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Vol. 56 | The Heavyweight DC Drivetrain Duel Reliability isn’t optional when you’re designing actuators that need to move actual steel or
Read Article β| Bulk Pricing | ||
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| QTY | Unit Price(Inlc. GST) | |
| 10+ | βΉ2,282.42 βΉ 1934.25 + 348.17 GST | |
| 25+ | βΉ2,235.84 βΉ 1894.78 + 341.06 GST | |
| 50+ | βΉ2,189.26 βΉ 1855.31 + 333.96 GST | |
| 100+ | βΉ2,142.68 βΉ 1815.83 + 326.85 GST | |
Advanced industrial-grade monitoring relay for 3-phase and 1-phase systems. Protects equipment from Phase Loss, Phase Sequence errors, and Neutral Loss with 2 C/O output.
Are you worried about a sudden neutral loss or phase reversal burning out your expensive 3-phase motors? The GIC MG73BH SM500 is a professional-grade monitoring relay designed for both 3-phase and 1-phase 4-wire systems. It acts as an automated sentry, constantly checking for Phase Loss, Phase Sequence errors, and the dreaded Neutral Loss. By instantly tripping your control circuit during a fault, it ensures that your pumps, compressors, and industrial panels remain isolated from damaging electrical conditions.
The Probots Quality Commitment
When it comes to high-voltage protection, reliability is the only metric that matters. This unit is Probots™ Lab Verified , having undergone rigorous testing in our Bangalore facility to ensure the trip timing and voltage thresholds match the manufacturer’s datasheet exactly. Because these are precision instruments, we utilize Probots™ Secure-Transit packaging to ensure the internal mechanical relays are protected from high-G shocks during shipping. Furthermore, our Probots™ Tech-Bridge ensures you have access to local engineering support if you encounter complex integration challenges in your control cabinet.
Unlock New Capabilities (Project Evolution)
If you have previously relied on simple thermal overloads or basic fuses, the SM500 represents a significant upgrade to your system's intelligence. While fuses only protect against overcurrent, this relay prevents the "silent" failures—like a loose neutral wire—that can cause massive voltage imbalances and destroy sensitive electronics. It is rated as an Intermediate installation task, requiring a standard 35mm DIN rail and basic control wiring knowledge. Upgrading to this relay allows you to build more resilient automation systems that can self-diagnose power health before allowing a motor to start.
Virtual Technician & Wiring Guide
SAFETY WARNING: This device operates at lethal 240V/415V AC levels. Ensure the main isolator is locked out before installation. For a standard 3-phase 4-wire setup, connect your phases to L1, L2, and L3, and crucially, connect the system neutral to the 'N' terminal. The 2 C/O output contacts (Terminals 15-18 and 25-28) should be wired in series with your contactor's coil circuit. If the relay detects a phase sequence error (wrong rotation), the Red LED will light up, and the output will remain open, preventing the motor from running in reverse.
Specifications:
Key Applications:
Project Evolution
Virtual Technician & Wiring
SAFETY WARNING: This device handles lethal AC voltages. Always disconnect power before installation.
Package Includes:
1 X GIC MG73BH SM500 Voltage Monitoring Relay - 3 Phase / 1 Phase 4-Wire, 240VAC, Neutral Loss & Phase Sequence Protection
Frequently Asked Questions (FAQ)


| Technical Details | Specifications :
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7-Day WarrantyThis item is covered by a warranty of 7 days from the date of delivery, against confirmed manufacturing defects only, as verified by Probots' own testing and investigation. In case of a confirmed defect, we will replace the item β a refund is issued only if a replacement can't be supplied (e.g. discontinued or out of stock). Transit damage or a wrong item received must be reported within 3 days of delivery. What voids the warranty:If the product shows signs of misuse, tampering, physical damage, static discharge, liquid or fire damage, use of unapproved chemicals, or has been soldered or physically altered in any way. Country of OriginChina Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates. We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc. Note: Business Orders are processed manually and usually take 1-3 days to process compared to placing the order directly on our website. Please plan your purchases accordingly. Need Help?
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