purchase & stores division - ISRO

Master Control Facility – Hassan
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Microcontroller based UV & OV Relays (For T1 & T2)
Voltage Vn -110/240/415V settable at site, 50 Hz +/- 2.5 Hz, Auxiliary power
supply: 24-110V AC/DC, Settings -Fault Voltage Vs -OV mode: 105-180% of
Vn in steps of 5%, UV mode: 95-20% of Vn in steps of 5%, High Set Vhs -OV
mode 110-180% of Vn in steps of 10%, -UV mode: 90-20% of Vn in steps of
10%, Trip Time Characteristics -Normal Inverse NI -3.5 Sec in OV mode &
5.7 in UV mode, Defnite Time -01, 10 and 100 Secs, Accuracy -+/- 5% of Vn,
Auxiliary Contacts - 2 Pairs of self reset C/O contacts, Mounting -Panel
mounting (Flush) type, Relay operation should not be affected by stray
magnetic field. Make: L&T Model MV12A or equivalent in Siemens / Areva
T&D / ASEA Brown Boveri
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Protection Relay (For T1 & T2)
3Ph OC+EF+highset, Communication and breaker control with RS 485, Micro
Controller based, LS OC (20-200% step 5%) HS O/C (0.2-40) in step of 0.2 In
or disable & LS EF (5-80% step 5%), HS EF (0.1 to 20) on step of 0.1 On or
disable, HS delay (0.1 to 2 Sec) step 0.01 sec or instantaneous, Draw out
type, Auto doubling of HS, relay co-ordination, self testing & display of
parameters, Site selectable trip time characteristics (NI, VI, EI & Definite
Time), TMS 0.1-1.6 step 0.05, Auxiliary contacts 2NO+2NC, Auxiliary supply:
24-110V AC/DC, CT Rating: 5A. Make: L&T Model MC61C or equivalent in
Siemens / Areva T&D / ASEA Brown Boveri
2
5
Digital Meter (For T1, T2, G1, G2 & G3)
True RMS measuring meter to read L-L/L-N voltage, Current per phase /
neutral current, Frequency, Phase rotation / Vmax. and current demand per
phase, Vmin. per phase, %age of load circular bar graph. Capable of
measuring power parameters viz., kW & kWh, kVA & kVAh, kVAr & kVARh,
import & export etc., The meter shall be capable of reading the voltage as
well as current (THD) Harmonic, Three phase at once, bright LED display.
Communication port –RS 485 and Industrial standard communication
protocol – MODBUS, Auxiliary power supply: 24 VDC. Make: Satec
PM130EH
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6
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Differential Protection Relay (For G1, G2 & G3)
Device code: 87, 50/51, 50LBB, 64S / 87N, Design: Numeric, Functions:
Generator differential, bias % with dual adjustable slope, OC, stator EF & CB
failure protection, Features: 1A or 5A site selectable, display of parameters,
waveform capture feature, built in supervision & RS485 port, 4 C/O, S/R or
H/R or time delay 1 C/O for self supervision, Flush mounting draw out type,
Auxiliary supply 24-110V AC/DC. Make: L&T Model MD32G or equivalent in
Siemens / Areva T&D / ASEA Brown Boveri
Switch Disconnector Fuse Units (SDFU)
Triple Pole with isolable Neutral (TPN), 415V, 50 Hz, Panel mounting type
interrior version with operating mechanism and handle without HRC fuse
links. Confirming to IS 13947 (Part 3), Accessories: Terminal shrouds, Fuse
shrouds, Fuse barriers
Make: L&T F-Line FNX series / Schneider MG Fupact SDF / Siemens -
Sentron Superswitch
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7a Rating: 630 Amps 15
Semi Modular substation LT panel –Specification 10