ABB Auxiliary Contact Block - HKF1-20
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Product Information
Full details
This guide is for electricians and control panel builders using ABB miniature circuit breakers. The HKF1-20 auxiliary contact block provides reliable signaling for remote monitoring or interlocking, enhancing automation system safety and efficiency. A key consideration is its front-mounting design and compatibility with specific ABB breaker series.
All features
| Series | HKF1-20 |
|---|---|
| Model Part Number | 1SAM201901R1002 HKF1-20 |
| Brand | ABB |
Extended Product Information
FAQs
What is the primary function of the HKF1-20 auxiliary contact block?
Its primary function is to provide remote signaling or interlocking capabilities for compatible ABB miniature circuit breakers. It allows external systems to monitor the breaker's status (e.g., tripped or closed) or be used in control logic.
What types of ABB breakers are compatible with the HKF1-20?
The HKF1-20 is compatible with ABB MO132, MO165, MS116, MS132, and MS165 series miniature circuit breakers when mounted from the front.
What is the maximum current and voltage rating for the auxiliary contacts?
The auxiliary contacts are rated for a maximum of 3 Amps and 250 Volts.
Can this auxiliary contact block be used for power switching?
No, the HKF1-20 is designed for signaling circuits only due to its low current rating (3A). It is not suitable for switching main power loads.
How many contacts does the HKF1-20 provide, and what type are they?
It provides two contacts, both of which are Normally Open (NO).
Is special tooling required for installation?
No special tooling is typically required. The contact block snaps directly onto the front of the compatible breaker. Basic wire stripping and connection tools may be needed for wiring.
What does 'front mounting' mean in this context?
Front mounting means the auxiliary contact block attaches to the front face of the miniature circuit breaker, allowing for easy access and installation without needing to remove the breaker from its mounting rail.
Troubleshooting
Auxiliary contact does not switch
Verify the breaker is properly mounted to the HKF1-20. Ensure the breaker is in the appropriate state (ON or tripped) to activate the contacts. Check wiring connections for continuity and correct terminal assignment.
Contact block is loose on the breaker
Remove and re-attach the contact block, ensuring it clicks securely into place on the breaker's mounting points. Check for any obstructions preventing full engagement.
Wiring terminal is difficult to connect
Ensure the wire conductor is stripped to the appropriate length and is free of fraying. Use the correct wire gauge for the terminal.
Pros and Cons
Pros
- Enhances breaker functionality with remote signaling capabilities.
- Simple front-mounting installation reduces setup time.
- Reliable switching for critical control and monitoring circuits.
- Compact design preserves panel space.
- Compatible with a range of popular ABB MO and MS series breakers.
Cons
- Limited to 3A current rating, not suitable for power switching.
- Requires compatible ABB breakers; not a universal accessory.
- Adds a small amount of physical depth to the breaker assembly.
- Only provides Normally Open contacts, may require additional wiring for Normally Closed logic.
Setup, Compatibility & Care Instructions
Setup:
- Ensure the compatible ABB miniature circuit breaker (e.g., MO132, MO165, MS116, MS132, MS165) is de-energized and isolated.
- Align the HKF1-20 auxiliary contact block with the mounting points on the front of the breaker.
- Firmly push the block onto the breaker until it clicks into place, confirming a secure attachment.
- Connect wiring to the terminals on the auxiliary contact block according to your circuit diagram.
Compatibility:
This accessory is specifically designed for front mounting on ABB MO132, MO165, MS116, MS132, and MS165 series miniature circuit breakers. Verify your breaker model before purchasing.
Care:
- Keep the contact block clean and free from dust and debris. Use a dry or slightly damp cloth for cleaning; avoid solvents.
- Regularly inspect wiring connections for tightness and signs of wear.