Description

SIEMENS 3AY1715-6L with VS30029P/VS30041 Auxiliary Contact Blocks

Product Overview

This product combination consists of a Siemens SIRIUS 3RT series power contactor and its associated snap-on auxiliary contact blocks. The part numbers specify a complete, ready-to-assemble contactor unit for industrial control applications.

3AY1715-6L: This is the base order number for a specific 6-pole (6P) power contactor from the Siemens SIRIUS 3RT portfolio. The “6L” suffix is critical, typically indicating a specific coil voltage (e.g., 24V DC, 110V AC, etc.). This contactor is designed to switch six main power circuits simultaneously.
VS30029P / VS30041: These are order codes for modular auxiliary contact blocks (also known as contactor relays or signalling contacts). They are designed to mechanically and electrically attach to the sides of the main contactor, providing additional low-current contacts for control and monitoring circuits.

Core Component: 6-Pole Power Contactor (3AY1715-6L)

This is a six-pole, normally-open (NO) power contactor. Its primary function is to make and break the power supply to a load via six separate contacts using a single control signal (coil energization). This configuration is essential for specific, complex switching tasks such as reversing star-delta starters, where all six motor winding ends need to be reconfigured. It is also used for switching multiple independent single-phase loads or complex multi-circuit applications.

Accessories: Auxiliary Contact Blocks (VS30029P & VS30041)

These are add-on modules that snap onto the main contactor to expand its functionality. They operate synchronously with the main contacts and are used for:

Control Circuit Interlocking: Creating electrical safety interlocks (e.g., between forward and reverse contactors).
Status Signalling: Providing feedback signals to a PLC, HMI, or pilot lamps (e.g., “Contactor Engaged,” “Fault”).
Logic Expansion: Adding extra control contacts for more complex sequencing without requiring additional relays.

3AY1715-6L VS30041

Technical Specifications

Component	Parameter	Typical Specification (Based on Siemens SIRIUS 3RT Series)	Notes & Verification
Main Contactor 3AY1715-6L	Product Line	Siemens SIRIUS 3RT	Well-established industrial control series.
	Rated Operational Current (Iₑ)	Approx. 40A – 75A at AC-3, 400V	Must be confirmed via datasheet. “1715” indicates a larger frame size.
	Rated Operational Voltage (Uₑ)	Up to 690V AC, 50/60 Hz	Suitable for standard three-phase systems.
	Motor Switching Capacity (AC-3)	~18.5 kW – 37 kW (25 HP – 50 HP) at 400V 3-phase.	Depends on exact current rating.
	Poles	6 Main Poles (6P), all Normally Open (NO)
	Coil Voltage (Code -6L)	Specific voltage defined by the full suffix. Common examples: `-6L02`=24V DC, `-6L03`=110V AC, `-6L04`=230V AC. CRITICAL: Check the label on the coil or the complete order code on the device.	The exact coil voltage is paramount for correct operation.
	Coil Power Consumption	~8 W (DC) / ~9 VA (AC) – typical values.
	Mechanical Life	>10 million operations.
	Electrical Life (AC-3)	>1 million operations.
Auxiliary Contact Block VS30029P	Type	Snap-on auxiliary contact block.
	Contact Configuration	Likely 1 NO + 1 NC (One Normally Open + One Normally Closed).	A common configuration for providing both a “seal-in” contact and a status signal.
	Contact Rating	Typically: 10 A at 600V AC (AC-15), 4 A at 250V DC (DC-13).	Suitable for control circuits, not main power.
Auxiliary Contact Block VS30041	Type	Snap-on auxiliary contact block.
	Contact Configuration	Likely 2 NO (Two Normally Open contacts).	Used to provide two additional “on” signals.
	Contact Rating	Same as above (~10A AC-15).

Main Features and Advantages

6-Pole Design for Complex Switching: Enables control of intricate circuits like reversing star-delta motor starters with a single device, reducing panel space and wiring complexity compared to using multiple 3-pole contactors.
Modular SIRIUS Design: Both the contactor and auxiliary blocks follow Siemens’ modular principle. Auxiliary contacts, mechanical interlocks, and timer modules can be added easily on-site without tools, allowing for flexible and customized solutions.
High Reliability & Long Service Life: Built for demanding industrial environments with high electrical and mechanical durability, ensuring reliable operation over millions of cycles.
Clear Diagnostics: Integrated mechanical flag indicator shows contact position. Auxiliary contacts provide electrical signals for remote monitoring and integration into control systems.
Global Compliance: Manufactured to international standards (IEC/EN 60947-4-1, UL 508), ensuring safe and approved operation.

Application Fields

This specific 6-pole configuration is primarily used in:

Motor Control: Reversing Star-Delta Starters for three-phase asynchronous motors. The six poles are necessary to switch the motor windings between star (for starting) and delta (for running) configurations, and to reverse rotation.
Specialized Switching: Control of multiple independent single-phase circuits (e.g., heating banks, lighting stages) that must be activated simultaneously.
Transformer & Capacitor Bank Switching: Applications requiring multiple pole switching.
Complex Machinery: Automated systems in packaging, material handling, or machine tools where complex power sequencing is required.