Operation
Diagnostic Indication
Phase indicator LEDs (Green)
Each phase is equipped with a Green LED. Should complete loss of surge protection occur on each phase, the Green LED will extinguish and the Red Service LED will flash. Every suppression element is monitored. Note that the Green LED indicators will drop out due to loss of power or severe under voltage.
Service LED (Red)
Flashes in the event of a problem. The Red Service LED is slaved to the Green LEDs via logic and will illuminate when any Green LED extinguishes.
Audible Alarm Option
If equipped with optional Dry Contact and Audible Alarm, these options are slaved via logic to the Green LEDs. In the event of a problem, the dry contacts will chage state and the audible alarm will sound. The audible alarm may be silenced by deenergizing the SPD.
Figure 7: Diagnostic Display
TYPE 1 SURGE PROTECTIVE DEVICE
WWW.SIEMENS.COM
SERVICE | CAUTION |
| |
V DANGER | |||
| |||
| Conducting | Hazardous Voltage | |
| dielectric and/or | will cause severe | |
| injury or death. | ||
| will cause internal |
| |
| damage to the unit. | Turn off power | |
| Do not perform any | before removing | |
| tests while installed. | cover. |
Dry Contact Option
Two sets of Form C dry contacts are included with the Dry Contact option. Dry Contacts change state during inoperative conditions, including loss of power. Any status change can be monitored elsewhere via Dry Contacts.
A Terminal Block includes two sets of Normally Open (N.O.) and Normally Closed (N.C.) contacts. Both sets of contacts operate the same. This is shown in Figure 8.
Figure 8: Dry Contact Pin Configuration
A typical application using a Normally Closed configuration would connect to one set of the N.C. and Common terminals. During an inoperative condition, the SPDs dry contact would change state from normally closed to open. We generally suggest the Normally Closed configuration because it will detect a wiring defect, such as cut wire(s), where N.O. will not.
Please note:
Dry Contacts are designed for low voltage or control signals only.
Maximum switching current is 5A
Maximum switching voltage is 240V DC or AC.
Higher energy applications require additional relay implementation outside the SPD.
An optional Remote Monitor accessory is available to provide visual and audible status. The Remote Monitor will consume one of the two sets of Dry Contacts.
Remote Monitor Accessory Option
A Remote Monitor is available for remote annunciation. It requires a standalone 120V power source (wall plug transformer) and uses one set of Form C dry contacts. The Remote Monitor can be configured to monitor several Siemens TPS3 SPDs simultaneously. Installation is detailed in a separate document. Contact factory as appropriate.
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