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W191

The series is especially suitable for small pump systems where compact dimensions, simple setup and automatic pressure control are important.

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Product Overview

W191 is a compact intelligent controller for water pump applications. It is designed for 220V input systems and supports pressure-based pump operation, multi-pump linkage and multiple operating modes.

The series is especially suitable for small pump systems where compact dimensions, simple setup and automatic pressure control are important.

Key Selling Points

  • Compact 2.2kW pump controller with 10A rated output current.
  • Supports three-phase motor output terminals U/V/W and single-phase motor output via V/W.
  • Supports up to two auxiliary pumps, allowing up to three pumps in linkage operation.
  • Operating modes include upstream pressure boosting, downstream pressure boosting, water tower supplement, manual mode and air blower mode.
  • The keypad supports pressure setting, parameter setting, monitoring display switching and fault reset.
  • Fault alarms include low pressure, high pressure, low water level and pressure transducer fault.

Core Parameters

Item Details
Model W191-2003
Input AC 1PH 220V
Output AC 3PH 0-220V
Rated output current 10.0A
Motor power 2.2kW
External dimensions 154 x 180 x 92mm
Motor output terminals U/V/W for three-phase motor; V/W for single-phase motor
Pump linkage Up to three pumps, including two auxiliary pumps
Feedback Pressure transducer, with voltage or current feedback selection

Model Coverage

Model / Voltage Class Power Range Notes
W191-2003 2.2kW Compact 220V water pump controller

Interface and Control

  • L and N are single-phase AC input terminals.
  • U, V and W are motor output terminals for three-phase motor wiring.
  • V and W can be used for single-phase motor output wiring.
  • PE grounding terminal is provided.
  • Control wiring should use shielded or twisted-pair cable and should be kept away from strong-current wiring.

Application Scenarios

  • Small water pressure boosting systems.
  • Water tower supplement systems.
  • Small pump control systems requiring automatic pressure control.
  • Applications where compact installation space is required.

Installation and Use Notes

  • Set motor phase, rated power, frequency, speed, voltage and current according to the motor nameplate.
  • Set the pressure transducer measuring range according to the transducer label.
  • If actual pressure display is inaccurate, adjust the pressure correction parameter.
  • Before use, confirm that pump rotation direction is correct.

FAQs

What is the difference between an AC Inverter and a DC Inverter?

AC Inverters and DC Inverters are two types of devices used to convert electrical energy. The main differences between them are as follows:

  1. Input Current Type:
    • AC Inverter: Accepts AC power as input (e.g., standard household or industrial power) and converts it into a controlled AC power output. Commonly used in motor control, HVAC systems, and temperature control systems.
    • DC Inverter: Accepts DC power as input (e.g., from solar panels or batteries) and converts it into a controllable AC power output. Typically used in solar power systems, electric vehicle drives, and uninterruptible power supply (UPS) systems.
  2. Application Areas:
    • AC Inverter: Suitable for applications requiring AC power control, such as motor control, power systems, refrigeration, and HVAC systems.
    • DC Inverter: Ideal for converting DC power sources into usable AC power, such as in solar power generation systems, electric vehicle drives, and UPS systems.

In summary, AC inverters control and regulate AC power, while DC inverters convert DC power into AC power for various devices.

When installing an inverter, ensure the following:

  • Place the inverter in a location that is well-ventilated, cool, dry, and waterproof.
  • Avoid areas with high humidity, direct sunlight, or excessive dust.
  • Ensure proper grounding to prevent electrical hazards.
  • Follow the installation instructions provided in the user manual for optimal performance and safety.

No, our inverters come with pre-set parameters that meet standard usage requirements. If you need to adjust the parameters, you can do so in standby mode. For custom products, we can pre-set parameters according to your specific needs before shipment.

For standard products:

  • Parameters must be adjusted manually in standby mode.
    For custom products:
  • Parameters can be pre-set before delivery based on your requirements.

Our factory has a monthly production capacity of 50,000 units. This ensures timely delivery for both small and large orders. We are committed to meeting customer demands efficiently and maintaining high-quality standards.

  • Office Area: Our office spans 1,800 square meters.
  • Factory Area: Our factory covers 7,000 square meters.

Our facilities are designed to support efficient production, quality control, and customer service. We are located in Guangzhou, China, with convenient access to major transportation hubs.

We have been specializing in export since 2004, accumulating over 20 years of experience in international trade. Our products are well-received in global markets, including Europe, Africa, the Middle East, Southeast Asia, and South America.

Our company has a team of 150 employees, including skilled engineers, experienced technicians, and dedicated customer service personnel. We are committed to providing high-quality products and exceptional service to our customers worldwide.

Our delivery times depend on the order type:

  • Sample Orders: 3-5 days.
  • Bulk Orders: 15-25 days.
  • OEM Orders: 30-35 days.

We ensure timely delivery by optimizing our production and logistics processes. For urgent orders, please contact us for expedited shipping options.

Our payment terms vary depending on the order type:

  • Sample Orders: 100% T/T in advance.
  • Customized Products: 50% T/T in advance, and the remaining 50% T/T before delivery.
  • Standard Products: 30% T/T in advance, and the remaining 70% T/T before shipment.

We ensure secure and transparent transactions to build trust with our customers. For more details, please contact our sales team.

Our main markets include Europe, Africa, the Middle East, Southeast Asia, and South America, covering over 70 countries and regions. Our brand, BEDFORD, is well-known for its high-quality inverters and reliable service. We are committed to expanding our global presence and meeting diverse customer needs.

  • Factory Location: Our factory is located in Foshan, China, approximately 30 kilometers from our office in Guangzhou. It takes about one hour by car to reach our factory from the office.
  • Office Location: Our office is located in Guangzhou, China, within one hour’s drive from Guangzhou Baiyun Airport or the Canton Fair Complex.

We welcome customers to visit our facilities for a firsthand experience of our production capabilities and quality control processes.

At BEDFORD, we have a long history and strong reputation in the industry:

  • Experience: Our founder has been specializing in inverters since 1993, and our company was established in 2007.
  • Certifications: We are a certified Chinese high-tech enterprise, with ISO and CE certifications.
  • Intellectual Property: We hold over 60 patents and registered trademarks, ensuring innovation and quality.
  • Values: Our core value is to create value for our customers through reliable products and exceptional service.

We invite you to review our credentials and visit our facilities to build trust and confidence in our partnership.

Yes, we support OEM (Original Equipment Manufacturer) services. For certain products, we require a Minimum Order Quantity (MOQ) of 300 units.

Our OEM services include custom branding, logo printing, and tailored specifications to meet your unique requirements. Please contact us for more details and a customized quote.

We conduct comprehensive testing on each machine before shipment to ensure product quality. Our testing includes:

  • Voltage and Current Testing: Verifying electrical parameters meet specifications.
  • Interference Testing: Ensuring minimal electromagnetic interference.
  • Load Testing: Simulating real-world operating conditions.
  • Aging Testing: Testing long-term durability and reliability.

Our state-of-the-art testing equipment and laboratory facilities guarantee the highest quality standards for all our products.

Constant pressure water supply can be achieved through the following methods:

  1. Pressure Sensor Feedback: The pressure sensor monitors pipeline pressure and compares it to the set pressure. The inverter adjusts the motor speed via built-in PID control to maintain consistent pressure.
  2. Automatic Adjustment: The inverter continuously adjusts the motor speed to ensure the actual pressure matches the set pressure, achieving stable water supply.

This technology ensures efficient and reliable water supply for various applications, including residential, commercial, and industrial settings.

Yes, our PV inverters support automatic switching between AC and DC power. For more efficient MPPT (Maximum Power Point Tracking) switching, you can set a threshold DC input value. When the DC power drops below this value, the inverter will automatically stop and switch to AC power input.

This feature ensures seamless operation and maximizes energy efficiency, especially in hybrid power systems combining solar and grid power.

Yes, our PID controller is compatible with inverters from other brands. The PID controller is designed to provide precise control of motor speed and pressure, making it a versatile solution for various applications.

If you are using an inverter from another brand, please ensure compatibility by consulting the technical specifications and contacting our support team for guidance.

To use the floater for your setup (e.g., 1 well pump, 1 inverter, and 2 floaters for a well and reservoir), follow these steps:

  1. Connect the Floaters: Use the floaters as substitutes for electrodes to detect water levels.
  2. Wiring Instructions: Refer to the wiring diagram in the manual or contact our technical support team for assistance. We can also provide a video tutorial upon request.

This setup ensures automatic control of water levels and prevents overfilling or dry running of the pump.

The VDC input range (420-720V) is standardized for inverters with an output voltage of 380V. The current varies based on the power requirements of the connected load.

For example:

  • A 2.2kW pump with 10 solar panels (60VDC each) results in a maximum VDC of 600V.
  • A 5.5kW pump with 20 solar panels (60VDC each) results in a maximum VDC of 1200V, which exceeds the inverter’s input range.

To ensure compatibility, select an inverter with a VDC range that matches your solar panel configuration and load requirements.

The current behavior in series and parallel circuits is as follows:

  1. Series Circuit: The current remains the same across all components (I1 = I2).
  2. Parallel Circuit: The total current is the sum of the currents in each branch (I1 + I2 = Imax).

For example:

  • If you have 1 group of 10 solar panels (10A each), the total current is 10A.
  • If you add another group of 10 panels, the total current becomes 20A (10A + 10A).

For inverters, the input current is independent of the output current. For instance, if your input current is 20A and the output current is 14A, this is acceptable as long as the pump’s input current does not exceed 14A.

The combiner box serves two primary functions in solar power systems:

  1. Lightning Protection: Protects the system from lightning strikes by providing a safe path for high-voltage surges.
  2. Reverse Connection Proof: Prevents incorrect wiring of solar panels, ensuring safe and reliable operation.

If you are connecting multiple solar panels in parallel (two or more), we strongly recommend using a combiner box to enhance system safety and efficiency.

Yes, for safety reasons, we recommend installing an additional combiner box and AC/DC switching box when using a generator. This setup ensures proper isolation and protection of the system, preventing electrical faults and damage to equipment.

For example, if your system includes both solar panels and a generator, the combiner box will manage the solar input, while the AC/DC switching box will handle the generator input. This configuration provides a seamless transition between power sources.

The rated output current of the inverter is fixed and cannot be adjusted. However, the inverter includes a parameter that allows you to modify the motor current for protection purposes.

For example:

  • If your water pump motor is rated at 3.7kW (17A) and the inverter is rated at 5.5kW (20A), you can adjust the motor current to 17A by tuning the F0-10 parameter to match the pump motor’s specifications.

This ensures optimal performance and prevents overloading of the inverter.

No, for single-phase 220V applications, the maximum power is typically limited to 2.2kW. A 5.5kW pump requires a three-phase inverter or a higher-capacity single-phase inverter, which is not suitable for 220V operation.

We recommend selecting an inverter that matches the power requirements of your pump to ensure safe and efficient operation.

The main differences between B603PRO and W713 are as follows:

  1. Application:
    • B603PRO: Designed for deep well pumps, submersible pumps, and applications requiring high current.
    • W713: Suitable for light-load motors such as general pumps and centrifugal pumps.
  2. Power Matching:
    • For deep well pumps, B603PRO can handle the same power rating as the motor (e.g., a 5.5kW motor requires a 5.5kW B603PRO inverter).
    • For W713, you need to select a higher power rating (e.g., a 7.5kW W713 inverter for a 5.5kW deep well pump).

In summary, B603PRO is ideal for heavy-duty applications, while W713 is better suited for lighter loads.

Our inverters deliver exceptional performance and value through several key advantages:

  1. Superior Performance: Our inverters use advanced PID control for precise motor speed adjustment and constant pressure water supply, ensuring smooth and efficient operation.
  2. Reliability: Built with high-quality components, they are designed to withstand challenging environments, offering a longer lifespan and reduced maintenance needs.
  3. Versatility: Compatible with various applications, including deep well pumps, booster systems, and renewable energy solutions.

For cost-effective options, we offer the W191 and W505 series, which provide reliable performance at an affordable price. Whether you need high-performance or budget-friendly solutions, our inverters are tailored to meet your needs.

If you’re looking for reliability, efficiency, and versatility, our products are designed to exceed expectations.

Yes, you can create a booster pump system using two pumps and two W191 inverters, each equipped with its own pressure sensor. Here’s how it works:

  1. Current Functionality:
    • Our W191 inverters are currently being developed with a water pump linkage feature to simplify this setup.
  2. Alternative Solution:
    • You can adjust the pressure sleep deviation and start deviation functions to configure one pump as the master and the other as the slave.
    • Note: This configuration does not support automatic rotation based on time.

This setup ensures efficient and reliable operation of the booster pump system.

Yes, our inverters use high-frequency SPWM (Sine Pulse Width Modulation) technology. This advanced modulation technique ensures smooth and efficient power conversion, minimizing harmonic distortion and improving overall system performance.

SPWM technology is particularly beneficial for applications requiring stable and clean AC power output, such as motor control and renewable energy systems.

Yes, you can create a booster pump system using two pumps and two W191 inverters, each equipped with its own pressure sensor. Here’s how:

  1. Current Functionality:
    • We are currently developing a water pump linkage feature for the W191 series to simplify this setup.
  2. Alternative Solution:
    • You can adjust the pressure sleep deviation and start deviation functions to configure one pump as the master and the other as the slave.
    • Note: This configuration does not support automatic rotation based on time.

This setup ensures efficient and reliable operation of the booster pump system, making it ideal for applications requiring increased water pressure.

The W713B requires a 3V coin cell battery. This battery powers the backup memory of the inverter, ensuring that settings are retained even when the main power is disconnected.

Please ensure you use a high-quality 3V coin cell battery to avoid any potential issues with memory retention.

We recommend using our solar pump inverter for this application. The inverter can utilize solar power during the day and switch back to grid power at night. Here’s how it works:

  1. Daytime Operation:
    • The inverter will prioritize solar power for running the pump during daylight hours.
  2. Nighttime Operation:
    • When solar power is unavailable, the inverter can be manually switched back to grid power to ensure continuous operation.

This hybrid solution reduces energy costs and promotes sustainability without compromising on reliability.

Yes, our W713 pump inverter is suitable for sewage pumps and can be configured to work with level sensors instead of pressure sensors. The inverter has four terminals that can be connected to level sensors or float switches for upper and lower pool control.

This setup ensures automatic control of the pump based on water levels, making it ideal for sewage systems and similar applications.

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Bedford has specialized in inverter especially for water pumps since 2007.