Schneider Electric P243-311A2MCD28M

comprehensive protection relay Schneider Electric P243-311A2MCD28M

P243-311A2MCD28M is a comprehensive protection relay for rotating machines (motors/generators) from Schneider Electric’s MiCOM P243 series. It is a high-end digital protection device mainly used for the full protection, control and monitoring of large motors and synchronous motors.

1. Интерпретация кода модели (P243-311A2MCD28M)

P243: Base series, motor differential protection and integrated management relay.

3: Hardware configuration/version (corresponding to I/O, power supply and interface combination).

11: Protection function configuration (including complete motor protection such as differential, сверхток, перегрев, stall, unbalance protection, и т. д.).

A2: Auxiliary power supply rating (typically 220–240V AC/DC or 110V DC, subject to nameplate).

М: CT input type (1А / 5А).

С: Communication interface (including Modbus RTU, optional IEC 61850, Profibus DP).

D28: I/O configuration (например: 16 цифровые входы / 16 релейные выходы).

М: RTD temperature monitoring (supports 6–10 platinum resistance thermometers for winding/bearing temperature measurement).

2. Основные функции & Функции защиты
3. Main Protection

87 Motor differential protection (phase-to-phase/turn-to-turn faults)

50/51 Overcurrent/instantaneous overcurrent, 49 Stator overheating, 48 Stall/locked rotor

51N/50N Earth-fault overcurrent, 37 Underpower/overpower, 24 Speed supervision

2. Измерение & Мониторинг

Three-phase current, Напряжение, власть, частота, коэффициент мощности

RTD temperature monitoring (windings, bearings, cooling medium)

Motor operating hours, start count statistics, event recording (1000+ записи)

3. Коммуникация & Control

Стандартный: Модбус РТУ

Необязательный: МЭК 61850, Profibus DP, DNP3.0

Programmable logic (ПЛК), remote switching, fault recording

3. Типичные применения

High-voltage induction/synchronous motors (водяные насосы, фанаты, компрессоры, rolling mills)

Protection of generators and large rotating machinery

Critical motor circuits in industry, власть, metallurgy, petrochemical, municipal engineering, и т. д..

4. Технические параметры (Reference)

Operating power supply: 24–240 В переменного/постоянного тока (wide range)

CT input: 1А или 5А

I/O: 16 ОТ / 16 ДЕЛАТЬ (релейные выходы)

РТД: 6–10 channels Pt100/Pt1000

Точность: Current ±0.2%, Voltage ±0.5%

Ambient: -25°С ~ +70°С, front panel IP54

5. Differences Within the Same Series

P241: Standard motor protection (without differential)

P242: Enhanced motor protection

P243: Top configuration with differential protection (corresponding to model P243-xxxx)