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ABB 290B346A10B Type HU-1 Transformer Differential Relay
- Regular price
- $6,219.00
- Sale price
- $6,219.00
- Regular price
-
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Product Description P/N: 290B346A10B
Description
The ABB 290B346A10B is a Type HU-1 transformer differential relay for detecting internal transformer faults through current comparison. Its harmonic restraint function helps prevent unwanted operation during magnetizing inrush while retaining differential protection for the protected zone.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | ABB |
| Category | Protective Relays |
| Part Number | 290B346A10B |
| Subcategory | Transformer Differential Relays |
| Relay Type | HU-1 |
| Relay Family | HU |
| Operating Technology | Electromechanical |
| Primary Protection Function | Transformer current differential protection |
| Restraint Method | Harmonic restraint |
| Number of Restraint Transformers | 3 |
| Tap Arrangement | Three associated restraint tap rows |
| Internal Elements | Differential unit, harmonic restraint unit, indicating instantaneous trip unit, indicating contactor switch |
| Typical Application | Three-winding transformer protection |
| Weight | 5 lb |
Information About 290B346A10B
The 290B346A10B is part of the HU family of electromechanical transformer protection relays. The HU-1 design incorporates three restraint transformers with associated tap rows, making it suitable for three-winding transformer applications. Its construction combines differential, harmonic restraint, instantaneous trip, and indicating contactor elements. Application requires coordinated current transformer ratios and relay settings for the installation.
Key Features:
- Differential Protection: Detects current imbalance associated with faults inside the transformer protection zone.
- Harmonic Restraint: Restrains operation during transformer magnetizing inrush.
- Three Restraint Inputs: Uses three restraint transformers for compatible protection arrangements.
- Tap Selection: Provides associated tap rows for matching the relay to current transformer circuits.
- Instantaneous Trip Element: Includes a separate indicating instantaneous trip unit.
- Trip Indication: Incorporates an indicating contactor switch within the relay assembly.
The 290B346A10B delivers the reliability and precision required for transformer differential protection in electrical power systems.
Description
The ABB 290B346A10B is a Type HU-1 transformer differential relay for detecting internal transformer faults through current comparison. Its harmonic restraint function helps prevent unwanted operation during magnetizing inrush while retaining differential protection for the protected zone.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | ABB |
| Category | Protective Relays |
| Part Number | 290B346A10B |
| Subcategory | Transformer Differential Relays |
| Relay Type | HU-1 |
| Relay Family | HU |
| Operating Technology | Electromechanical |
| Primary Protection Function | Transformer current differential protection |
| Restraint Method | Harmonic restraint |
| Number of Restraint Transformers | 3 |
| Tap Arrangement | Three associated restraint tap rows |
| Internal Elements | Differential unit, harmonic restraint unit, indicating instantaneous trip unit, indicating contactor switch |
| Typical Application | Three-winding transformer protection |
| Weight | 5 lb |
Information About 290B346A10B
The 290B346A10B is part of the HU family of electromechanical transformer protection relays. The HU-1 design incorporates three restraint transformers with associated tap rows, making it suitable for three-winding transformer applications. Its construction combines differential, harmonic restraint, instantaneous trip, and indicating contactor elements. Application requires coordinated current transformer ratios and relay settings for the installation.
Key Features:
- Differential Protection: Detects current imbalance associated with faults inside the transformer protection zone.
- Harmonic Restraint: Restrains operation during transformer magnetizing inrush.
- Three Restraint Inputs: Uses three restraint transformers for compatible protection arrangements.
- Tap Selection: Provides associated tap rows for matching the relay to current transformer circuits.
- Instantaneous Trip Element: Includes a separate indicating instantaneous trip unit.
- Trip Indication: Incorporates an indicating contactor switch within the relay assembly.
The 290B346A10B delivers the reliability and precision required for transformer differential protection in electrical power systems.
