What is a Surge Protective Device (SPD)?
A Surge Protective Device (SPD) is an essential electrical component designed to protect electrical equipment from damage caused by sudden voltage spikes, known as surges. These surges can result from
• SM8HU series of molded case circuit breakers with rated voltages up to AC1000V and currents up to 400A..
• SM8HU series molded case circuit breakers have an interrupting capacity of up to 30kA at AC800V, enabling reliable system short circuit protection.
• International CertificationTUV、CCC、CB.
| Model | SM8-320HU | SM8-400HU | SM8-630HU | SM8-800HU | ||||||||
| Rated frame current Inm (A) | 320 | 400 | 630 | 800 | ||||||||
| Rated current In (A) | 125, 140, 160, 180, 200, 250, 280, 300, 315, 320 |
225,250,315,350,400 | 400,500,630 | 630,700,800 | ||||||||
| Numbers of poles | 3 | 3 | 3、4 | 3、4 | ||||||||
| Rated service voltage Ue(V)AC | 690,800,1000 | |||||||||||
| Rated insulation voltage Ui(V) | 1000 | |||||||||||
| Rated impulse withstand voltage Uimp (KV) | 8 | 12 | 12 | 12 | ||||||||
| Utimate short circuit breaking capacity Icu (kA) | 30 | 30 | 12 | 30 | 30 | 12 | 30 | 30 | 12 | 30 | 30 | 12 |
| Wiring method | 23 | 23 | 12 | 23 | 23 | 12 | 23 | 23 | 12 | 23 | 23 | 12 |
| Mechanical life(No.Operations) | Top in and bottom out | |||||||||||
| Electrical life(No. Operations) | 1000 | 1000 | 1000 | 1000 | ||||||||
| Availbility of isolation characteristics | 2000 | 2000 | 2000 | 2000 | ||||||||
| Standards | Yes | |||||||||||
| Allowable ambient temperature | IEC 60947-2.GB/T 14048.2 | |||||||||||
| Degree of protection | -40~+70℃ | |||||||||||
| Available accessories | IP20 | |||||||||||
| Arcing distance (mm) | Auxiliary contacts, alarm contacts, shunt release, manual operation, electric operation | |||||||||||
| Instantaneous action value | 10In | |||||||||||
| Dimensions L xWxH (mm) | 180×107×126 (3P) | 258×150×107 (3P) | 280×210×115.5 (3P) | 280×210×115.5 (3P) | ||||||||
| Installation methods | Fixed or withdrawable | |||||||||||
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