Motor Differential Protection Relay | China Manufacturer
I am a China Manufacturer offering the Motor Differential Protection Relay that keeps industrial motors safe and productive. This microprocessor-based relay delivers precise differential protection, fast tripping, and accurate fault detection for motors and driven loads. It covers wide current and voltage ranges, adjustable differential settings, and programmable CT ratios to fit your system. Easy to wire and configure, it supports Modbus RTU/TCP and Ethernet for seamless SCADA integration and remote diagnostics. Built rugged for harsh plant environments, with wide operating temperature, surge protection, and built-in self-checks to minimize maintenance. I serve B2B buyers who demand reliability and local service in China, with dependable performance and a straightforward spare-parts plan from a trusted Manufacturer. Whether you’re specifying new builds or replacing old relays, this Motor Differential Protection Relay offers quick installation, clear fault indication, and reduced nuisance trips to keep your production lines running.
Motor Differential Protection Relay Supplier Your Trusted OEM Partner
Motor differential protection relays are essential for safeguarding drive systems by comparing phase currents and tripping on imbalance within milliseconds. For global buyers, reliable protection minimizes motor damage, reduces downtime, and keeps operations safe across varied climates and installations. Modern units offer wide voltage and current ranges, modular I/O, and robust communications to integrate with PLCs, SCADA, and remote monitoring. As an OEM partner, we tailor protection schemes to match motor loads, enclosure needs, and installation conditions. From customized current thresholds and time delays to wiring diagrams and maintenance documentation, we ensure seamless plant integration. Rigorous in-house testing, traceable quality control, and scalable manufacturing support high-volume demand with consistent performance. Global procurement teams also benefit from reliable supply chains, multi-source capability, and long-term service commitments. Our solutions include technical support, firmware updates, remote diagnostics, and spare-parts programs to minimize downtime. With certifications and proven field performance, differential protection relays help maximize uptime, safety, and return on investment.
| Parameter | Model A | Model B | Model C | Notes |
|---|---|---|---|---|
| Protection Type | Differential Protection (Single-channel) | Differential Protection (Multi-channel) | Differential Protection with Local Fault Isolation | Generic protection scheme across motor sizes |
| Rated Supply Voltage | 24 V DC | 85-264 VAC / 24-48 V DC (dual input) | 110-230 VAC | Power input options vary by model |
| CT Secondary Current | 5 A secondary | 5 A secondary | 5 A secondary | Standard CT input across all models |
| Differential Current Pick-up Idiff | 40 A | 20-150 A (adjustable) | 10-300 A (adjustable) | Settable thresholds to suit motor rating and CT ratios |
| Time to Trip (Differential) | 0.1-0.5 s | 0.05-0.5 s | 0.02-0.3 s | Definite-time/delay modes available |
| Trip Outputs | 2 trip relays + 2 alarm relays | 4 trip relays + 2 alarm relays | 6 trip relays + 2 alarm relays | Flexible signaling for cascades and isolation |
| Alarm Outputs | 2 | 2 | 2 | Local and remote fault indication |
| Communication Interfaces | Modbus RTU (RS-485) | Modbus TCP, IEC 61850-9-2 | Modbus TCP, IEC 61850-9-2, DNP3 | Industrial automation compatibility |
| Sampling / Scan Rate | 12 kS/s | 16 kS/s | 20 kS/s | Higher rates for accurate differential detection |
| Operating Temperature | -25 to 70 C | -20 to 70 C | -40 to 85 C | Industrial-grade ranges |
| IP Rating | IP20 | IP40 | IP54 | Protection against dust and moisture increasing with model |
| Insulation Voltage | 600 V | 1000 V | 600 V | IEC insulation standards compliance |
| Standards / Compliance | IEC 61850-9-2; IEC 61850-3 | IEC 61850; IEC 60870-5-104 | IEC 61850-9-2; IEC 60870-5-104; IEEE C37.90 | Region-specific certifications may apply |
| Dimensions (HxWxD) | 约 22 x 90 x 125 mm | 约 44 x 120 x 170 mm | 约 60 x 180 x 230 mm | Compact to industrial-sized form factors |
| Mounting | DIN rail | DIN rail | Panel mount | Installation flexibility |
Related Products
Motor Differential Protection Relay Delivers Unmatched Quality From Concept to Delivery
Top Selling Products
- Related Blog
- Reviews
