stelmec® P RODU S PO ER boundaries CT W beyond Catalogue RMU.02.2018 SRMP12 12kV, 21kA, SF6 GAS INSULATED RING MAIN UNIT Ring Main Unit is a compact unit to connect, supply and protect transformers on a radial or an open ring power network. The primary function of RMU includes detecting electrical fault and breaking fault currents as required. RMU offers various advantages in terms of compact size , minimal maintenance, high product quality with reliable operation, ease in installation, independent to environmental conditions, reduced operating cost and better personal safety. Salient Features High Degree of Reliability and Safety Virtually Maintenance Free Suitable for Indoor and Outdoor Application Reduced Total Cost Considering Space Requirement Compatible for Manual and Motorized Remote/SCADA Operation Conforms to IEC 6227-100 / 102 / 103 / 200 & IEC 62271-1 / IS 13118 Arc Interruption in Vacuum and SF6 Gas for Insulation RMU is Designed for Internal Arc Classification for 12kV, 21kA IAC AFLR for 0.1 & 1 sec Manual and Motorized Three Position Load Break Switch and Off-load Dis-connector cum Earth switch All Safety Interlocks are provided Extensible on Both LH & RH Side (optional) Application Utility Distribution Networks Offices, Hotel Buildings and Other Commercial Establishment Contaminated or Polluted Areas Underground Substations Railways & Airports Small Industries and Solar Power Plant SRMP12 12kV, 21kA, SF6 GAS INSULATED RING MAIN UNIT Technical Specifications Parameters Unit SRMP12 Rated Voltage kV 12 Rated Frequency Hz 50/60 Rated Main Bus Bar Current A 630 Rated Feeder Current A 630 Rated Insulation Level* kV 12/28/75 & 12/38/95 VCB, LBS and ES Rated Short Time Current for 3 sec kA 21 Rated Active Load Breaking Current to the LBS A 630 Rated Short-Circuit Breaking Current of the Vacuum Circuit Breaker kA 21 Rated Short-Circuit Making Current of the VCB/LBS kA 52.5 Rated Operating Sequence for VCB O-0.35-CO-3M-CO Insulating Gas System Insulating Gas SF6 Minimum Gas Pressure Level For Insulation Bar 0.2 G Rated Gas Filling Pressure Level For Insulation Bar 0.4 G Lock Out Pressure Bar 0.2 G Degree of Protection Gas Filled Compartment IP 67 Enclosure IP 55 Panel Overall Dimensions Height (H) mm 2100 Width (W) mm 1044* Depth (D) mm 820 Applied standard IEC 62271-200 *Width would vary as per no. of variants. C C V 3 WAY RMU:- CCV FRONT VIEW SIDE VIEW Typical G.A Drawing for Ring Main Unit Panel There is a continuous effort at Stelmec to keep abreast of latest technology in line with customers’ requirements and hence the product specifications are subject to change. Products described in this catalogue are manufactured and supplied according to Certified Management System ISO 9001:2015. stelmec beyond boundaries SBU – I (Medium Voltage Switchgear Division – I) CORPORATE ® Plot No. 52 to 62, Off Ahmedabad-Sanand Road, Ularia, Tal. Sanand, Dist. Ahmedabad - 382 110 Tel: +91 9909040321 / 22 / 24 / 25 Email: marketing.ahd@stelmec.com 'Sea Queen', 43-A, H.K. Bhabha Road, Bandstand, Bandra (W), Mumbai - 400 050 Tel: +91 22 2643 6127 / 28 / 29 E-mail: corporate@stelmec.com website: www.stelmec.com
