True blue power TI250 Series Documento tecnico
Revision J • May 4, 2020
1 Manual Number 9018067 • Revision J, May 4, 2020
FOREWORD
This manual provides information intended for use by persons who, in accordance with current
regulatory requirements, are qualified to install this equipment. If further information is required,
please contact:
True Blue Power
c/o Mid-Continent Instrument Co., Inc.
Attn: Customer Service Dept.
9400 E. 34th St. N.
Wichita, KS 67226 USA
Phone 316-630-0101
Fax 316-630-0723
www.truebluepowerusa.com
www.mcico.com
We welcome your comments concerning this manual. Although every effort has been made to
keep it free of errors, some may occur. When reporting a specific problem, please describe it
briefly and include the manual part number, the paragraph/figure/table number and the page
number. Send your comments to:
True Blue Power
c/o Mid-Continent Instrument Co., Inc.
Attn: Technical Publications
9400 E. 34
th
St. N.
Wichita, KS 67226 USA
Phone 316-630-0101
Fax 316-630-0723
© Copyright 2017
Mid-Continent Instrument Co., Inc.
Download the current
version of this
installation manual
using your
smartphone or tablet.
2 Manual Number 9018067 • Revision J, May 4, 2020
TABLE OF CONTENTS
SECTION 1GENERAL DESCRIPTION 4
1.1INTRODUCTION 4
1.2TECHNICAL SPECIFICATIONS 5
SECTION 2PRE-INSTALLATION CONSIDERATIONS 6
2.1COOLING 6
2.2EQUIPMENT LOCATION 6
2.3ROUTING OF CABLES 6
2.4LIMITATIONS 6
2.5MODIFICATION 7
SECTION 3INSTALLATION 8
3.1GENERAL INFORAMATION 8
3.2UNPACKING AND INSPECTING EQUIPMENT 8
3.3CABLE HARNESS 8
3.4MOUNTING 13
3.5INSTALLATION COMPLETION 13
3.6INSTALLATION CAUTION 14
SECTION 4OPERATION 15
4.1ELECTRICAL PERFORMANCE 15
4.2PROTECTIVE FEATURES 15
SECTION 5CONFORMANCE 17
5.1INSTRUCTIONS FOR CONTINUED AIRWORTHINESS 17
5.2ENVIRONMENTAL QUALIFICATION STATEMENT 17
3 Manual Number 9018067 • Revision J, May 4, 2020
REVISION HISTORY
Rev Date Detail Approved
A 12/10/2013 Initial release BAW
B 02/11/2014 Revised Technical Specifications BMC
C 05/27/2014 Revised Section 3.3.1, Wire Gauge Selection BMC
D 01/02/2015 Added TI254 and TI256 models BMC
E 05/11/2015 Added -4 Configuration BMC
F 06/16/2015 Updated -4 Configuration specifications BMC
G 01/06/2017 Update connector Pinout Table to agree with the input
voltage in the Specification Table. CAS
H 07/26/2019 Updated altitude in Table 1.3 and Qualification sheet. VAA
J 05/04/2020 Updated style and brand to meet Marketing and
Engineering guidelines. DLR
4 Manual Number 9018067 • Revision J, May 4, 2020
SECTION 1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The model TI250 Series Static Electrical Power Inverter is a lightweight power inverter that
translates a 20 to 36 VDC input to three various output options:
Model Part Number Output
TI250 6430250-1 115 VAC, 60 Hertz
TI254 6430250-2 115 VAC, 400 Hertz
TI256 6430250-3 115/26 VAC, 400 Hertz
TI256 6430250-4 115/26 VAC, 400 Hertz with sync capability
All three configurations provide 250 watts (VA) of power. The alternating current output is defined
as a pure sine wave with less than 2% of total harmonic distortion for clean, noise-free, harmonic-
free power to supply loads of corresponding voltage, power and frequency. For the TI250, the
115VAC, 60 Hertz (Hz) is suitable for nearly any common commercial or consumer load rated for a
nominal input of 110-120VAC. The TI254 and TI256 are designed for 115VAC outputs with an AC
frequency of 400 Hz for common avionics and related equipment, with the TI256 also providing an
additional independent 26VAC output and optional dual-unit synchronization. The TI250 Series
Static Inverter is FAA certified to TSO C73 and tested to rigorous environmental standards and
levels of RTCA DO-160. The small size and light weight in conjunction with its installation flexibility
(inside or outside the pressure vessel) make it an ideal choice for aircraft power needs while
reducing the challenges associated with other similar products.
Highlighted features include short circuit protection, overload capability, low voltage shut-down,
temperature monitoring, a self-resettable over-temperature disable, a remote on/off function, and a
fault indication output. The TI250 Series has the same connector of legacy designs plus ground
fault interrupter protection. The rugged extrusion that houses the unit is designed to help dissipate
heat and provide mechanical strength against vibration or other possibilities of damage. The TI250
Series is engineered to run cooler and requires no active cooling, featuring a fanless design, which
saves energy, reduces weight and allows flexible installation locations. At only 2.5 pounds or less,
it is lighter and smaller than competing inverters. Additionally, the primary stage of the TI250
Series utilizes current mode control for increased reliability and safety.
5 Manual Number 9018067 • Revision J, May 4, 2020
1.2 TECHNICAL SPECIFICATIONS
Electrical Attributes
Model
TI250
Model
TI254 Model TI256 Model TI256
Input Voltage 28VDC nominal; 20-36VDC 18-36VDC
Input Current (full load) 10 amps nominal; 15 amps max 20A max
Input Current (no load) 150 milliamps
Input Current (ON/OFF = OFF) 50 milliamps
Recommended Circuit Breaker 15 amps
Output Voltage
115VAC
±3% at 60
Hertz ±0.1%
115VAC
±3% at 400
Hertz ±0.1%
115/26VAC
±3% at 400
Hertz ±0.1%
115/26VAC
±3% at 400
Hertz ±0.1%
Output Power 250 watts (250 VA at power factor = 1)
Output Waveform Single phase, pure sine wave
Power Factor -0.8 to +0.8
Efficiency 87 – 90% nominal
Total Harmonic Distortion
(THD) Less than 2%
Table 1.1
Physical Attributes
Model TI250 Model TI254 Model TI256 Model TI256
Weight: 2.2 lbs
(1 kg)
2.2 lbs
(1 kg)
2.6 lbs
(1.15 kg)
2.6 lbs
(1.15 kg)
Dimensions:
(not including connector mate)
6.7 inches long x 6.0 inches wide x 2.0 inches high
(171 mm long x 152 mm wide x 51 mm high)
Mating Connector (and cable
clamp): MS3106A-18-9S (MCI P/N 9016905-1, -2)
Mounting: Base mount – orientation not critical
Table 1.2
Qualifications
Model TI250 Model TI254 Model TI256 Model TI256
Certification: FAA TSO-C73
Environmental Qualification: RTCA DO-160G Environmental Category; See Section 5.2
Altitude: -15,000 feet to +70,000 feet
Temperature: -55°C to +70°C (-67°F to +158°F)
Table 1.3
6 Manual Number 9018067 • Revision J, May 4, 2020
SECTION 2 PRE-INSTALLATION CONSIDERATIONS
2.1 COOLING
The TI250 Series does not require external cooling or contain internal active cooling. Cooling of the
unit occurs exclusively through passive conduction through the base or radiated cooling across the
metal case. Additional cooling can be realized through convective effects of the environment
(exposure to free moving air). These methods are not required to achieve rated performance but
can help prevent potential overheating and extend life when the unit is operated at full power or
during overload conditions. Specifically, mounting the unit to a metal surface is preferred, but not
required.
2.2 EQUIPMENT LOCATION
The TI250 Series is designed for mounting flexibility, allowing for installation inside or outside the
pressure vessel with no requirement for temperature control. In addition to altitude and
temperature resistance, the unit is also designed to withstand high levels of condensing humidity.
However, installation locations where the unit could be subject to standing or direct water exposure
should be avoided. The unit can be mounted in any orientation. Clearance should be provided for
the mating connector and may require as much as five inches past the unit connector to allow for
back shell access to the connector.
2.3 ROUTING OF CABLES
The wires and cable bundle associated with the unit are heavy gauge wire and carry significant
power. Be aware of routing cables near other electronics or with other wire bundles that may be
susceptible to high energy flow.
Avoid sharp bends in cabling and routing near aircraft control cables. Also avoid proximity and
contact with aircraft structures, avionics equipment, or other obstructions that could chafe wires
during flight and cause undesirable effects.
2.4 LIMITATIONS
The TI250 Series of static electric power inverters is certified to FAA TSO-C73 with the following
limitations identified:
1) Alternating current (AC) output is provided at 115 volts and 60 hertz in lieu of 115 volts and
400 hertz as identified in the MPS of the TSO.
2) Equivalent environmental qualification was verified per RTCA DO-160G in lieu of those
identified within the MPS of the TSO.
The conditions and tests for TSO approval of this article are minimum performance standards.
Those installing this article, on or in a specific type or class of aircraft, must determine that the
aircraft installation conditions are within the TSO standards, specification of the article, and
deviations as listed above. TSO articles must have separate approval for installation in an aircraft.
The article may be installed only according to 14 CFR part 43 or the applicable airworthiness
requirements.
7 Manual Number 9018067 • Revision J, May 4, 2020
2.5 MODIFICATION
This product has a nameplate that identifies the manufacturer, part number, description,
certification(s) and technical specifications of the unit. It also includes the “MOD” or modification
number representing notable changes in the hardware design of the unit.
Modification (MOD) 0 is the initial release of the product and is identified on the nameplate by the
lack of marking on the MOD numbers 1 through 9 (i.e. 1-9 are visible). All subsequent
modifications are identified on the nameplate by the marking/blacking out of that particular MOD
number (i.e. for MOD 1, the number 1 is not visible and 2-9 are visible - see Figure 2.1 for
examples). MODs do not have to be sequentially inclusive and may be applied independent of
each other.
For additional details regarding specific changes associated with each MOD status refer to the
product published Service Bulletins at www.truebluepowerusa.com.
Figure 2.1
Nameplate and MOD Status Example
MOD 0
MOD 1
MOD 1
& MOD 2
8 Manual Number 9018067 • Revision J, May 4, 2020
SECTION 3 INSTALLATION
3.1 GENERAL INFORAMATION
This section contains interconnect diagrams, mounting dimensions and other information
pertaining to the installation of the TI250 Series Static Inverter. After installation of cabling and
before installation of the equipment, ensure that power is applied only to the pins specified in the
interconnect diagram.
3.2 UNPACKING AND INSPECTING EQUIPMENT
When unpacking this equipment, make a visual inspection for evidence of any damage that may
have incurred during shipment. The following parts should be included:
A. Static Inverter MCI P/N 6430250-( )
B. Mating Connector (& cable clamp) MCI P/N 9016905-1 and 9016905-2
C. Installation Manual MCI P/N 9018067
Equipment not provided:
A. Mounting Hardware four (4) 10-24 pan head screws
¼” lock washers (optional)
B. Cable Harness Wire See Section 3.3 for specifications
3.3 CABLE HARNESS
Construct the cable harness with regards to the instructions below, and using the Connector Pinout
of Figure 3.3, Figure 3.4, and Wiring Diagram of Table 3.3.
Refer to Section 2: Pre-Installation Considerations in regards to routing precautions.
Wire Gauge Selection
Use of PTFE, ETFE, TFE, Teflon, or tefzel insulated wire is recommended for aircraft use.
Use the following wire gauges for each of the pins in the connector:
Pin A and D – 12-14 AWG stranded or solid
Pin B and C – 18-20 AWG stranded or solid
Pin E and F – 18-24 AWG stranded or solid
Suggestion: If the TI250 is installed in an application where the pin-compatible 500 Watt
MD50 inverter may be later used; the larger wire gauge sizes of the MD50 can be used.
Pin Assignment Information
INVERTER INPUT POWER:
Positive DC input – +24 to 32 VDC. Connect to the aircraft 28 VDC bus using a 15 Amp
circuit breaker.
Negative DC input – Connect to aircraft ground.
Note: Two common practices for the connecting the -28V of power devices in aircraft are:
The negative lead connects from the device to the negative power bus.
The negative lead connects from the device to the negative power bus, and a second lead
connects to the aircraft structure close to the power device.
The TI250 Series passes DO160G Section 21 Table 1.2.3 conducted emissions testing
using both methods.
9 Manual Number 9018067 • Revision J, May 4, 2020
INVERTER AC OUPUT:
AC Return – Used for powering devices where terrestrial/utility power designations are
used, pin C can be connected as “Neutral”.
AC Output – Used for powering devices where terrestrial/utility power designations are
used, pin B can be connected as “Line” or “Hot”.
Note: Use of a circuit breaker on the AC output is optional. For the full output of 250VA, a
2.5 Amp circuit breaker is sufficient. For convenience at each AC outlet, individual circuit
breakers of 1 to 3 amps each can be used. If a single pole breaker is used, install the
breaker on the wire from pin B. If a double pole breaker is installed, route both pins B and C
through the circuit breaker.
INVERTER REMOTE ON/OFF CONTROL: (see section 4.2.1)
Remote ON/OFF Control – Connecting this pin to either DC Negative or to aircraft ground
will enable the AC output of the inverter. By utilizing a switch between this pin and ground
or negative, it will allow remote on/off control of the unit. When unconnected (output is
OFF) this pin will have approximately 16 VDC present, internally limited to less than 3 mA.
If the inverter is to be enabled at all times, pin E can be connected to pin G.
Remote ON/OFF Return – This pin is internally connected to pin D. Pin G may be used
as the return from an ON/OFF switch or left unconnected. It is recommended that pin G not
be connected directly to ground or 28V negative.
INVERTER FAULT INDICATION OUTPUT:
Fault Indication Output (-1/2/3 only) – This pin can be connected to an external LED or
status monitoring device to indicate the operating status of the inverter. The inverter will
provide Fault indication when: Power Output capability has been exceeded, the output has
been short-circuited, the output is ground-faulted (GFI protection activated), or the inverter
has shut-down in over-temperature protection. The output is an open-collector transistor
with a weak pull-up to 28V (21K ohm) capable of sinking 100 mA.
Phase Sync (-4 only) – Two TI256 units may be synchronized by connecting these pins
together on each unit. This configuration will ensure the 115 VAC (and 26 VAC) outputs on
each unit are phase locked within 5°.
Note: The AC outputs are not designed to be connected in parallel with other units
regardless of the optional phase sync function.
Altri manuali per TI250 Series
2
Questo manuale è adatto per i seguenti modelli
7
Indice
Altri manuali True blue power Invertitore
