Home > Products > Motor control and management system > Motor Overload Relay 3 Phase Sequence Loss Voltage Current Pump Blower Protector Protection Relay
Motor Overload Relay 3 Phase Sequence Loss Voltage Current Pump Blower Protector Protection Relay
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Product Description
Elecnova WDH-31-500 is a new generation for the thermal relay, time replay,transducer and so on. It simplized the motor protection mode, brings a wider protection range and enhance the protection accuracy, turns the instrument more reliable.
Product Name | Motor Overload Relay 3 Phase Sequence Loss Voltage Current Pump Blower Protector Protection Relay | ||
System | Rated voltage of motor | AC 380V or AC 660V,50Hz | |
Rated current of motor | 0.1A~800A | ||
Insulation resistor | ≥100MΩ | ||
Working range | AC 100~415V | ||
Power consumption | ≤3VA | ||
Operating temperature | -20℃~+60℃ | ||
Relative humidity | ≤93%RH | ||
Storage temperature | -25℃~70℃ | ||
IP degree | Front:IP64,Rear:IP20 | ||
Protection Accuracy | Current/voltage | ±1% of setting value | |
Thermal capacity | ±1% of setting value | ||
Delayed acting time | When delayed acting value <2s:±100ms When delayed acting value ≥ 2s:±5% | ||
Control Relay | Contact capacity | AC 250V/5A | |
Signal Relay | Contact capacity | AC 250V/5A | |
Analog Output | Mode | DC 4~20mA,RL≤350Ω | |
Insulation | ≥2kVAC | ||

Product Components
--Basic module
--Display module
--Residual CT(optional)
--External CT(optional):SHI-ZT40,
5P10:500A/5A,800A/rresponding conteoller rated current of 5A

Communication Protocol | Control Mode | Current Code | Main Voltage | Optional Code | Digital Code |
1:Profibus-DP | A:Direct start | 1A 100A | AC 380V | L:Residual current | K1:Dry contact input |
2:Modbus-RTU | B:Bi-direction strat | 2A 250A | AC 660V | M1:Analog input | K2:Wet contact input |
3:2 Modbus-RTU | C:Double speed start | 6.3A 500A | AC 100V | T:Temperature | |
4:2 Profibus-DP | D:Resistor divider starting | 25A 800A | V:Low voltage restart | ||
E:Y/start | |||||
H:Autotransformer start | |||||
K:Protection mode | |||||
R:Start with soft-start | |||||
P :Start with inverter |
Current | Motor's Rated Current | SHI-I CT Code |
1A | 0.2A~1A | SHI01-II,Φ18mm |
2A | 1A~2A | SHI02-II,Φ18mm |
6.3A | 2A~6.3A | SHI06-II,Φ18mm |
25A | 6.3A~25A | SHI25-II,Φ18mm |
100A | 25A~100A | SHI100-II,Φ18mm |
250A | 100A~250A | SHI250-II |
500A | 250A~500A | SHI05-II,Φ18mm +3 SHI-ZT40(500A:5A) |
800A | 500A~800A | SHI05-II,Φ18mm +3 SHI-ZT40(500A:5A) |


EXTERNAL CT | RESIDUAL CURRENT CT | |||
Model | SHI-ZT40 | SHI-ZT30 | SHI-ZT100 | |
Diameter(mm) | 42 X 30 | 31 | 100 | |
Dimension(mm) | 75 X 44 X 102 | 75 X 44 X 98 | 185 X 44 X 190 | |

Elecnova WDH-31-500 is a new generation controllor to replace the thermal relay, time relay, transducer etc. It simplized the way of motor protection, provides wider range , higher accuracy and reliable industrial control to our customers. It's makes the user more easy to eliminate the error and decrease lost as well.
Application Occasion
*Low Voltage three phase AC motor
*MCC cabinet or motor independent control cabinet
*Reversing and Reduced Voltage
*Advanced automation or control(such as conveyor system or well recovery pumps)
*Fire pumps and fans


SMT

AOI Test

Plug-In Mounting

Wave Soldering

Assembling

Inspection
Packing Details: Each on in inner box with air bag, 24pcs in a carton box
Delivery time: 7~10days after sales confirmation
Transportation: By Air(DHL,TNT, Fedex etc)

1. Cardboard Tray

2. Inner box with air bag

3. Mast carton box
Q: Are you trading company or manufacturer ?
A: We are factory in Jiangyin, Jiangsu Province.
Q: How long is your delivery time?
A: 7~10days for regular order, OEM/ODM projects should be negotiated by the both parties.
Q: Do you provide samples ? is it free or extra ?
A: Sample is available but it is not free.
Q: What is your terms of payment ?
A: Order amount ≤$3000, 100% before delivery, order amount ≥$3000, 30% as deposit, 70% before delivery.

Contact Us
- Jiangsu Sfere Electric Co., Ltd.
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