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Instructions for Use
3.5.
Test mode
The ComPass B features a built-in test mode. This mode can be activated via the
•
front panel control
•
RS485/MODBUS interface
•
external input contact
During test mode, the ComPass B controls both its electronics and its software. The yellow light of
the multicolour LED starts flashing to indicate the test mode.
If an error is detected on the device, the multicolour LED flashes yellow, either in a double or triple
flash mode which depends on the type of error. Further information on the error can be gathered
either from the front panel control or via the RS485/MODBUS interface (see section 3.1.5).
4.
Installation
4.1.
Safety instructions
•
Make sure that the ComPass B is only used for the purpose described in the present opera-
ting manual.
•
When installing the device, the "five safety rules" as defined by the DIN VDE 0105 standard
and the accident prevention rules as per BGV A3 "Electrical Installations and Equipment"
must be complied with.
•
Make sure that current transformers are mounted and dismounted and cabling work is exe-
cuted only in a de-energized condition on the disconnected and earthed medium-voltage
switchgear.
•
If current transformers remain in the switchgear without being connected to the indicator,
the leads must be applied to suitable insulated terminals ensuring that such leads are short-
circuited.
4.2.
Plug-in housing for panel mount
Insert the plug-in housing into a prepared DIN size cut-out of 92
the switchgear panel and lock it by means of 4 integrated spring clips with self-retaining feature.
Provide a minimum installation depth of 95 mm with connected leads.
If you need to dismount the device, remove the front frame and front plate pushing the retainer
spring clips towards the centre of the device (Order No. of Disassembly Clip: 040401-0008).
4.3.
Installation of current transformers (CTs)
4.3.1.
General
•
The CTs are split-core types (allow also for subsequent mounting) and are mounted on insu-
lated conductors.
•
Ensure shielding of each conductor is repassed through the yoke of the CT to compensate
any shield currents (see illustration 18). On connecting the wires to the ComPass B mind
the allocation of the cable lead colours (brown/blue) to the terminals (marking br/bl) and the
respective L1, L2, L3 phases.
Make sure current transformers are mounted only on fully insulated i. e. touch-safe conduc-
tors.
12
Dipl.-Ing. H. Horstmann GmbH
mm x 45
mm on the front of
+0.8
+0.6
ComPass B 4023841-001
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