Current Transformer (for Ring Network Cabinet)
Product Model
Technical Parameters
The double winding parameters and capacity can be confirmed with the merchant, and the product shape can be heightened according to demand.
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Model |
LMZC1、2、3-10 |
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|
Purpose |
Measuring current transformer |
Protection current transformer |
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|
Current ratio |
Accuracy class and rated load |
Accuracy class and rated load |
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|
0.2S |
0.2 |
0.5 |
10P15 |
10P10 |
10P5 |
|
|
40/1(5) |
|
|
|
|
|
1 |
|
50/1(5) |
|
1 |
1 |
|
1 |
1 |
|
75/1(5) |
|
1 |
1 |
1 |
1 |
2.5 |
|
100/1(5) |
|
2.5 |
2.5 |
1 |
1 |
3.75 |
|
150/1(5) |
2.5 |
3.75 |
3.75 |
1 |
2.5 |
5 |
|
200/1(5) |
3.75 |
5 |
5 |
2.5 |
3.75 |
7.5 |
|
300/1(5) |
5 |
7.5 |
7.5 |
3.75 |
5 |
12.5 |
|
400/1(5) |
7.5 |
10 |
10 |
5 |
7.5 |
15 |
|
500/1(5) |
10 |
12.5 |
12.5 |
5 |
10 |
20 |
|
600/1(5) |
12.5 |
15 |
15 |
7.5 |
12.5 |
25 |
Outline Dimension
Product Functions
This transformer performs two essential roles. It enables accurate measurement of current and energy for monitoring and metering purposes, utilizing a high-permeability composite alloy core for precision. It provides reliable current signals for protective relaying, utilizing a processed silicon steel core to ensure a precise limit coefficient and system security. By converting high primary currents into standardized, low secondary signals, it serves as a critical interface between power cables and secondary equipment like meters and protective relays within compact switchgear.
Applicable Environment
This product is specifically designed for installation in compact, medium-voltage switchgear. Its primary application is within the cable compartment of Ring Main Units (RMUs) and compact switch cabinets in AC power distribution systems rated up to 35kV and 10kV. It is ideal for space-constrained environments in urban distribution networks, commercial complexes, and industrial plants where reliable, dual-purpose current sensing is required. Its moisture-proof and stable design suits typical indoor electrical enclosure conditions.
Product Highlights
◆Dual-Core High Performance: Features a specialized composite alloy core for high-accuracy measurement and a processed silicon steel core for reliable protection, ensuring both precision and safety.
◆Compact & Easy Installation: Toroidal design is lightweight and space-saving; installation is simplified to passing the primary cable through the central hole, saving time and labor.
◆Robust & Maintenance-Free: Windings are vacuum-cast with flame-retardant epoxy resin in a plastic shell, offering superior moisture resistance, mechanical protection, and long-term stability.
◆High Reliability Metrics: Delivers a high instrument security factor for meter protection and an accurate limit coefficient for dependable protective relay operation.