The GYCM8EY3 series is an intelligent electronic molded case circuit breaker for 3-phase AC400V distribution systems. It combines electronic overcurrent protection, voltage protection, measurement, LCD display, event logging, and RS-485 communication.
Main Functions
- 3P intelligent MCCB for AC400V distribution systems.
- Electronic overcurrent striker.
- Protection functions include overload, short-circuit, overvoltage, undervoltage, phase loss, over/under-frequency, and voltage/current imbalance.
- Passive anti-islanding protection for PV integration.
- Measurement of three-phase current, voltage, frequency, and imbalance.
- LCD display, LED indication, and button interface.
- RS-485 communication with Modbus-RTU; DL/T 645-2007 is optional.
- Event logging for trip faults, alarms, and daily max/min records.
Technical Parameters
| Model | Shell frame rating current | Ics | Icu | Icw |
|---|
| GYCM8EY3-250 | 50A-125A / 100A-250A | 35kA / 65kA or 50kA / 70kA | 50kA / 65kA or 50kA / 70kA | 10kA/1s |
| GYCM8EY3-400 | 160A-400A | 50kA / 70kA | 50kA / 70kA | 10kA/1s |
| GYCM8EY3-630 | 250A-630A or 630A frame | 50kA / 65kA | 50kA / 85kA | 20kA/1s |
| GYCM8EY3-800 | 320A-800A | 50kA / 65kA | 50kA / 85kA | 20kA/1s |
Common Technical Data
| Item | Specification |
|---|
| Poles | 3P |
| Rated operating voltage | AC400V |
| Rated insulation voltage | 1000V |
| Rated impulse withstand voltage | 8kV |
| Overcurrent striker type | Electronic |
| Working environment | -5°C to +40°C, altitude up to 2000m |
