POWER INTERFACE

UNIT

(PIU)

PIU : INTRODUCTION The system features: Static Mains Regulator. Built- in isolation transformer. Micro-controller based AMF Panel. Security & Safety Alarm System. Lightning & Surge Protection. AC Distribution. SMPS Battery Charger for DG battery. High/Low Voltage Disconnection. Modular Arrangement. Integrated System for easy installation & operation. User Friendly Interface NMS.

S.NO PARAMETERS SPECIFIED

1 Lightning Protection 10/350_s, 100kA @let through voltage<700V

2 Surge Protection 8/20_s , 15 Ka

3 High Voltage / Low Voltage Protection(True RMS)

Input > 240V< 485 V(Extended – 265 – 470V)Output < 240V> 200VResponse time < 10ms

4 N – Earth Protection Over voltage with complete true isolation

5 Manual Error Protection Imported Machine Interlock accessories

6 AMF Panel Micro controller based true RMSequipment, GEN ON-OFF Control & Alarms

7 Line Conditioner Static Line Conditioner withIsolation Input two phase - 240 – 485V(Extended 265 – 470V)Isolation Output single phase - 200 – 240V

8 Distribution for external load As per customer requirement

9 Dimension 1800mm x 600mm x 400mm

10 Weight 300Kg.

A Sample Specs Sheet

LighteningProtection

SurgeProtection

Auto PhaseSelector

Line Conditioning

Unit

ACDistribution

Panel

InputMCB

To SMPS

To Air Conditioner

To Power Points

To Lights, Fans, etc

To Aviation Lamp

L1L2

L3

N

P1

P2

P

N

Block Diagram of PIU

Lighting and surge protector

PIU of acme telepower is incorporated with lightning protection of 10/ 350 micro sec, 100 KA @ let through voltage < 700 ; where as for surge protection of about 8/20 micro sec ,15 KA .

Auto phase selector

It will select another two healthy phase out of three phases. Healthy phase - Voltage across phases between 240V to 480V

Central processing unit

Brain of PIU, responsible for performing various functions like measuring, display, adjustment and interface, alarm, automation and rectification and coordination between various internal as well external parameters.

Line Conditioner Unit

Equipment operates with microprocessor-based controller to provide correction of mains even in micro seconds. System supports to operate on phase-to-phase basis to get rid of neutral problem, as it is very common. Mains utilization even at extreme low voltage 140V for air-condition operation

Alarm Interface

Extension of alarms from cpu card.

ALARM S AND MEASURES TO BE TAKEN

AC Distribution Panel

AC Distribution panel is provided for load termination. SMPS, Air conditioners, Power Point and Tube Light for Aviation Lamp etc are being connected to various points. Surge arresters for class I protection are provided on the input interface panel before the output gets divided to MCBs

Automation Layout ( New)

Alarm Extension from PIU, Color Codes for each

Alarm From PIU

SN Type of Alarm Safety Status in existing PIU Alarm Cable Pair Details

1 Mains fail Alarm Available Brown(Com),Red(NO)

2 Door open (FROM SENSOR) Alarm Available Brown(Com),Brown(NO)

3 Smoke & fire Safety+Alarm Available Black(com),Blue(NO)

4 Room Temperature high Alarm Available Brown(NC), Grey(NO),White(com)

5 Low fuel level (at 50% fuel) Alarm Available Black(com),Orange(NO)

6 Load on DG Alarm Available Grey(com),Red(NO)

7 DG on Alarm Available Red(NO),orange(NC),Green(Com)

8 DG fail to start Alarm Available Green(NC),Red(NO),White(Com)

9 DG fail to Stop Alarm Available Blue(NC),ORANGE(NO) ,White(COM)

10 DG Common fault

Alarm+ Safery( incase of Alternator fault and HCT/LLOP) Available Blue(Com),White(NO),Red(NC)

10.a a. LLOP Safety+Alarm Available Availble in common fault pair

10.b c. Alt.faultLED indication + Alarm as DG Common fault Available Availble in common fault pair

10.c d. HCT/HWTLED indication + Alarm as DG Common fault Available Availble in common fault pair

10.d e. V belt

Safety+ Alarm as DG Common fault( can be connected as HCT Port) Available Availble in common fault pair

10.e f. LWL

Safety+ Alarm as DG Common fault( can be connected as HCT Port) Available Availble in common fault pair

BHARTI 11:30:35T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VMAINS OK

BHARTI 12 JAN,2004T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VOP1:230V OP2:000V

+yes

- NO- NO

menu

LOG

Scroll

888888

888888

DISPLAY

888888

RESET( +)(-)MENUNOT USEDSCROLL

POWER ONCPUMAINS OKMAINS FAILROOM TEMP HIGHSMOKE / FIREEMERGENCYOVER LOADLCU FAIL

L1-L2

I

MAINS VOLTAGE

O/P CURRENT

FREQUENCY

DGMAINS

DG FAIL TO STARTDG FAIL TO STOPALTERNATOR FAULTLLOPDG FUEL LOWENGINE TEMP HIGHNADG BATTERY LOW

CENTRAL SUPERVISIORY UNIT

888888

888888

888888

MAINS VOLTAGE

O/P CURRENT

FREQUENCY

CENTRAL SUPERVISIORY UNIT

POWER ONCPUMAINS OKMAINS FAILROOM TEMP HIGHSMOKE / FIREEMERGENCYOVER LOADLCU FAIL

DG FAIL TO STARTDG FAIL TO STOPALTER. FAULTLLOPDG FUEL LOWENGINE TEMP HIGHOVER SPPEDDG BATTERY LOW

L1-L2

I

DG

MAINS

+yes

- NO- NO

menu

LOG

Scroll

Emergency OFF DisableON/OFF TIMERON TIME 18:30OFF TIME 06:30

HIGH ROOM TEMP. Cut off32OCDEFAULT FACTORYBHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VMAINS OK

HIGH VOLT CUT OFF485VLOW VOLT CUT OFF240VHIGH VOLT CUT IN470V

LOW VOLT CUT IN265VDG HIGH VOL CUT OFF250VDG LOW VOL CUT OFF195VOVER LOAD70ADG LOCK5 MINDG LONG LOCK10 MINTEMP LIMIT FOR BATT34OCP.P BATT MIN VOLTAGE23.5VPP/ BATT NOR. VOLTAGE25.0VHIGH ROOM TEMP. CUT IN35OCFIRST START PULSE2 SECSECOND START PULSE3 SECTHIRD START PULSE4 SECDG STOP PULSE40 SECDATE/ TIME SET11:30:3011.07.2004

HIGH Engine Temp DisableBHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VMAINS OK

START

MAINS 240-480IN BEST OF

2 PHASE

MAINS OK

LCUOP1

180-250

OK

LCU FAIL NOT OK

NO

VDC =23.5VTEMP 340C

BATT ON DG SENSE

OK NOT OK CHECK

1

2

DG IS RUNNING

DG STOP

YES

NOYES

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VSTART

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG SENSE

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VMAINS OK

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VBATT ON

DG SENSE

LLOP NO( PIU) LLOP NC(BC)HCT NC(PIU)

DG STARTOK

DG VOLTAGE 195-250

NOT OKOK

NOT OK

LLOP NC(PIU)LLOP NO (BC)

DG LOCKFOR 5/10 MIN.

DG STOP

OK NOTOK

DG FAULT ALARM

3 TIMES

RETRY

DG FAULTWITH LLOP AL.

AFTER 5/10 MINDG ON

DG FAULTDG FAIL TO

START

AFTER 3 RETRY

DG CHECK

DG IS RUNNINGVOLTAGE

YES

NO

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG SENSE

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG FAULT

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG START

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG CHECK

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG LOCK

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG ON

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG STOP

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG FAULT

DG ON

LLOP NC ( PIU) DG VOLTAGE

MAINS VOLTAGE5 Hrs TIME

LLOP NC

DG VOLTAGE BEYOND 195-250

MAINS OK240-480

5 Hrs DGDG CONT. RUN

DG STOPDG FAULT

LLOP ALARM

DG STOPDG FAULT

ALTER.FAIL

DG STOP GOTO 1

DG STOP GOTO 2

WAIT MAINS & GOTO 1

WAIT MAINS & GOTO 1

SITE ON DG

DG FAILTO STOP ALM

IF NOT

1

2

DG DISC.

DG DISC.

DG DISCNo load 5 min

.

DG DISC.

DG VOLT=0LLOP NO(PIU)

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG ON

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG STOP

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG FAULT

BHARTI 09:30:30T:0000000.5 VGEN:000VTEMP:25.0OC VDC:27.0VDG DISC

Trouble Shooting

Trouble Shooting Contines……

Do’s and Don’ts

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