Military Engineer Services

Military Engineer Services has published Tender For Special Repair Replacement Of Servo Voltage Stabilizers Against Ber At Rms; 1 Supply, Installation, testing and commissioning of 75 KVA capacity Servo controlled voltage stabilizer ( conforming to BIS 9815 (Part-I) : 1994, reaffirmation 2019 latest version). Three phase, four wire (RYBN), 50 Hz Naturally Oil cooled, indoor, unbalance type, cooper wound, metallic body duly power coated with lifting Hooks two nos, digital display type, relay free smooth and silent operation with 1st filling of Transformer oil up to level, with following specification:- (a)Capacity - 75 KVA.(b)Type - Suitable for unbalanced load and unbalanced input.(c)Input voltage - 300V-480V, input frequency 50 Hz.(d)Output voltage - stabilized at any designed/ desired voltage 415 - ± 1%(e)Rated Frequency - 50Hz.(f) Wave form distortion-Nil(g)Response time - not to exceed 20 milli seconds.(h)Sensitivity - (+/-) 1%(j)Rate of correction - Not less than 6 Volt/ second between phase and neutral(k) Efficiency - more than 95%(l)Type of load - three phase, unbalanced type(m) Metering- Digital display Voltmeter/ Ammeter with multi - functional meter(n)Operating Temperature - For indoor use upto max ambient temp + 550 C(o)Dimmer rating 20 Amp(p)Dimension of tanks - (43 x 22 x 40) in inches(q)Oil capacity 160 (Ltrs)(r) Class of insulation - Class F 2 Item No.1.00 Contd....(s)Mode of operation Automatic/ manual(t)Winding Temperature rise - Max 550 C (100 C above operating temp)(u)Transformer oil - IS 335 marked (v)Core - CRGO M4 Grade / CRNO (Cold Roll Grain Oriented)/ (Cold Rolled Non Oriented)(w)Auto Transformer (Variac) - 100 percent Copper wound Electrolytic Grade (x)Losses - As per IS Norms(y)Power Factor - Not less than 0.95(z)Protection - (i)Over load protection(ii) Short Circuit protections(iii)High/Low voltage cut off(iv)By pass arrangement in case of Emergency(v) Single phase sequence change/ phase fail protection(vi)Earth fault protection (aa) Standard Fitting & Accessories e.g. Marking plate, lifting lugs, CI Rollers, EarthingTerminals etc cable box. 3 Supply, Installation, testing and commissioning of 100 KVA capacity Servo controlled voltage stabilizer ( conforming to BIS 9815 (Part-I) : 1994, reaffirmation 2019 latest version). Three phase, four wire (RYBN), 50 Hz Naturally Oil cooled, indoor, unbalance type, cooper wound, metallic body duly power coated with lifting Hooks two nos, digital display type, relay free smooth and silent operation with 1st filling of Transformer oil up to levellevel, with following specification:- (a)Capacity - 100 KVA.(b)Type - Suitable for unbalanced load and unbalanced input.(c)Input voltage - 300V-480V, input frequency 50 Hz.(d)Output voltage - stabilized at any designed/ desired voltage 415 - ± 1%(e)Rated Frequency - 50Hz.(f) Wave form distortion-Nil(g)Response time - not to exceed 20 milli seconds.(h)Sensitivity - (+/-) 1%(j)Rate of correction - Not less than 6 Volt/ second between phase and neutral(k) Efficiency - more than 95%(l)Type of load - three phase, unbalanced type(m) Metering- Digital display Voltmeter/ Ammeter with multi - functional meter(n)Operating Temp - For indoor use upto max ambient temp + 550 C(o)Dimmer rating 32 Amp(p)Dimension of tanks - (49 x 26 x 40) in inches(q)Oil capacity 240 (Ltrs)(r) Class of insulation - Class F 4 Item No.2.00 Contd...(s)Mode of operation Automatic/ manual(t)Winding Temperature rise - Max 550 C (100 C above operating temp)(u)Transformer oil - IS 335 marked (v)Core - CRGO M4 Grade / CRNO (Cold Roll Grain Oriented)/ (Cold Rolled Non Oriented)(w)Auto Transformer (Variac) - 100 percent Copper wound Electrolytic Grade (x)Losses - As per IS Norms(y)Power Factor - Not less than 0.95(z)Protection - (i)Over load protection(ii) Short Circuit protections(iii)High/Low voltage cut off(iv)By pass arrangement in case of Emergency(v) Single phase sequence change/ phase fail protection(vi)Earth fault protection (aa) Standard Fitting & Accessories e.g. Marking plate, lifting lugs, CI Rollers, Earthing Terminals etc cable box. 5 Supply, Installation, testing and commissioning of 150 KVA capacity Servo controlled voltage stabilizer ( conforming to BIS 9815 (Part-I) : 1994, reaffirmation 2019 latest version). Three phase, four wire (RYBN), 50 Hz Naturally Oil cooled, indoor, unbalance type, cooper wound, metallic body duly power coated with lifting Hooks two nos, digital display type, relay free smooth and silent operation with 1st filling of Transformer oil up to levellevel, with following specification:- (a)Capcity - 150 KVA.(b)Type - Suitable for unbalanced load and unbalanced input.(c)Input voltage - 300V-480V, input frequincy 50 Hz.(d)Output voltage - stabilized at any degined/ desired voltage 415 - ± 1%(e)Rated Frequency - 50Hz.(f) Wave form distortion-Nil(g)Response time - not to exceed 20 milli seconds.(h)Sensitivity - (+/-) 1%(j)Rate of correction - Not less than 6 Volt/ second between phase and neutral(k) Efficiency - more than 95%(l)Type of load - three phase, unbalanced type(m) Metering- Digital display Voltmeter/ Ammeter with multi - functional meter(n)Operating Temp - For indoor use upto max ambient temp + 550 C(o)Dimmer rating 40 Amp(p)Dimension of tanks - (55 x 38 x 45) in inches(q)Oil capacity 360 (Ltrs)(r) Class of insulation - Class F 6 Item No.3.00 Contd...(s)Mode of operation Automatic/ manual(t)Winding Temperature rise - Max 550 C (100 C above operating temp)(u)Transformer oil - IS 335 marked (v)Core - CRGO M4 Grade / CRNO (Cold Roll Grain Oriented)/ (Cold Rolled Non Oriented)(w)Auto Transformer (Variac) - 100 percent Copper wound Electrolytic Grade (x)Losses - As per IS Norms(y)Power Factor - Not less than 0.95(z)Protection - (i)Over load protection(ii) Short Circuit protections(iii)High/Low voltage cut off(iv)By pass arrangement in case of Emergency(v) Single phase sequence change/ phase fail protection(vi)Earth fault protection (aa) Standard Fitting & Accessories e.g. Marking plate, lifting lugs, CI Rollers, Earthing Terminals etc cable box. 7 Supply, Installation, testing and commissioning of 200 KVA capacity Servo controlled voltage stabilizer ( confirming to BIS 9815 (Part-I) : 1994, reaffirmation 2019 latest version). Three phase, four wire (RYBN), 50 Hz Naturally Oil cooled, indoor, unbalance type, cooper wound, metallic body duly power coated with lifting Hooks two nos, digital display type, relay free smooth and silent operation with 1st filling of Transformer iol up to level having following specification:- (a)Capcity - 200 KVA.(b)Type - Suitable for unbalanced load and unbalanced input.(c)Input voltage - 300V-480V, input frequincy 50 Hz.(d)Output voltage - stabilized at any degined/ desired voltage 415 - ± 1%(e)Rated Frequency - 50Hz.(f) Wave form distortion-Nil(g)Response time - not to exceed 20 milli seconds.(h)Sensitivity - (+/-) 1%(j)Rate of correction - Not less than 6 Volt/ second between phase and neutral(k) Efficiency - more than 95%(l)Type of load - three phase, unbalanced type(m) Metering- Digital display Voltmeter/ Ammeter with multi - functional meter(n)Operating Temp - For indoor use upto max ambient temp + 550 C(o)Dimmer rating 40 Amp(p)Dimension of tanks - (57 x39 x 47) in inches(q)Oil capacity 420 (Ltrs)(r) Class of insulation - Class F 8 Item No.4.00 Contd...(s)Mode of operation Automatic/ manual(t)Winding Temperature rise - Max 550 C (100 C above operating temp)(u)Transformer oil - IS 335 marked (v)Core - CRGO M4 Grade / CRNO (Cold Roll Grain Oriented)/ (Cold Rolled Non Oriented)(w)Auto Transformer (Variac) - 100 percent Copper wound Electrolytic Grade (x)Losses - As per IS Norms(y)Power Factor - Not less than 0.95(z)Protection - (i)Over load protection(ii) Short Circuit protections(iii)High/Low voltage cut off(iv)By pass arrangement in case of Emergency(v) Single phase sequence change/ phase fail protection(vi)Earth fault protection (aa) Standard Fitting & Accessories e.g. Marking plate, lifting lugs, CI Rollers, Earthing Terminals etc cable box. 9 M&L for earthing complete with galvanised iron earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 m below ground level connetced with galvanised strip of 25 x 4 mm sizeby means of nuts, bolts, check nuts and washers made of galvanised iron or steel earthing lead to be protected by galvanised iron pipe of 40mm bore (light grade) and other end connected to earthing test point or lightening arrestor or main controlling switch as directed including providing funnel with 20mm bore galvanised iron pipe (medium grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) all round the earth electrode, concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) including necessary earth work in excavation, returning filling and removal of surplus earth upto a distance not exceeding 50 m etc all as shown on electrical plate No. 3 of MES Schedule Part-I(2009) completeand accessories including testing on completionall as specified and as directed. (Note: Earth strip upto a length of 7.50 m from earth plate shall be deemed to be included in quoted rate.) . Last date of submission for this tender is 2025-12-20. This is a Voltage Stabiliser tender in Rangapahar, Nagaland