AUTOMATION 2000 DGPT2-IB Technische instructies - Pagina 6
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3.2.2 Excessive pressure
Excessive pressure is usually due to an internal short-circuit, creating an electrical
arc strong enough to indirectly cause an instantaneous pressure increase.
Excessive pressure set-point is always defined by the transformer manufacturer.
Pressure switch
Setting system
When the tank pressure reaches the set-point value (±0.01 bar), the pressure switch's
contact changes position.
3.2.3 Temperature
Temperature elevation is usually due to an electrical defect inside the transformer
tank causing a localized heating, or to an overcharge (an intensive transformer use
above the operating conditions given by the transformer manufacturer).
Temperature set-points are always defined by the transformer manufacturer.
T1 setting
system
T2 setting
system
When the dielectric temperature reaches the set-point value (±2.5°C), the
thermostat's contact changes position.
TECH. INSTRUCTIONS
DGPT2
®
A U T O M A T I O N 2 0 0 0
NO
(as an option)
NO
Page
6
NORMAL PRESSURE
Pressure switch's contact(s)
NC
NO
C
6'
5'
4'
6
P2
NORMAL TEMPERATURE
Thermostats' contacts
NC
NO
C
12
11
10
9
T2
N° T/NOT-0021
NC
C
Terminal
5
4
block
P1
NC
C
Terminal
8
7
block
T1
Rev.
Date: 28/09/16
7