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MOR8, LOCATED IN PLURDALEN, NEAR MO I RANA


1 FEBRUARY 2016: UPS INSTALLATION


Due to frequent power outages in the MOR8 area we want to install a UPS.

Click for larger version. Click for larger version.
Click for larger version.

Link all photos 25 Feb 2016

1.1 UPS ordered: APC model name Back-UPS CS 650


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Mfr APC - Schneider
Model name Back-UPS CS 650
Model number BK650EI
S/N 4B1536P22589
Supl ELFA DISTRELEC
Supl P/N 16973999
User Manual PDF (Also local copy.)
Material Safety Data Sheet (MSDS) (due to lead battery) APC_lead_battery_eng_msds.pdf
Battery type Maintenance-free sealed Lead-Acid battery with suspended electrolyte : leakproof
Replacement battery (supposed to last 3-6 years, depending on number of deep discharge cycles). Model RBC17

ELFA Distrelec, P/N: 16947539

Runtime graph Click to enlarge.
Runtime graph. Click to enlarge.
Cal/test data Click to enlarge.
Click to enlarge.

1.2 Test 24 February 2016


After charging for 12 hours, battery voltage is 13.43 V, measured unloaded, at 22 deg. C.

State of charge 12 V battery - unloaded - at 25 deg C [V] Each cell [V]

Source: ....

1.3 Configuration, 24 February 2016


From User Manual:
UPS configuration
Sensitivity setting is set to HIGH -> 3 indicators flashing (yellow, red and red - number 2,3 and 4 counting from top)

Sensitivity setting: HIGH -> 3 indicators flashing (yellow, red and red - number 2,3 and 4 counting from top)

1.4 Status indicators, alarms


2 2011 VISIT - TECHNICAL ISSUES


2.1 Dehn "Blitzductor", KT, Typ VED, Art.no.: 919 410


The power supply wire pair and three sensor signal lines are protected by four Dehn "Blitzductor", KT, Typ VED, Art.no.: 919 410.

Diagram Dehn Blitzductor, KT, Typ VED, Art.no.: 919 410
Diagram Dehn "Blitzductor", KT, Typ VED, Art.no.: 919 410

Specifications KT, Typ VED, Art.no. 919 410:

Nominal voltage
15 Vrms
Max continuous operating voltage
17,25 Vrms (1,15 * 15 Vrms)

The units were installed several years ago when the seismometers were passive types. They should be replaced as soon as possible since they do not match the signal levels that the current seismometer (Nanometrics Trillium 120PA) use. There are many types of line protection devices available. We should consider units that offer more comprehensive protection. Also, the earthing system at the site must be checked before any new designs are introduced.


Dehn "Blitzductor", KT, Typ VED, Art.no.: 919 410 installed as of November 2011. Should be replaced as soon as possible.

2.2 Earthing system


The earthing system at the site must be checked, possibly by qualified electrician so we are sure it conforms to national electrical code.

The grounding wires are divided into two branches. One branch is terminated in grounding rod that seems to be insufficient (very short). The earth electrode terminating the other branch was not seen.

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Page last modified on November 21, 2016, at 10:57 AM
Electronics workshop
Department of Earth Science - University of Bergen
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