Product Specification
| Manufacturer | Square D |
| Product No. | Class 8430 |
| Product Type | Phase Failure Relays |
Dimensions | 11cm x 7 cm x 4.5 cm |
Weight | 0.3 kg |
| Type MPS | 5.5 VA |
| Type MPD | 7 VA |
| Ambient Temperature | +23°F to 122°F-5°C to 50°C |
FAQs of Square D Class 8430
| What protections does the Square D Class 8430 offer for motors? The Class 8430 is a phase failure relay that primarily protects three-phase motors against phase loss (single phasing), phase unbalance (unequal voltages), and phase reversal (incorrect wiring causing reverse motor rotation). Some models also offer undervoltage protection. |
Does the Square D Class 8430 have automatic reset? Based on available documentation, the Square D Class 8430 relays are generally auto-reset. This means that once the fault condition (phase loss, unbalance, or reversal) is corrected, the relay will automatically reset and allow the motor to restart. For safe operation, three-wire control is typically recommended with auto-resetting relays. |
What are the contact ratings for the Square D Class 8430 relays? 8430MPS: Contacts are typically rated for make 1800 VA and break 180 VA at 120 and 240 VAC, with a continuous thermal current of 5 Amps.8430MPD: Contacts are typically rated for make 3400 VA and break 340 VA at 120 VAC, and make 3600 VA and break 360 VA at 240, 480, and 600 VAC, with a continuous thermal current of 5 Amps. |
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Product Photos
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