BNS36-02ZG-ST-L BENDER

BNS36-02ZG-ST-L BENDER Coupler for external

Product  Description：

Bender External Coupling Devices (such as the AGH series) are specialized high-voltage accessory modules designed to interface with Bender ISOMETER insulation monitoring devices. In ungrounded electrical distributions (IT systems), standard monitors have a specific nominal voltage limit. An external coupler functions as a high-impedance voltage attenuator and scaling gateway, allowing the low-voltage monitoring unit to safely assess the insulation resistance of systems operating at significantly higher external voltage levels without exposing the core logic to catastrophic electrical stress.

Product Parameters

The technical properties of Bender external couplers are engineered to handle demanding electrical properties and provide high-voltage insulation:

• Nominal System Voltage Extension: Extends monitoring capabilities up to AC 1150V or DC 1760V for standard compact modules, with heavy-duty variations supporting medium voltages up to 7200V AC.

• Frequency Range Support: Accommodates system frequencies ranging from pure DC up to 460Hz, making them highly compatible with variable frequency drives (VFDs).

• Internal DC Resistance: Features precise high-impedance internal scaling resistors, typically rated at 80 kilohms or 160 kilohms depending on the model, with tight tolerances of around 2 to 4 kilohms.

• Rated Impulse Voltage: High surge immunity with a rated impulse withstand voltage ranging from 8kV to 11kV.

• Power Consumption: Highly optimized, drawing less than or equal to 10W even when operating at maximum voltage extensions.

• Enclosure Protection Class: Designed for integrated panel layout, offering IP30 protection for the main housing built-in components and IP10 for the termination connection points.

Product Advantages

Integrating a Bender external coupling device provides key design and safety advantages for complex industrial electrical networks:

• Voltage Range Flexibility: Allows a single type of standard insulation monitor to be deployed across vastly different voltage grids, simplifying inventory management and lowering system costs.

• Galvanic Isolation and Safety: Provides high basic insulation strength, safeguarding testing personnel and low-voltage control circuits from high-potential main lines.

• Reliable VFD Tracking: Excellent compatibility with modern power electronics, allowing accurate insulation reading despite heavy harmonic distortion and switching noise from VFDs and inverters.

• Robust Environmental Construction: Built to withstand harsh working conditions, operating effectively in ambient temperatures from minus 40 to plus 70 degrees Celsius.

• Compliance with Transit Standards: Select variants meet strict international railway standards (such as DIN EN 50155 and DIN EN 45545-2) for fire protection and mechanical shock resistance.

Product Applications

These external couplers are used wherever high-voltage networks must maintain continuous ungrounded operation:

• Renewable Energy Grids: Monitoring the ungrounded DC side of massive solar inverter arrays and battery energy storage systems (BESS).

• Electric Vehicle Infrastructure: Placed within high-capacity EV fast-charging stations to continuously verify insulation integrity before and during the vehicle charging cycle.

• Rail and Transit Systems: Ensuring the safety of electric locomotives, main line signaling circuits, and subway traction power supplies.

• Marine and Offshore Engineering: Supporting the main power grids of ships, drilling platforms, and thruster control cabinets where unexpected grounding causes catastrophic down-time.

• Mining and Heavy Manufacturing: Monitoring high-voltage variable speed motor circuits driving crushers, conveyor lines, and excavation equipment.

Important Precautions

To avoid serious injury and maintain system integrity, the following installation and usage guidelines must be strictly followed:

• Earth Ground Connection: All protective earth (PE) connections on the coupling device and the paired insulation monitor must be tied securely to the main protective earth conductor before powering on the system.

• High Voltage Discharging: De-energize the entire external power network and confirm zero voltage on the lines before attempting to install, adjust, or remove the coupler.

• Clearance Maintenance: Ensure appropriate spatial separation and creepage distances are maintained on the mounting panel around the high-voltage input terminals to avoid arcing.

• Correct Pairing Validation: Never connect an external coupler to an insulation monitor that is not explicitly designated as compatible in the product data sheets, as mismatching will cause measurement failure or component burnout.

• Environmental Protection: Do not expose the module to environments exceeding 98 percent relative humidity, or areas containing conductive dust and oil mist, unless it is installed inside a sealed enclosure with at least an IP54 protection level.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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JUSTWELL PTE. LTD

Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.