True Blue Power TI1200, TI1202, TI1204 Installation Guide

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 [phone]

Fax [phone]

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

Wichita, KS 67226 USA

Phone [phone]

Fax [phone]

© Copyright 2018

Mid-Continent Instrument Co., Inc.

th

St. N.

Download the current
version of this
installation manual
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1 Manual Number 9017680 • Revision J, May 4, 2020

TABLE OF CONTENTS

SECTION 1 GENERAL DESCRIPTION 4

1.1 INTRODUCTION 4

1.2 TECHNICAL

SECTION 2 PRE-INSTALLATION CONSIDERATIONS 6

2.1 COOLING 6

2.2 EQUIPMENT

2.3 ROUTING

2.4 LIMITATIONS 6

2.5 MODIFICATION 7

SECTION 3 INSTALLATION 8

SPECIFICATIONS 5

LOCATION 6

OF CABLES 6

3.1 GENERAL INFORMATION 8

3.2 UNPACKING

3.3 INVERTER

AND INSPECTING EQUIPMENT 8

CONNECTIONS AND WIRE HARNESS 8

3.4 MOUNTING 12

3.5 INSTALLATION

3.6 INSTALLATION

CAUTIONS 12
COMPLETION 12

SECTION 4 OPERATION 14

4.1 ELECTRICAL PERFORMANCE 14

4.2 PROTECTIVE

FEATURES 15

SECTION 5 CONFORMANCE 18

5.1 CONTINUED AIRWORTHINESS STATEMENT 18

5.2 ENVIRONMENTAL

QUALIFICATION STATEMENT 18

2 Manual Number 9017680 • Revision J, May 4, 2020

REVISION HISTORY

Rev Date Detail Approved

A 04/27/2012 Initial release. JRC

B 07/23/2012

Page 9; view overlaps. Page 15 (TS) and (TDS) 501 was

500.

JDS

C 01/02/2015 Added TI1202 model. BMC
D 08/08/2016 Added 6431200-5 model. VAA
E 12/30/2016 Added the -2, -4, and -5 models to Table 1.1. KJW

F 02/27/2017

General update to entire manual.
Added 6431200-6 model. Add capacitor/noise section.

JRC

Added additional DO-160G section category ratings to

G 07/17/2019

Table 5.2. Added 6431200-7 with different connector in

JRC

Table 1.1 and Table 3.3.1. Updated Figure 4.2

H 08/13/2019 Updated Section 4.2.1, Table 1.1 and 1.2, and Figure 4.2. VAA

Updated style and brand to meet Marketing and

J 05/04/2020

Engineering guidelines. Updated 5.2 EQF table with

DLR

current data.

3 Manual Number 9017680 • Revision J, May 4, 2020

SECTION 1 GENERAL DESCRIPTION

1.1 INTRODUCTION

The model TI1200 series Static Electrical Power Inverter is a lightweight power converter that
translates a 20 to 36 VDC input to a variety of application options:

Configurations

Model Part

Output Typical Application

Number

TI1200 6431200-1 115 VAC, 60 Hz, 1200VA General purpose 115V cabin power
TI1200 6431200-2 115 VAC, 60 Hz, 1200VA Edge mount, non-TSO
TI1202 6431200-3 230 VAC, 50 Hz, 1200VA General purpose 230V cabin power
TI1200 6431200-4 115 VAC, 60 Hz, 1200VA High-peak power microwave ovens/coffee

makers

TI1202 6431200-5 230 VAC, 50 Hz, 600VA For aircraft with power-limited electrical

systems
TI1204 6431200-6 115 VAC, 400 Hz, 1200VA General purpose 400Hz aircraft power
TI1204 6431200-7 115 VAC, 400 Hz, 1200VA Emergency or General Purpose 400Hz

aircraft power. MS3102A24-11P Connector.

Table 1.1

The TI1200 Series is designed to provide up to 1200 watts (VA) of power.*

For all TI1200 Family inverters the AC output is defined as a pure sine wave with typically less than

2.5% of total harmonic distortion for clean, noise-free, harmonic-free power to supply loads of
corresponding voltage, power and frequency. For the TI1200, the 115VAC 60 Hertz (Hz) is suitable
for nearly any common commercial or consumer load rated for a nominal input of 115VAC. The
TI1202 is designed for a 230VAC output with an AC frequency of 50 Hz for international equipment.
The TI1204 is designed to meet 115VAC 400Hz for aircraft system uses.

The TI1200 Series Static Inverter is FAA certified to Technical Standard Order (TSO) C73 and tested
to rigorous environmental standards and levels according to RTCA/DO-160G. 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, and a remote on/off function.
The rugged extrusion that houses the unit is designed to help dissipate heat and provide mechanical
strength against vibration or other possibilities of damage. Two independent fans allow for a smaller
unit, quiet operation, and keep the internal components cool extending the life of the unit.

The True Blue Power TI1200 series has proven to be modular and adaptable to meet a variety of
custom applications and modifications. If you have specific functional needs in a power inverter,
inquire with the True Blue Power sales team.

* 6431200-5 version has been current limited to produce 600VA max for specific applications.

4 Manual Number 9017680 • Revision J, May 4, 2020

1.2 TECHNICAL SPECIFICATIONS

Electrical Attributes

6431200-1, 2, 4 6431200-3 6431200-5 6431200-6 6431200-7

Input Voltage:
(see Figure 4.2)

Input Power: 60 amps; 0.2A at no load 30 amps;

Rated 28VDC nominal

20-36VDC 18-36VDC

60 amps; 0.2A at no load

0.2A at no
load

Output Voltage:

115VAC at 60
Hertz

230VAC at 50 Hertz 115VAC at 400 Hertz

Pure sine wave, Single Phase, Voltage ±3%, Frequency ±0.1%

Output Power: 1200 VA 600 VA 1200 VA
Power Factor: -0.8 to +0.8
Efficiency: 88% nominal
Total Harmonic

Distortion (THD)

< 2.5% < 3% < 3.5%

Table 1.2

Physical Attributes

6431200-1, 3, 4, 5, 6 6431200-2 6431200-7

Weight: 7.25 pounds
Dimensions:

(not including connector

12.00 inches long x 6.32 inches wide x 3.45 inches high

mate)

Mating Connector (and
cable clamp):

Mounting:

MS3106A24-12S, MS3106E24­12S or equivalent (MCI P/N
9017235-1)
Base mount –
orientation not
critical

Table 1.3

Edge
mount

MS3106A24-11S or
equivalent (MCI P/N
9019110-2)

Base mount – orientation
not critical

Qualifications (excluding -2)

FAA Qualification: TSO-C73
Environmental Qualification: RTCA DO-160G; see Section 5.2 for details
Altitude: -15,000 ft. to +55,000 ft.; See Figure 4.3

Temperature: -55°C to +70°C (-67°F to +158°F); See Figure 4.1

Table 1.4

5 Manual Number 9017680 • Revision J, May 4, 2020

SECTION 2 PRE-INSTALLATION CONSIDERATIONS

2.1 COOLING

No external cooling is required. The unit is equipped with two internal DC fans. Restriction to airflow
can cause overheating of the unit and limit performance or reduce the expected life of the product.
Make sure to provide adequate clearance on both ends of the unit with the hexagonal openings to
allow for proper circulation. In general, four to six inches of clearance on both ends of the unit should
be acceptable. Mounting the unit to a metal surface can also help reduce the effects of temperature
within the unit but is not required.

2.2 EQUIPMENT LOCATION

The TI1200 Series Static Inverter 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.
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 TI1200 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. This applies to the TI1200 models.
Performance complies fully with all tests and requirements of the MPS of the TSO
accordingly.

2) Alternating current (AC) output is provided at 230 volts and 50 Hertz in lieu of 115 volts and
400 Hertz as identified in the MPS of the TSO. This applies to the TI1202 models.

3) Equivalent environmental qualification was verified per RTCA DO-160G in lieu of those
identified within the MPS of the TSO.

6 Manual Number 9017680 • Revision J, May 4, 2020

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.

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.

MOD 0

MOD 1

MOD 1
& MOD 2

Figure 2.1

Nameplate and MOD Status Example

7 Manual Number 9017680 • Revision J, May 4, 2020

SECTION 3 INSTALLATION

3.1 GENERAL INFORMATION

This section contains interconnect diagrams, mounting dimensions and other information pertaining
to the installation of the TI1200 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 6431200-( )
B. Mating Connector (& cable clamp) For most TI1200 models MCI P/N 9017235-1

(MCI P/N 9017235-2 cable clamp)
For 6431200-7 use MCI P/N 9019110-1
(MCI P/N 9017235-2 cable clamp)

C. Installation Manual MCI P/N 9017680

Equipment not provided:

A. Mounting Hardware four (4) ¼-20 pan head screws

¼” lock washers (optional)

B. Cable Harness Wire See Section 3.3 for specifications

3.3 INVERTER CONNECTIONS AND WIRE HARNESS

TI1200 Connectors

Figure 3.3.1 Connectors for 6431200-1 through -6 (Left) and 6431200-7 (Right)

Pin Assignment Information

Most TI1200 models use a MIL-5105 5-pin 24-12 contact arrangement. The TI1204 model
6431200-7 uses the 24-11 contact arrangement. With all TI1200 models, there are two power
input pins, two AC output pins, and one pin used for ENABLE control.

8 Manual Number 9017680 • Revision J, May 4, 2020

6431200-1, 3, 4, 5, 6 6431200-7

Recommended

Wire Gauge

Mating Connector

28VDC Power In
28VDC Power

MS3106A24-12S

or MS3106E24-12S

Pin A Pin D 8 AWG
Pin C Pin F 8 AWG

MS3106A24-11S or

MS3106E24-11S

Return
AC Volt Output
AC Volt Return
ENABLE
Unused Pins

Table 3.3.2: Connector Pinouts and Recommended Wire Gauge

Pin B Pin B 14 AWG
Pin D Pin C 14 AWG
Pin E Pin E 16 to 24 AWG

Pins A, G, H, I

Pin Description Information

Inverter Power Input:

28VDC Input (Positive) – Normally +24 to 32 VDC from the aircraft 28 VDC power bus
through a circuit breaker.

28VDC Return (Negative) – Internally this pin is isolated from the inverter case/chassis.
Typically this lead is connected to aircraft ground. In aircraft with a negative return bus
connect this lead to the return bus.

Common practices for the connecting the -28V of power devices in aircraft vary. The TI1200
Series passes DO-160G Section 21 conducted emissions testing using both methods (below)
as listed in Section 5.2 of this report.

1. The negative lead connects from the device to the negative power bus.

2. 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.

Inverter AC Output:

The AC output pins of the TI1200 series inverter are isolated from the inverter case/chassis.
AC Volt Output – 115VAC, 60Hz, 400Hz or 230VAC, 50Hz. The AC output can be
considered as “Line” or “Hot” when referenced to terrestrial/utility power designations.
AC Volt Return – The AC return can be considered as “Neutral” when referenced to
terrestrial/utility power designations.

On/Off ENABLE Control:

For most TI1200 models (6431200-1 through -6) the inverter output is ENABLED by
connecting the ENABLE pin to either DC Negative or to aircraft ground. If the inverter is to be
ENABLED at all times then the ENABLE pin can be connected directly to DC Negative. By
utilizing a switch between this pin and ground or negative, the switch will allow remote on/off
control of the unit.

9 Manual Number 9017680 • Revision J, May 4, 2020

For the TI1204 6431200-7 model only, the inverter is ENABLED if this connection is open or
connected to ground. To turn the inverter OFF remotely, a switch must be used to pull-up this
pin to 28 VDC positive.

On all models the ENABLE pin has approximately 11 VDC present from an internal source
and is limited to less than 1 mA. A small low-current relay or open-collector transistor can be
used to control ENABLE from other systems.

Wire Selection

Use of PTFE, ETFE, TFE, Teflon, or Tefzel stranded insulated wire is recommended for
aircraft use. Use the wire gauges for each of the pins in the connector per table 3.3.2:
Note – Because of lower current requirements, the TI1202 600VA 6431200-5 model can be
installed using 10 AWG for 28VDC input power and 16 AWG for the AC output.

Circuit Breaker on Input Power:

Connect TI1200 1200VA models to the aircraft 28 VDC bus using a 60-70 Amp circuit
breaker. (For the 600VA 6431200-5 use a 30 or 35 Amp circuit breaker.

Circuit Breakers on AC Output:

Use of a circuit breaker on the AC output is optional. On 115VAC models a 10 Amp circuit
breaker is sufficient for the full inverter 1200VA output. For 230VAC /1200VA models use a 5
Amp circuit breaker. For, 230VAC/ 600VA models use a 2.5 Amp circuit breaker. For
convenience at each AC outlet, individual circuit breakers of 1 to 5 amps each can be used. If
a single pole breaker is used, install the breaker on the AC Output. If a double pole breaker is
installed route the AC Output and the AC return through the circuit breaker.

Use with GFI, Noisy electronics, and other Earth/Neutral Situations

The TI1200 series of inverters is fully electrically isolated from the DC input as indicated by
TSO-C73, and provides a balanced AC output where AC output and AC return are not
associated with the inverter case ground. This is different from terrestrial AC systems where
Neutral is connected to ground at an AC distribution transformer at the power mains.

Some consumer items contain internal power supplies that require an Earth-Neutral
connection for their noise filters to work properly. Similarly, some GFI protection will not
function properly if there is not an Earth/Neutral connection or if there is noise between Earth
and Neutral.

If consumer video electronics exhibit noise interference, if touch-screen devices exhibit
erratic touch-screen operation, or if added GFI systems exhibit false-tripping, then it is
recommended to place a capacitor between the inverter AC return (pin D) and the inverter
chassis ground or airframe. This capacitor can be located anywhere between the inverter
output and the further-most AC outlet. A film capacitor, metalized polyester or metalized
polypropylene with a value between 0.047uF and 0.1uF rated for at least 200VAC (for
115VAC inverter output voltage) or 300VAC (for 230VAC inverter output voltage) can be
used.

10 Manual Number 9017680 • Revision J, May 4, 2020

Harness Verification

With the TI1200 Series Static Inverter disconnected, activate the aircraft power bus that
supplies the unit and use a multi-meter to verify that aircraft power and ground with
appropriate voltage is on the pins within the mating harness.

Figure 3.4 Example Wiring Diagrams

(Only Fig 3.3.1 pin numbering for 24-12 style connector shown)

11 Manual Number 9017680 • Revision J, May 4, 2020

The wiring diagrams of Figure 3.4 provides general examples of typical installations. The
configuration of individual aircraft installations may vary. Refer to Section 3 of this manual for
circuit breaker rating(s), recommended wire sizes, and other details as these vary with the
different model inverter output voltage and power ratings. The different connector of the
6431200-7 is not shown in these diagrams.

3.4 MOUNTING

Refer to Section 2: Pre-Installation Considerations in regards to equipment location.
The TI1200 Series Static Inverter is designed for base mounting only. Four ¼-20 mounting holes
should be provided in the aircraft in accordance with Figure 3.5. Secure the unit with four ¼-20 pan
head Phillips screws, or equivalent. A lock-washer under the head of each screw is recommended.

3.5 INSTALLATION CAUTIONS

The TI1200 series is not protected against reverse polarity on the input 28VDC. Verify the voltage
polarity on the connector before connecting to the TI1200 for the first time.

The TI1200 series does not have the ability to phase sync the output to other AC power sources. Do
not connect the output of the TI1200 to any other inverter or AC source or damage to the TI1200 will
result.

NOTE – Digital meters measure AC voltage with a very high impedance. As noted in section 3.3.7
the TI1200 series has a balanced AC output that is not referenced to the chassis. If a digital meter is
used to measure the AC output to chassis, the reading will correspond to approximately ½ the
inverter rated output voltage. This reading may vary depending upon the presence of an optional
noise capacitor (section 3.3.3), permanently wired accessories, or presence of an external GFI.
However, this voltage is not a problem and is a result of using a high-impedance meter to measure
AC voltages.

3.6 INSTALLATION COMPLETION

Prior to operating the unit in the aircraft, it is recommended to verify the output and functionality of
the unit. In order to prevent accidental damage to other systems, it is best not attach the output to
other equipment or power busses prior to verification.

Verify the output of the unit at the terminating end of the cable with a multi-meter to ensure proper
voltage and polarity. Once verified, installation can be completed and functionality of the remote
on/off feature (if used) should be checked.

12 Manual Number 9017680 • Revision J, May 4, 2020

6.32

3.750

12.00

11.250

9.75

A

E

B

D

C

Connecter per
MS3102A24-12P

Fan Air Exhaust at connector End Fan Air Intake at this end of Inverter

(4x) Ø 0.281
1/4-20 Mounting
Holes

3.46

Figure 3.5 TI1200 Series Outline Drawing

13 Manual Number 9017680 • Revision J, May 4, 2020

SECTION 4 OPERATION

4.1 ELECTRICAL PERFORMANCE

The TI1200 Series Static Inverter converts a direct current (DC) voltage input to a regulated, pure
sine wave alternating current (VAC) output. Different models provide for outputs of 115 VAC 60 or
400 Hz, and 230 VAC 50 Hz. The unit is capable of providing 1200 watts to power a variety of
aircraft accessories including laptops, personal electronics, onboard systems, and many others. For
aircraft or helicopters where less electrical system current is available, a 230VAC 600 VA model of
the TI1200 is available. (See Table 1.2 for tolerance ranges)

The TI1200 series is designed as a two-stage, solid-state switch-mode power supply. The power
transformation utilizes a first-stage full-bridge methodology followed by an H-bridge AC forming
second stage. The primary stage utilizes ‘current-mode’ control providing instantaneous load
protection as an advantage over legacy designs that incorporate ‘voltage-mode’ controllers. The
alternating current is frequency controlled using a crystal oscillator reference.

1300

1200

1100

1000

900

(Watts)

800

700

600

MaximunOutputPower

‐60 ‐50 ‐40 ‐30 ‐20 ‐10 0 10 20 30 40 50 60 70

Dashed line
represents
operation
between
18-20V for -7
version only

MaximumOutputPower

1400

1200

1000

(Watts)

AmbientTemperature(oC)

Figure 4.1

Output Power Performance vs Temperature

800

600

400

200

0

18 20 22 24 26 28 30 32 34 36

InputVoltage(VoltsDC)

Figure 4.2

Output Power Performance vs Input Voltage

14 Manual Number 9017680 • Revision J, May 4, 2020

1300

1200

1100

1000

900

(Watts)

800

700

MaximumOutputPower

600

‐15 ‐5 5 15 25 35 45 55

Altitude(thousandfeet)

Figure 4.3

Output Power Performance vs Altitude

4.2 PROTECTIVE FEATURES

Remote On/Off

The TI1200 Series Static Inverter incorporates a remote on/off feature that allows the user to
enable or disable the output of the unit. By providing a ground on the appropriate pin (See
Table 3.3.2) the user, via a remote mounted switch or similar method, can enable the output
of the unit. The unit can be similarly disabled by removing the ground signal (open circuit) to
the same pin.

For the TI1204 6431200-7 model only, the inverter is ENABLED if this connection is open or
connected to ground. To turn the inverter OFF remotely, a switch must be used to pull-up this
pin to 28 VDC positive.

Over-Voltage

When the input voltage exceeds the operating range of the unit (See Table 1.2; Input
Voltages) the unit senses an over-voltage condition and disables the output. The unit will
dynamically monitor the input voltage such that if the input returns to within the normal
operating range, the output will be enabled and allow the unit to operate normally.

Under-Voltage

When the input voltage drops below the operating range of the unit (See Table 1.2; Input
Voltages) the unit senses an under-voltage condition and disables the output. The unit will
monitor the input voltage such that if the input returns to within the normal operating range,
the output will be enabled and allow the unit to operate normally.

15 Manual Number 9017680 • Revision J, May 4, 2020

Over-Temperature

The TI1200 Series incorporates an internal temperature sensing device that provides
monitoring to the control circuits. When the unit senses an internal condition that exceeds
maximum temperature, the inverter output is disabled and the internal cooling fans will
continue to operate. The unit output will again be enabled when the temperature returns to
within acceptable limits. This over-temperature reset occurs automatically without any
external intervention required.

Short Circuit and Over-Current for the 6431200-1, -2, -3, -5, and -6

The TI1200 Series is will tolerate short circuit or over-current events without permanent
damage or effect to long-term reliability. The unit can provide, over its rated power output, up
to 110% of rating or 1320 VA continuously (660VA for the 6431200-5). The power output is
limited by temperature, input voltage and altitude as shown in Figures 4.1, 4.2, and 4.3. The
TI1200 senses output current pulse-by-pulse to determine a short circuit or over-current
situation.

If the load exceeds approximately 120% to 130% of rating or 1450VA to 1550 VA
(approximately 720 VA for the 6431200-5), the output will limit by clipping the peaks of AC
sine wave, limiting the power output.

At loads higher than approximately 1500VA, the inverter will not only clip the peaks of the AC
sine wave output, but will begin to cycle the AC output ON and OFF at a 5 to 7 second rate
further limiting the output power. Loads connected to the inverter output which use a power­ON momentary pushbutton feature will automatically turn-off when inverter output turns-off
which should automatically remove some of the load on the AC circuit. When the inverter
output cycles back to ON a few seconds later, the reduced load may allow the inverter to
automatically return to continuous normal output.

At a full short circuit, a TI1200 series inverter will only draw around 10 amps from the 28V
input, and will cycle ON and OFF at a 5 to 7 second rate continuously.

Once the overload or short circuit condition is removed, the AC output will return to normal
operation within 7 seconds.

Over-Current and Installation for the 6431200-4

The typical TI1200 series provides for an instantaneous peak-power output of greater than
1800 VA. However devices such as microwave ovens using an internal high-voltage
transformer with rectified output to a magnetron, or electronic coffee makers that control
heating by AC phase-modulating the heating element may be rated for an average of only
1200VA, but may exhibit an instantaneous peak power of 2200VA. For these applications,
the 6431200-4 inverter is specially intended to meet the requirements of high peak-power AC
loads with high crest power-factor or AC phase-modulated power requirements.

16 Manual Number 9017680 • Revision J, May 4, 2020

At loads exceeding the overcurrent setting of the 6431200-4, the inverter will clip the peaks of
the AC sine wave output. At higher levels than this the AC output will cycle ON and OFF at a
5 to 7 second rate limiting output power. At a full short circuit, the inverter will only draw
around 10 amps from the 28V input, and will cycle ON and OFF at a 5 to 7 second rate
continuously.

Once the overload or short circuit condition is removed, the AC output will return to normal
operation within 7 seconds.

Because the overcurrent operation of the 6431200-4 is set much higher, this model of
inverter should be direct wired to the load, or have a dedicated outlet to the item being
powered. The output of the inverter should not be available for general cabin use or
inadvertent overloading of the inverter could occur damaging the inverter.

Over-Current and the 6431200-7

The TI1204 model 6431200-7 does not cycle the AC output ON and OFF at high overload.
During high overload and short-circuit this model inverter will power for 8 to 15 seconds
before latching OFF. Either the input power or the ENABLE must be cycled to restore inverter
output. This inverter operates same as the legacy unit this model replaces.

Temperature Regulated Cooling

The unit is equipped with two internal brushless DC fans for cooling to extend the power
range and long-term life. The fans are activated at a specified point determined by the
continuous monitoring of the internal temperature. The fans operate very quietly to reduce
the audible noise in any environment. The two fans provide independent redundancy for
protection of the unit in the event that one becomes inoperative.

17 Manual Number 9017680 • Revision J, May 4, 2020

SECTION 5 CONFORMANCE

5.1 CONTINUED AIRWORTHINESS STATEMENT

No periodic scheduled maintenance or calibration is necessary for continued airworthiness of the
TI1200 Series Static Inverter. If the unit fails to perform to specifications, the unit must be removed
and serviced by Mid-Continent Instruments and Avionics or their authorized designee.

5.2 ENVIRONMENTAL QUALIFICATION STATEMENT

MODEL NUMBER: TI1200 PART NUMBER: 6431200-( )

DESCRIPTIONS: Static Electrical Power Inverter CERTIFICATION: FAA TSO-C73
MANUFACTURER: True Blue Power, a division of Mid-Continent Instrument Co., Inc.
ADDRESS: 9400 E. 34th St. North, Wichita, KS 67226, USA.
SPECIFICATION: Test Specification (TS) 501 Test Data Sheet (TDS) 501
STANDARD: RTCA DO-160, Rev G, dated 12/08/10

CONDITIONS SECTION DESCRIPTION OF TEST

Temperature and Altitude 4 Category F3(Y)

Temperature Variation 5 Category S2

Humidity 6 Category B

Operational Shock and Crash Safety 7 Category B

Vibration 8 Fixed Wing: Category R; Curves C, C1

Rotorcraft: Category U; Curve G

Explosion 9 Category H

Waterproofness 10 Category W

Fluids 11 Category X

Sand and Dust 12 Category X

Fungus 13 Category X

Salt Fog 14 Category X

Magnetic Effect 15 Category Z

Power Input 16 Category A (RI)

Voltage Spike 17 Category A

Audio Frequency Conducted Susceptibility 18 Category R

Induced Signal Susceptibility 19 Category AC

Radio Frequency Susceptibility 20 Category RR

Emission of Radio Freq Energy 21 Category B

Lightning Induced Transient Susceptibility 22 Category A3G3

Lightning Direct Effects 23 Category X

Icing 24 Category X

ESD 25 Category A

Fire, Flammability

26

Category C

REMARKS:
Section 4: Category F3 with excursions as declared by the manufacturer:

• 4.5.3 Ground Survival High Temp: +85°C • 4.5.5 Loss of Cooling: 300 minutes; +40°C

• 4.5.3: Short-Time Operating High Temp: +70°C, 75% • 4.6.2 Decompression: +8,000 feet

• 4.5.4 Operating High Temp: +70°C, 75% • 4.6.3 Overpressure: -15,000 feet

18 Manual Number 9017680 • Revision J, May 4, 2020