CHINT · NH40SZ 1250A 4P Automatic Changeover Switch
Product overview
CHINT NH40SZ transfers the 1250A,4-pole load between two supplies. Select the common,SZI,SZII or SZIII controller to match mains/mains or mains/generator operation.
Technical selection summary
| This page current / poles | 1250A;4P; switched neutral on4P |
|---|---|
| Main circuit / control supply | AC400V main circuit in the retained technical table;AC220V control;50Hz |
| Common SZ | Automatic changeover and automatic return; normal supply has priority |
| SZI | Mains/mains mutual standby; no automatic return while the standby source remains healthy |
| SZII | Mains/mains automatic changeover and automatic return; phase-loss,overvoltage and undervoltage detection |
| SZIII | Mains/generator automatic changeover and return; generator start signal and warm-up/cool-down control |
| Transfer function | Automatic,remote and manual modes on I/II/III; mechanical and electrical interlocking |
| Switch function | Changeover switch-disconnector; use correctly coordinated upstream overcurrent protection |
| Series illustration | The shared product photo shows a16A/4P unit only. This page selection is 1250A/4P; the photo nameplate does not define the ordered current,poles or controller. |
Series illustration: the common photograph is16A/4P and does not represent the exact ordered assembly. Choose the controller function independently of the fixed current/poles on this page. L/X/F/Y/enclosure and other derived suffixes require their own confirmed complete reference.
Typical applications
- CHINT NH40SZ transfers the 1250A,4-pole load between two supplies.
Specify your enquiry
For a focused quotation, include:
- Selected complete controller model and quantity
- Normal/standby supply arrangement and actual main/control voltages
- Generator start interface if III is selected;neutral arrangement and installation space
Open retained manufacturer catalogue image
Product reference images and drawings
