Motor Operation Monitor for Hoist of Reservoir Sluice
WB9128-1 adopts special made isolation module, MCU controller and high speed data synchronizing sampling and processing technologies to isolate and convert active power of three-phase four-wired electric system or 3 phase 3 wire system into RS485 bus and load independent output DC average current signal 4-20mA or 0-20mA and dc voltage signal 0-5V or 1-5V.
Application background
The traditional hoist monitoring use-case is to use load pressure sensors to directly measure the pull/pressure to achieve overload protection of the motor. This method is not only difficult to install and maintain, but more important is the core component used by this type of sensor-pressure sensitive components are extremely susceptible to environmental interference, such as drift caused by outdoor temperature, damage caused by vibration, and aging of the adhesive layer caused by long use time. In addition, because the range of force measured by the application equipment is relatively wide, the accuracy of the direct force measurement type is low, and it is difficult to meet the application requirements on the spot.
Solution
The motor load measurement and control instrument is connected to the distribution box of the three-phase motor, and the weight of the actual load is converted according to the output active power of the three-phase motor. The product uses electromagnetic isolation to sample the voltage and current on the distribution line. The output uses a liquid crystal screen to display the current electrical parameters and the gravity load converted by mathematical equations, and the gravity load is measured by the electrical parameters. The motor load measurement and control instrument is installed in the distribution box. It is small in size, light in weight, and is little affected by the external temperature. No additional wiring is required on site, and the stability and reliability are greatly improved. The product has a wide range of application fields, including the lifting of the typical water gate in the water conservancy industry, and the lifting and falling of the heavy equipment industry. This product is suitable for motor operation monitoring system and so on.

Input: Phase Voltage AC 57.7V ~ 289V; Line Voltage AC 100V ~500V; Current AC 1A~ 50A;
Input Configuration System: 3- phase 3- wire; 3- phase 4- wire;
Linear Measurement Range: Voltage 20% - 100% of rated input voltage; Current 1% - 100% of rated input current;
Input Frequency: 50Hz;
Output Ripple: 10mV;
Output Types: One channel RS485; Dual Channel analog;
Analogue Output Specifications: DC Voltage output:2.5V±2.5V; 0-5V; 1..5V;3V±2V; DC Current:10mA ± 10mA; 0-20mA; 4-20mA; 12mA±8mA;
Output Parameters: E,R,PQ,C,S,Ua,Ub,Uc,Uab,Ubc,Uac,Ia,Ib,Ic,Pa,Pb,Pc,Qa,Qb,Qc,Ca,Cb,CC,Sa,Sb,Sc
Accuracy Grade: Current, voltage 0.2% reactive/active power /power factor 0.5%
Response Time: 200ms;
Auxiliary Power Supply: DC 12V; DC 24V;
Static Current: 65mA;
Operating Temperature: 0-50 ℃;
Communication Protocol: Modbus – RTU;
Voltage Insulation: DC 2500V; 1 minute;
Mounting: DIN rail 35mm mount.
Dispatch
In-stock orders are dispatched within 2 business days.
Shipping options
We deliver across Australia and internationally by any of the following methods:
- Australia Post Express
- Australia Post Parcel Post
- DHL
- FedEx (only international)
- Freight account. We'll email packaging dimensions when the shipment is ready to be book.
*Transit times vary depending on the shipping method and destination.
Store Pickup - Carrum Downs, Victoria, 3201
Order before 11am to collect after 2pm the same day. Mon–Fri, 9am–5pm, excludes public holidays.
RETURNS
How to return an item Contact us before sending anything back. Email info@oceancontrols.com.au or call +61 3 9708 2390. We'll confirm eligibility and guide you to the return process.
Return window 14 days from dispatch date.
Condition required Items must be unused and in original packaging, including all documentation and manuals.
Restocking fee A 20% restocking fee applies to all accepted returns. Return shipping costs are the customer's responsibility.
Non-returnable items
- Custom-made or specially imported products
- Software licences (some software have trial versions available)
- Items not in original, as-new condition
WARRANTY
How to make a warranty claim Before returning anything, please contact us. Our engineers can often resolve the issue remotely. If a return is required, our team will provide you with a warranty form to include with the goods.
What's covered Defects in materials and workmanship under normal use and correct installation.
What's not covered The warranty does not cover damage or failures caused by factors outside our control, including incorrect installation, unauthorised alterations or modifications, or any installation or use not recommended by the manufacturer.
Standard warranty All products carry a 12-month warranty from the date of purchase unless stated otherwise.
Extended warranty
- Labjack: 5 Years
- Atop: 5 Years
- MeanWell: 3 Years
- Teracom: 3 Years
- Novus: 3 Years







