The KPA385-25 series is Class I/Type 1 and 2/4 poles AC power Surge Protective Device (SPD) designed for low-voltage power system ligtning current&surge protection especially for location of high risk exposure or building entrances ( IEC 62305-4) to against the damage from direct or close lightning strikes,capacity up to 25 kA (10/350 μs). This AC power surge protector feature modular design, achieving overcurrent protection, instantaneous response, and timely tripping,circuit for use in one-phase/three-phase 230/400 V TT and TN-S systems.This effectively prevents fires and protects systems or equipment from permanent damage or momentary interruption caused by surges, enhancing the safety and stability of power distribution systems.
230/400 V AC
Modular design
35mm DIN rail mounting
Trigger spark gap technology
Temperature control cut-out technology
Reliable thermo disconnect technology
Overcurrent protection
Instantaneous action and timely trip
25 kA (10/350 μs) Lightning Impulse Current
Visual status indicator
Remote signal contacts
Space-saving and cost-effective
Building entrances
Power supply system
Infrastructure Critical Facilities
Industrial Sites Electrical System Interfaces
- Installation must be carried out under power-off conditions. Secure the surge protector KPA385-25 and circuit breaker to the rail respectively, and connect L, N, PE, etc. as shown in the diagram.
- Regularly check the working status of the surge protector. Replace the product immediately if it fails or is damaged.
| Electrical | ||
Model | KPA385-2520 | KPA385-2511 |
Number of Positions | 2-pos. | 2-pos. |
SPD Type per UL 1449 3rd Edition | Type 1 | Type 1 |
SPD Class per IEC 61643-11 | Class I | Class I |
Nominal Operating AC Voltage[Un] | 100-240 V (50/60 Hz) | 100-240 V (50/60 Hz) |
Max. Continuous Operating AC Voltage[Uc] | 385 V (50/60 Hz) | 385 V (50/60 Hz) |
Response time[tA] | ≤ 25 ns | ≤ 25 ns |
Nominal Discharge Current [In] | 12.5 kA (10/350 μs) | 12.5 kA (10/350 μs) |
Lightning impulse Current [limp] | 25 kA (10/350 μs) | 25 kA (10/350 μs) |
Protection Mode | L/N-G | L/N, N-G |
Voltage Protection Level [Up] | 2500 V | 2500 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
| Electrical | ||
Model | KPA385-2540 | KPA385-2531 |
Number of Positions | 4-pos. | 4-pos. |
SPD Type per UL 1449 3rd Edition | Type 1 | Type 1 |
SPD Class per IEC 61643-11 | Class I | Class I |
Nominal Operating AC Voltage[Un] | 200-415 V (50/60 Hz) | 200-415 V (50/60 Hz) |
Max. Continuous Operating AC Voltage[Uc] | 385 V (50/60 Hz) | 385 V (50/60 Hz) |
Response time[tA] | ≤ 25 ns | ≤ 25 ns |
Nominal Discharge Current [In] | 12.5 kA (10/350 μs) | 12.5 kA (10/350 μs) |
Lightning impulse Current [limp] | 25 kA (10/350 μs) | 25 kA (10/35 0μs) |
Protection Mode | L1/l2/L3/N-G | L1/l2/L3/N,N-G |
Voltage Protection Level [Up] | 2500 V | 2500 V |
Degradation Failure Iindication | Red - failure,Green - Normal | Red - failure,Green - Normal |
Remote Signal Contact | Optional | Optional |
| Mechanical | ||
Connection Mode | Parallel | |
Wiring diameter | 4-25 mm² | |
Mounting Method | 35mm DIN-rail | |
Housing Material | Thermoplastic,Extinguishing Degree UL94 V 0 | |
Environmental Ingress Protection Rating | IP20 | |
Enclosure Color | Black | |
Operating Temperature (℃) | -40 ℃ to +80 ℃ | |
Dimensions (L×W×H) | 1-Phase: 90 × 72 × 65 mm 3-Phase: 90 × 144 × 65 mm | |
Weight | 1-Phase: 350 g 3-Phase: 700 g | |
| Standards Compliance&Certifications | ||
Standards | UL 1449 3rd Edition: 2011, IEC 61643-11: 2011, EN 61643-11:2012, IEEE C62.11: 2005, IEEE C62.41: 2002, IEEE C62.45: 2002, NEMA LS-1 | |
| Certifications | CE | |
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