Lindsay Broadband T-Former Series User manual

T-Former Series
Stabilized Pure Sine Voltage Technology
LB-TFPS-180-540-90UI Installation Manual
May 2019
Adjustable Power Supply 180 -540VA

Page 1: ………………………………………………….……………….Overview
Page 2: ……………………………………………………………….. Technology
Page 4: …………………………….……………………….Safety Instructions
Page 5: ……….……………………………………………..Utility Connection
Page 6: ……………………………… Mounting LB-TFPS-180-540-90UI
Page 7: ………..Connecting Power Cable to T-Former AC Output
Page 9: ……………..………………………….. Installation and Operation
Page 11: ……………………………………….…… Power Supply Functions
Page 12:……………………………………….Troubleshooting and Repair
Page 13: …….…………………………………………………….Specifications
i
Table of Contents

Fig 1: ………………………………………………….……………….Efficiency Chart
Fig 2: ……………………………………………….. Block Diagram T-Former P.S
Fig 3: …………………………….………………………. NEMA 5-30R receptacle
Fig 4: ….……………………………………..Service Entrance Circuit Breaker
Fig 5: ………………………………………Mounting LB-TFPS-180-540-90UI
Fig 6:……………………………………….Power Supply Output Connection
Fig 7: ………………………………………………..….Output Power Connector
Fig 8 …………………………………………..…90° Output Power Connector
Fig 9: …………………………………………..……………………………Flex Jumper
Fig 10: ………………………………………………….…….. Dip Switch Location
Fig 11: ………………………………………………….…Dip Switch Adjustments
Fig 12: …………………………………………………….Power Supply Functions
Fig 13:………………………………………………………..Troubleshooting Table
Fig 14: ………………………………………………………………….Specifications
ii
List of Figures and Tables

Overview:
The LB-TFPS-180-540-90UI T-Former indoor power supply is a pure sine
wave adjustable power supply (180 to 540VA), with the highest-
efficiency, and most reliable technology. With almost double the lifetime
of comparable Ferro-Resonant products, it delivers at least 5% energy
savings compared with standard systems.
Thanks to its patent- pending sine wave stabilizer technology, the T-
Former's advanced electronic controller automatically monitors the line
voltage and compensates for any changes, eliminating negative
Inrush current side effects resulting from utility power recovery. In
addition, the T-Former operates in complete silence - solving noise
and vibration problems inherent in existing Ferro-Resonant products.
T-Former is designed to work at a wide range of temperatures and
humidity without maintenance, at full power capacity. 100% of Lindsay's
T-Formers undergo rigorous and repeated quality testing.
T-Former - High Efficiency Power Supply
•Lower Operating Costs - saves at least 5% energy compared to Ferro-
Resonant power supplies.
•Lower Capital Cost per unit - compared to traditional Ferro-Resonant
devices
•Longer Life -Unique technology enables almost unlimited lifetime
•No Noise, No Vibration
•Slow Start: In-rush Current Protection
•Automatic electronic overload protection
1

•The LB-TFPS-180-540-90UI utilizes a unique US Patent AC/AC variable
ratio transformation which provides ultimate voltage regulation and
pure sine voltage output at all loads. Input & output Voltage are
completely isolated. Line conditioning enables the changing of “gears”
at O time "zero crossing". This smooth online transformation between
gears provides clean AC pure sine voltage without any RF noise.
•An extra feature of the LB-TFPS-180-540-90UI T-former is its SOFT
STARTUP, solving the most inherent problem of Ferro based power
supplies; In-Rush Current. This innovative solution controls the
current level during start-up and prevents the circuit breaker from
tripping during start up or utility power interruption due to in-rush
currents.
•The system also has electronic overload protection, protecting the
network and minimizing fuse blow when momentary short circuits
occur.
•Lindsay LB-TFPS-180-540-90UI T-Former power supply offers the most
efficient technology with 95% efficiency at a wide range of loads.
Figure 1: Efficiency Chart
Technology
2

Basic Block Diagram
Figure 2: Block Diagram T-Former Power Supply
3

•Review the Installation Manual before proceeding. If there are any
questions regarding safe installation or operation & performance
please contact us at: [e-mail].
•Prior to any handling, the power supply must be disconnected from
the Mains.
•Only qualified and authorized technicians should perform power
supplies installations.
•Verify that the power supply input voltage configuration matches the
standard utility voltage level.
•Verify that the power supply output voltage configuration matches
the CATV voltage and load requirements. DO NOT exceed the output
rating of the power supply.
•Equip the Utility Service entrance box with the proper rated circuit
breaker.
•Connect grounding cable between power supply ground to utility
grounding point.
•Prior to installation or removal verify that utility circuit breaker is OFF
and that there is no voltage at the power supply.
Safety Instructions:
4

Utility Connection:
120VAC 15A
•NEMA 5-15R receptacle, 120V 15A
•10 Amp circuit breaker installed in service entrance box.
Figure 4: Service Entrance Circuit Breaker
Figure 3: NEMA 5-15R receptacle
5

Mounting LB-TFPS-180-540-90UI
The LB-TFPS-180-540-90UI power supply can be wall or shelf mounted.
The LB-TFPS-180-540-90UI is designed for temperatures of -40 to +60C
and can be mounted in an outdoor enclosure. The outdoor enclosure
should have a ¾” plywood backing so that the power supply can be
mounted.
Figure 5: Mounting LB-TFPS-180-540-90UI
6
Mounting holes

Connecting Power Cable to T-Former AC Output
All Lindsay Broadband power supplies have high current output quick type
connectors without seizure screws.
•Simply plug in connector at the panel.
•Connection is made quickly and reliably from outside.
•Beryllium, copper contact.
•Insure all output connectors are rated for:
•90VAC continuous
•20Amps Continuous
Note: The length of the center conductor must be 10 mm. The center
conductor must be cut clean to allow for complete fit.
Figure 7: Output Power Connector
Figure 6: Power Supply Output Connection
7

A Flex Jumper with a male connector at one end and female connector at
the other end can also be used. The flex Jumper must be capable of 20A
continuous current.
Figure 9: Flex Jumper
Figure 8: 90° Output Power Connector
Bandwidth: 0 MHz to 1 GHz
Impedance: 75 Ohms
Return Loss: Better than -30 dB to 1 GHz
Insertion Loss: Less than 0.10 dB to 1 GHz
Operating Voltage Rating: 90 Volts (@ 60 Hz continuous AC)
Operating Current Rating: 20 Amps (@ 60 Hz continuous AC)
Operating Temperature Range: -40°to +140°F (-40°to +60°C)
Shielding Effectiveness: >120 dB
Recommended Output Connector Specification:
8

•The LB-TFPS-180-540-90UI power supply is factory assembled at 6 Amp
maximum on the output port. The output port has a T8.0A fuse.
•System reliability depends on protecting the power supply from
overcurrent events. Through proper fuse selection, you can minimize
risks and failures.
•Verify current draw on each output port. Pick a slow-blow fuse 130%
higher than output port current draw. (ie. Output port has 3A current
draw; 3A + 130% = 3.9A, replace 8A fuse with a 4A fuse).
•Insure that the output load does not exceed 6 Amps.
Installation and Operation:
9
•Adjusting the maximum output current:
•Remove front Panel of power supply
•Locate Dip Switches; Dip switches are on the right hand side of
the main PC board.
Figure 10: DIP Switch Location

•Adjust dip switches for desired output current. (Refer to Figure 10).
•Adjusting the power manually allows the operator to pay flat rate for
the real energy consumed instead of paying for the Power Supply
rated power.
Current
Limit -90V
DIP Switch Position
321
2AOFFOFFOFF
3AONOFFOFF
4AOFFONOFF
5A
OFFOFFON
6AONONON
Figure 11: DIP Switch Adjustment
10

1. 120VAC main input
2. Chassis Ground
3. Output (90VAC)
4. Output Fuse
5. Output Voltage Test Point
6. Test Point Common Port
7. Output Current Test Point (1A=0.1V)
8. Output Status LED
Power Supply Functions
Figure 12: Power Supply Functions
11
1
2
3
4
5
6
7
8

Troubleshooting and Repair
The T-former P.S is designed to be the most reliable P.S that can be used
for unlimited time at all weather conditions, even at maximum load. The
Power supply has slow-start circuit and overload protection to prevent the
most common failure at the network such as inrush current that switches
OFF the circuit breaker, or blows the fuse as a result of overload or short
circuit. This guide explains the possible, yet rare symptoms:
Figure 13: Troubleshooting Table
6A 6A
12

Specifications
Figure 14: Specifications
13
Electrical Input
Input Voltage Range
102
- 132 Vac
Input Frequency
60 Hz
Input Current
2.15 < Imax < 4.3 A (adjustable @120 Vac)
Input Power Factor
>0.98 (10
- 100% load)
Output
Output Voltage
90 Vac
±2%
Output Current
2.6 < Imax < 5.75 A (adjustable)
Short Circuit time response
<10 ms
Output Power
180
- 540 VA (adjustable)
Efficiency
>96 % (@ 25
- 90 % load)
Mechanical
Dimensions (HxWxD)
10.8"H x 6.4"W x 4.5"D (273H x 163W x 114D mm)
Weight (lb/Kg)
28 lb (12.9 kg)
Housing Finish
Corrosion protected + Epoxy coating
Enviornmental
Operating Temperature
-
40°C to +60°C (-40°F to +140°F)
Humidity
0 to 100 % non
-condensing
Standard Features
Power Main Cable
✔
Mains Transients Protection
✔
Quick Connect Output Coax Socket
✔
Power Indication (Green/Red LED)
✔
Surge Immunity
EN61000
-4-5
2.0 kV(1.2/50
μs, 2 Ω) ✔
ANSI
\SCTE 81 2012
6 KV 10/700
μSec ✔