Switzerland – Electricity, heating, solar and nuclear energy – NCK Engineering / Stadtwerke Wetzikon: Mittelspannungsanlage

Subject of the tender: Supply and installation of a medium-voltage system (Zürcherstrasse, 8620 Wetzikon) in accordance with the applicable standards and regulations of the StV (Electricity Supply Ordinance) and the specifications of Stadtwerke Wetzikon. Accessories and operating materials, transport and installation work on site, documentation and labeling. System configuration and standards -Operating conditions according to IEC 62271-200 -Switchgear according to IEC 62271-200 -Circuit breaker according to IEC 62271-100 -Isolator according to IEC 62271-103 -Earthing switch according to IEC 62271-102 -Current transformer according to IEC 61869-2 -Operational availability according to IEC 62271-200 (LSC 2A) -Arc fault classification IAC A FLR 21 kA/1s -Protection class PM -Regulations: Strict compliance with NIV, NIN, StV, ESTI guidelines and works regulations of Stadtwerke Wetzikon. Electrical rating data -Voltage: Rated voltage 24kV (operation 16kV), BIL 125kV -Power: Busbar 630A, short-circuit strength 25kA (3s) -Auxiliary voltage: Control and tripping via 48 V DC Components & Scope -Switchgear: 11 panels (A1-A11, incl. circuit breaker, measurement, coupling). -Protection: Installation and parameterization of protective relays -Measurement: Transformer (current/voltage) incl. factory calibration and on-site installation. -Documentation: Complete documentation for ESTI input, test protocols and declarations of conformity. Installation & Documentation -Specialist personnel: The delivery and installation may only be carried out by authorized personnel with proof of the relevant certificates. -Documentation scope: Complete documentation for ESTI input, declarations of conformity, calibration certificates, test protocols of the transformers and protective devices as well as maintenance plans.