CHINT · Air circuit breaker
Product overview
Choose rated current, frame, poles, controller, fixed/drawout installation, operation and secondary control voltage. Only source-backed combinations are enabled. NA1-4000X is 3P only; NA1-6300X is drawout only, and 6300A is 3P only. DC control voltage refers to the secondary circuit, not a DC main circuit. 200A/400A selections use catalogue-supported standard-M, motor-operated configurations with AC220/230 control supply. Specify other releases and accessories with the enquiry.
CHINT NA1 air circuit breakers provide selective protection in low-voltage main distribution. Specify the frame, actual current rating and intelligent controller separately, then match the installation and secondary control supply to the switchboard.
Technical selection summary
| Series | NA1 |
|---|---|
| Catalogue current coverage | 200–6300 A, depending on frame |
| Frame sizes | 1000, 2000, 3200, 4000 and 6300 A |
| Main circuit | AC 400 V or 690 V, 50/60 Hz |
| Installation | Fixed or drawout |
| Poles | 3P or 4P |
| Protection selection | M standard or H communication controller for the retained X-version references; controller code is separate from frame breaking capacity |
| Controller protection reference | The NA1 manufacturer catalogue describes L overload long delay, S short-circuit short delay and I instantaneous protection. Earthing/neutral protection and further functions depend on the specified controller/configuration; confirm the complete controller code and settings |
| NA1-1000X fault-duty example | The manufacturer table lists Icu of 42 kA at 400 V AC and 25 kA at 690 V AC for NA1-1000X. These are model- and voltage-specific references |
| NA1-4000X fault-duty example | For NA1-4000X, the source lists Icu of 100 kA at 400 V AC and 65 kA at 690 V AC. Match the full suffix rather than using one rating for the entire NA1 series |
| Higher-frame distinction | NA1-6300X is a separate table entry: Icu 120 kA at 400 V AC and 85 kA at 690 V AC. Other frame and suffix entries have their own values |
Typical applications
- Main low-voltage switchboards
- Industrial distribution incomers
- Building distribution systems
