AUTOMATION 2000 DGPT2 Series Owner's manual

TECH. INSTRUCTIONS
Page N° T/NOT-0021 Date: 28/09/16 Rev.
7
DGPT2®1
TECHNICAL INSTRUCTIONS
DGPT2®
AUTOMATI ON 2000
20 rue de la pommera i e, 783 1 0 C o i g nières —FRANC E
Tel : + 33 -1-3461-4232 —Fax: [phone]
info @aut o matio n 2000.co m —w w w. a ut o ma t io n2 0 0 0. c om

1–INSTALLATION (COMPLETELY FILLED HERMETIC
TRANSFORMERS)
1.1 Preamble
The following installation procedure is given for information only. Automation 2000
cannot be held responsible for its execution.
1.2 Installation precautions
Before installing the DGPT2®, make sure that:
 The transformer is not powered.
 The transformer dielectric is at ambient temperature (approx. 20°C).
 The dielectric level inside the transformer is slightly below the transformer
tank cover.
 The transformer opening on which the DGPT2®will be installed is opened.
1.3 Installation procedure
 Remove the drain tap and the level indicator float.
 Fit the FPM seal (supplied) in the DGPT2®attachment flange throat.
 Mount the DGPT2®on the transformer opening designed for that purpose.
 Attach the fixing hooks (supplied) on the fixing bolts (3 at 120° or
4 at 90°) according to the tightening precautions (see page 4). The fixing bolts
must be located on a circle with a 97 mm diameter (±2 mm).
 Fill the DGPT2®with transformer dielectric until its level reaches the DGPT2®
highest point.
 Put back the level indicator float into place and close the DGPT2®with its
drain tap.
Fixing hook
Drain tap
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Level indicator
float
TECH. INSTRUCTIONS
Page N° T/NOT-0021 Date: 28/09/16 Rev.
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DGPT2®2

2–INSTALLATION (BREATHING TRANSFORMERS WITH
CONSERVATOR)
2.1 Preamble
The following installation procedure is given for information only. Automation 2000
cannot be held responsible for its execution.
2.2 Installation precautions
Before installing the DGPT2-IB, make sure that:
 The transformer is not powered.
 The transformer dielectric is at ambient temperature (approx. 20°C).
 The transformer conservator is empty.
 The dielectric level inside the transformer is slightly below the transformer
tank cover.
 The transformer opening on which the DGPT2-IB will be installed is opened.
2.3 Installation procedure
 Fit the FPM seal (supplied) in the DGPT2-IB attachment flange throat.
 Mount the DGPT2-IB on the transformer opening designed for that purpose.
 Attach the fixing hooks (supplied) on the fixing bolts (3 at 120° or
4 at 90°) according to the tightening precautions (see page 4). The fixing bolts
must be located on a circle with a 97 mm diameter (±2 mm).
 Connect the DGPT2-IB to the conservator through its IB insert with a flexible
tube equipped with both a 3/8” female threaded end and a rotary fitting.
 Fill the conservator up to its normal level.
 Slowly open the DGPT2-IB sampling tap until the transformer dielectric level
reaches the DGPT2-IB highest point and close it.
Fixing
hook Flexible tube
IB insert
Sampling tap
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TECH. INSTRUCTIONS
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DGPT2®3

TIGHTENING PRECAUTIONS
When you tighten the HM8 bolts on the DGPT2®fixing hooks, make sure that:
 The tighten coupling is not higher than 3 m.kg (30 N.m).
 The DGPT2®attachment flange DOES NOT TOUCH the transformer cover
(the FPM seal should stay visible –approx. 1 or 2 mm).
 The DGPT2®fixing hooks are tightened one after the other, clockwise in two
steps. During the first step, use a loose tighten coupling on all fixing hooks.
During the second step, use a tighten coupling not higher than 3 m.kg
(30 N.m).
LEAKPROOFNESS PRECAUTIONS
The DGPT2®drain tap’s leakproofness is insured by a FPM seal positioned at the root of
the screw thread undercut.
 NEVER USE Teflon®tape (or similar tape) to insure the DGPT2®drain tap’s
leakproofness through its screw thread.
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DGPT2®4

3–ELECTRICAL OPERATION
3.1 Preamble
All DGPT2®monitoring functions come with change-over contacts (a Normally
Opened contact, a Normally Closed contact and a Common point).
3.2 Operating diagram
3.2.1 Gas discharge
Gas discharge is usually due to an electrical defect in the transformer active part,
creating an electrical arc not strong enough to cause an instantaneous pressure
increase.
G2 G1
(as an option)
When the gas volume inside the gas accumulation tank reaches a certain value
(depending on the dielectric density), the Reed contact changes position.
Dielectric density < 1 Volume < 140 cm3
Dielectric density = 1 Volume = 140 cm3(±5 cm3)
Dielectric density > 1 Volume > 140 cm3
Reed
Gas accumulation tank
Triggering float
In the following diagrams, the contacts are shown unpowered
(dead), meaning not under the influence of any defect for
their respective monitoring functions.
NORMAL LEVEL
Reed contact(s)
Indicator float
Terminal
block
NO
C
3’ 2’ 1’
NC NO
C
3 2 1
NC
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TECH. INSTRUCTIONS
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DGPT2®5

Pressure switch
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.
P2 P1
(as an option)
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.
T2 T1
When the dielectric temperature reaches the set-point value (±2.5°C), the
thermostat’s contact changes position.
T1 setting
system
NORMAL TEMPERATURE
Thermostats’ contacts
Terminal
block
NO
C
12
NC NO
C
9 8 7
NC
11 10
Setting system
NORMAL PRESSURE
Pressure switch’s contact(s)
Terminal
block
NO
C
6’ 5’ 4’
NC NO
C
6 5 4
NC
T2 setting
system
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DGPT2®6

4–TESTS
4.1 Precautions
Before carrying out the tests, make sure:
 That the transformer is not powered.
 To carefully check the wiring system.
 That the electric interlocking system is powered so that the loops can be tested
up to the final element (e.g. LED for alarm function, actuators
for trigger function).
4.2 Gas discharge
Element concerned: Reed contact
Moving a magnet (minimum Ø 22 mm, thickness
10 mm) under the Reed housing (or on the side) will
change the contact’s position.
Check that the loop is operating correctly.
4.3 Excessive pressure
Element concerned: Pressure switch type 1
Press the test button located on the left side of the
pressure switch.
The contact changes position.
Check that the loop is operating correctly,
then release the test button.
Element concerned: Pressure switch type 2
Turn the setting knob clockwise to bring the
set-point to zero.
The contact changes position.
Check that the loop is operating correctly, then reset
the set-point at the value indicated on the yellow
identification plate.
4.4 Temperature
Elements concerned: T1 and T2 thermostats
Turn the setting knob below its 40°C graduation.
The contact changes position.
Check that the loop is operating correctly, then reset
the set-point at the value indicated on the yellow
identification plate.
Test
button
Reed
housing
Magnet
Setting
knob
Setting
knobs
TYPE 2
TYPE 1
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Page N° T/NOT-0021 Date: 28/09/16 Rev.
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DGPT2®7

5–CLEANING PRECAUTIONS
5.1 Basic precautions
DGPT2®plastic body is made of a transparent polyamide specifically treated against
ultraviolet with an improved outdoor weathering behaviour.
When the DGPT2®plastic body needs to be cleaned, always make sure that the
composition of the cleaning product (or leak detection product) does not contain
any chemical listed on page 9. Diesel fuel and kerosene are excellent cleaning
agents.
If you use a cleaning product containing one of these chemicals, cracks caused by
the stress release inside the polyamide will appear on the DGPT2®plastic body.
These stress-cracks will cause leaks and make the DGPT2®inoperative until its
plastic body has been replaced.
5.2 Loss of transparency
In contaminated atmosphere, successive layers of deposit can alter the DGPT2®
plastic body transparency, and even totally occult the visibility of both the dielectric
level and the floats.
In that case, the best way to recover partial visibility is:
 To use a cleaning product containing no chemical listed on page 9.
 To use an ultrafine plastic or painting polishing compound used for car body.
CRACKS
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Page N° T/NOT-0021 Date: 28/09/16 Rev.
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DGPT2®8

5.3 Chemical and solvent prohibited with the DGPT2®plastic body
A
Acetone
Acrylonitrile
Allyl alcohol
Ammonium sulfide, 40%
Amyl alcohol
Aniline
B
Benzaldehyde
Benzoic acid*
Bromine, liquid
1,3-butanediol
1,4-butanediol
2,3-butanediol
n-butyl alcohol
t-butyl alcohol
Butylene glycol
C
Chloroform
Chlorosulfuric acid
Crotonaldehyde
Cyclohexane
D
1,2-dichloroethane
1,2-dichloroethylene
Difluoromonochloromethane
Dimethylformamide
1,4-dioxane
E
Ethyl alcohol
Ethylamine, 33%
Ethylene diamine
Ethylene glycol
F
Fluorodichloromethane
Formic acid, concentrated
Furfuralcohol
G
Gasoline (5% methanol)
Glacial acetic acid
H
Hydrazine hydrate, 80%
Hydrochloric acid, concentrated
I
Isoamyl alcohol
Isopropanol
M
Methylene chloride
Methyl ethyl ketone
N
Nitric acid, 2%
Nitric acid, 10%
Nitric acid, 30%
P
Potassium chlorate*
n-propanol
Propylene glycol
S
Sulfuric acid, concentrated
T
Tartaric acid*
* Saturated solution in water at 23°C
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Page N° T/NOT-0021 Date: 28/09/16 Rev.
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DGPT2®9

6–TECHNICAL DATA
6.1 Metal housing
- Housing and cover in AISI 304 with 2 screws that can be sealed by lead
Ratings: IP56, IK07
- Wiring output through M25 cable gland with anchor (two positions possible)
Tighten capacity: 13-18 mm
- Wiring through terminal block with a 6 pitch
Tighten capacity: 4 mm² (12 or 18 terminals)
- 5 mm diameter earthing screw inside the housing
- 6 mm diameter earthing screw at the outside base of the housing
- Insulation: 500 VDC, 20 MΩbetween terminals and earth
- Dielectric rigidity: 2,000 VAC, 1 minute between terminals and earth
- Fire hazard: the stuffing glands, terminal blocks, wires, etc. are made of
self-extinguishing halogen free material. The housing contains fire.
6.2 Plastic body
- Plastic body in polyamide with ultraviolet stabilizer
Ratings: IP56, IK07
- Gas volume graduations in cm3(10-160 cm3)
6.3 Reed contact
- 1 Reed contact (2 Reed contacts as an option)
- Change-over contacts
- Measure accuracy: ±5 cm3
6.4 Pressure switch
- Metallic bellows with adjustable counterspring pressure switch with
1 microcontact (2 microcontacts as an option)
- Change-over contacts
- Adjustable set-point that can be sealed by lead
- Setting scale: 0–500 mbar (0-700 mbar on request)
- Setting accuracy: ±10 mbar
- Measure accuracy: ±5 mbar
- Response time: < 5 milliseconds
6.5 Thermostats
- 2 adjustable independent fluid expansion thermostats
- Ambient temperature compensation
- Change-over contacts
- Setting scale: 40–140°C
- Setting accuracy: ±2.5°C
- Measure accuracy: ±3°C at 60°C, ±1.5°C at 90°C
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DGPT2®10

6.6 Thermometer
- 1 fluid expansion thermometer with tracking pointer access that can be sealed
by lead
Indicator diameter: 50 mm
- Ambient temperature compensation
- Tracking pointer indicating maximum temperature reached
- Display scale: 40–150°C
- Reading accuracy: ±1°C
- Measure accuracy: ±4°C at 60°C, ±1.5°C at 90°C
6.7 Fitting
- Fitting at the base of the housing through a flange in composite with a thermowell
to be installed on a 60 mm diameter opening (FPM seal and fixing hooks supplied).
Flange diameter: 85 mm
Thermowell: 104 mm (length), 27-24 mm (diameter from top to bottom end)
- The flange and the thermowell do not conduct electricity.
6.8 Operating conditions
- Ambient temperature: –40°C to 65°C
- Dielectric temperature: ≤ 140°C
6.9 Breaking capacity
6.10 Standard compliance
The DGPT2®conforms to the following Standards:
 IEC EN 50216-1
 IEC EN 50216-3
 IEC EN 60529
 NF EN 60439-1
 NF EN 60950
 NF C17-300
 NF C52-107
RESISTIVE LOAD - L/R < 40 ms
Function 24 VDC 48 VDC 110 VDC 220 VDC
250 VAC
50/60 Hz
Cos φ 0.5
Gas discharge 1 A 1 A 0.5 A 0.25 A 1 A
Excessive pressure 2 A 3 A 0.5 A 0.25 A 5 A
Temperature 4 A 4 A 1 A 0.5 A 8 A
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Page N° T/NOT-0021 Date: 28/09/16 Rev.
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DGPT2®11

7–SPATIAL REQUIREMENT
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6597
231
42
104
24
ø 85
297
58
207
54
148
3
52
Flange axis
66 20
93
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DGPT2®12

8–OPTIONS
2G: 2 synchronous gas contacts
The DGPT2®is equipped with two Reed contacts, whose triggering thresholds are
identical.
The Reed contacts’ characteristics are identical to the Reed contact equipping the
Standard DGPT2®.
Conforming to IEC EN 50216:3 Standard, the Reed contacts change position when
the gas inside the transparent body reaches a volume between 100 and 200 cm3.
2GD: 2 gas contacts with an offset
The DGPT2®is equipped with two Reed contacts, whose triggering thresholds are
offset by 40 cm3approximately.
Conforming to IEC EN 50216:3 Standard, the Reed contacts change position when
the gas inside the transparent body reaches a volume between 100 and 200 cm3.
2P: 2 synchronous pressure contacts
The DGPT2®is equipped with a pressure switch
with 2 microcontacts, whose triggering thresholds
are identical.
The triggering threshold is defined by the
customer.
2PD: 2 pressure contacts with an offset
The DGPT2®is equipped with a pressure switch
with 2 microcontacts, whose triggering thresholds
are offset.
Defined at the time of the order, this offset (10 to
100 mbar) cannot be modified by the customer
afterwards.
The value indicated on the pressure switch’s setting
system is the lowest triggering threshold (P1).
CE: industrial connector
The DGPT2®is equipped with a Harting connector
on the cover enabling the user to connect or
disconnect the wiring system while the metal
housing remains closed.
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DGPT2®13

FA: thermometer visible on the cover side
The graduated dial of the thermometer is visible on
the cover side of the metal housing.
HT: high temperature body and flange
The DGPT2®is equipped with a transparent body,
a flange and a thermowell that can withstand a
dielectric temperature up to 170°C.
IB: connection for conservator
The flange of this DGPT2®is equipped with two
3/8” male inserts for conservator connection (or
connection to any other accessories).
PA: marine cable gland
The DGPT2®is equipped with a marine cable gland
insuring the cable anchorage, the continuity of
armour and the water tightness of both the internal
and external cable coating from the connecting
cable.
PT: Pt100 sensor
The DGPT2®is equipped with a Pt100 sensor
(100 Ω at 0°C and 138.5 Ω at 100°C) located in the
thermowell. It is connected to an independent
terminal block with 3 or 4 wires depending on the
customer’s needs.
PTC: 80°C PTC thermistor
The DGPT2®is equipped with a 80°C Positive
Temperature Coefficient thermistor located in the
thermowell. It is connected to an independent
terminal block with 2 wires.
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DGPT2®14

SO: drain tap with popoff relief valve
The drain tap equipping the DGPT2®includes a
popoff relief valve.
Its calibration is defined by the customer and
adjusted by Automation 2000.
X: industrial and marine atmosphere
The DGPT2®is equipped with a metal housing and cover made of AISI 316L
stainless steel, a drain tap made of brass with chemical nickel coating, and fixing
hooks made of AISI 316L stainless steel. The DGPT2®equipped with this option is
IP67 classified.
9–ACCESSORIES AND SPARE PARTS
1 Reed contact
Spare part for Standard DGPT2®.
2 synchronous Reed contacts
Spare part for DGPT2®with option 2G.
2 Reed contacts with an offset
Spare part for DGPT2®with option 2GD.
3/8” flexible tube for conservator fitting
This accessory consists of a corrugated hose made
of AISI 316L stainless steel with a braiding made of
AISI 304L stainless steel.
Its standard version is equipped with a 3/8” female
threaded end and a rotary fitting made of
AISI 316L stainless steel on both extremities.
The flexible tube’s length is defined at the time of
the order.
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DGPT2®15

Antimagnetic shield
This accessory has been designed to prevent
spurious releases of the DGPT2®’s Reed contact in
highly magnetic environments.
Made of AISI 430 ferromagnetic stainless steel, it is
supplied with its fixing screw.
Drain tap
Spare part made of nickel plated brass.
Drain tap with popoff relief valve
Spare part made of nickel plated brass.
Its calibration is defined by the customer and
adjusted by Automation 2000.
Fixing hooks
Spare parts made of steel or AISI 316L stainless
steel.
Flat seal for drain tap
Spare part made of FPM for drain tap with or with-
out popoff relief valve.
Flat seal for flange
Spare part made of FPM.
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DGPT2®16