Siemens TPS3G09 Gebruikershandleiding - Pagina 6

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Connecting Optional Form C Dry Contact & Audible Alarm

("D" sufﬁx near end of model number)

Three (3) 3' (~1m) 18 AWG wires are included through the

nipple with this option. (These are smaller than the 10 AWG

SPD conductors.) Gray is Common, Blue is Normally Open and

Red is Normally Closed. Normally Open and Normally Closed

are based on the 'Normal' condition of the unit being energized

and operating correctly. When not energized, or not operating

correctly, the contacts' state will be opposite of 'Normal'. (We

generally recommend the Normally Closed conﬁguration because

it detects disconnected or failed wiring whereas Normally

Open does not.) The contact is rated 250V, 5A. Higher energy

applications require supplemental relaying. This option monitors

suppression element condition and is not intended for use as

phase loss or phase detection monitoring. If the Dry Contacts are

not utilized, insulate lead ends, coil and secure. Audible Alarm

will still function correctly.

Remote Indication Option

This is a supplemental diagnostic LED that can be mounted in a

conspicuous location if the SPD is installed such that on-board

LEDs are not readily visible. A green LED bezel assembly includes

two pre-attached wires and two butt-splice connectors. The

SPD includes two yellow 18 AWG wires, pre-wired through the

SPD's nipple mounting connection. Pre-plan the installation per

normal installation Instructions. Mount the LED assembly in an

appropriate conspicuous location. Connect the LED wires to the

yellow SPD wires with the provided butt-splice connectors. These

are not polarity sensitive. Test by energizing and de-energizing

SPD. Operation is straightforward: green LED On = SPD is OK. If

the LED is out, the SPD has failed, power is not present, or one of

more phases are not energized.

Figure 6: Dry Contact

•

Normally Closed (suggested):

Use Gray and Blue

•

Normally Open:

Use Gray and Red

Power Leads

Normally Closed

Blue

Gray

Common

Red

Normally Opened

Dry Contact Leads

Blue

Grey

Normal Operation

Green LED Indicators

Each phase's LED Indicator illuminates when the SPD is energized

and operating correctly. Every suppression element is monitored

and connected by logic to the LED. Should any suppression

element fail, the green LED will extinguish.

Form C Dry Contact and Audible Alarm Option

Similar to the Green LEDs above, the dry contact will change

state and the audible alarm will sound upon suppression element

failure. The audible alarm may be silenced by removing power

to the SPD.