ABB UN 0911b-P VAR.1 Voltage Matcher Module

Key Features

Technical Specifications

Applications

The UN 0911b-P VAR.1 is utilized in power generation and industrial excitation systems:

• Power Generation: Synchronous generator synchronization and paralleling

• Industrial Drives: Large synchronous motor excitation systems

• Utility Substations: Voltage regulation and grid connection

• Marine Applications: Shipboard power generation synchronization

Important Notes

• Legacy Component: This module is part of a legacy ABB product line. Verify exact compatibility with your specific SYNCHROTACT or UNITROL system model and hardware revision before ordering.

• Repair and Exchange: Due to the specialized nature of this module, repair and exchange services are available from industrial electronics repair specialists.

• Warranty: Standard warranties on repaired/exchanged units vary by supplier. Confirm warranty terms before purchase.

• Documentation: For definitive technical specifications, refer to ABB's official SYNCHROTACT and UNITROL system documentation for your specific application.

FAQ

Q1: What is the primary function of the ABB UN 0911b-P VAR.1 module?

A: It is a Voltage Matcher Module used in ABB SYNCHROTACT 3 and UNITROL systems. Its primary function is to automatically raise the generator/machine voltage to match the line voltage level before circuit breaker closure during synchronization .

Q2: What is the difference between UN 0911b-P and UN 0911b-P VAR.1?

A: The "VAR.1" designation indicates a specific hardware revision variant. The base model number identifies the module type, while the variant suffix indicates compatibility with defined system configurations.

Q3: What does the alternate part number HEIR448648R1 refer to?

A: HEIR448648R1 (also written as HEIR448648 R0001) is an internal ABB ordering or reference number for this specific module variant . It may be used interchangeably with UN 0911b-P VAR.1 when sourcing the component.

Q4: Is this module still in production?

A: This is a legacy component. Availability is typically limited to existing stock, refurbished units, or repair services from industrial automation aftermarket suppliers.

Q5: How can I verify compatibility with my SYNCHROTACT or UNITROL system?

A: Consult your system documentation or contact ABB technical support with your specific system model and serial number. The VAR.1 designation indicates compatibility with particular hardware revisions.

Q6: Can this module be repaired?

A: Yes. Industrial electronics repair specialists offer repair and exchange services for the UN 0911b-P module. Completed repairs typically include a warranty (varies by provider).