CHINT · NM8 / NM8S
Product overview
Select rated current first. The matching frame prefers S, then H where S is unavailable. Only the basic no-accessory configuration is offered here; request internal accessories separately.
CHINT NM8 andNM8S moulded-case breakers in the documented S breaking class. Select rated current first; frame, trip unit and Icu follow the exact catalogue compatibility.
Technical selection summary
| Parameter | Specification |
|---|---|
| Generation | NM8 thermal-magnetic;NM8S electronic. This is notNM8N orNM8N-HV |
| Pole scope | 3P or4P S-class range;2P original rows areH-class and not combined into this S-class listing |
| Thermal630frame | Maximum500A thermal-magnetic;630A belongs to electronicNM8S-630 |
| Selected Icu | Use the frame-specific Icu and voltage table below. Values at AC380/400V must not be extended automatically to AC415V. |
| Other voltage conditions | Max Ue690V in source; breaking capacity at660/690V must follow the exact source row, not the400V figure |
| Trip settings | Exact thermal/magnetic and electronic setting details retained in full catalogue |
| Installation | Fixed,plug-in,draw-out and terminal constructions have different dimensions; match selected actual construction |
Electronic andthermal-magnetic current ranges differ. H/R and alternatepole constructions in the full source are separate versions and are not freely combined with S-class selection.
Breaking capacity
| Frame | Icu and applicable voltage |
|---|---|
| NM8-125S | Icu: 50kA at AC380/400/415V |
| NM8-250S | Icu: 50 kA at AC380/400V Icu: 8 kA at AC660/690V |
| NM8-400S | Icu: 70kA at AC380/400/415V |
| NM8-630S | Icu: 70 kA at AC380/400V Icu: 10 kA at AC660/690V |
| NM8-800S | Icu: 50kA at AC380/400/415V |
| NM8-1250S | Icu: 50 kA at AC380/400V Icu: 10 kA at AC660/690V |
| NM8S-125S | Icu: 70kA at AC380/400/415V |
| NM8S-250S | Icu: 50 kA at AC380/400V Icu: 8 kA at AC660/690V |
| NM8S-400S | Icu: 70kA at AC380/400/415V |
| NM8S-630S | Icu: 70 kA at AC380/400V Icu: 10 kA at AC660/690V |
| NM8S-800S | Icu: 50kA at AC380/400/415V |
| NM8S-1250S | Icu: 50 kA at AC380/400V Icu: 10 kA at AC660/690V |
Typical applications
- Power distribution and industrial equipment control within the stated ratings
Product reference images and drawings
