6021642 DIAM4200 2.5 to 20KVA rev 1-9.docx
I-24
I.8.3 OUTPUT LIGHTNING ARRESTORS
This option consists of two lighting arrestors, which protect the CCR at each end of the loop. Current
discharge is conducted through the CCR’s main earth link, which must be of sufficient gauge.
If a particularly large current flow occurs (e.g. lightning strike directly on the loop cable), the lightning
arrestor can short-
circuit itself permanently, thus creating a “Earth fault”. In this case, the two lightning arrestors
must be replaced unconditionally.
If the CCR is not fitted with an optional cutout device, it is mandatory to disconnect the lightning arretors
in order to perform insulation measures.
I.8.4 INPUT LIGHTNING ARRESTORS
This option include two lighting arrestors on input mains, in order to protect the CCR. Current discharge
is conducted through the CCR’s main earth link, which must be of sufficient gauge.
The active part of the protector can be replaced, in case of failure or short circuit due to particularly high
energy overvoltage.
I.8.5 CASTERS
CCRs can be delivered with or without chassis casters, preferably uni-directional (other models on
request)
I.8.6 BURNT LAMPS DETECTION:
This option determines the number of burnt lamps in the output load.
This is carried out by measuring the load Voltage versus Current phase shift.
Internal parameters of the data collection system must be re-initialised each time the loop is modified
(addition of transformers, replacement of transformers by more powerful ones, etc) or if any settings have
been changed (load adjustment, for example).
To increase the accuracy of the measurement, it is necessary to perform the calibration with
0
lamp
burned (1
st
stage) and
minimum 3%
of lamps burned (2
nd
stage).
Before perform the calibration, it is necessary to set the following paramete
r in the menu “
Calibration
”:
The X number must be set in function of the total number of lamps in the loop to realize the calibration
(X can be set for 1 to 10 lamps).
Example: if the load loop is about 20 lamps, set the X parameter to 1 ( 1/20 = 5% > 3%).
Example: If the load loop is about 200 lamps, set the X parameter to 6 lamps. (6/200 = 3%).
Initialisation can be carried out in two stages:
1. The loop should be connected up to the CCR with
no
burnt lamp (all lamps are working).
Go into the “
Cali
bration”
menu then:
Summary of Contents for OCEM AUGIER DIAM4200 Series
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