EATON EMT6-KDB Motor Protection Relay

(Заказ №.: 269471)

Тип продукта: Thermistor (ПТК) Реле защиты двигателя, Ex Explosion-proof, Dual Sensor Circuit

Итон Moeller EMT6 series for PTC thermistor temperature monitoring of motor windings.

K = ATEX explosion-proof certification; DB = Dual sensor input circuit

✅ Model Code Explanation

EMT6: Ряд, PTC thermistor motor protection relay

К: ATEX certified, suitable for Ex e explosion-proof motor applications

БД: Two independent PTC sensor input circuits (simultaneously monitor 2 temperature points, например. статор + bearing, or pre-alarm + путешествие)

Код заказа: 269471

✅ Key Features

Dual PTC circuit monitoring, two sensor channels evaluated independently to support pre-warning and protection logic
Sensor wire break and short-circuit detection (unique to K variants: detects not only wire breakage but also short circuits of sensor cables)
Zero-voltage safety protection (undervoltage lockout): the relay will not auto-reset after tripping due to power loss; configurable via DIP switch
Resettable modes: local manual reset / remote reset
Front panel Test/Reset button for commissioning to simulate over-temperature faults
Светодиоды состояния: power indication, индикация неисправности
СИЛ 1 уровень безопасности (ВАШ ОДИН 50495), suitable for temperature protection of explosion-proof equipment

✅ Electrical Specifications

Напряжение питания: 24～240V AC/DC wide range

Вспомогательный контакт: 1НЕТ + 1Северная Каролина (переключающий контакт), rated thermal current 6A

Тип датчика: PTC thermistor (130℃ / 150℃ PTC embedded in motor windings)

Thresholds: Over-temperature trip >1330Ой; перезагрузить <550Ой; sensor short-circuit fault <50Ой

Монтаж: DIN rail snap-on mounting, width 22.5mm

Терминалы: Винтовые клеммы, tightening torque 1.2Nm

Enclosure protection: IP20 (только для установки в шкаф)

Температура окружающей среды: Operating -25℃ ~ +60℃ (Макс. +45℃ for tightly sealed cabinets)

Стандарты: МЭК/EN 60947-8, АТЕХ, CE, UL, сертификация CCC

✅ Applications

Winding temperature protection for Ex-e increased safety explosion-proof motors (primary use case for K models)

Temperature protection for motors, gearboxes, pumps and fans via PTC thermistors

Dual-point temperature monitoring: например. one channel for winding over-temperature trip, one channel for bearing pre-alarm

Thermal protection for equipment in chemical, фармацевтический, coal and other explosion hazardous areas

✅ Comparison of Related Series Models

Модель	Номер заказа.	Нет. of Circuits
EMT6-K	269470	Одинокий
EMT6-KDB	269471	Двойной
EMT6-DB	66167	Двойной
EMT6-DBK	66168	Двойной

✅ Troubleshooting Guide

No LED on power-up: Check supply voltage 24~240V AC/DC
Fault LED steady ON:

PTC over-temperature (сопротивление >1330Ой)

Sensor circuit wire break

Sensor cable short-circuit (KDB exclusive detection function)

Cannot reset after trip: Zero-voltage lockout is activated; power cycle or disable undervoltage lockout via DIP switch
Тестовая функция: Press front Test button to simulate over-temperature and trigger relay trip

✅ Alternative Selection Reference

Same brand alternative: EMT6-DBK (without ATEX explosion-proof certificate, other functions similar)

Отечественная альтернатива: Domestic dual-channel PTC motor protection relay (примечание: for explosion-proof applications, domestic alternative must provide valid ATEX certificate for direct replacement of EMT6-KDB)

EATON EMT6-KDB Ambient Temperature Specifications

Open ventilated cabinet operating ambient temperature: -25℃ ～ +60℃
Sealed cabinet installation (плохой отвод тепла): -25℃ ～ +45℃ (reduced upper limit)
Температура хранения: -45℃ ～ +85℃

Дополнительные примечания:

Under UL/CSA certified operating conditions, the nominal rated ambient temperature on nameplate is 40℃

For ATEX explosion-proof applications, ATEX code ambient limits must be followed, not solely the 60℃ upper limit

EATON EMT6 Full Series Model List (PTC Thermistor Motor Protection Relay)

Abbreviation Definition

К: ATEX explosion-proof certified, supports sensor cable short-circuit detection

БД: Dual PTC sensor circuit

EMT62: Dual normally open contact version

(230В): Fixed 230V AC supply; no suffix = wide voltage 24~240V AC/DC

Модель	Номер заказа.	Sensor Circuits	Источник питания	Описание
EMT6	66166	Одинокий	24~240 В переменного/постоянного тока	Базовая модель, no short-circuit detection, non-explosion-proof
EMT6(230В)	66400	Одинокий	230В и	Single circuit, fixed 230V power supply
EMT6-DB	66167	Двойной	24~240 В переменного/постоянного тока	Dual circuit, no short-circuit detection, non-explosion-proof
EMT6-DB(230В)	66401	Двойной	230В и	Dual circuit, fixed 230V power supply
EMT6-DBK	66168	Двойной	24~240 В переменного/постоянного тока	Dual circuit with sensor short-circuit detection, no ATEX
EMT6-K	269470	Одинокий	24~240 В переменного/постоянного тока	Single circuit, ATEX certified, with short-circuit detection
EMT6-KDB	269471	Двойной	24~240 В переменного/постоянного тока	Dual circuit + АТЕХ + обнаружение короткого замыкания (target model)
EMT62	171889	Одинокий	24~240 В переменного/постоянного тока	Single circuit, dual NO output contacts
EMT62-DB	171890	Двойной	24~240 В переменного/постоянного тока	Dual circuit, dual NO output contacts

Руководство по быстрому выбору

Взрывоопасная зона (Ex-e motor) → EMT6-K / EMT6-KDB
Общая промышленность, require sensor cable short-circuit detection → EMT6-DBK
Общая промышленность, dual temperature monitoring, short-circuit detection not required → EMT6-DB
Two independent normally open alarm outputs required → EMT62 / EMT62-DB

EATON EMT6-KDB (Order No.269471) Физические размеры

DIN rail mounted; housing dimensions identical across all EMT6 variants

Ширина(Вт): 22.5 мм (nominal 23mm, standard 22.5mm DIN rail module width)

Высота(ЧАС): 83 мм

Глубина(Д): 103 мм (measured from DIN rail mounting surface to front face)

✅ Weight: 0.13 kg approx.

Примечания: