Siemens TPS3 11 Simplified Explanation of Operation, Specifications, AWG 18 inch-pounds

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 1.888.333.3545.

The TPS3 11 is a Type 1 SPD. The TPS3 11 is suitable for use almost anywhere (not as a plug-in SPD). Type 1 SPDs are evaluated more rigorously by UL 1449 for 2008 NEC® Article 285 compliance. Type 1 SPDs and their connecting leads have been evaluated for line side applications without need for supplemental overcurrent protection. Type 1 SPDs include internal overcurrent protection. As a generalization, there are practical maintenance reasons for installing on the load side of the main overcurrent device (i.e. Type 2 installation). When connected on load side of main disconnect, we recommend connecting via a 30A circuit breaker due to 10 AWG conductors. The circuit breaker serves as a disconnect switch and provides NEC® imposed short circuit protection to the conductors in Type 2 or 4 applications.

Simplified Explanation of Operation

SPDs sense overvoltage and create a momentary short circuit to redirect harmful surge energy to earth ground. SPD’s are not a one time device. They reset automatically and wait for the next surge. SPDs are capable of repeating this function thousands of times.

Parts List and Inspection

Items included in the package consist of the following:

•1 TPS3 11 SPD including 3’ (~1m) conductors

•1 User’s Manual (this document)

If the Flush Mount Kit was ordered, additional parts are supplied as follows:

•1 Flush Mount Plate

•1 Flush Mount Installation Instructions

•4 Mounting Screws

Carefully inspect each item in the package for signs of damage. If damage is found, please contact Siemens TPS Technical Support: 1.888.333.3545. For more information about this product or other Siemens products, visit www.sea.siemens.com.

Figure 2: DIMENSIONS AND WEIGHT

This device features internal overcurrent and overtemperature protection that will disconnect effected surge suppression components at the end of their useful life, but will maintain power to the load – now unprotected. If this situation is undesirable for the application, follow these instructions for replacing the device. TPS3 11 is ultrasonically welded closed and contains no user serviceable parts.

Table 1: Specifications

Specifications
Temperature Operating	-40oC (-40oF) to 60oC (+140oF)
Temperature Storage	-55oC (-67oF) to 65oC (+149oF)
Wire Size & Installation Torque	10 AWG; 18 inch-pounds
Appropriate Circuit Breaker	30A (SPD includes internal OCP)
based on conductor size
NEMA 250 Enclosure Rating	Type 4X with appropriate
	sealing & sealing condulets
Voltage Rating & Application

Before installing SPD, verify by nameplate voltage or model number that it has the same voltage rating as the power distribution system. If unsure call Siemens TPS Tech Support at 1.888.333.3545 before proceeding. The SPDs specifier or user should be familiar with the configuration and arrangement of the power distribution system. The system is defined by how the secondary windings of the transformer supplying the service entrance main or load are configured. This includes whether or not the transformer windings are referenced to earth via a grounding conductor. The system configuration is not based on how any specific load or equipment is connected to a particular power distribution system. SPDs should be installed per the distribution system, not per a load or motor’s wiring connection.

For example, suppose a 480V three phase motor appears to be connected as a 480V Delta. In actuality, the serving distribution system might be a 480Y/277V grounded Wye, with or without a neutral pulled to the motor or MCC. The system is still a 480Y/277V Wye, even though the load is connected as a Delta. A grounded Wye has a defined reference to ground (i.e., neutral is bonded to ground). In contrast, some Delta systems are ungrounded, which have no reference to ground.

TPS3 11’s have demonstrated 200kA Short Circuit Current Ratings (SCCR) including leads (120/240V Split phase models have 100kA SCCRs). See UL Label markings on SPD or see Data Sheet for specs.) Supplemental overcurrent protection is not required to protect this SPD. However, NEC® convention requires that connecting conductors have overcurrent protection in Type 2 or 4 applications. Follow applicable codes.

Table 2: Model number decoder

Model	Voltage	Service Voltage
	Code
TPS3A11	A	240/120V 1Ø, 3W Plus Ground,
TPS3B11	B	240/120V 3Ø, 4W Plus Ground High Leg Delta
TPS3C11	C	208Y/120V 3Ø, 4W Plus Ground
TPS3D11	D	240v 3Ø, 3W Plus Ground
TPS3E11	E	480Y/277V 3Ø, 4W Plus Ground
TPS3F11	F	480v 3Ø, 3W Plus Ground
TPS3G11	G	600v 3Ø, 3W Plus Ground
TPS3K11	K	380Y/220V 3Ø, 4W Plus Ground
TPS3L11	L	600Y/347V 3Ø, 4W Plus Ground
TPS3S11	S	400Y/230V 3Ø, 4W Plus Ground