Key Engineering Advantages

Foot-fixed precision CT specially designed for 10kV ring main cabinet installation

Engineering Data

Complete Electrical & Mechanical Specifications

Model Ref: LMZC-10

Electrical Parameters

Primary Rated Voltage (Un):20kV

Secondary Winding Voltages:

Metering & Protection Class:0.2/3P(6P)、0.5/3P(6P)、1.0/3P(6P)

Rated Output Burden:60VA(0.2),120VA(0.5),200VA(1.0),100VA(3P)

Rated Frequency:50Hz/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 CT for 10kV RMU; accuracy 0.2/3P(6P) etc.; dry epoxy insulation.

Comprehensive Spec Matrix

Parameter	Specification	Verification
Product Type	Current Transformer	[On Request]
Model Code	LMZC-10	Factory nameplate marking
Primary Voltage	20kV	Rated voltage test (IEC 61869-1/3)
Secondary Voltage	[On Request]	Ratio check at rated frequency
Accuracy Class	0.2/3P(6P)、0.5/3P(6P)、1.0/3P(6P)	Accuracy test (IEC 61869-2 / IEEE C57.13)
Rated Burden	60VA(0.2),120VA(0.5),200VA(1.0),100VA(3P)	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	50Hz/60Hz	Per IEC 61869-1
Environment	[On Request]	Per datasheet limits

Fit & Unfit Boundaries

Ideal For

10kV indoor ring main units
Metering and protection applications
Indoor switchgear panels
Dry environment installations

Not Recommended For

Outdoor substations
Gas-insulated switchgear (GIS)
High-voltage transmission lines
DC systems

Topology & Wiring

secondary terminals 1S1/1S2 (protection winding 2S1-2S2). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal conventions.

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?

A: The primary voltage is 20kV, suitable for 10kV systems.

Q: What accuracy classes are available?

A: Available accuracy classes include 0.2/3P(6P), 0.5/3P(6P), and 1.0/3P(6P).

Q: Is this CT suitable for outdoor use?

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

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

LMZC-10
2 cols · 5 rows

LMZC-10 Series Current Transformer

Parameter	Value
Product performance complies with standards	GB/T20840.1, 2 and IEC61869-1, 2
Rated insulation level	0.72/3kV
Rated frequency	50Hz or 60Hz
Rated secondary current	5A or 1A
Ambient temperature	-5℃~+40℃

Engineering Drawing

Specification & Outline Drawing

Original image, not compressed

Dimension & outline drawing of LMZC-10 — click image to zoom / view original.