REPAIR/MAINTENANCE OF HT VCBs, RMU AND ALLIED WORKS AT MRS AND SUB STATION AT SOUTH AREA AND DABATHWA AREA UNDER AGE E/M (ES) AT GE (U) MEERUT CANTT

M & L for servicing and checking of EXISITING 11 KV Breakers any make and type make VCB with blower, cleaning of existing HT panel inside & outside with tighting of all bus bar, nut & bolt, alignment, adjustment of gaps between phase to phase as per manufacturer recommended, Checking and tightening of control wiring circuit as charging motor closing coil and tripping coil circuit, Manually tripping testing of VCB, Cleaning, removal of dust and dirt to male/Female contacts, greasing & lubrication all moving fixed part including replacement of minor parts such as spring, washers, etc. for smooth mechanical operation etc. complete with testing commissioning as required. Servicing, , testing of ( one earth fault one over current) 11 KV /VCB, Operational testing through relay front pad as well as push button, Testing of safety relays, Tripping testing of VCB through over current and earth fault relay,testing and servicing of the existing 11 kV VCB panel, including high pot tests and submission of test certificates with proper sealing. Primary injection testing to verify tripping functionality. Opening of HT panel, removal of moisture from busbars, insulators, HT cable box, and heating of P.T. and C.T. chambers. Relay settings to be checked and configured as per the protection scheme. During breaker racking, inspection of jaw-type male/female contacts connected to the busbar is included—cleaning or replacement shall be done if found carbonized or damaged. Final insulation resistance (megger) testing of all components to be completed as per standard procedures and safety norms complete all as specified and directed. Note : Minor spare part should incl in qouted rates for making functional & major spare may be pay separety as per BOQ Items.

M & L for servicing and checking of EXISITING 33 KV Breakers along with 33kV CR Panel indoor type at MRS any make and type make VCB with blower, cleaning of existing HT panel inside & outside with tighting of all bus bar, nut & bolt, alignment, adjustment of gaps between phase to phase as per manufacturer recommended, Checking and tightening of control wiring circuit as charging motor closing coil and tripping coil circuit, Manually tripping testing of VCB, Cleaning, removal of dust and dirt to male/Female contacts, greasing & lubrication all moving fixed part including replacement of minor parts such as spring, washers etc. for smooth mechanical operation etc. complete with testing commissioning as required. Servicing, testing of ( one earth fault one over current) testing of 33 KV /VCB, Operational testing through relay front pad as well as push button, Testing of safety relays, Tripping testing of VCB through over current and earth fault relay,testing and servicing of the existing 33 kV VCB panel, including high pot tests and submission of test certificates with proper sealing. Primary injection testing to verify tripping functionality. Opening of HT panel, removal of moisture from busbars, insulators. Relay settings to be checked as per UPPCL setting and configured as per the protection scheme. Final insulation resistance (megger) testing of all components to be completed as per standard procedures and safety norms complete all as specified and directed. Note : Minor spare part should incl in qouted rates for making functional & major spare may be pay separety as per BOQ items.

M & L for dismentaling of old unservicable fuse kit, kat , existing IDMT O/C & E/F relays, burnt contactores and replacement with new microprocessor type solid state electronic ON LOAD protection system with Plug Setting Multiplier of Relay, Time Setting Multiplier of Relay, Time vs. PSM Curve settings,Calculation of Relay Operation Time,1. Current setting. 2. Fault current level. 3. Ratio of current transformer. 4. Time / PSM curve. 5. Time setting. Output impedance shall be 3.0 to 5.0 percent,The card shall be manufactured such that it will maintain electrical properties, even under severe overload, under/over voltage and under/over frequency conditions. Input correction range shall be -30% to +20% of nominal input voltage. The system design shall be capable of operating at an input frequency range of -15% to +10% of nominal, without clearing protective devices or causing component failure within the Microprocessor Card. Upon turn on or restart, the output of the Microprocessor Card shall not exceed the specified output regulation limits. if the input voltage or frequency exceeds programmable minimum or maximum set points for a programmable time period (factory set for 10 seconds), the Microprocessor Card shall electronically shut off. When electrical parameters are back within acceptable limits for a programmable time period (factory set for 60 seconds), the Microprocessor Card shall automatically restart to provide conditioned power to the load. If the input parameters are within acceptable limits, but the output voltage is outside of acceptable programmed limits, the Microprocessor Card shall electronically shut off and require a manual restart. The Microprocessor Card shall be capable of operating at 100% rated

load capacity continuously, 200% rated load for 10 seconds, 500% rated load for 1 second and 1000% rated load for 1 cycle. Operating efficiency shall be a minimum of 96%, typical at full load. Transverse-mode noise attenuation shall be 3dB down at 1000Hz and 40dB down per decade to below 50dB with a resistive load. Common-mode noise attenuation shall be 140dB or greater. The Microprocessor Card shall respond to any line voltage variation in 1/2 cycle while operating linear or non-linear loads, with a load power factor of 0.60 of unity. Peak detection of the voltage sine wave shall not be permitted to avoid inaccurate tap switching due to input voltage distortion. Line Voltage Regulation and Correction Time: Output regulation shall be +5%, -6%, given an input voltage variation of -30% to +30% for nominal, when within +/-5% of the nominal frequency. The Microprocessor Card output voltage shall be corrected to within +5%, -6% or less within 1 cycle per tap for an under voltage condition. For an over voltage condition, the output shall correct within 1 cycle directly to the appropriate tap without stair-casing intermediate taps. Typical correction time shall be 1 to 2 cycles. Load Regulation: No load to full load regulation shall be 3% typical under linear loading. Note: The Microprocessor Card shall be adjusted so that the combination of line voltage regulation and linear load regulation results in a maximum output voltage variation of +7% to -8% from nominal, when within +/-5% of the nominal frequency.

Operating Frequency: The Microprocessor Card shall be capable of operating at +10% to -15% of the nominal frequency, 50Hz or 60Hz, with programmable high and low limits to alarm and electronically shut down the Microprocessor Card. Limits shall be set to +/-2Hz from nominal and electronic shutdown shall occur if limits are exceeded for 10 seconds. Once back within limits for a programmable time period of 60 seconds, the Microprocessor Card shall automatically restart. 2.5 Site Specific Data: Input Over Current Protection: The Microprocessor Card shall be provided with an integral, three pole, molded case, manually operated, thermal magnetic input circuit breaker rated at 125% of the full load input current. In addition, the system input current, Phase R, Y and B, shall be monitored and digitally displayed. A programmable over current alarm shall be provided. Bypass Switch: The Microprocessor Card shall be provided with an integral break before make rotary bypass switch. The Microprocessor Card shall be either on line or bypassed with one turn of the switch. On models where the input and output nominal voltages are different, a regulator bypass shall be provided in which the shielded isolation transformer will remain on line to provide voltage transformation and isolation. On models where the input and output nominal voltages are the same, an integral break before make rotary maintenance bypass switch shall be provided to wrap around and isolate the Microprocessor Card. In this case, an input neutral conductor(s) shall be provided and the bypass switch shall bypass the output neutral, as well as, the phase conductors. The bypass switch circuitry shall be wired such that it cannot switch the unregulated power directly to the active load. Bypass switch actuation shall trip the Microprocessor Card input breaker, so that the

facility load must then be reconnected using the input breaker.Alarms: The Microprocessor Card shall be provided with an input over/under voltage, input over current, over/under frequency, voltage phase reversal, voltage phase imbalance, output over/under voltage, and output over current alarms. The alarms shall automatically reset upon return to nominal operating conditions. Remote communication of alarms via a contact closure shall be provided. Optional digital communication via RS232 and RS485 shall be made available. The Microprocessor Card shall be provided with individual “Fuse Failure” indicator lights, phase R, Y and B, on the front panel for diagnostic purpose. The Microprocessor Card shall be equipped with True RMS Measurement, Stores last 15 faults, Detection of fault with display of parameter value, USB configuration with PRKAB, CBCT open detection circuit Earth Leakage Re to Detect and protect instruments from leakage current, Dual Color LED for fault indication, : A digital input meter shall be provided to display line voltages, line currents, frequency, kVA, kW, and power factor. A separate digital output meter shall be provided to display line to line voltages, line to neutral voltages, phase currents and neutral current. Both meters shall have programmable minimum and maximum value set points, recorded in EEPROM.

Both meters shall be capable of optional remote communications via RS232 and RS485. Input/Output Cable Connections: The Microprocessor Card shall have provisions for the installation of cable lugs directly to the input/output bus bars or conductors to the input/output terminals provided. Grounding Cable Lugs: The Microprocessor Card shall have provisions for the installation of cable lugs directly to the ground bus bar or conductor to the terminal provided. MAKE / ABB/ CG/C&S/ASHIDA MIN ISO 9001:2015 CERTFIED APPROVED BY GE ONLY Original OEM is entitled for work . Contractor has to ensure it.Necessary test certificates & Latest Purchase Vouchers to be scrutnised / approved by Engg-in-Charge & GE first before execution at site . Any Defect occuring during this period due to bad workmanship of material, manufacturing defect shall be rectified or replaced free of cost. The contractor shall furnish written gaurantee on letter head for above mentioned to the GE immidiately after completion of work. Contractor has to ensure Post Audit of work, without that completion will not be issued.

M & L for dismantling of old 11kV CT at Dabatwaha and replace with new 11kV Current Transformer (CT) with three-core CT cores required for metering, protection, in an existing 11kV system Typical CT Core Requirements for 11kV System Function CT Core Required CT Core Class Burden (VA) Metering 1 core Class 0.2 / 0.5 5–15 VA Protection 1 core Class 5P10 or 10P10 15–30 VA (typically) REF Protection 1 core Class 5P20 or PS (special) Depends on scheme (15–45 VA or more) Metering: Needs high accuracy (Class 0.2 or 0.5). Low burden. Protection: Requires higher accuracy at higher currents (Class 5P10 or 10P10). Should operate correctly under fault conditions. ŌC/EF used for overcurrent and earth fault protection REF protection Very sensitive to current mismatch. Requires matched CTs with wide dynamic range (Class PS or 5P20). Used on both sides of a transformer. For an 11kV feeder, typically 3 CT cores per phase are required: • Core 1 – Metering • Core 2 – Protection (OC/EF) • Core 3 – REF The OEM of CT must take the data like lead resistance, relay burden, and system fault level from the MES before designing PS class CT. Core 1 & 2: Protection Cores These cores are designed to operate accurately during fault conditions and saturate quickly above the fault level to protect connected relays. Accuracy Class: Typically 5P or 10P (e.g., 5P10, meaning 5% error at the accuracy limit factor of 10).Burden: Typically 10 VA, 15 VA, or higher, depending on the connected relay's requirements and cable length.Accuracy Limit Factor (ALF): e.g., 10 or 15. Special Purpose (PS) Class: For high-impedance or differential protection, a PS class is used, specified by:

Knee Point Voltage Not less than 700 V (depends on ratio and burden).Excitation Current Specified at a certain percentage of the knee point voltage. Secondary Winding Resistance Measured and considered for relay settings. Saturation Factor: Minimum of 10 for standard protection cores. Core 3: Metering Core This core is designed for high accuracy under normal operating conditions. It has a low Instrument Security Factor (ISF) to protect the connected meters from damage during high fault currents. Accuracy Class: Typically 0.2S, 0.5, or 0.5S.Burden: Typically 5 VA or 10 VA.Instrument Security Factor (ISF): Less than 5 at the lowest ratio to protect meters complete all as specified and directed.

M & L for Retrofitting, Installation, and Commissioning of REF / Earth Fault Protection Relay safely dismantle the existing, unserviceable protection relay and execute the Supply, Installation, Testing, and Commissioning (S/I/T/C) of an advanced, flush-mounted, microprocessor-based Restricted Earth Fault (REF) / Directional Earth Fault Protection Relay. REF IR-protection relay comply with the IEC/DIN regulations required for the specific protection application. Plug-in technology & easy operation, quick fault-analysis and optimal communication capabilities are based on the microprocessor technology with following characteristics:Integration of multiple protective functions into one compact housing,User-friendly setting procedure by means of DIP-switches,Compact construction type by SMD~technology & also Complete suitable for earth fault directional detection with Rated data: Nominal current IN : 1A/5A Nominal frequency fN : 50/60 Hz Power consumption : 97% Returning time : 30 ms Minimum operating time : 30 ms Output relay characteristics: Maximum breaking capacity : 250 V AC / 1500 VA / continuous current 6 A Design standard : VDE 0435, part 303, IEC 255.4, BS 142 Specified ambient service Temperature range: for storage : - 40°C to + 85°C for operating : - 20°C to + 70°C Environmental protection class F as per DIN 40040 and per DIN IEC 68 2-3 : relative humidity 95 % at 40°C for 56 days Insulation test voltage, inputs and outputs between themselves and to the relay frame as per VDE 0435, part 303 IEC 255-5 : 5 kV; 1.2/50 Hz; 1 min. (except supply voltage inputs) Impulse test voltage, inputs and outputs between themselves and to the relay frame as per VDE 0435, part 303 IEC 255-5 : 5 kV; 1.2 / 50 μs; 0.5 J High frequency interference test voltage, inputs and outputs