NEC Art 285 & UL | Siemens TPS3 manual

Storage

The unit should be stored in a clean, dry environment. Storage temperature is -55oC (-67oF) to +85o C (+185o F). Avoid exposing the unit to areas of high condensation. All of the packaging materials should be left intact until the unit is ready for installation. If the unit has been stored for an extended period of time, it may be necessary to clean the unit and make a complete inspection of the unit prior to installing and placing into service.

Industry Standards Changes - 2009

UL 1449 Third Edition and 2008 NEC® Article 285 generated substantial changes.

•The term TVSS changed to SPD

•Types 1, 2, 3 & 4 SPDs are created

•UL 1449 clamping voltage performance testing changed from 500A to 3,000A

•UL 1449 added new Nominal Discharge Current testing (I nominal, or In), which consists of more rigorous duty-cycle testing

The SPD Type category is important to understand before installing any SPD. Type 1 and 2 SPDs are fully UL Listed devices whereas Type 4 SPDs are UL Recognized devices.

Type 1 – Installed on line or load side of the Main Overcurrent Protection (OCP), similar to obsolete products known as Secondary Surge Arrestors, except now includes rigorous safety testing. Includes all OCP & safety disconnectors inside the SPD.

Type 2 – Installed on load side of the Main OCP, similar to previous products known as TVSS. May or may not require external OCP. Type 3 – Point of Utilization, direct plug in type devices, surge strips, etc. Theses devices are intended for installation 10 meters from the panel (rationale based on IEEE Cat. A location).

Type 4 – Surge suppression components, could be a basic component or a complete module. Type 4 components can be tested for Type 1, Type 2 or Type 3 applications.

Figure 1: SPD Types

2008 NEC Art 285 & UL 1449-3

SPD Types: Types 1, 2, 3, & 4

Based on Location within electrical distribution system

(also coincides with ANSI/IEEE C62.41.2 - 2002 Categories C, B &A)

Siemens TPS3 SPDs have the following Type designations

Table 1: Type Designations

Siemens TPS3 Series	Type Rating

TPS3 01 & L1	Type 4 for Type 1 applications

TPS3 05 & L5	Type 1

TPS3 06 & L6	Type 4 for Type 1 applications

For further information, please review latest editions of NEC® Art. 285, UL 1449, contact your local Siemens sales office or contact Siemens TPS Tech Support at (888) 333-3545.

Equipment Performance

As SPDs sense overvoltage, they create a momentary internal short circuit, thereby redirecting harmful surge energy to earth ground. SPDs are capable of repeating this function repeatedly. For optimum protection, staged surge suppression should be implemented at the service entrance and all other distribution or panelboard locations feeding sensitive equipment.

Voltage Rating

Prior to installing the TPS3 SPD, verify that the unit has the correct voltage rating for the equipment installed by checking the nameplates of both the equipment and TPS3 module. The service type should match the intended power source. See Table 2 on the following page for voltage applications.

TPS3 specifications

Siemens TPS3 is a sophisticated technology advancement that has significantly impacted the field of industrial automation. As part of Siemens’ portfolio of control systems, TPS3 is designed to enhance process efficiency, improve accuracy in operations, and ensure greater reliability and flexibility across various industrial sectors.

One of the key features of the Siemens TPS3 is its modular architecture. This modularity allows users to customize the system according to their specific needs and operational requirements. Each module can be added or removed with ease, facilitating the scalability of operations. This flexibility is critical for businesses aiming to adapt their capacity based on fluctuating market demands.

The TPS3 employs state-of-the-art control technologies, integrating advanced algorithms for real-time data processing and control. This capability enables operators to achieve precise control over processes, ensuring that production runs smoothly and meets quality standards. Advanced predictive maintenance features are also embedded within the system, allowing for the minimization of downtime and optimization of maintenance schedules through data analytics.

Another significant characteristic of the TPS3 is its user-friendly interface. The intuitive design allows operators to easily monitor and manage processes through graphical displays and straightforward navigation. This usability reduces the learning curve for new staff and increases overall operational efficiency.

Siemens emphasizes connectivity in the TPS3, with robust support for Industry 4.0 principles. The system can seamlessly integrate with IoT devices and other digital platforms, enabling extensive data collection and analytics. This connectivity enhances decision-making by providing insights into process performance and resource utilization.

Security is also a critical aspect of the TPS3, with built-in features that protect against cyber threats. These security measures include encrypted communication protocols and robust firewall systems to safeguard sensitive operational data.

Overall, the Siemens TPS3 stands out for its modular design, real-time control capabilities, user-friendly interface, strong connectivity features, and commitment to security. These characteristics make it a potent tool for modern industries seeking to optimize their processes, reduce costs, and adapt to the ever-evolving technological landscape. With its comprehensive feature set, the TPS3 is poised to drive greater efficiency and innovation in the realm of industrial automation.