CWE(S)/UTILITY/TOKEN/18 of 2024-25

Amount

Supply ,install, testing and commissioning of 11kV, 630A, 12.5KA Outdoor Vacuum Auto-recloser with accessories, PT, control Cabling etc, and fixing this specification to three phase, mechanically ganged operation reclosers with a rated maximum system voltage of up to 11 kV, maximum continuous current rating of up to 630 A, and up to 12.5 kA symmetrical interrupting current rating.The recloser is to be designed for pole mounted or substation installations. All of the unit’s protection, control, and metering functions shall be electronically controlled within an integrated control unit.The recloser must utilize magnetically actuated operating mechanism and use solid dielectric for insulation. Oil or SF6 gas is not acceptable as insulating material due to leakage issues. Spring operated, and high voltage solenoid mechanisms are not acceptable due to maintenance requirements.The relay used should have latest features with a large LCD to view single line diagram (SLD) and should have native IEC 61850 protocol with GOOSE messaging capabilities to reduce substation wiring. Control for the recloser shall be the RER615 complete all as specified and as directed. Make-ABB/Siemens/Schneider

Applicable Standards The recloser and its control must be designed and tested to meet the following standards: • IEC 62271-111 (2012) & ANSI/IEEE C37.60 (2012) • Standard Requirements for Overhead, Padmounted Automatic Circuit Reclosers and Fault Interrupters for Alternating Current Systems • ANSI C37.61/ IEEE 321-1973: IEEE Standard Guide for the Application, Operation and Maintenance of Automatic Circuit Reclosers • ANSI/IEEE C37.90.1-1989: American National Standard Guide for Surge Withstand Capability Tests • ANSI/IEEE C37.90.2-1993: IEEE Trial-Use Standard Withstand Capability of Relay Systems to Radiated Electromagnetic Interference from Transceivers • ANSI C37.85–1989: American National Standard Safety Requirement for X-Radiation Limits for AC High-Voltage Power Switchgear • The manufacturing facility for the recloser must be ISO 9001 and ISO 14001 certified.

Technical data Auto reclosure must meet the the following specification/Parameters :- System Parameter Nominal operating voltage - Up to 15 KV Rated maximum voltage - 15 KV Rated power frequency - 50 Hz Rated continuous normal current - 630 Amp Rated short time current withstand capacity for 3 sec - 12.5 KA Rated peak withstand current - 31.25 Kap Rated lightning impulse withstand voltage (BIL) - 110 KVp Rated power frequency withstand voltage (1 min dry) - 50 KV Rated power frequency withstand voltage (10 sec wet) - 45 KV Current switching parameters Rated symmetrical interrupting current - 12.5 KA Rated line charging current (LC) - 2 Amps Rated cable charging current (CC) - 10 Amps Switching performance Rated operating (reclosing) sequence - O-0.2s-CO-2s-CO-2s-CO Lock Out Minimum guaranteed mechanical operation (CO cycles) - 10000 Operations Minimum guaranteed operation (CO cycles) at rated continuous Operations 10000* - 10000 Operations Maximum interrupting time - 55 ms Maximum closing time - 65 ms

LV cabinet details Auxiliary power supply Supply voltage V(AC) - 90-264 V(AC) Frequency - 50 Hz Maximum power consumption including HV cabinet - 250 VA Type of battery pack - Sealed lead acid rechargeable Standard battery bank offering - 24(26) V(AH) Standard battery back-up - 24 Hrs Provision for powering communication modem - 24//7 VDC/W Current sensor Type - Current transformer Current transformation ratio - 600/1 Class - 10P10 Voltage sensor Type RVD - RVD Number of voltage sensors per recloser - 03/06 Accuracy - 3% Additional data Insulation media - Solid insulation (HCEP) Minimum external creepage distance Minimum external creepage distance - As per OEM recommendation Pollution level (IEC 60815) - As per OEM recommendation Phase to phase clearance - As per OEM recommendation Minimum external arcing (strike) distance - 252mm Interrupting media - Vacuum Type of mechanism Bi-stable magnetic actuator-Bi-stable magnetic actuator Ingress protection for cabinets - IP 55 Service conditions Ambient temperature range - -40 to +55 °C Maximum humidity - 100% Altitude - 3000m

Mounting of Auto Reclosure The operating mechanism of the recloser should be housed inside a stainless steel, painted cabinet with IP55 rating. The recloser mounting frame shall be suitable for single/double pole or in a substation type of configuration. The mounting frame shall include the facility to mount six surge arresters. Maintenance-free, bi-stable magnetic actuator should provide the required force to open and close the vacuum interrupters. The use of a HV solenoid is not acceptable.

Mechanism 1. The mechanism shall utilize bi-stable direct drive magnetic actuator capable of fast opening and closing operations with a 0.2 second delay. Bi-stable here means that, no operating power is required to hold the unit open or closed. A rechargeable lead acid battery in combination with a tripping capacitor, allowing fast multiple open-closed-open operations, must power the magnetic actuator. Minimum reclose delay time on first reclose shall not exceed 0.2 seconds. The second and third reclosing delay time shall be programmable from 2 seconds onward. 2. Design shall permit multiple operations after loss of primary control voltage to allow dead line operation. 3. The capability of mechanism to perform the operating cycle of O-0.2s-CO-2s-CO-2s-CO should be confirmed by performing the type test of mechanical endurance, and rated symmetrical interrupting current tests as per IEC 62271-111. IEEE C37.60 Edition 2.0 2012-09 (Dual Logo Standard)

Vacuum Interrupters Current interruption shall occur in vacuum interrupters, providing minimum and even contact wear, long life, and maximum reliability. The vacuum interrupters should be of the same make as autorecloser.

Voltage and Current Sensing 1. Suitable current and voltage sensor shall be provided on each phase of the recloser. Output from these sensors is to be sent to the control for indicative measurement for protection, instrumentation and metering. 2. The current sensors shall be current transformers having 600/1 ratio and shall be able to measure current from a range of 2% to 1,000% of rated current. This is necessary to monitor fault duty on the interrupters, and to provide proper oscillographic data. 3. The CTs shall not get damaged or open circuited by disconnecting the control cable from an energized recloser.

Construction of auto reclosure 1. The operating mechanism of the recloser should be housed inside a stainless steel, painted cabinet with IP55 rating. 2. Maintenance-free, bi-stable magnetic actuator should provide the required force to open and close the vacuum interrupters. The use of a HV solenoid is not acceptable. 3. The solid dielectric, hydrophobic cycloaliphatic epoxy (HCEP) material is preferred as the insulating material as it is shatter-resistant and is proven for superior performance in outdoor applications. SF6 gas or oil is not acceptable for interruption or insulation purposes. 4. The recloser shall be designed for 10,000 mechanical or load break (630 A) open/close operations. 5. Provisions shall be included to manual trip the recloser in case of emergency situation. The operating person should be able to easily do the manual tripping by the use of insulated hook stick. When the recloser is manually tripped, an mechanical interlock should get initiated which will block the closing of recloser electrically as well as mechanically to ensure safety of the operating person as well as the system. A separate mechanical resetting lever on the HV cabinet should be provided to reset the interlock. 6. The recloser should have suitable current and voltage sensors to provide protection functions and indicative metering. 7. Operating temperature range shall be -40 degree C to +50 degree C 8. Each pole of the recloser shall be identical to allow complete replacement of any individual pole, without disassembly or replacement of the other poles. All parts must be field replaceable.

Control Cable 1. The recloser is to be supplied with a 9m control cable interface from the recloser to the control cabinet. 2. The control cable must be supplied with a sufficient number of conductors to accommodate current and voltage sensing wiring to the electronic control (note: recloser voltage sensors do not provide control power to the relay).

Control Cabinet Construction 1. The control cabinet should be of stainless steel and should have door handle with three-point latch. 2. The control cabinet must be of sufficient size to accommodate the addition of a radio, modem, PLC, or customer SCADA wiring.

Battery Backup/UPS 1. Control power for the recloser shall be supplied by an external voltage transformer (VT). Supply of auxiliary voltage transformer shall be purchaser’s scope. 2. The control cabinet is to include battery pack of sealed lead acid batteries, capable of providing up to 24-hours of carryover upon loss of AC source power. During this maximum 24-hour period, the batteries shall be capable of providing up to 100 open and close operations. 3. The batteries must be charged by a temperature compensated charging circuit, allowing the battery to charge at an optimal rate, extending battery life. 4. The battery charger must be an integral component in the control cabinet. Battery health indication should be available for mapping with SCADA. 5. The unit shall be capable of periodic automatic battery tests. 6. The integrated uninterruptible power supply (UPS) shall operate over the range: 110 or 240 VAC

Notes :- 1. Contractor must visit site befor quoting the rate 2. Galvanised MS angles, cross arms PCC foundation and accesoories shall be provided by the contractor for mounting of auto reclosure on and control relay unit on existing 2/4 pole structure all as specified by eng-in-charge 3.Approximate weight of Auto reclosure is around 400 kgs 4.Contractor will be responsible for any defect up to one year after installation of autoreclosure without any additional cost 5.Contractor has to arrange factory visit of MES rep appointed by Accepting officer. 6.Contractor has to submit following Test certificate of following type testing before claiming RAR

Following type test shall be successfully conducted on the recloser as per IEC 62271-111(2012) / IEEE C37.60 Edition 2.0 2012-09 (Dual Logo Standard). Test to be conducted 1. Dielectric (insulation) tests 2. Measurement of the resistance of circuits 3. Temperature-rise tests 4. Short time withstand current and peak withstand current tests 5. Verification of the protection 6. Electromagnetic compatibility tests (EMC) 7. Line charging current and cable charging current interruption tests 8. Making current capability 9. Rated symmetrical interrupting current tests 10. Minimum tripping current tests 11. Partial discharge (corona) tests 12. Time-current tests 13. Mechanical duty test 14. Control electronic elements surge withstand capability (SWC) tests The capability of the offered recloser should be confirmed by performing the type tests ‘Rated symmetrical interrupting current tests’ and ‘Mechanical duty test’ with the operating cycle of O-0.2s-CO-2s-CO-2s-CO as per IEC 62271-111. IEEE C37.60 Edition 2.0 2012-09 (Dual Logo Standard).Test conducted as per any other standard, OR with different operating cycle having longer reclosing delays or not meeting parameters stated by the standard will not be considered for evaluation.

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