Brand:ABB PLC Item No.:1VCR004290G0005 Product Origin:Sweden (SE) Product Dimensions:160 × 55 × 110 mm Product Weight:0.83 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The ABB 1VCR004290G0005 is a specialized MU undervoltage release coil assembly for compatible ABB vacuum circuit breaker mechanisms. It is an important component of the breaker control system because it provides a voltage-dependent release function.
In medium-voltage switchgear, circuit breakers often use several auxiliary operating components, including opening releases, closing releases, undervoltage releases, geared motors, and auxiliary switches. The MU undervoltage release serves a different purpose from a standard shunt opening release: its operation is associated with the availability of the specified control voltage.
The 1VCR004290G0005 is specifically rated for 110–132 V DC / 110–127 V AC, 50–60 Hz control applications. This electrical specification should be carefully matched before replacement.
The component is associated with ABB vacuum circuit breaker spare-parts systems, including compatible VD4 and Vmax applications. For maintenance work, technicians should verify the exact breaker configuration and installed operating mechanism rather than selecting the component solely by physical appearance.
Technical Specifications
Specification
Details
Brand
ABB
Model
1VCR004290G0005
Product Type
Under Voltage Release
ABB Component Designation
MU Coil Assembly
Function
Undervoltage Release
Control Voltage
110–132 V DC / 110–127 V AC
Frequency
50–60 Hz for AC supply
Compatible Application
ABB Vacuum Circuit Breaker Operating Mechanisms
Associated Breaker Families
VD4 / Vmax
Dimensions
160 × 55 × 110 mm
Weight
0.83 kg / 1.83 lb
Installation
Circuit Breaker Operating Mechanism
Application
Medium-Voltage Switchgear
The control-voltage rating is one of the most important selection criteria for this component. The existing circuit breaker documentation and installed MU release specification should be checked before ordering or installation.
Recommended Related Models
Model
Description
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MU Undervoltage Release, 220–250 V AC/DC
ABB 1VCR004289G0005
MO1 Opening Release, 110–132 V DC / 110–127 V AC
ABB 1VCR004291G0005
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The ABB 1VCR004290G0005 is a specialized undervoltage release for compatible ABB vacuum circuit breaker mechanisms. For reliable replacement, always match the complete part number, control-voltage rating, and breaker operating-mechanism configuration before installation.
Applications in Medium-Voltage Switchgear
The ABB 1VCR004290G0005 is used as an undervoltage release within compatible vacuum circuit breaker mechanisms. Its function is closely related to the breaker control circuit and the availability of the designated auxiliary control voltage.
Typical applications include:
ABB VD4 vacuum circuit breakers
ABB Vmax vacuum circuit breakers
Medium-voltage switchgear
Industrial power distribution
Electrical substations
Motor and transformer feeder protection
Industrial switchboards
Circuit breaker maintenance
Vacuum breaker replacement projects
Electrical protection and control systems
The component is particularly relevant where the circuit breaker operating mechanism requires a 110–132 V DC or 110–127 V AC undervoltage release coil.
Key Advantages and Functional Benefits
Dedicated Undervoltage Release Function
The 1VCR004290G0005 provides the MU undervoltage release function required by compatible ABB circuit breaker operating mechanisms.
Wide Control-Voltage Compatibility
This version is designed for 110–132 V DC or 110–127 V AC at 50–60 Hz, making it suitable for control systems using either of these specified supply ranges.
Designed for ABB Vacuum Circuit Breakers
The component belongs to ABB's range of circuit breaker operating-mechanism accessories and is associated with compatible VD4 and Vmax applications.
Supports Controlled Breaker Operation
An undervoltage release helps the circuit breaker respond appropriately when the designated control voltage is lost or falls below the required operating condition.
Compact Mechanical Integration
The 160 × 55 × 110 mm assembly is designed for installation within the corresponding breaker mechanism rather than requiring a separate external control enclosure.
Suitable for Maintenance and Replacement
The component can be used when an existing MU undervoltage coil assembly needs replacement because of electrical failure, aging, coil damage, or abnormal release behavior.
Technical FAQs
1. What is the ABB 1VCR004290G0005 used for?
The ABB 1VCR004290G0005 is an MU undervoltage release coil assembly used in compatible ABB vacuum circuit breaker operating mechanisms.
2. What control voltage is specified for the 1VCR004290G0005?
This model is specified for 110–132 V DC or 110–127 V AC at 50–60 Hz.
3. What does MU mean in this application?
MU identifies the undervoltage release function within the circuit breaker operating mechanism. The MU assembly responds to the designated control-voltage condition.
4. Which ABB circuit breakers can use this component?
The part is associated with compatible ABB VD4 and Vmax vacuum circuit breaker mechanisms. Exact compatibility should be confirmed against the specific breaker model and operating mechanism.
5. What happens when the control voltage is lost?
The undervoltage release is designed to respond to the loss or insufficient level of its designated control supply, causing the breaker mechanism to perform the release function according to its operating design.
6. What symptoms can indicate a defective undervoltage release?
Possible symptoms include unexpected breaker release, inability to maintain the required breaker operating condition, failure of the intended undervoltage function, or abnormal behavior in the breaker control circuit.
7. Can the 1VCR004290G0005 replace a 24 V or 48 V MU coil?
No. The control-voltage version is a critical specification. A 110–132 V DC / 110–127 V AC version should not be substituted for a differently rated MU assembly without confirming compatibility with the breaker design.
8. What should be checked before installing this release?
The complete ABB part number, circuit breaker type, operating mechanism, control voltage, wiring arrangement, and existing MU assembly should be verified before installation.
9. How should an undervoltage release be tested?
Testing should follow the applicable circuit breaker maintenance procedure. The control circuit and release function should be evaluated using appropriate electrical test equipment by qualified personnel.
10. What safety precautions are required when replacing the MU assembly?
The circuit breaker must be placed in the correct maintenance condition, isolated from hazardous energy sources, and secured against unintended operation. Control-circuit isolation and stored mechanical energy must also be addressed before work begins.
