Model N-703
3 - 7.5 HP
Autoswitch (Dry Run)
DOL Dryrun Auto Switch
Microcontroller based dry-run protection for DOL-started pumps. Automatically restarts the motor on a timer while guarding against voltage unbalance, single phasing and dry running.
Model No.N-703
Capacity3 - 7.5 HP
Manufactured ByNational Electronics
Features
- Microcontroller based technology.
- Motor starts automatically after time delay of 1 / 3 / 5 min.
- Restart timer of 2 hours after a dryrun trip.
- Protection from voltage unbalance, single phasing & dry run (automatic push button setting).
- Operates on low voltage (from 200V).
- Useful for 3 Ph. 1 to 7.5 H.P. (DOL Starter) Openwell, Submersible, Monoblock, pumpsets.
- Separate indications for Timer, OK, SPP & Dry Run.
- Auto Manual facility.
Technical Specifications
| Operating Voltage | 220 to 460 VAC, 50Hz |
| Dry Run Trip Timing | 7 Sec |
| Dry Run Setting | 70% of full load current |
| Trip Time Delay | 4 Sec |
| Voltage Unbalance Setting | 35V Phase to Phase |
| Capacity | 3 - 7.5 HP |
| Model | N-703 |
