The GIC MG21DH is a 3-phase voltage monitoring relay designed for 208-480 VAC grids. It supervises under/over voltage and single phasing with an adjustable ON delay to ignore brief transients at start-up.
🔧 Technical Highlights:
- Supply Voltage: 208–480 VAC
- Functions: Under/Over voltage monitoring with phase loss & sequence detection; adjustable thresholds and delays
- Timing Range: ON/OFF delay selectable up to 15 s (model specific)
- Output Contacts: 1 C/O or 2 C/O
- Contact Rating: 5A @ 250 VAC / 28 VDC (resistive)
- Asymmetry and neutral-loss detection (some models)
- LED indications
✅ Benefits:
- Filters short disturbances on energisation
- Protects pumps and motors from single-phasing
- Compact design for easy retrofit
🚀 Applications:
- Industrial automation and OEM panels
- Fans, pumps and compressors
- Process equipment supplies
MG21DH offers robust 3-phase voltage supervision with an ON-delay to stabilise sensitive loads.
FAQs
- Q: What supply range does the relay monitor?
A: It is specified for 208-480 VAC, 3-phase systems.
- Q: What output contacts are provided?
A: It provides Relay contacts.