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Schneider EOCRPFZ-H1DZ7W is a high-performance flush-mounted intelligent motor protector integrating multiple protection functions. It features wide current range and universal voltage supply, compatible with various industrial motors. Equipped with millisecond-level response, fault recording function and 4-20mA analog output, it serves as an ideal solution for motor protection in industrial automation systems. Proper parameter configuration effectively extends motor service life, reduces equipment failure rate and boosts production efficiency.
- Model Code Definition
| Segment | Code | Description |
| Product Series | EOCRPFZ | Electronic Over Current Relay, Panel Flush Mount Type |
| Mounting Type | H | Combined type, matched with 3 current transformers |
| Current Rating | 1 | Direct measurement: 0.5~60A |
| 5-turn mode: 0.1~2.0A | ||
| External CT: 1~3600A | ||
| Function Configuration | D | Basic protection + 1-channel 4-20mA analog output |
| Voltage Rating | Z7 | Wide voltage supply: 85~250VAC/DC, 50/60Hz |
| Additional Function | W | Standard version with fault record, LED display and reset function |
- Core Technical Parameters
| Category | Specification | Remark |
| Protection Functions | Overcurrent, undercurrent, phase loss, locked rotor, reverse rotation, current unbalance, stall, grounding, leakage, short circuit, pre-alarm | Selectable definite time, inverse time and overheating inverse time characteristics |
| Current Range | Direct: 0.5~60A | Wide coverage for diverse motors |
| 5-turn: 0.1~2.0A | ||
| External CT: 1~3600A | ||
| Power Supply | 85~250VAC/DC, 50/60Hz | Strong tolerance to voltage fluctuation |
| Output Signal | 1-channel 4-20mA current loop | For PLC and upper computer monitoring |
| Contact Rating | 1-SPST, AC250V/3A resistive load | Standard control contact |
| Display Mode | LCD screen, automatic 5-second cyclic display of three-phase current and leakage current | Manual display switching available |
| Fault Record | Records latest 3 fault causes and current values, data retained after power off | Convenient fault analysis |
| Response Time | 20ms | Fast motor protection |
| Installation | 35mm DIN rail or panel flush mounting | Cutout: 44-55-66mm, Outline: 55-66-77mm |
| Working Ambient | Temperature: -35~85℃, Humidity: ≤95% non-condensing | Suitable for harsh industrial conditions |
| Insulation Performance | Insulation resistance: ≥10MΩ@DC500V | Safe and reliable |
| Withstand voltage: 2kV/50Hz for 1min between circuit and shell | ||
| Order Number | EOCRPFZ-H1DZ7W | Official Schneider part number |
- Full Model List (EOCR-PFZ Series)
| Model | Current Rating | Function | Power Supply | Extra Feature |
| EOCRPFZ-H1DZ7W | 0.5~60A | Basic + 1×4-20mA | 85~250VAC/DC | Standard |
| EOCRPFZ-H2DZ7W | 0.5~60A | Basic + 2×4-20mA | 85~250VAC/DC | Standard |
| EOCRPFZ-WRDZ7W | 0.5~60A | Basic + 1×4-20mA | 85~250VAC/DC | Standard |
| EOCRPFZ-WRDUH | 0.5~60A | Basic + Communication | 85~250VAC/DC | Standard |
| EOCRPFZ-C-WRDBWQ | 0.5~60A | Basic + 1×4-20mA | 24VAC/DC | Wide range |
| EOCRPFZ-C-WRDBT | 0.5~60A | Basic + 1×4-20mA | 24VAC/DC | Wide range |
| EOCRPFZ-H3DBW | 0.5~60A | Basic + 3-channel output | 85~250VAC/DC | Standard |
| EOCRPFZ-WRDZ7WQ | 0.5~60A | Basic + 1×4-20mA | 85~250VAC/DC | Enhanced |
- Cross-brand Replacement Comparison
| Schneider EOCRPFZ-H1DZ7W | ABB | Siemens | Omron | Feature Comparison |
| Intelligent motor protector | M101-P | 3RW55 | K8DS | Schneider: 3 fault records, 20ms fast response |
| 0.5~60A | 0.1~63A | 0.1~63A | 0.1~63A | ABB: Superior communication performance |
| 1×4-20mA | 1×4-20mA | 1×4-20mA | 1×4-20mA | Siemens: High PLC compatibility |
| Wide voltage | 24~240VAC/DC | 24~240VAC/DC | 24~240VAC/DC | Omron: Cost-effective |
- Common Faults & Troubleshooting
| Fault Phenomenon | Code | Root Cause | Solution |
| Protector fails to start | – | Power cut-off, abnormal voltage | 1. Check wiring |
| 2. Measure supply voltage | |||
| 3. Verify DC polarity | |||
| False tripping | OC/E1 Overcurrent | Improper CT selection, wrong mounting, load fluctuation | 1. Match CT ratio with motor |
| 2. Keep CT away from inverter | |||
| 3. Adjust protection delay | |||
| Phase loss trip | PH/E2 | Missing phase, loose wiring, CT failure | 1. Check three-phase voltage |
| 2. Fasten terminals | |||
| 3. Test CT output | |||
| Leakage trip | LE/E3 | Poor line insulation, motor winding grounding | 1. Test motor insulation resistance |
| 2. Inspect cable condition | |||
| 3. Reset leakage threshold | |||
| Communication failure | – | Wrong wiring, mismatched baud rate | 1. Check RS485 A/B connection |
| 2. Set 9600bps, 8N1 | |||
| 3. Confirm 120惟 terminal resistor |
- Air Transport Compliance & Certifications
6.1 Certifications
CE: Compliant with EU LVD and EMC directives
UL: Meets US safety standards
CSA: Conforms to Canadian safety specifications
RoHS: Lead-free eco-friendly design
6.2 Air Shipment Rules
Battery status: No built-in lithium battery or supercapacitor, classified as non-dangerous goods
Packaging: Standard industrial package against vibration damage
Documents: CE certificate, manual and packing list required
Notice: Avoid contact with sharp objects to prevent shell and insulation damage
- Application Cases
Case 1: Fan Motor Protection in Steel Plant
Application: 380V 55kW frequent-start fan motor with locked rotor risk
Matching: EOCRPFZ-H1DZ7W + 200:5 three-phase CT
Setting: 1.2 times rated current overcurrent protection (inverse time); 3 times rated current locked rotor protection (0.5s delay); 3s delay phase loss protection
Outcome: 3 bearing seizure motor burnout accidents avoided, maintenance cost cut by 40%
Case 2: Chemical Pump Monitoring System
Application: 45kW explosion-proof chemical pump with remote current monitoring demand
Matching: EOCRPFZ-H1DZ7W + Modbus RTU module
Setting: 4-20mA output corresponding to 0~200A for PLC acquisition; enabled fault record; 300mA leakage protection threshold
Outcome: Real-time pump monitoring, early abnormal warning, production safety improved by 50%
- Selection Guidelines
Quick Rules
- Mounting: H=CT combined type, WR=direct measuring type
- Current: 1=0.5~60A, 2=0.5~100A
- Function: D=1-channel 4-20mA, H=2-channel, U=communication
- Voltage: Z7=85~250VAC/DC, C=24VAC/DC
- Version: W=Standard, Q=Enhanced
Applicable Scenarios of EOCRPFZ-H1DZ7W
General Applications
- Overload, phase loss, locked rotor and leakage protection for 380V three-phase industrial asynchronous motors
- Control circuits requiring 4-20mA remote signal transmission to PLC and host computer
- Panel flush mounting and DIN rail installation inside control cabinets
- Sites with severe voltage fluctuation, 85~250V AC/DC power supply
Industry Applications
Water Treatment: Water pump, sewage pump, dosing pump, aeration fan
HVAC: Centrifugal fan, axial fan, exhaust fan, cooling tower fan
Machinery Manufacturing: Conveyor, mixer, crusher, air compressor
Petrochemical: Process pump, stirring equipment, explosion-proof matched motor
Building & Metallurgy: Kiln fan, dust removal unit, conveying equipment
Building Power Distribution: Fire fan, water supply & drainage pump, central air conditioning motor
Power Adaptation Range
Direct measurement: 0.5~60A, fits 0.25~30kW motors
Extended by external CT: Max 3600A, applicable to high-power motors
Non-recommended Scenarios
- Motors driven by high-frequency inverter without power frequency operation
- Precision servo and stepper motor dedicated protection circuits
- Extreme environment below -35℃ or above 85℃
- Sealed space with heavy corrosion and dense dust without protective measures
