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IPRU40‑40KA is a Type 2 pluggable AC surge protective device (เอสพีดี) from Schneider Electric’s Acti9 series.
Key specifications: maximum discharge current 40 kA, nominal discharge current 20 kA, maximum continuous operating voltage 350 V AC.
It uses metal oxide varistor (มธ) technology and is suitable for lightning and surge protection in power distribution networks with TT/TN‑S earthing systems.
- Model Explanation
| Code | ความหมาย | คำอธิบาย |
| IPRU | ชุด | Pluggable SPD of Schneider Acti9 series, supports hot‑swap module replacement for easy maintenance |
| 40 | Maximum discharge current (Imax) | 40 kA (8/20 μs waveform) |
| 40KA | Nominal discharge current (In) | 20 kA (8/20 μs waveform) (บันทึก: 40KA in model corresponds to In = 20 kA) |
| 350วี | Maximum continuous operating voltage (UC) | 350 V AC, suitable for 400 V three‑phase and 230 V single‑phase systems |
| ป | Number of poles | 1พี+เอ็น / 2ป / 3พี+เอ็น / 4ป |
- Key Technical Specifications
| รายการ | ค่า | บันทึก |
| Protection class | Type 2 | Complies with IEC 61643‑11:2011 & EN 61643‑11:2012 |
| Discharge current | In = 20 kA, Imax = 40 kA (8/20 μs) | Common mode (CM) & differential mode (DM) |
| Voltage protection level (ขึ้น) | ≤ 1.8 kV (DM), ≤ 1.4 kV (CM) | Low residual voltage |
| เวลาตอบสนอง | ≤ 25 ns | Nanosecond‑level response |
| Operating voltage | Ue = 230/400 V AC, 50/60 Hz | Standard low‑voltage distribution |
| Max continuous voltage (UC) | 350 V AC (DM), 260 V AC (CM) | Stable under grid fluctuations |
| Ingress protection | IP40 front, IP20 terminals | Industrial environment suitable |
| อุณหภูมิในการทำงาน | ‑25 °C to +60 °C | Wide temperature range |
| การติดตั้ง | 35 mm standard DIN rail | Compatible with Acti9 circuit breakers |
| Wiring | Max 35 mm², recommended 16 mm² solid / 25 mm² flexible | Good conductivity & heat dissipation |
| ขนาด | Width varies with poles (2ป:45 mm, 3พี+เอ็น:72 mm, 4ป:90 mm), H85 mm, D65 mm | การออกแบบที่กะทัดรัด |
| น้ำหนัก | Approx. 200–450 g (depends on poles) | Lightweight |
| Earthing system | TT / TN‑S | Not suitable for TN‑C |
- Key Advantages & การใช้งาน
- ข้อดี
Pluggable design: Hot‑swap module without power interruption
บำรุงรักษาง่าย: Local status indicator (green = normal, red = fault)
มีความน่าเชื่อถือสูง: MOV technology, long service life, strong anti‑aging
Safe design: Built‑in thermal disconnector to prevent fire risk
Strong compatibility: Fully compatible with Schneider Acti9 series
- การใช้งานทั่วไป
| Field | แอปพลิเคชัน | Protected Equipment |
| Industrial automation | Workshop power, PLC cabinets, VFDs | Automation equipment, เซ็นเซอร์ |
| Commercial buildings | Offices, malls, hotels | Lifts, HVAC, security, networks |
| Infrastructure | ศูนย์ข้อมูล, telecom, transport | Servers, การสื่อสาร, monitoring |
| New energy | PV inverters, wind converters | Power electronic devices |
| ที่อยู่อาศัย | Distribution boards, smart homes | Household appliances |
- โมเดลทั่วไป & Pole Configurations
| Full Model | Poles | Order No. | แอปพลิเคชัน |
| IPRU40‑40KA 1P+N 350V | 1พี+เอ็น | A9L040200 | Single‑phase 2‑wire |
| IPRU40‑40KA 2P 350V | 2ป | A9L040300 | Single‑phase 3‑wire |
| IPRU40‑40KA 3P+N 350V | 3พี+เอ็น | A9L040600 | Three‑phase 4‑wire |
| IPRU40‑40KA 4P 350V | 4ป | A9L040400 | Three‑phase 4‑wire (full‑pole) |
- Selection & Usage Notes
- Coordination: Used as Type 2 protection, cooperate with Type 1 (e.g. IPR 120KA)
- Pole selection: 3P+N/4P for three‑phase; 2P/1P+N for single‑phase
- การติดตั้ง: Incoming side of main / sub‑distribution board, after circuit breaker
- Backup protection: Series 16–32A circuit breaker (breaking capacity ≥ 50 kA)
- Wiring: Short and thick copper cable, length ≤ 50 cm
- Maintenance: Check indicator regularly; replace module when red (typical 5–8 years)
- Difference Between IPRU40 & IPRD40
| Feature | IPRU40 | IPRD40 | คำอธิบาย |
| Module type | Basic pluggable | Pluggable with remote indication | IPRD40 supports remote signal |
| สถานะ | Local LED | Local LED + remote contact | 1 C/O dry contact |
| Order No. | A9L040xxx | A9L40xxx | Different prefix |
| ราคา | Lower | Higher | Due to remote function |
- Full List of Schneider Surge Protective Devices (Acti9 Series)
- Pluggable Type (iPRU / iPRD, Type 2, mainstream)
| ชุด | แบบอย่าง | Imax / In | UC | Poles | Order No. | บันทึก |
| iPRU (Basic) | IPRU10‑10KA | 10 kA / 5 kA | 350 V | 1P+N/2P/3P+N/4P | A9L010xxx | Local indication |
| IPRU20‑20KA | 20 kA / 10 kA | 350 V | 1P+N/2P/3P+N/4P | A9L020xxx | General Type 2 | |
| IPRU40‑40KA | 40 kA / 20 kA | 350 V | 1P+N/2P/3P+N/4P | A9L040xxx | Your model | |
| IPRU65‑65KA | 65 kA / 30 kA | 350 V | 1P+N/2P/3P+N/4P | A9L065xxx | High current | |
| IPRU100‑100KA | 100 kA / 50 kA | 350 V | 3P+N/4P | A9L100xxx | High energy | |
| iPRD (Remote) | iPRD10/20/40/65 | Same as iPRU | 350 V | 1P+N/2P/3P+N/4P | A9L40xxx | With remote dry contact |
- Fixed Type (iST / iPR, Type 2)
iST series: iST20, iST40, iST65 (Imax 20/40/65 kA), order no. A9L916xxx
iPR series: iPR20, iPR40, iPR65 (older fixed type, gradually replaced by iPRU)
- Type 1 / Combined Type 1+2
iPRF1‑12.5r: Type 1, Imax = 12.5 kA (10/350 μs), 3P+N/4P, A9L012xxx
iPRD1‑15r/20r/25r: Type 1+2, Imax = 15/20/25 kA, 3P+N/4P
- Special Series
iPRU‑DC: For PV DC systems (500 V / 1000 V DC)
iPTU: For low‑voltage signal lines
EA9L: Easy9 economical fixed type
- Cross‑Brand Replacements for IPRU40‑40KA
(Type 2, Imax = 40 kA, In = 20 kA, Uc ≈ 350 V)
- Siemens 5SD7 Series
5SD7462‑6CN: 2ป, 40 kA/20 kA, 350 V, pluggable
5SD7464‑6CN: 4ป, 40 kA/20 kA, 350 V, pluggable
5SD7466‑6CN: 3พี+เอ็น, 40 kA/20 kA, 350 V, pluggable
- ABB OVR T2 Series
OVR T2 2L 40‑320 P U: 2ป, 40 kA/20 kA, 320 V
OVR T2 4L 40‑320 P U: 4ป, 40 kA/20 kA, 320 V
OVR T2 3N 40‑320 P U: 3พี+เอ็น, 40 kA/20 kA, 320 V
- Chinese Brands (Cost‑effective)
CHINT NU6‑II 40 kA/20 kA: 350 V, 1P+N/2P/3P+N/4P
DELIXI DZ47Y 40 kA/20 kA: 350 V, all poles
ZHONGLI ZL1‑40/2‑350: Type 2, 40 kA/20 kA, 350 V
III. Schneider Internal Replacements
Downsizing: IPRU20‑20KA (Imax = 20 kA), for low surge environments
Equal replacement: iPRD40‑40KA (with remote signal)
Upgrading: IPRU65‑65KA (Imax = 65 kA), higher surge protection
- Selection & Replacement Rules
- Match core parameters: Imax, In, UC, Type 2, poles must be consistent
- Mounting compatible: 35 mm DIN rail, similar width
- Function difference: iPRD / 5SD7 / OVR have remote contacts; iPRU only local indication
- System suitable: All for TT/TN‑S, not for TN‑C
