Advanced Power technologies ECLIPSE User guide

Page 1 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
Application Guide-AG010
Title: ECLIPSE DFWT Install and Application Guide
Model: ECLIPSE &
TOTAL ECLIPSE
Written By: T. Williams & J. Mundackal
Date:
04/27/2020
Rev. C
Application Summary
The ECLIPSE is capable of providing Direct Fiber Winding Temperature using
enhanced Rare-Earth tipped probes that utilize blue LED technology or using
legacy phosphor tipped probes using red LED technology. The ECLIPSE with
DFWT may be applied on new transformers and can be used to replace legacy
fiber probe Monitors using red LED legacy phosphor fiber optic probes.
This application guide will discuss in detail:
•Theory of Operation
•New Transformer Application
•Retrofit Application
•Fiber Removal
•ECLIPSE Programming
•Testing
Contents
Table of Contents
1 DFWT Specifications
2 Theory of Operation
3 New Transformer Application
3.1 Required Accessories
3.1.1 Fiber Probes
3.1.2 Fiber Extension
3.1.3 Flange Plate
3.2 Optional Accessories
3.2.1 Flange Housing
3.3 Fiber Installation

Page 2 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
3.3.1 Handling of the Probe
3.3.2 Routing of Fiber
3.3.3 Key Spacer Insert Fabrication
3.3.4 Probe Placement
3.3.5 Routing the probes out of the winding
3.3.6 Routing probes to the flange plate optical couplers
3.3.7 Connector cleaning procedure
3.3.8 Flange Plate
3.3.9 Fiber Extensions
4 Retrofit Application
4.1 Required Equipment
4.2 Installation
5 Fiber Removal
6 ECLIPSE Programming
6.1 Configuration Settings
6.2 Set Point Settings
6.3 Naming Settings
7 Testing

Page 3 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
1 DFWT Specifications
➢Enclosure & Dimensions: 8.028 W x 4.882 H x 6.40 D Alodine
Aluminum
➢Front Panel Dimensions: 8.378 W x 5.686 H
➢Power Supply Input Operating Range: 38 VDC to 290 VDC or 120
VAC +/- 10% with Surge Protection Device, 10 Watts max.
➢Operating Temperature Range: -50 °C to +85 °C, 95% Relative
Humidity (non-condensing)
➢Temperature Measurement Accuracy: ± 2 °C Full Scale
➢Temperature Measurement Range: - 40 to 200 °C
➢Communications Interfaces: Front Panel Mounted RS-232 DB-9
Null Modem interface
Ethernet: 10/100 Base-T metallic interface with transformer
isolation of 1,500 Volts AC RMS in accordance with IEEE/ANSI
802.3
➢Surge Withstand/Fast Transient: Relay outputs and station battery
inputs: ANSI C37.90.1
➢Electrostatic Discharge: IEC 801-2
2 Theory of Operation
Direct Fiber Winding Temperature uses either fluorescing tipped or
Gallium Arsenide (GaAs) tipped fiber optic probes inserted directly into the
winding of the transformer. Advanced Power Technologies provides
superior Rare-Earth tipped probes, which are produced by dipping the tip
of the glass fiber into a slurry of fluorescing Rare-Earth material and then
firing it to bond the slurry to the glass fiber. While GaAs technology was
thought to be an improvement in cost over phosphor, it may actually
create a serious long-term issue caused by very high electric stresses at
voltages equal to and above 230 kV that may cause partial discharge (PD)
should there be voids at the interface between the glass fiber and GaAs
chip. Rare-Earth tipped probes can withstand electric stresses at voltages
in excess of 765 kV because the firing process produces a product that
has no voids between the Rare-Earth coating and the fiber. Therefore,
Rare-Earth tipped probes are preferred because of the risk should PD
develop and the cellulose insulation in the vicinity of the fiber probe is
compromised.
The ECLIPSE provides a pulse of light that excites the Rare-Earth
material coating where the decay rate is a function of temperature. The
ECLIPSE uses the decay rate to determine the temperature within ± 2 C

Page 4 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
using Advanced Power Technologies’enhanced blue LED phosphor
technology.
DFWT allows for the direct measurement of the winding hot spot
temperature rather than traditional methods such as simulated winding hot
spot temperature using a heated thermowell or calculated winding
temperature. The advantages of the DFWT include: faster response of
winding hotspot temperature when there is a sudden load change, more
accurate loss of life calculation, real-time dynamic loading, and real-time
cooling system failure detection.
3 New Transformer Application
3.1 Required Accessories
3.1.1 Fiber Probes
The fiber probes for within the tank are available in two
different lengths from stock 4 meters or 10 meters. The part
numbers are 1000252-4 and 1000252-10 respectively.
Figure 3.1 Fiber Probe
3.1.2 Fiber Extensions
The fiber extensions from stock are available in three
different lengths: 5, 10, and 20 meters. Fiber extensions
come four fibers to a set. The relevant part numbers are
1000253-5, 1000253-10, and 1000253-20 respectively.

Page 5 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
Figure 3.2 Fiber Extensions
3.1.3 Flange Plate
The flange plate is 304 stainless and is supplied with a steel
ring that is to be welded on the side of the transformer tank.
Depending on the number of fibers required for installation in
the transformer tank, there are three different flange
configurations available: 4, 8, and 12 fiber probes. The three
assembly part numbers are 1000254-4, 1000254-8, and
1000254-12 respectively.

Page 6 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
Figure 3.3 Flange Plate
3.2 Optional Accessories
3.2.1 Fiber Junction Box
A Fiber Junction Box can be provided by Advanced Power
Technologies. This enclosure provides protection against the
elements for the connections of the fiber extensions on the

Page 7 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
external side of the flange plate. The part number is:
1000255.
Figure 3.4 Fiber Junction Box
3.3. Fiber Installation
3.3.1 Handling of the Probe
- Avoid pulling the probes over sharp bends or corners
- Avoid straining and over-twisting the fiber
- Avoid dropping heavy objects on the probes or dragging
heavy objects over them, as this can crush the probe
fiber
3.3.2 Routing of the Fiber
Secure the probe using cloth or cotton strapping and tie it
only as firmly as necessary when routing the probe inside
the transformer.
NOTE
Do not use nylon cord, as this could overstrain the fiber.
3.3.3 Key Spacer Insert Fabrication
Key spacer inserts can be fabricated by modifying standard
paper spacers.

Page 8 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
Figure 3.5 –Probe in spacer diagram
A 3mm diameter slot should be drilled into a standard spacer
as you can see in Figure 3.4. Be sure not to apply adhesive
near the tip of the probe as this can affect the temperature
readings. Adhesive may not even be necessary; the spiral-
wrapped probe wire fits quite snugly within a 3mm diameter
slot. Please do not apply sharp bends to the probe as it exits
the spacer and/or the winding.
Figure 3.6 –Probe tip inside modified spacer

Page 9 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
Warning:
•Do not apply any adhesive near the tip of the probe
•Do not bend the tip of the fiber probes.
3.3.4 Probe Placement
The sensing part of the fiber optic probe is located at the tip
of the probe about 2 to 3 mm from the probe end. To monitor
the temperature of the windings, the probe tip should be
secured adjacent to the winding’s hottest spot.
Figure 3.7 –Modified spacers with probes installed inside
winding
3.3.5 Routing the probes out of the winding
•When installing the probes it is advisable to coil unused
portions in loops no smaller than 30 cm in diameter
•It is also preferable not to have the connector swinging
freely during dry out and assembly
•The coil and connector can be attached with a cotton
strapping on string.
•A good trick is to use a spool (cardboard or wood) to
keep the uninstalled fiber portion well organized.
Note: The dust cap (installed on the probe connector
end) should be left on the connector during the all the
installation process, until the connector is connected to
the optical coupler (feedthrough). This keeps the dust
and dirt away from the fiber tips. The dust caps for the
probes are made of Teflon, so they should be left on
the probes even during the heat runs, until the probes
are connected to their optical couplers.

Page 10 of 21
AG010 ECLIPSE DFWT Install and Application Guide Rev 20200427
3.3.6 Routing probes to the flange plate optical couplers
Assuming the probe exits the winding beside the winding leads,
probes can all be run along the tops of the windings to the one wall of
the tank. The routing should be done only after the winding and core
assembly has been installed in the tank, the idea again being to
delay any probe installation steps as much as possible during the
manufacturing process.
Probes can be run through Bakelite tubing or any other stiff tubing or
secured using cotton strapping (do not over-tight) to any supporting
structure. Tubing that is flexible but stiff is dangerous as bending
could cause sharp edges which can damage the probe if it is jerked;
avoid using tubing or jacketing of this sort.
3.3.7 Connector cleaning procedure
Probe and extension connectors need to be cleaned to get the best
signal to the ECLIPSE fiber channels.
•Use optic grade wipes or clean cotton wipes and optical grade
99% isopropyl alcohol.
•Gently wipe the ferrule (specifically its end) in a circular
motion.
•Allow 10 seconds for the alcohol to evaporate.
3.3.8 Flange Plate
Weld the carbon steel ring on to the transformer wall where
the signal of the direct fiber probes will be brought out of the
transformer (location should be below oil level inside the
transformer)
Cut a hole in the transformer wall equal to or less than the
inside diameter of the steel ring.
Assemble the 304 stainless steel flange plate with welded
optical couplers to the steel ring; using the O-ring installed in
the groove and bolts with washers.
Note: The dust caps will be supplied with Flange plate. The
dust caps should be left on all the available ports until the
fiber extensions connected to the ports. In case the
customer leaves the ports open, optical couplers
(feedthrough) may be contaminated with dust, dirt or
moisture. The contamination results in attenuation of the
light transmitted or reflected. Apply clean dry air (Air duster)
to the ports to remove the foreign particles. Do not use
compressed air.