---
lang: "en"
title: "Current Transformer – Ac/Dc Trms – 50a Loop Powered"
sku: "QI-50-I"
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end_of_life: "false"
---

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QI-50-I:Current Transformer – Ac/Dc Trms – 50a Loop Powered

The QI-50-I is an AC/DC current transformer, galvanically isolated from the measuring circuit. The device is similar in function and appearance to a standard active CT, but is capable of measuring both DC and TRMS AC components.

The transducer is powered by a 4-20mA current loop and therefore does not require a direct power supply. It is the first loop-powered Hall effect transformer with 0.5% accuracy available on the market.

TRMS AC/DC loop powered current transformer, 0…50 A bipolar, 4…20 mA analog output on loop, scale settable via Dip-Switch, designed for DIN rail mounting both vertically and horizontally.

## Features

- POWER SUPPLY: Passive current loop, 11…30Vdc, Protections for reverse polarity and over-temperature.
- ABSORPTION: Less than 3.5mA
- PROTECTION RATING: IP20
- ACCURACY CLASS: 0.5% F.S.
- RESOLUTION: 12 bit
- TEMPERATURE COEFFICIENT: < 200 ppm/°C
- RESPONSE SPEED: 1000 ms
- HYSTERESIS ON MEASUREMENT: 0.15% f.s.
- OPERATING TEMPERATURE: -15…+65°C
- MEASUREMENT TYPE: RMS (unipolar) or DC
- RANGES: ±50 Arms or ±25 Arms settable by dip-switch
- CREST FACTOR: 1.8
- BANDWIDTH: DC or 20…2000 Hz
- ISOLATION: 3 kV on bare cable
- OVERLOAD: 2000 A impulsive, 300 A continuous
- OUTPUT: 4…20 mA

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Source: https://shop.marcomweb.it/en/voltage-current-phase/current-transformer-acdc-trms-50a-loop-powered

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