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Idiomas disponibles
Idiomas disponibles
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FAULT relay usually results excited during normal working of device (FAULT
STATUS A, TAB 1), in case of failure of probes or feeding absence, the relay
switches off (FAULT STATUS B, TAB 1).
FAN relay is dedicated to the management of the fans of cooling of the transformer
or for the conditioning of the environment where the transformer is installed.
The ALARM and PRE AL relays switch on when the temperature is higher than one
degree of set level.
Each probe type PT100 is gifted with three wires, one of them is white and the other
two are red.
Connect the white wire to the terminal board marked whit sensor logo on plugs (3-
6-9-12-15-18-21-24).
The twenty-four connectors relevant to the eight probes are divided as follows:
Probe N. 1 connectors 1-2-3, Probe N. 2 connectors 4-5-6.
Probe N. 3 connectors 7-8-9, Probe N. 4 connectors 10-11-12.
Probe N. 5 connectors 13-14-15, Probe N. 6 connectors 16-17-18.
Probe N. 7 connectors 19-20-21, Probe N. 8 connectors 22-23-24.
Serial communication interface RS485 full duplex.
• Transmission positive TX+: connector 25.
• Transmission negative TX-: connector 26.
• Receive negative RX-: connector 27.
• Receive positive RX+: connector 28.
All measured signals cables must preferably be:
• Separated from the power cables
• shielded, better if also stranded
• With a section of not less than 0.5 mm
The letters that appear on single digit display assume the following meaning:
F: function mode (range 0-3)
P: pre alarm level, the PrE relay switch on when the temperature exceeds the level
set
A: alarm level, the ALL relay switch on when the temperature exceeds the level set
L: low level for cooling system switch off, the AIr relay switches off when the
2
MESSAGES DESCRIPTION
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ENGLISH
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