| 1 | Supply, installation, testing and commissioning 11 KV, 630 Amps, outdoor type Compact switch gear Ring Main unit Main Copper Bus bar SF6 Insulation are inside SF6 Gas tank, Nominal operating gas pressure 1.4 Bar abs, Extensible type, having 02 Nos. Load Break Switches and 01 No Vacuum circuit breaker, (2LBS + 1VCB) all Manual Operated modules with IP class as IP 54, for outer door separately , inside the RMU there shall be an additional cable door with IP3X and Mimic of IP2X and necessary PCC foundation work as per manufacturer's instructions, along with bottom cable entry and front cable termination complete all as specified and as directed with following accessories. & specification RMU switchgear shall be capable of withstanding the specified currents without damage in accordance with the latest versions of IEC 60694 specified including metering module with following specifications complete. Location : MRS
Make : CG/ABB/siemens/Schnieder . | 1.00 | Each Job |
| 2 | (i) 630A manual VCB module for making & breaking of fault current along with Earth Switch of full breaking capacity -1 No
Manual operated 630 A Vacuum circuit breaker having spring stored mechanism.
(ii)Three position disconnector/earthing switch downstream vacuum circuit-breaker.
Three position single spring mechanism for disconnector/earthing switch
Live Cable LED Indicators thru Capacitor Voltage Dividers mounted on the bushings.
(iii) Short time breaking current - 21KA/ 3 sec
(iv) Breaking Capacity - 50 KApeak at rated Voltage
(v) Auxiliary contacts - 1NO + 1NC
(vi) Power frequency withstand voltage to Earth between Poles & Across opening span - 28KVrms
(vii) Impulse withstand voltage Phase to Phase & Phase to Earth - 75kVp
(viii) Front cover mechanism - IP2X
(ix) Cable covers - 3X
(x) Green(ON)/Red(OFF) push buttons to operate VCB.
(xi) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault.
(xii) Mechanical ON/OFF/EARTH/Spring charge Indication
(xiii) Cable boxes should be Arc Proof interlocked with respective Earthing Switches.
(xiv) Right angle non-touch proof Termination boots - 1 Set (R,Y,B)
The degree of protection required against prevailing environmental conditions, including splashing water and dust, shall be not less than IP 54 as per IS12063
Min no. of operations of Circuit breakers at rated current (as per IEC 62271-
100) shall be guaranteed with Mechanical Endurance Class M1 (2000operations).
Stored energy mech. for manual operation - 01 Nos
Set of 03nos. Ring Core Protection CTs of ratio 40-80A/1A as per feeder load, 2.5VA, 10P10 - 01 Set
Capacitive voltage indication fixed type VPIS 6-12 kV - 01 Nos
R-Y-B Phase Indication
Set of Coupling bus bars along with suitable coupling kit.- 01 Nos
Manometer- 01 Nos
Operating handle - 01 Nos
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| 3 | Material: Epoxy resin cast/ Tape wound
- Burden: 2.5VA
- Ratio: 200-100-50 /1A
- Accuracy Class:0.5
NOTE
(a) RMU Tank shall be IAC AFL 20kA/1s tested to ensure utmost operator safety .Test report (from an STL member Lab) shall be submitted along with drawings of the RMUs . In case the test report is not found suitable , the RMU shall stand liable to be rejected.
(b) The Vacuum Bottle shall be of same make as that of RMU to ensure better life cycle optimization for the RMU.
(c) Additional items like Operating handle etc. shall be delivered with the RMU
(d) RMU tank shall be of 304 grade, Non-magnetic, Non-ferrite Stainless Steel. Inferior Grade of Steel shall not be acceptable.
(e) RMU shall have site replaceable bushings for ease of trouble shooting at site and quick repair and restoration at site.
(f) Bus bar to be copper material.
(g) Insulation of bus bar to be epoxy or PVC Sleeved insulation to be provided.
(h) The Quoted rates for RMU shall be inclusive of making Platform as per OEM instructions, made with bricks and necessary PCC at Bottom and Top and plastering complete all as directed.
(j) Metering Module | | |
| 4 | Supply of HT 11KV, 3Phase 50Hz, totally metal clad switchgear complete with withdrawable type Vacuum Circuit Breaker OUTGOING having rapturing capacity 250 MVA panel with Copper bus bar of suitable rating, horizontal isolation type VCB of capacity minimum 400 Amps rated current, as per IEC 62271-100-200.The switchgear panel shall be of sheet steel construction with ALUZINC with not less than 2.5mm thickness for load bearing section and not less than 2 mm thickness for non-load bearing and shall be totally dust and vermin proof including necessary arrangement/alteration to connect with existing VCB.The offered panels shall be tested for IAC level of 25kA/1 Sec., No. of operation of Vacuum Interrupter Bottles (CG/ABB/Siemens/ Schneider only) for better performance: (i) Mechanical life -30,000 ,
(ii) Rated Current 10,000 &
(iii) Rated Short Circuit Current 100 nos.
(iv) Relays Make CG Model No CGI 14C.
Panel and VCB parameters are as below:-
(i) Rated Voltage level/ PF withstand voltage/ Impulse level:11KV/ 28kV/ 75 kVp
(ii) Continuous current rating: minimum 400A
(iii) Short circuit withstand current: minimum 25KA for 3sec.
(iv) One no. minimum 400 Amps horizontal draw out type vacuum circuit breaker in 11KV metal clad floor mounting panel complete with following:-
(a)Manually & Motor operated(230V,AC,50Hz) spring charged type, manually and electrically open (electrical 110 VDC) operation type, incorporating mechanical as well as electrical ON/OFF indication "OFF" push button, test/service position limit switches, with minimum 6NO+6NC breaker auxiliary contacts in service position.
| 1.00 | Each |
| 5 | (b) Cast resin Current transformer 11KV, **/5-5A, Core1: class1, 15VA for 3 phase , Core2: 5P10, 15VA,
(A) Protection arrangements for the breaker shall comprise of the following:
i) E/F, O/C, S/C, TCS with MODBUS protocol.
ii) Relay should have mimic display
iii) Complete with Master Trip/ Anti pumping relay.
iv) Auxillary Relay Alarm/Trip.
(B) The following meters, indications and accessories are to be provided with the panel:-
(i) Digital Voltmeter range 0-11KV with necessary voltmeter with built in selector switch & suitable for 110V AC 96X96 sq mm dial with shrouded terminal.
(ii) Digital Ammeter range of applicable range with necessary ammeter with built in selector switch dual graduated scale 96X96 sq mm dial with shrouded terminal.
(iii) Multi-Function meter (6400NG)
(iv) Necessary DC supply, healthy indication lamp & switch.
(v) Control:
(a)TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement,
(b) Local/Remote selector switch for breaker open/close operations.
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