I/H CONVERTER (Current to hydraulic Pressure ... - bhel.com

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 1 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

I/H CONVERTER (Current to hydraulic Pressure converter)

1.0 APPLICATION:

This specification specifies the requirements of current-to-hydraulic pressure proportional converter (I/H converter) used in steam turbine governing system along with the cables and connectors.

2.0 TECHNICAL DETAILS:

2.1 DESCRIPTION

“I/H Converter with manual actuating knob”.

2.2 TYPE

The I/H convertor shall be of proportional type meeting the flow requirements as mentioned below in the hydraulic data and the electrical data. The convertor shall have in-built dither and shall be of “plug and play” type independent of any other software modules for its functioning

2.3 ELECTRICAL DATA (to be mentioned on the name plate)

Supply voltage : +24V DC (permissible range 20 – 30 V DC including ripple)

Power consumption : Normal: (to be indicated by supplier) Max: (to be indicated by supplier)

Analog Input signal : 4 – 20 mA

Analog output signal : 4 – 20 mA (accuracy within ±1% of full scale) Protection class : Selected as per variant table and to be indicated

accordingly

2.4 HYDRAULIC DATA (to be mentioned on name plate)

Supply pressure : 8±1 bar (g) (normal) 11 bar (g) (max)

Output signal pressure : 1.5 – 4.5 bar (gauge) 4 mA corresponds to 1.5 bar (adjustable between minimum 1 to 2 bar) 20 mA corresponds to 4.5 bar (adjustable between a minimum 3 to 5 bar)

Outlet volumetric flow : 45 lpm (minimum) at ∆P = 1 bar

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 2 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

Degree of filtration : ≤50 microns (admissible contamination level – NAS 1638 Class 7)

Leakage : < 4 lpm

Oil type : Mineral oil (synthetic based)

Viscosity range : 20 -100 cSt

Seals material : Viton-A (compatible to oil type mentioned above)

2.5 PERFORMANCE CHARACTERISTICS

Hysteresis : <0.2% of total range

Repeatability : <0.1% of total range

Accuracy : <0.1% of output value

Conversion time : < 35 msec

Fail safe operation : Control oil output to drain on loss of input signal or power failure

2.6 ENVIRONMENTAL DATA

Surrounding temperature : -40 °C to +85 °C

Humidity : 100% condensing

Shock : 10 g peak for 0.011 seconds

Vibration : 18 to 500 Hz at 4.2g

Working temperature of fluid : +30 °C to +70 °C

2.7 HYDRAULIC CONNECTIONS

i) All the hydraulic connections shall be on one side of the manifold block, which shall be part of the supply of the converter.

ii) Supply, drain and output signal connections shall be of suitable NPT female threaded type and shall be indicated by the supplier.

iii) The supply shall also include hydraulic blocks (if applicable) and suitable flushing plates and mounting connecting parts and fasteners as may be necessary.

2.8 ELECTRICAL CONNECTIONS

Electrical connection : Cable with connectors (in-line with the actuator variant model)

Cable length : 5 meters

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 3 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

2.9 ADDITIONAL SCOPE (to be supplied with actuator)

i) 1 set of soft seals of all types used in the convertor.

ii) Connecting plates / Adapter plates

iii) Flushing plates

iv) Brackets for mounting

v) Fasteners as required and all special tools required for the manual operation as well as any maintenance shall be necessarily part of supplies without exception.

vi) All accessories for configuring viz. Tablets / Laptops, their connecting cables and software shall be part of the supplies.

3.0 DESCRIPTION (NAME) PLATE

Language : English

Data as per clause 2.3 & 2.4 shall be included in the description plate.

4.0 DOCUMENTS

The description catalogues giving full sectional details and mounting details of the convertor shall be furnished along with the offer and also with the consignment. 5 copies of Operation, Maintenance & Trouble shooting manuals in English language shall be supplied within 4 weeks of placement of order.

5.0 TEST CERTIFICATE

Three (3) copies of test certificate and adjustment protocol shall be furnished for each converter assembly quoting BHEL standard number, Purchase order number and serial number of the equipment.

6.0 GUARANTEE CERTIFICATE

A guarantee certificate for 24 months of trouble free performance from the data of shipment or 12 months from the date of commissioning whichever is later shall be furnished.

7.0 PACKING

The material shall be properly packed to ensure it is capable of withstanding transit risks without damage. Hydraulic port openings shall be plugged or closed with a locking plate. The packing shall be sea-worthy.

8.0 ACCEPTANCE CRITERION

8.1 Vendor shall provide a reference list of the offered product in steam turbine applications and supplied to OEMs.

8.2 The offer is liable to be rejected if the reference list does not have at least ten different references of I/H convertors (of all types mentioned in variant table) in similar application for steam turbines from OEMs’ and under successful trouble free operation

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 4 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

for more than 2 years.

8.3 End user feedback from the above references shall be furnished along with the offer for consideration of the offer.

8.4 OFFER STAGE

Vendor shall submit following test certificates:

1) Input signal versus pressure

2) Flow versus differential pressure

3) Dynamic response test (Pressure versus time)

4) Hysteresis 5) Hazardous area certification as per clause 10.0

6) Check list as per clause 13.0

9.0 MARKING

9.1 A tag bearing 12 digit material code shall be attached to each converter.

9.2 The following details shall be marked on packing case

1) Manufacturer’s name

2) Manufacturer’s model number

3) BHEL order number

4) BHEL standard number, TC51275.

10.0 HAZARDOUS AREA CERTIFICATION

The IH converter proposed to be used in hazardous area shall be flameproof Ex-d certified for using in hazardous area IEC Zone-1, Gas gr. IIA, B & C, T4. Statutory certificates shall be furnished as follows:

10.1 For all explosion protected equipments / instruments / systems or equipments with any other type of protection allowable as per this specification which are manufactured abroad and certified by any statutory authority like BASEEFA, FM, UL, PTB, LCIE etc. should also have the approval of Petroleum And Explosives Safety Organisation (PESO) / Chief Controller of Explosives (CCE), Nagpur. PESO certification is a statuatory requirement for use of explosion protected items / instruments in India.

10.2 For all flame proof equipments manufactured locally (indigenously), the testing shall be carried out by any of the test house like CMRI / ERTL etc. The equipment shall in addition bear the valid approval from Petroleum and Explosives Safety Organisation (PESO) / Chief Controller of Explosives, Nagpur and a valid BIS license.

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 5 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

11. VARIANT TABLE

VARIANT NO. DESCRIPTION MATERIAL CODE

01 Explosion proof IH converter:

This shall be Flame proof Ex-d certified as per IEC 60079 for using in hazardous area IEC zone 1, Gas group II A, B & C.

TC9751275016

02 Weather proof IH converter: This shall be complying to Protection Class IP65

TC9751275024

03 Connector with cable for Weather proof I/H Converter

TC9751275032

12. RECORD OF REVISIONS

REV.

DATE REVISION DETAILS REVISED APPROVED

02 03.12.15 Variant 03 added. AT SG/KHS

03 19.05.20 Sl.No. 2.9 (Additional scope) revised. Sl.No. 10 (Hazardous area certification) added. Generally revised

AT SG/KHS

This Drawing is printed from Engineering Digital Archive System (EDAS).Therefore signatures are not essentially required.

May Thu 21 14:55 2020

HYDERABAD

PRODUCT STANDARD TURBINES & COMPRESSORS

TC 51275

REV 03

PAGE 6 OF 6

FORMAT: PREPARED BY: APPROVED BY: DATE:

TD - 201 SG KHS 21.03.2012

REV - 00 COPY RIGHT AND CONFIDENTIAL The information on this document is the property of BHEL. It must not be used directly or indirectly in any way detrimental to the interest of the company.

REF DOC:

13. CHECK LIST (to be duly filled and certified by supplier)

S.No. Description Yes / No Document No.

1.0 Company name

2.0 Model No. of IH converter offered

3.0 Detailed catalogue enclosed

4.0 Additional literature enclosed

5.0 General arrangement drawing enclosed

6.0 Cross section drawing enclosed

7.0 Oil connection details and mounting details enclosed

8.0 Supply oil cleanliness requirement

9.0 Filter requirement in oil supply line

10.0 Recommendation of filter type and size

11.0 Power consumption Normal: Maximum:

12.0 Electrical connection diagram enclosed

13.0 Electrical connector details

13.0 Deviation to specification

14.0 Details of deviation to be specification enclosed

(Signature and Seal of company)