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The type 2 surge protective Device is applicable to discharge overvoltage caused by switch-type (8/20μs wave-form) over currents. The type 2 arresters must be installed into sub-distribution boards (at condominium into distribution boards of flats) after main distribution boards containing type 1 arresters. For proper operation at least 10-15 m cable or wire must be placed between type 1 and type 2 arresters. Otherwise, a decoupling coil has to be installed between the two devices. These protectors are modular types with changeable insert; the auxiliary contact is built-in into the housing of the device.
| Model | EKU4-20 | EKU4-40 | EKU4-B+C | EKU4-60 | EKU4-80 | EKU4-100 | |||||||||
| Tpye | D | C | B+C | B | B | B | |||||||||
| Rated Voltage (Un) | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | |||
| Maximum Continuous Operation Voltage (Uc) | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | 275V | 385V | |||
| Voltage Protection Level (Up) | 1.2kV | 1.5kV | 1.3kV | 1.6kV | 1.5kV | 2.0kV | 1.4kV | 2.0kV | 1.6kV | 2.2kV | 2.0kV | 2.5kV | |||
| Nominal Discharge Current In (8/20μs) | 10kA | 10kA | 20kA | 20kA | 30kA | 30kA | 30kA | 30kA | 40kA | 40kA | 60kA | 60kA | |||
| Maximum Discharge Current Imax (8/20μs) | 20kA | 20kA | 40kA | 40kA | 50kA | 50kA | 60kA | 60kA | 80kA | 80kA | 100kA | 100kA | |||
| Maximum Discharge Current Imax (10/350μs) | 7KA | 7KA | |||||||||||||
| Reaction Time | ＜25ns | ＜25ns | ＜25ns | ＜25ns | ＜25ns | ＜25ns | |||||||||
| Test Level | T2 | T2 | T1+T2 | T2 | T2 | T2 | |||||||||
| Width/Pole | 18mm | 18mm | 18mm | 18mm | 18mm | 18mm | |||||||||
| Color Mark | |||||||||||||||
| Shell Material | PBT | PBT | PBT | PBT | PBT | PBT | |||||||||
| Ambient Temperature | -40℃~80℃ | -40℃~80℃ | -40℃~80℃ | -40℃~80℃ | -40℃~80℃ | -40℃~80℃ | |||||||||
| Fuse or Circuit Breaker Matched | 20A | 25A | 32A | 32A | 32A | 40A | |||||||||
| Terminal Specification |
Line | 2.5~35mm2 | 2.5~35mm2 | 2.5~35mm2 | 2.5~35mm2 | 2.5~35mm2 | 2.5~35mm2 | ||||||||
| PE | 4.0~35mm2 | 4.0~35mm2 | 4.0~35mm2 | 4.0~35mm2 | 4.0~35mm2 | 4.0~35mm2 | |||||||||
| Signal | 1.5mm2 | 1.5mm2 | 1.5mm2 | 1.5mm2 | 1.5mm2 | 1.5mm2 | |||||||||
| No.of Pole | 1P, 2P, 3P, 4P, 1P+N, 2P+N, 3P+N | ||||||||||||||
| Protection Degree | IP20 | ||||||||||||||
| Mounting | DIN rail 35mm | ||||||||||||||
| Network System | TN, TT, IT | ||||||||||||||
| Signal Terminal | Available | ||||||||||||||
| SPD Type Reference List | ||||||
| Poles | 275V | |||||
| 20KA | 40KA | 50KA | 60KA | 80KA | 100KA | |
| 1P | EKU4-20-1-275 | EKU4-40-1-275 | EKU4-B+C-1-275 | EKU4-60-1-275 | EKU4-80-1-275 | EKU4-100-1-275 |
| 2P | EKU4-20-2-275 | EKU4-40-2-275 | EKU4-B+C-2-275 | EKU4-60-2-275 | EKU4-80-2-275 | EKU4-100-2-275 |
| 3P | EKU4-20-3-275 | EKU4-40-3-275 | EKU4-B+C-3-275 | EKU4-60-3-275 | EKU4-80-3-275 | EKU4-100-3-275 |
| 4P | EKU4-20-4-275 | EKU4-40-4-275 | EKU4-B+C-4-275 | EKU4-60-4-275 | EKU4-80-4-275 | EKU4-100-4-275 |
| 1P+N | EKU4-20-1N-275 | EKU4-40-1N-275 | EKU4-B+C-1N-275 | EKU4-60-1N-275 | EKU4-80-1N-275 | EKU4-100-1N-275 |
| 3P+N | EKU4-20-3N-275 | EKU4-40-3N-275 | EKU4-B+C-3N-275 | EKU4-60-3N-275 | EKU4-80-3N-275 | EKU4-100-3N-275 |
| 320V | ||||||
| 1P | EKU4-20-1-320 | EKU4-40-1-320 | EKU4-B+C-1-320 | EKU4-60-1-320 | EKU4-80-1-320 | EKU4-100-1-320 |
| 2P | EKU4-20-2-320 | EKU4-40-2-320 | EKU4-B+C-2-320 | EKU4-60-2-320 | EKU4-80-2-320 | EKU4-100-2-320 |
| 3P | EKU4-20-3-320 | EKU4-40-3-320 | EKU4-B+C-3-320 | EKU4-60-3-320 | EKU4-80-3-320 | EKU4-100-3-320 |
| 4P | EKU4-20-4-320 | EKU4-40-4-320 | EKU4-B+C-4-320 | EKU4-60-4-320 | EKU4-80-4-320 | EKU4-100-4-320 |
| 1P+N | EKU4-20-1N-320 | EKU4-40-1N-320 | EKU4-B+C-1N-320 | EKU4-60-1N-320 | EKU4-80-1N-320 | EKU4-100-1N-320 |
| 3P+N | EKU4-20-3N-320 | EKU4-40-3N-320 | EKU4-B+C-3N-320 | EKU4-60-3N-320 | EKU4-80-3N-320 | EKU4-100-3N-320 |
| 385V | ||||||
| 1P | EKU4-20-1-385 | EKU4-40-1-385 | EKU4-B+C-1-385 | EKU4-60-1-385 | EKU4-80-1-385 | EKU4-100-1-385 |
| 2P | EKU4-20-2-385 | EKU4-40-2-385 | EKU4-B+C-2-385 | EKU4-60-2-385 | EKU4-80-2-385 | EKU4-100-2-385 |
| 3P | EKU4-20-3-385 | EKU4-40-3-385 | EKU4-B+C-3-385 | EKU4-60-3-385 | EKU4-80-3-385 | EKU4-100-3-385 |
| 4P | EKU4-20-4-385 | EKU4-40-4-385 | EKU4-B+C-4-385 | EKU4-60-4-385 | EKU4-80-4-385 | EKU4-100-4-385 |
| 1P+N | EKU4-20-1N-385 | EKU4-40-1N-385 | EKU4-B+C-1N-385 | EKU4-60-1N-385 | EKU4-80-1N-385 | EKU4-100-1N-385 |
| 3P+N | EKU4-20-3N-385 | EKU4-40-3N-385 | EKU4-B+C-3N-385 | EKU4-60-3N-385 | EKU4-80-3N-385 | EKU4-100-3N-385 |
The type 2 surge protective Device is applicable to discharge overvoltage caused by switch-type (8/20μs wave-form) over currents. The type 2 arresters must be installed into sub-distribution boards (at condominium into distribution boards of flats) after main distribution boards containing type 1 arresters. For proper operation at least 10-15 m cable or wire must be placed between type 1 and type 2 arresters. Otherwise, a decoupling coil has to be installed between the two devices. These protectors are modular types with changeable insert; the auxiliary contact is built-in into the housing of the device.
