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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Product Number | HIER464920P0001 |
| ABB Catalog Description | Current Detection |
| ABB Type Designation | UNS 0017A-P |
| Product Type | Current detection relay |
| Primary Function | Monitors electrical current and provides a relay signal |
| Current Input Range | Not verified in ABB’s publicly accessible product page |
| Rated Input Frequency | Not verified |
| Relay Contact Rating | Not verified |
| Pickup Current | Not verified |
| Dropout Current | Not verified |
| Output Contact Arrangement | Not verified |
| Supply Voltage | Not verified |
| Isolation Rating | Not verified |
| Mounting Method | Not verified |
| Terminal Arrangement | Not verified |
| Operating Temperature | Not verified |
| Enclosure Rating | Not verified |
| Dimensions | Not verified |
| Weight | Not verified |
| Certification | Verify from the product label and applicable ABB documentation |
| Condition | Must be stated as New Original, New Surplus, or Refurbished (tested) |
ABB’s official product page identifies HIER464920P0001 as “CURRENT RELAY, UNS 0017A-P.” The official page does not expose a complete technical data table in the publicly retrieved content.
Several third-party listings also describe the part as a current-detection relay, but conflicting reseller pages incorrectly classify the same number as a processor, I/O module, or other industrial component. Those claims are not sufficient evidence for technical specifications. Use the ABB catalog description and the physical nameplate as the primary identification references.
Product Introduction
ABB HIER464920P0001 is identified by ABB as a current relay with type designation UNS 0017A-P. It is intended for current detection in industrial electrical equipment, where the relay output can be used for alarm, interlock, monitoring, or control logic.
The exact current range, contact rating, supply requirements, and terminal arrangement are not publicly verified. Do not publish this part as an AC800M processor, DCS I/O module, or general-purpose protection relay without a datasheet, nameplate photograph, or system BOM confirming that application.
HIER464920P0001
HIER464920P0001
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Relay never changes state | Current is below pickup threshold, missing auxiliary supply, or wiring fault | ✅ High | Measure the monitored current and verify the relay supply using the terminal diagram | Confirm the pickup specification before replacing the relay |
| Relay remains energized | Current exceeds dropout threshold, welded contacts, or incorrect wiring | ✅ High | Remove the monitored signal where safe and check whether contacts return to normal | Test contacts separately and verify the load circuit |
| No output signal | Open relay contact circuit, incorrect terminal assignment, or failed contact | ✅ High | Check continuity across COM/NO/NC terminals with the relay de-energized and energized | Compare the terminal arrangement with the exact ABB drawing |
| False current alarm | Threshold set incorrectly, electrical noise, or current transformer wiring problem | ✅ Possible | Compare measured current with the actual relay pickup and dropout values | Check the sensing circuit before replacing the relay |
| Relay chatters | Current is near the switching threshold, unstable supply, or loose wiring | ✅ Possible | Trend the monitored current and measure supply voltage during switching | Correct the unstable signal and inspect terminal tightness |
| No indication during load operation | Relay installed in the wrong circuit or current bypasses the sensing path | ✅ High | Trace the conductor through the sensing element and compare it with the approved schematic | Do not rely on physical appearance; verify the current path |
| Contacts overheat | Load exceeds contact rating or inductive load lacks suppression | ✅ High | Measure contact load and inspect suppression across coils or solenoids | Use an interposing relay or suitable suppression if required |
| Relay fails after replacement | Wrong type, incompatible current range, or incorrect supply | ✅ High | Compare the complete HIER464920P0001/UNS 0017A-P marking with the removed device | Do not substitute based on ABB brand alone |
| Protection circuit trips repeatedly | External fault, excessive monitored current, or relay contact problem | ⚠️ Possible | Record current, relay state, and upstream protection indications simultaneously | Diagnose the monitored circuit before changing the relay |
| Physical installation does not match | Revision, package, or application mismatch | ✅ High | Compare dimensions, terminals, mounting, and label photographs | Obtain the ABB drawing or system BOM before installation |
Important: The publicly available information does not establish the electrical ratings for this exact relay. Do not apply current or auxiliary voltage until the terminal diagram and nameplate are confirmed. If the fault remains, provide ABB label photographs, terminal-side images, measured current, supply voltage, contact readings, and the original equipment model to technical support.
Frequently Asked Questions (FAQ)
What is ABB HIER464920P0001?
ABB’s official product record identifies it as “CURRENT RELAY, UNS 0017A-P.” The product number should therefore be treated as a current-detection relay unless the physical unit or system documentation proves a different configuration.
Is HIER464920P0001 an ABB AC800M module?
That identification is not verified. Some reseller pages make unsupported claims that this number is a processor or I/O module, but ABB’s official catalog description identifies it as a current relay. Do not list it as an AC800M module without a matching ABB technical document or nameplate.
What current range does the relay measure?
The publicly retrieved ABB product page does not provide the current range. Obtain the original ABB datasheet, terminal drawing, or a clear label photograph before specifying input current, pickup threshold, or measurement method.
What are the relay contact ratings?
They are not verified from the available official product content. Do not connect a motor starter, solenoid, trip coil, or other inductive load until the contact rating and required suppression are confirmed.
Can I replace it with another ABB current relay?
Not automatically. Match the sensing range, pickup/dropout behavior, auxiliary supply, contact arrangement, terminal layout, mounting method, and environmental rating. “ABB current relay” is not a sufficient compatibility specification.
Is this part obsolete?
The official page provides a product record, but the retrieved content does not state an active lifecycle or discontinuation status. Confirm availability and replacement status through ABB or an authorized distributor.
Is the unit new or refurbished?
The part number does not establish condition. State the actual condition as New Original, New Surplus, or Refurbished (tested). For tested stock, document coil or supply operation, pickup and dropout current, contact continuity, insulation checks, terminal condition, and a signed test report.
