POWER SUPPLY

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GOVERNMENT OF INDIA
DEPARTMENT OF SPACE
ISRO SATELLITE CENTRE (ISAC)
AIRPORT ROAD, VIMANAPURA POST
BANGALORE 560 017

TENDER NOTICE NO.22 DATED 03/03/2005

On behalf of President of India, Head, Purchase & Stores, ISRO Satellite Centre
(ISAC) Bangalore 560 017 invites sealed tenders for the supply of the following
items:
TENDER
SL
TENDER FEE
NO BRIEF DESCRIPTION QTY
REFERENCE INCL OF
S.TAX

01. ISIP 2004000430 DEHUMIDIFIER UNIT 01 No. 218.00

02. ISIR 2004000638 SWITCHING MATRIX 400 CHANNELS 01 No. 218.00
As Per
03. ISIR 2004001270 UNIMATIC BLIND RIVERT Docu- 218.00
Ment
POWER SUPPLY 04
04. ISIR 2004001240 218.00
Nos.

05. ISIR 2004001253 MINIATURE PRESSURE TRANSDUCER 10Nos. 218.00

DUE DATE FOR RECEIPT OF TENDER: 18TH APRIL 2005 AT 1600HRS.(IST)
TENDER OPENING DATE : 19TH APRIL 2005 AT 1000 HRS.
:2:

NOTE:

1. Those who desirous of not utilizing the website shown at clause 16 can
also buy the tender documents from Asst Purchase Officer, Purchase &
Stores Division, ISRO Satellite centre, Airport Road, Vimanapura PO.
Bangalore 560 017, India on payment of non-refundable tender fee as
indicated above, on all working days between 1400Hrs to 1600Hrs.
2. Tender fee shall be payable only in the form of bank draft drawn in favour
of Accounts Officer, ISRO Satellite Centre, payable at Bangalore. No
other mode of payment for tender fee is acceptable.
3. Venders/firms name and tender no. shall be indicated on the reverse side
of the Demand Draft.
4. While requesting for tender documents, please do not superscribe tender
number and due date on the envelope.
5. Detailed specification, terms and conditions are furnished in the tender
documents.
6. DD should not be dated prior to the date of advertisement / Intimation /
website. Separate requests and demand drafts shall be sent for each
tender document.
7. ISAC will not be responsible for non-receipt of tender documents/offers
due to postal delay / loss in transit.
8. Quotations received without payment of tender fee will be treated as
unsolicited.
9. Indian agents while quoting on behalf of their principals are requested to
provide necessary authorisation letter from their principals
10. The offer should be valid for the period of ninety days from the date of
opening.
11. Quotations received after the due date and time will not be considered.
12. While submitting your offer please super scribe tender no. and due date
on the envelope.
13. If tender opening date happens to be a public holiday tender will be
opened on the next working day.
14. No request for the extension of the due date will be considered.
15. Head, Purchase and Stores ISAC reserves the right to accept or reject
any tenders in part or full without assigning any reasons thereof..
16. Tender documents are also available on ISRO Web site www.isro.org. of
Tender Notice No.22 dtd 03.03.2005. Interested tenderers may, at their
option, download the tender documents from website and submit offers
along with the prescribed tender cost (In terms of Bank Draft) as per
details in the tender notification.
ISIP 2004000430

DEHUMIDIFIER UNIT
QTY. : 01 No.
Specifications:
Solid desiccant type Dehumidifier unit and complete system for applications of
online dehumidification of ducted systems directed onto a specimen in a clean room
environment of class 100,000. Dehumidifier unit shall be fully automatic factory-
assembled packages unit complete with inlet filter for process air, process motor, process
fan, volume control dampers at outlet, desiccant rotor drive assembly, reactivation
electrical heaters, inlet pre-filters for reactivation air, regeneration motors & fan,
thermostats, automatic built-in electrical panel with humidistat, total frame & panels
powder coated and supplied with lifting lugs.

PERFORMANCE REQUIREMENTS

1. Type : Solid desiccant based, rotating wheel type
dehumidifier

2. Capacity : ≥ 1200 CMH @ 20°C and ρ= 1.2 kg/m3 standard
air conditions.

3. Moisture removal rate required : ≥ 10.1 kg/hr.
or
4. Process air outlet conditions for available inlet air conditions

Sl. Available inlet conditions Required outlet conditions
No.
01. DBT of 24 °C DBT ≤ 50° C
02. RH of 55 ± 5 % RH ≤ 10 %
03. Air cleanliness class of Cleanliness of air stream shall be same as
100,000 class inlet conditions, i.e. 100,000 class. No kind
of any contaminations shall be added to the
air stream by this unit.

5. Static pressure required in the air
stream outlet (Available static pressure) : ≥ 500 Pa
6. Type of regeneration : Electrical regeneration with counterflow
arrangement of process and reactivation
air
streams.

7.Regeneration temperature : ≤ 130° C

8. Rotor type : High performance corrigated chemical type
honeycomb rotor having a life span of
more
than 10 years

9. Process and reactivation section : Positive sealing arrangement between
process and reactivation sections shall
permit independent airflow and shall not
require balancing of process and reactivation
airflows within the unit. Seals shall be made
with high temperature withstanding silicon
rubber/Viton with minimal wear and tear
composition.

10. Outlet hose/duct size : φ 220 mm (approx.) and duct shall be
provided
in horizontal axis.

11. Max. Noise level unducted : ≤ 85 dBA

REQUIRED FEATURES

The dehumidifier unit shall be equipped with :

(i) Hours run counter to monitor the number of hours the system is operational.

(ii) Blocked filter alarms.

(iii) Rotor stopped alarms

(iv) Humidity control system with alarm and display.

(iv) Replaceable process and reactivation filters.

(v) Face damper of low leakage design and are operated by a proportional
actuator.
(vi) Total frame and panels shall be powder coated in white colour as a clean
room installation requirements. The total unit shall have very good aesthetic
appealing finish.

(vii) The unit should have it’s own structural steel skid with adjustable feet and the
unit
shall be able to move using forklift or by lifting lugs.

III. ELECTRICAL REQUIREMNTS

(i) Control panel shall be in-biult with the unit. It shall be factory mounted and
wired with fan motors/MCBs, auxiliary controls, over-load protectors,etc. Starting
and stopping of the unit shall be sequenced by a humidistat sensor.
Manual off-auto switch shall also be provided on dehumidifier panel. All switch
gear of either Siemens , L&T or similar Reputed make only. Pre-wired &
pre-tested electrical control board ready for connection to mains.

(ii) IEC protective class for unit : IP 44

(iii) IEC protective class for electrical panel : IP 54

(iv) Winding insulation standard for fan motor
and drive motor : Class F

(v) High temperature cut-out : 140 ± 5 °C, adjustable from 130°C
to
170°C

(vi) Amperage rating for remote on relay and
alarm contacts : 5A, 250 VAC (Max.)

IV. UTILITIES REQUIREMENTS

(a) Total Electrical power requirements : ≤ 24 kW

(b) Electrical ratings : The unit shall be suitable to either
230V AC, 50 Hz single phase or
440V AC, 50Hz, 3-phase electrical
supply.

(i) DH unit with By-pass dampers of low leakage design and are operated by
proportional actuator to provide upto 100% bypass capabilities.

(ii) Stainless steel metal casing instead of powder coated steel casing.

ACCEPTANCE TESTS

Vendor/supplier should carry out acceptance tests which will be witnessed by
our Engineers at vendor’s site prior to shipments.

WARRANTY

The supplier should provide a minimum of 1 year warranty for poor performance,
workmanship, material or components defects.

STATEMENTS AND REFERENCES

(i) Vendor should provide compliance statements in point-wise for our
specifications along with quote.

(ii) Deviations if any from our specifications should be clearly mentioned with
merits.

(iii) Product catalog/leaflet in original/xerox copy shall be enclosed along with
quote.

(iv) Vendor should provide product heritage for similar kind of units supplied
elsewhere and shall also furnish customer’s name, address with Tel No.
and fax. No. if any along with quote.

It may be noted that the offer received without above
details/informations
will be rejected.

************************
ISIR 2004001253

SPECIFICATIONS FOR PRESSURE TRANSDUCER AND SIGNAL
CONDITIONER

I(a). Pressure Transducer – Titanium casing

Type of transducer Dynamic
Pressure range 0 – 500 psi
Resonant frequency > 4MHz
Sensitivity < 0.5mV / psi
Non-linearity </- 0.5% of FSO
Zero measurand o/p <± 10m Vmax
Size <dia.12mm x 16mm length
Mounting To be weldable
Case material Titanium alloy – Ti6AI4V
Supply voltage 10 – 15 V DC
Quantity Quote in slabs of 5 nos. up to 20
Nos Minimum order quantity to be
mentioned by Vendor

I(b) Signal Conditioner

Type Fully differential, signal ground isolated
from case ground
Compatibility To be fully compatible with above
transducer
Excitation Voltage To provide suitable excitation to the
transducer
Output Single ended with one side connected
to ground
Output range ± 5.0V
Display 4 ½ digit display of pressure in psi, bar
and mV
Control switch Zero adj. and gain adj.for calibrating
transducer
Supply voltage 2230 VAC, ±10%, single phase, 45 –
65 Hz.
Quantity One No
Accessories Any other standard accessory may be
quoted
ISIR 2004001270

UNIMATIC BLIND RIVERT

QUANTITY

1. NAS 1919C 05S 02U - 10,000 Nos.

2. NAS 1919C 05S 03U - 3,000 Nos.

NOTE: TEST REPORTS OF MECHANICAL PROPERTIES (SINGLE SHEAR AND \

ULTIMATE TENSILE) TO BE SUBMITTED ALONG WITH QUOTATION.
ISIR2004001240

SINGLE-OUTPUT 2000WATTS GPIB POWER SUPPLY

The required de power supply should have

• Proven reliability, high efficiency and low noise operation
• Option for programming the dc output and the protection
Circuits either from the front panel or using industry standard
SCPI commands via the GPIB
• VXI Plugs & Play drivers for easy integration
• Control option with analog signals for output voltage and current
• Fan-speed control to minimize acoustic noise
• Low ripple and noise
• Accurate built-in measurement system should be for both current
and voltage measurements
• Provide over-voltage and over-current protection
• Remote programming and sensing as built in feature

DC outputs
Voltage / Current:0 to 120 V / 0 to 18A

Load regulation
Voltage <0.002% + 4mV

Line regulation
Current <0.005% + 1 mA

Ripple and noise(20Hz and above)
Voltage <1.9mV rms/16 mV p-p
Current <12 mA rms

Programming accuracy
Voltage = 0.04% + 120 mV
Current = 0.11% + 12 mA
Readback accuracy at 25º C
Voltage = 0.05% + 180 mV
Current = 0.1% + 18 mA

Resolution
Voltage = 30 mV
Current = 4.5 mA
OVP = 215 mV

Transient response = 0.9msec to within 10mV for a change in output
current form full load to 50% load or vice versa.

Output Voltage Programming Response Time : within 195 msec for
full rate load form 10% to 90% or vce versa.

Command Processing Time : 20ms (Time to change in o/p voltage
after digital date is received by the supply)

DC floating Voltage : ± 240Vdc between output terminals and
Chassis ground

OutputCOmmon mode Noise Current :0.5mA rms, 4mA peak-to peak.

Weight , 32 kgs
Size to fit within a rack size of 5.5 in x 17 in x 25.5 in
Input = 230±10% Vac, 50Hz (approx)

Warranty : Minimum One year

Documentation : User Manual, Service Manual, Calibration
Certificate.
ISIR 200400638

Specifications for switching matrix

1. 400 channels of 2 pole
2. GPIB interfaceable
3. Break before make
4. Cross talk <-65 db at 1 MHZ
5. Switching speed <1 msec
6. Brake before make
7. Trigger sources external trigger
8. Operating Maximum voltage 250VDC
10
9. Path isolation 10 ohms
10. Rear connections
11. Display dual line fluorescent
12. Jitter <50 microsecs
13. Integrates easily to DMM
14. Full channel display
15. Working with National instruments cards and Equipments
16. Works under Labview software
17. Maximum current 1 A
18. mat able with 50 pin ITT male connector
19. With all necessary supporting soft ware and hardware
20. 1 year warranty extension
Block Diagram for testing Continuity , Cross continuity check, and
Insulation measurement of Solar Panels

300 wires from satellite
PC through ITT connector

Switching matrix
HP
METER