Training GXTMT Models

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Training - GXT-MT Models

• By
• V.Manoj Kumar

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GXT-MT Models
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OUTLINES

• Introduction
• Feature
• Main specification
• I/P
• O/P
• Overload Capacity
• Battery charger
• Environmental
• Battery Run Time
• Parallel Redundancy

• Outside the UPS
• Front Panel
• Panel Display
• Load/Battery Status Indicator
• Rear Panel
• Inside the UPS
• PCBs Location
• Main Structure
• Selectable Parameter

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OUTLINES

• How to Maintain UPS
• Take Care of Yourselves
• Before Starting Service
• Find Out the Problem by Debug Flow Chart
• LED Display Explanation
• Recover the Unit - Alignment Check

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Feature

• High frequency PWM technology
• Intelligent ?-computer (CPU) inside
• Double conversion design
• Zero transfer time
• Pure sine wave output
• High input power factor(gt0.95)
• Long back-up time with external battery packs (LB
  model )
• 4/8 Amp Super charger(Long back-up models)

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SpecificationInput
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SpecificationOutput
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Specification for Overload Capacity

• 13KVA
• 108 lt Load ? 150
• Line Mode Switches to bypass after 30 sec and
  overload fault, alarm.
• Battery Mode 30s then turn off output and alarm
  
• Load gt 150
• Line Mode Switches to bypass after 300ms and
  overload fault, alarm.
• Battery Mode 300ms then turn off output and
  alarm
• Short circuit
• Immediate shutdown, alarm.

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Specification for Overload Capacity (cont.)

• 6 / 10 KVA
• 105 ? Load lt 130
• Line Mode 10mins, then transfer to Bypass and
  Alarm
• Battery Mode 10 seconds then turn off output
  and alarm
• Load ? 130
• Line Mode 1 second, then transfer to Bypass and
  Turn Off Output after 1mins and Alarm
• Battery Mode 1 seconds then turn off output and
  alarm

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Specification forBattery Charger
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Specification forEnvironmental
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Battery Runtime-1K 1K(LB)
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Battery Runtime-2K 2K(LB)
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Battery Runtime-3K 3K(LB)
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Battery Runtime-6K(LB)
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Battery Runtime-10K(LB)
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Parallel Redundancy

• What is Parallel Redundancy?
• For GXT 6/10KMT(LB) only !
• Maximum Parallel Number 3 Units.
• Refer to Parallel Installation SOP

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Outside the UPSOutside Looking
6/10KVA
13KVA
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Outside the UPSFront Panel
Status LED
Load / Battery Level LED
On / Mute switch
Off switch
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Panel Display
Line mode
Bypass mode
Battery mode
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Load/Battery Status Indicator

• Line mode Load Indicator
• Battery mode Battery Capacity Indicator

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Outside the UPSRear Panel-1K 2K
1K 1K(LB)
2K 2K(LB)
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Outside the UPSRear Panel-3K 6/10K
3K 3K(LB)
6K(LB)
10K(LB)
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Inside the UPSPCBs Location-6/10K
Control board
PSDR
Input EMI board
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Inside the UPSPCBs Location-6/10K
BUS capacity
Charger board
Output EMI board
Communication board
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Inside the UPSDifference between Standard and
LB model13K
Standard Model Built-in 7Ah CSB batteries with 1A
standard charger
LB(Long Backup) Model No built-in battery with
4/8 Amp Super Charger
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Inside the UPS Main StructureBlock Diagram of
1/2/3KVA
Note bypass mode
line mode battery
mode
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Inside the UPS Main StructureBlock Diagram of
6/10KVA
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Block Diagram
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Block Diagram
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PCB Assembly
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(No Transcript)
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Standard Back UP
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Long Backup
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GXT MT 6KVA
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GXT MT 10KVA
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GXT MT 10KVA 3Phase I/P
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PFC Section
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Inverter Section
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DC/DC Booster
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Charger Circuit
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PCBs
Parallel card
Control Card
PSDR PCB
CHARGER PCB
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Selectable Parameters

• Selectable Inherent Manual Bypass Function
• Selectable UPS Auto Restart When Power Return
• Setting via the UPS monitoring software.
• Selectable Output Voltage for 200/210/220/230/240
  Vac
• Setting by Hyper terminal program in Windows.

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How to Maintain Your UPS?

• Guideline for UPS maintain.
• Take Care of Yourselves
• Before Starting Service
• Find Out the Problem by Debug Flow Chart
• LED Display Explanation
• Recover the Unit - Alignment Check

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How to Maintain Your UPS? Take Care of Yourselves

• Something Keep in Mind
• High voltage exists everywhere, BE CAREFUL !
• Battery is extremely dangerous!!!
• Before re-plug in the INPUT LINE POWER, make sure
  all power components have been checked.

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How to Maintain Your UPS? Before Starting Service

• Be careful of some symptoms
• Environment and User Condition
• Utility voltage/frequency Generator
• Wiring
• Load Type
• Fault LED Indication
• The UPS Situation Before Service

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How to Maintain Your UPS?Before Starting Service
(Cont.)

• What should we prepare?
• At Least One Digital Multi Meter (DMM) 2 is
  ideal.
• A Discharge High Power Resistor
• Slotted and Phillips Screw Drivers
• Service Manual
• Good Spare PCB

• What should we do?
• Inspect It Carefully
• Recording Failure Situation.
• Disconnect UPS from Utility

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How to Maintain Your UPS?Guess What Happened ?
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How to Maintain Your UPS? Find Out the Problem
by Debug Flow Chart flow chart approach
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Panel LED Display Explanation-1

• Bypass Due to Over Temperature
• Cause 1Ambient Temperature is higher than
  allowed operation temperature.
• Strategy Reduce ambient temperature or O/P load.
• Cause 2 Thermal detection circuit failed.
• Strategy Refer to the thermal detection problem
  strategy. (Replace the CNTL)

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Panel LED Display Explanation-2

• Bypass Due to Inverter Failure
• Cause 1 O/P short circuit. (In this situation,
  no power will be transfer to O/P socket.)
• Strategy Remove short circuit condition, turn
  off the UPS then turn on again.
• Cause 2 Inverter circuit failed.
• Strategy Replace the PSDR.

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Panel LED Display Explanation-3

• Bypass Due to DC Bus Over-voltage
• Cause 1 Some non-fatal misbehavior of UPS.
• Strategy Turn off UPS then Turn it on.
• Cause 2 PFC circuit fails.
• Strategy Replace the PSDR.
• Cause 3 DC/DC circuit fails. (In this situation,
  AC INPUT LED will not light)
• Strategy Replace the PSDR
• Cause 3 Bus voltage feedback circuit problem.
• Strategy Replace the PSDR

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Panel LED Display Explanation-4

• Fault Due to Battery Over-Voltage
• Cause Charger circuit fail
• Strategy 1 Replace the Charger board.
• Strategy 2 Replace the PSDR

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Panel LED Display Explanation-5

• Bypass Due to Output Overload
• Cause O/P load is larger than rated load in VA
  or in Wattage.
• Strategy Removed or reduce load connected to O/P
  socket. In line mode, the UPS will restart
  automatically. In battery mode, UPS must be OFF
  in advance and ON again.

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How to Maintain Your UPS? Recover the Unit
Alignment Check

• Check Charger and Power Supply Function
• Disconnect the battery wires, connect DMM to
  Bat, Bat-.
• Connect I/P power cord to utility then disconnect
  it ASAP.
• The fan should start to rotate?
• DMM reading should be a little less than expected
  voltage.
• Panel LED should light then distinguish.

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How to Maintain Your UPS? Recover the Unit
Alignment Check (Cont.)

• Check DC/DC and CPU function
• Connect DMM to BUS voltage test points, connect
  I/P to utility.
• The BUS voltage should rise to 400V slowly
• I/P relay contact
• The BUS voltage will drop to about 325V slowly
• Adjust charger voltage to expected value
• Connect battery wires

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How to Maintain Your UPS? Recover the Unit
Alignment Check (Cont.)

• Check DC/DC and Inverter function
• Disconnect I/P power cord from utility
• After the fan stop rotating, press ON button
• The BUS voltage will rise to 400V slowly
• Inverter relay switch to INV mode
• Check O/P voltage as expect.
• Turn the UPS off

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How to Maintain Your UPS? Recover the Unit
Alignment Check (Cont.)

• Check PFC function
• Connect I/P power cord to utility
• Turn the UPS on, the BUS voltage will rise to
  380V slowly.
• O/P relay switch to inverter, inverter LED lights.

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How to Maintain Your UPS? Recover the Unit
Alignment Check (Cont.)

• Be sure to check the
• All VR are adjusted to expected value as service
  manual
• All cables and screws are firmly locked
• All air guides and accessories are recover to the
  original position
• Line, neutral and GND wires are correctly
  connected.
• Do not forget turning on UPS
• Check the environment of operation

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How to Maintain Your UPS? (Cont.)

• Something Keep in Mind
• High voltage exists everywhere, BE CAREFUL !
• Battery is extremely dangerous
• Before re-plug in the INPUT LINE POWER, make sure
  all power components have been checked.
• FFC - Frequent Fail Components
• DC/DC, PFC and INV power devices are most likely
  to fail.
• PWM IC (power supply, charger, DC/DC, PFC)
• Others

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UPS Monitoring
AS400 Card
SNMP Card
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GXT MT SNMP
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The EndThank You