1MYN569697-E ABB Bailey

Product Dimensions：

The 1MYN569697-E is part of ABB's range of cast-resin instrument transformers. It is engineered to transform high primary currents into standardized, lower secondary currents (typically 1A or 5A) that can be safely processed by relays, meters, and control devices. The unit is encapsulated in a high-quality epoxy resin that provides excellent mechanical support and electrical insulation. This specific "E" variant often denotes a particular accuracy class or a specialized mounting configuration intended for integration into ABB’s modular switchgear cabinets like the UniGear or SafePlus series.

Product Parameters

• Product Type: Indoor Support-type Current Transformer

• Rated Voltage: Typically designed for systems up to $12 \text{ kV}$ or $24 \text{ kV}$ depending on the specific insulation level of the series

• Rated Secondary Current: Standardized at $1 \text{ A}$ or $5 \text{ A}$

• Accuracy Class: Available in measurement classes (e.g., 0.2, 0.5) or protection classes (e.g., 5P10, 10P20)

• Insulation Class: Class E or higher, capable of withstanding industrial operating temperatures without degradation

• Rated Frequency: Optimized for $50 \text{ Hz}$ or $60 \text{ Hz}$ power systems

• Thermal Short-time Current: Rated to withstand specific kilo-ampere (kA) levels for 1 or 3 seconds during a fault

• Dielectric Strength: Tested for power-frequency withstand voltage and lightning impulse voltage (BIL)

Product Advantages

A key advantage of the 1MYN569697-E is its Maintenance-Free Design. The vacuum-cast epoxy resin protects the internal windings from moisture, dust, and oxidation, ensuring stable performance for decades. The High Accuracy and Linearity of the core material allow the transformer to provide precise data for billing and sensitive protective relaying.

The Compact and Versatile Mounting allows it to be installed in various orientations within tight switchgear compartments. Additionally, the High Short-Circuit Resistance ensures that the device remains functional and safe even after experiencing severe electrical faults on the grid. Its compliance with international standards like IEC 61869 ensures global interoperability and safety.

Important Considerations and Precautions

The most critical precaution when dealing with the 1MYN569697-E is that the Secondary Circuit Must Never Be Open-Circuited while the primary is energized. An open secondary can lead to extremely high induced voltages that can destroy the transformer and pose a lethal risk to personnel.

During installation, ensure that the Primary Terminals are tightened to the specified torque to prevent overheating due to contact resistance. The Polarity Marks (typically P1/P2 and S1/S2) must be strictly observed to ensure correct directional sensing for protective relays. Furthermore, because this is an indoor-rated component, it should never be exposed to direct outdoor environmental conditions like rain or UV radiation unless housed in a properly rated IP enclosure.

Product Applications

The 1MYN569697-E is widely used in power infrastructure and industrial energy management systems.

• Medium Voltage Switchgear: Integrated into incoming and outgoing feeders to monitor current flow and detect faults.

• Substation Automation: Providing real-time current data to Intelligent Electronic Devices (IEDs) for grid monitoring.

• Industrial Power Plants: Protecting large motors and generators by feeding current data to differential protection relays.

• Commercial Energy Metering: Used in large buildings and factories for high-accuracy revenue metering.

• Retrofitting Projects: Replacing older, oil-filled or outdated dry-type transformers in existing electrical installations to improve safety and accuracy.

We have the same series of models in stock.  If you don't find the model you need, please contact us and we will provide you with an official quotation！

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