Current transformer ESS 50/5A

ESS 50/5 A current transformer

⚡ The ESS 50/5 A is a measuring current transformer designed to connect electricity meters, ammeters and monitoring devices to circuits carrying currents up to 50 A.

It converts the primary current into a standard 5 A secondary measuring current.

🔢 Meaning of 50/5 A

• 50 A — rated primary current;
• 5 A — rated secondary current;
• transformation ratio — 10:1.

Meter readings must be multiplied by 10 when this ratio is not programmed into the meter or AMR system.

🏭 Applications

• electricity meters with 5 A inputs;
• electrical panels;
• ammeters and measuring relays;
• technical energy metering;
• AMR systems;
• small commercial and industrial facilities.

🔌 Three-phase metering

A three-phase installation normally requires three identical 50/5 A current transformers, one for each phase.

🛡️ Critical safety rule

Never open the S1–S2 secondary circuit while primary current is flowing.

Before disconnecting the electricity meter, the secondary circuit must be short-circuited through an appropriate test terminal block.

⚙️ Construction

The Schetchik.uz listing specifies a support-type design and IP20 protection. The transformer must therefore be installed inside an enclosed electrical panel.

✅ Key advantages

• converts 50 A into a standard 5 A output;
• 10:1 transformation ratio;
• 50 Hz operation;
• compatible with 5 A electricity meters;
• no separate power supply required;
• suitable for AMR systems;
• IP20 protection;
• 36-month warranty.

⚠️ Important: confirm the accuracy class, VA burden and exact dimensions from the product marking and passport.