Terasaki Contactor TC-150a 240 2A2B
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Detail Terasaki Contactor TC-150a 240 2A2B
The Terasaki Contactor TC-150a 240 2A2B refers to a specific model of magnetic contactor from Terasaki. Here’s a breakdown of what each part of the designation typically means:
Terasaki: The manufacturer, a well-known company in electrical distribution and control equipment.
TC-150a: This is the model series and frame size.
TC: Likely refers to the “TemContact” series of contactors.
150a: Indicates the nominal current rating or frame size. For the TC-150a, it typically signifies a contator with an AC-3 rating of around 150A at 415V, and an AC-1 thermal current (Ith) of 210A or higher.
240: This specifies the control coil voltage. In this case, it means the coil requires 240V AC to operate and energize the contactor.
2A2B (or 2NO 2NC): This indicates the number and type of auxiliary contacts included as standard with the contactor.
2A: Means 2 Normally Open (NO) auxiliary contacts. These contacts are open when the main contacts are open (contactor de-energized) and close when the main contacts close (contactor energized).
2B: Means 2 Normally Closed (NC) auxiliary contacts. These contacts are closed when the main contacts are open and open when the main contacts close.
Key Specifications and Features of Terasaki TC-150a Contactors (General):
Poles: Typically 3-pole contactors for controlling three-phase motors or loads.
Rated Operational Voltage (Ue): Can vary, but commonly rated for systems up to 690V AC or 1000V AC in newer models.
Rated Insulation Voltage (Ui): Often 690V or higher, ensuring electrical isolation.
Rated Impulse Withstand Voltage (Uimp): For the TC series, it can be 6kV or 8kV.
AC-1 Rating (Thermal Current): The current the contactor can continuously carry for non-inductive or slightly inductive loads. For TC-150a, this is generally around 210A to 230A (e.g., at 440V AC).
AC-3 Rating (Motor Load): The current rating for switching squirrel-cage motors during normal operation (making and breaking current when the motor is running). For the TC-150a, it’s typically around 150A for 415V AC-3.
Control Coil: Available in various AC and DC voltages, with 240V AC being specified in your query. Terasaki contactors often feature a common AC/DC coil design and a wide coil operation voltage range.
Auxiliary Contacts: As specified, 2NO + 2NC is a standard configuration for this model. Additional auxiliary contact blocks can usually be added (side-mount or front-mount).
Mounting: Screw mountable, and direct mountable overload relays are often available.
Durability: High mechanical and electrical endurance (e.g., millions of operations).
Standards: Designed and manufactured to international standards like IEC 60947-4-1 and often UL 508.
This contactor is designed for heavy-duty applications, commonly used for controlling motors, lighting, heating, and other inductive loads in industrial and commercial setting
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