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. تفسير رمز النموذج (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, التيار الزائد, ارتفاع درجة الحرارة, stall, unbalance protection, إلخ.).

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

م: CT input type (1أ / 5أ).

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

D28: I/O configuration (على سبيل المثال: 16 المدخلات الرقمية / 16 مخرجات التتابع).

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

2. الوظائف الأساسية & Protection Features
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. قياس & Monitoring

Three-phase current, الجهد االكهربى, قوة, تكرار, عامل الطاقة

RTD temperature monitoring (windings, bearings, cooling medium)

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

3. تواصل & Control

معيار: مودبوس ار تي يو

خياري: اللجنة الانتخابية المستقلة 61850, Profibus DP, DNP3.0

Programmable logic (بلك), remote switching, تسجيل خطأ

3. التطبيقات النموذجية

High-voltage induction/synchronous motors (مضخات المياه, المشجعين, الضواغط, rolling mills)

Protection of generators and large rotating machinery

Critical motor circuits in industry, قوة, علم المعادن, petrochemical, municipal engineering, إلخ.

4. المعلمات التقنية (Reference)

Operating power supply: 24–240V AC/DC (wide range)

CT input: 1A or 5A

I/O: 16 من / 16 يفعل (مخرجات التتابع)

الحق في التنمية: 6–10 channels Pt100/Pt1000

دقة: Current ±0.2%, Voltage ±0.5%

Ambient: -25درجة مئوية ~ +70 درجة مئوية, 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)