18
T154 protection relays
TECSYSTEM S.r.l ®
PROGRAMMING REHABILITATION IN CASE OF BLOCK (Prg no)
In the event program access is blocked the display will show SET and then display “noP”. To
gain access, press the ENT key and return to normal operation.
Touch the PRG key and then, press and hold the TEST key for approximately 7 seconds
until the flashing PRG screen display ends, and the message nCH is displayed.
NOTE: this procedure removes the lockout feature. To block access again, this feature must
be reprogrammed.
MEASURE SIGNALS TRANSPORT
All the transport cables of the Pt100 measure signals must absolutely:
• be divided from the power ones
• be realized with shielded cable with twisted conductors
• have a section of min 0,5 mm²
• be twisted if you have not any shield
• be firmly fixed in the terminal board
• have tinned or silvered conductors
All the serie “T” units have the sensors linearization with a max error of 0,5% v.f.s..
TECSYSTEM srl has realized a special cable for the measure signal transport with all the pro-
tection requirements in accordance with CEI Normes: mod. CT-ES
NOTE: when the unit is powered the fault relay 7-9 closes and it opens again in case of
fault condition
ELECTRICAL CONNECTION
13 14 15 16 17 18 19 20 21 22 23 24
CH 1 CH 2 CH 3 CH 4
Pt100 SENSORS CONNECTION
40
41
42
POWER SUPPLY
24-240 VAC-VDC
WHITE
RED
RED
Pt100
RELAYS CONNECTION
1 2 3 4 5 6 7 8 9
10 11
ALARM TRIP FAULT FAN
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