In Egypt you must pick the CTs with care. The need is strongest, in Cairo, Alexandria and Suez because the electric grid often changes, gets hot and carries loads. When the CTs are not stable or not accurate the safety system can fail. I have seen that the switchgear, the fuse breakers and the CTs always work as a fixed combination, in power projects. I also point out the uses of the DP series CTs the CP series CTs and the SFCT series CTs.

Why is CT so important in Egypt’s power distribution projects

CTs are indispensable in low-voltage switchgear, fuse units, distribution cabinets, and industrial/commercial power distribution upgrades.

The system performs three functions:

(1) Delivering current signals to protection systems (overload, short circuit, inverse time delay, etc.);

(2) Providing precise measurement data for metering systems;

(3) Enable automation systems to watch real‑time line conditions. I notice that the accuracy of the CT eyes decides if the switchgear stays on or if a fuse trips.

I notice that CT scans have requirements, for the three scenarios, in Egypt.

To help engineers understand engineers categorize by project scenarios:

Scenario A: Switchgear retrofit/factory expansion. Suitable for DP open Current transformer models DP-23/58/88/812/816, etc. Why is it applicable?

-Open design eliminates power outages.

-Open design is ideal, for aging facilities, challenging field conditions and projects that have power interruptions.

-Open design has internal window dimensions that fit 20mm to 160mm busbars and cables.

-Open design supports a range from 5A to 5000A.

-Open design works in the low‑voltage switchgear interiors the factory main power monitoring, generator sets and air conditioning or compressor load monitoring.

-Open design offers engineer features such as dual‑screw mounting, dual installation options (base or busbar) a design that works in any environment and operation that’s easy, in the field.

Scenario B: commercial buildings, factory measurement, high precision measurement projects. Suitable for CP series high precision CT. Why is it suitable?

– In my work I see the high precision come from the built‑in terminal cover that measures 0.2, 0.2S, 0.5S or 1.0. The transparent terminal cover lets the user inspect the connection and seal it to stop electricity theft.

– In my work I use the device to meter electricity bills. The current range of the device is, from 5 A to 3000 A.

– In my work I see the device used in energy management for buildings. The device also appears in metering boxes for factories in grid‑connected meters and for billing measurements, for power distribution companies.

– Engineers tell me they like the precision of the device. Engineers tell me they like the structure of the device. Engineers tell me they like the seal of the device. The high precision and easy seal make the device the preferred metering CT for power distribution companies.

Scenario C: Integrated application of a circuit breaker isolator switch that power distribution companies commonly use. The circuit breaker isolator switch is compatible, with the SFCT current transformer that is specifically designed for switchable circuit breaker isolator switches. The circuit breaker isolator switch matches the SFCT transformer because the transformer is built for the switching function and the voltage and current ratings line up. Why is the circuit breaker isolator switch compatible, with the SFCT current transformer?

-Slim profile engineered for tight spaces-Directly installable in SL1, SL2, and SL3 fuse disconnect switches-Compatible with distribution cabinet units, road power boxes, and public distribution boxes-Exceptional stability: No signal drift during current fluctuations, no operational interference-Commonly used in: Public feeder monitoring, residential access units, and automated monitoring modules for distribution company user cabinets (feeder poles) (load balancing/remote monitoring) -Engineer-approved features: Compact installation, strong anti-interference capability, and standardized solution endorsed by power distribution companies.

Practical Applications of Three Current Transformer Types, in Projects

We outline the applications to help the engineers make decisions.

Project Scenarios

Recommended CT Core Advantages-

Power Cabinet Retrofit: Power Cabinet Retrofit is a fit for on site maintenance. I have used Power Cabinet Retrofit in many, on site jobs. It works well.

DP Series Open CT: Fast-installation solution for industrial/commercial metering and distribution billing (5A–5000A)

I rely on the CP Series High‑Precision CT. The sealed design keeps the CP Series High‑Precision CT accurate, for applications.

SFCT Series Embedded CT: Space-efficient solution for fuse and circuit breaker integration Key Points: DP for retrofitting, CP for metering, SFCT current transformer for fuse integration.

Why do these CTs work well in the environment

Three primary environmental challenges in Egypt’s power projects: extreme temperatures (40°C–55°C), frequent sandstorms, and unstable grid power.

I have used the CT‑25 Cto+75 C product. I can confirm the performance of the CT‑25 Cto+75 C product.

– The CT‑25 Cto+75 C product handles a temperature range.

– The CT‑25 Cto+75 C product stays stable for a time, in high‑temperature areas.

– The CT‑25 Cto+75 C product works with frequencies from 50 to 400 Hz.

– The CT‑25 Cto+75 C product fits systems, industrial equipment and normal power distribution networks.

– The CT‑25 Cto+75 C product has anti‑interference ability, SFCT.

– The CT‑25 Cto+75 C product meets the stability needs of power distribution and automation systems.

– The CT‑25 Cto+75 C product provides insulation strength of 2.5 kV to 3 kV strength.

– The CT‑25 Cto+75 C product is suitable, for Egypt’s humid and salt‑spray environments.

Key concerns for engineers: Practical wiring and DP (open) applications Typical applications: Bus/cable through-hat, switchgear main output, factory load monitoring, AC output of solar inverters CP (metering CT) Typical applications: Metering (1A/5A secondary output), energy consumption monitoring.

Compay：HEYI Electrical Co., Ltd.

Brand: HEYI/ASCT

Contact: Bethy

E-mail: heyi@heyiele.com             

Tel: 86-13968747975

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