Core Difference Analysis between P3U30-5AAA2BBAA and P3U30-5AAA2BBAC

Both models belong to the Schneider PowerLogic/Easergy P3U30 Series Universal Protection Relay. The core difference lies only in the last two characters (AA vs AC). The complete structure analysis is as follows:

2. Key Specification Comparison Table

3. Detailed Description of Differences

3.1 Digital Input Voltage Difference

P3U30-5AAA2BBAA (REL52002): Fixed digital input of 220V AC/DC, suitable for standard industrial control voltage environments.

P3U30-5AAA2BBAC (REL52008): Wide-range digital input of 110-230V AC/DC, compatible with more international standard voltages with higher flexibility.

3.2 Communication Capability Difference (Core Distinction)

P3U30-5AAA2BBAA: Equipped with only RS485 serial communication, suitable for simple point-to-point communication; does not support network integration or remote monitoring.

P3U30-5AAA2BBAC: Equipped with dual RJ45 Ethernet ports + พอร์ตอนุกรม RS485, สนับสนุน:

Redundant Ethernet communication (RSTP/PRP protocol)

ไออีซี 61850 substation communication standard (Ed.1/Ed.2)

Modern industrial protocols such as Modbus TCP, DNP3, อีเทอร์เน็ต/ไอพี

Remote configuration, monitoring and firmware upgrade

3.3 Application Scenario Adaptation

4. คำแนะนำในการคัดเลือก
5. Communication Requirement Judgment

Local communication or simple SCADA connection only: Choose AA version (REL52002)

ไออีซี 61850, remote monitoring or network redundancy required: Must choose AC version (REL52008)

2. Digital Input Voltage Adaptation

System unified with 220V control voltage: AA version fully compatible

Mixed 110V/220V control voltage or uncertain future demands: Choose AC version with wide-range input

3. ความสามารถในการขยายในอนาคต

The dual Ethernet port design of AC version reserves space for future system upgrades and supports advanced smart grid applications.

5. Supplementary Information

Hardware Compatibility: Both models have identical physical dimensions and mounting methods, enabling direct interchangeable installation.

ฟังก์ชั่นการป้องกัน: Both provide more than 40 protection functions including overcurrent, ความผิดของโลก, แรงดันตก, phase sequence reversal, ฯลฯ, meeting feeder and motor protection requirements.

การรับรอง: Both comply with international standards such as IEC 60255 และภาษาอังกฤษ 61850 for global market application.

Communication Interface Difference: P3U30-5AAA2BBAA vs P3U30-5AAA2BBAC

P3U30-5AAA2BBAA has only an RS485 serial port without Ethernet; P3U30-5AAA2BBAC retains RS485 and adds dual RJ45 Ethernet ports to support network communication.

1. Detailed Communication Interface Comparison

2. Key Difference Summary
3. AA Version: Pure serial port type

Only RS485 interface, limited to traditional RS485 bus networking; cannot connect to switches, access Ethernet, or support IEC61850.

2. AC Version: Hybrid type with serial port + dual Ethernet ports

Retains the original RS485 interface and adds 2 RJ45 ports, which can be directly connected to industrial switches, form ring networks, and support IEC61850 & Modbus TCP network communication.

3. Simple Selection Rule

Only RS485 communication for traditional cabinet internal connection → Choose P3U30-5AAA2BBAA

Require Ethernet, remote networking, smart substation or IEC61850 → Must choose P3U30-5AAA2BBAC

Schneider PowerLogic P3U30 Series Universal Protection Relay Model List

1. Model Coding Rule (Full Interpretation)

The P3U30 series adopts the format P3U30-XXXXXXXX with 14 ตัวอักษร. The definition of each segment is as follows:

2. รายการรุ่นที่สมบูรณ์ (Classified by Communication Interface)

2.1 RS485 Serial Communication Only (Without Ethernet)

2.2 Dual RJ45 Ethernet + RS485 Communication (Smart Type)

2.3 โมเดลการกำหนดค่าพิเศษ (Wide Temperature / Extended Functions)

3. Key Parameter Overview Comparison

4. แผนภูมิการเลือกด่วน (By Core Requirement)

5. Supplementary Information
6. Hardware Compatibility: All P3U30 models share identical physical dimensions (96×96×75mm) and mounting methods (รางปีกนก / การติดตั้งแผง) for direct interchangeable installation.
7. ฟังก์ชั่นการป้องกัน: All models offer 40+ protection functions including overcurrent (ฉัน>>), ความผิดของโลก (Ig), แรงดันตก (คุณ<), phase sequence reversal, โอเวอร์โหลด, ฯลฯ, สอดคล้องกับ IEC 60255 มาตรฐาน.
8. การรับรอง: Compliant with CE, แอล, ซีเอสเอ, ไออีซี 61850 and other international certifications for global market use.
9. อัพเกรดเฟิร์มแวร์: Ethernet models support remote firmware upgrade; RS485 models require local upgrade.
10. รายการอุปกรณ์เสริม:

Front Connector: Standard 9-pin spring terminal

Communication Cable: RS485 shielded twisted pair (ไม่จำเป็น)

Ethernet Cable: CAT5e/CAT6 industrial Ethernet cable (Ethernet models only)