Meralco Power Up Electrical Design Standards PDF

MERALCO Standards: Electrical Design Engr. Eduard Mercado Electrical Design Team Electrical Design Standards SERVICE VOLTAGES SECONDARY METERED - 240 V, 400 V, 460 V PRIMARY METERING -34.5 kV, 13.8 kV (portions of Cavite & Bulacan), 115 kV (Subtransmission) FACILI...

MERALCO Standards: Electrical Design Engr. Eduard Mercado Electrical Design Team Electrical Design Standards SERVICE VOLTAGES SECONDARY METERED - 240 V, 400 V, 460 V PRIMARY METERING -34.5 kV, 13.8 kV (portions of Cavite & Bulacan), 115 kV (Subtransmission) FACILITIES 1. OVERHEAD POLE MOUNTED TRANSFORMERS PADMOUNT TRANSFORMERS VAULT TYPE DT 2. UNDERGROUND PADMOUNT TRANSFORMERS VAULT TYPE DT Single Line INCOMING OVERHEAD LINE Diagram TERMINAL SURGE POLE ARRESTER FUSE CUTOUT OR POWER FUSE CABLE ALL CIVIL WORKS, i.e., TERMINATION CONCRETE-ENCASED PVC DUCTS & FITTINGS, TO BE UNDERGROUND PROVIDED AND INSTALLED BY PRIMARY THE APPLICANT/CUSTOMER CABLES ELBOW ARRESTER PADMOUNTED TRANSFORMER VAULT TRANSFORMER TO BE CONSTRUCTED BY THE APPLICANT/CUSTOMER BASED ON MERALCO STANDARD CT SECONDARY EPMC CABLES METER TO CUSTOMER’S MAIN SECONDARY CIRCUIT BREAKER OVERHEAD LINE FEEDING A TRANSFORMER VAULT Single Line UNDERGROUND FEEDER Diagram PADMOUNTED SWITCHGEAR ALL CIVIL WORKS, i.e., CONCRETE-ENCASED PVC UNDERGROUND DUCTS & FITTINGS, TO BE PRIMARY PROVIDED AND INSTALLED BY CABLES THE APPLICANT/CUSTOMER ELBOW ARRESTER PADMOUNTED TRANSFORMER TRANSFORMER VAULT TO BE CONSTRUCTED BY THE APPLICANT/CUSTOMER BASED ON MERALCO STANDARD CT EPMC SECONDARY CABLES METER TO CUSTOMER’S MAIN SECONDARY CIRCUIT BREAKER UNDERGROUND LINE FEEDING A TRANSFORMER VAULT  34.5 kV OH Line Lightning Fuse Cut-Out Arrester or Power Fuse 4-Way Loadbreak Junction, 200A Transformer Vault PRIMARY Vault Elbow Type Arrester DT's (SEE SECONDARY NOTE) Load Load Single Line Diagram - 2 Banks w/ 4-Way Junction 4-WAY / 4-POINT JUNCTION Transformers for Vault Installation Meralco-Supplied Padmounted Transformers  Three-phase, 34.5 GrdY/20 kV or 13.2 GrdY/7.62 kV  Available in either 240Y/139-V secondary (75-1000 kVA) or 480Y/277-V secondary (500-2000 kVA)  416Y/240 V secondary (500-1000 kVA) Transformers for Vault Installation Meralco-Supplied Padmounted Transformers  Deadfront primary  Less flammable liquid filled  Completely self- protected with fuses  Provided with loop sectionalizing switch Transformers for Vault Installation Meralco-Supplied Deadfront Distribution Transformer  Single-phase, 34.5 GrdY/20 kV or 13.2 GrdY/7.62 kV  Available in either 139/277-V secondary or 240/120-V secondary  Available in 167 – 333 kVA Transformers for Vault Installation Meralco-Supplied Deadfront Distribution Transformer  Deadfront primary  Round tank construction  Less flammable liquid filled  Provided with standard DT accessories Standard Vault Location PREFERRED VAULT LOCATION: PREFERRED VAULT LOCATION SHALL BE ON THE GROUND FLOOR SECOND FLOOR MAY BE ALLOWED (FOR VAULT TYPE DT’s AND PADMOUNTED XF WITH HOISTING FACILITIES) FIRST BASEMENT MAY BE ALLOWED FOR BUILDINGS WITH MULTIPLE BASEMENT PREFERRED VAULT LOCATION: THE VAULT SHALL BE LOCATED ON PERIMETER OF THE BUILDING ADJACENT TO STREET/ROADWAY ACCESSIBLE TO MERALCO TRUCKS AND CRANE TRUCK MINIMUM ROAD WIDTH : 6.5 METERS  Standard Vault Specifications/Requirements STANDARD SPECIFICATION/ REQUIREMENTS: WALLS AND ROOF SHALL BE MADE OF REINFORCED CONCRETE NOT LESS THAN 150MM THERE SHALL BE NO OPENING FROM THE VAULT TO ANY PART OF THE BUILDING INTERIOR 150 MM DOORSILL IS REQUIRED FOR LIQUID CONFINEMENT PROVISION FOR ADEQUATE AND PERMANENT VENTILATION (EXHAUST FAN-TEMP CONTROLLED RATED ¾ HP, 71 CuM/Min (2500 CFM)) CLEAR HEADROOM SHALL NOT BE LESS THAN 4M FROM THE BOTTOM OF THE I-BEAM TO MAINTAIN A 30°SLING ANGLE FROM THE VERTICAL (HOISTING FACILITY) STANDARD SPECIFICATION/ REQUIREMENTS: DUCTS (PRIMARY AND SECONDARY) – 110 MM DIAMETER, THICK WALLED, RED ORANGE COLOR, UNPLASTICIZED POLYVINYL CHLORIDE (UPVC) IN ACCORDANCE WITH PNS 14. IT SHOULD BE ENCASED IN CONCRETE PROVISION OF PERSONNEL ACCESS DOORWAY DIRECTLY ACCESSIBLE FROM OUTSIDE OF THE BUILDING Customer Vault Layouts for Transformers (pdt & vt) Requirements for Customer Vault MINIMUM DIMENSION PADMOUNT TRANSFORMER IN VAULT LOCATION 1-BANK 2-BANKS (W) 5m X (D) 4m (W) 8m X (D) 4m Ground Floor X (H) 3m X (H) 3m (W) 5m X (D) 6m (W) 8m X (D) 6m 2nd Floor X (H) 4m* X (H) 4m* (W) 5m X (D) 6m (W) 8m X (D) 6m 1st Basement X (H) 3m X (H) 3m NOTES: W = Width; D = Depth; H = Height (Headroom) * 4m vertical distance measured from the bottom of the I-beam to the floor is required when hoisting the transformer EXCEPTION: For 2nd floor transformer vault with a hatchway, the depth requirement is 8m. Requirements for Customer Vault MINIMUM DIMENSION DEADFRONT (VAULT TYPE) DISTRIBUTION TRANSFORMERS LOCATION 1-BANK 2-BANKS (W) 5m X (D) 4m (W) 6m X (D) 6m Ground Floor x (H) 3m X (H) 3m (W) 5m X (D) 4m (W) 6m X (D) 6m 2nd Floor x (H) 3m X (H) 3m (W) 5m X (D) 4m (W) 6m X (D) 6m 1st Basement x (H) 3m X (H) 3m NOTE: W = Width; D = Depth; H = Height (Headroom) PRIMARY METERING SINGLE LINE DIAGRAM FOR PRIMARY METERING (OH) SINGLE LINE DIAGRAM FOR PRIMARY METERING (UG) TYPICAL PRIMARY METERING ARRANGEMENT 3 Way RMU with Metering Module 3 Way RMU with Metering Module Thank you.