Tariff Metering s 5kd5j

5.8 MGD Seawater Desalination Project Tender Enquiry Document for 110 kV Switchyard

SECTION – B1.12 TARIFF METERING S 1.0.0

EQUIPMENT TO BE SUPPLIED

1.1.0

Two (2) nos. tariff metering s (one each for main tariff metering & check tariff metering) for two transformer bays as indicated in 110 kV SLD (Drg no. 20-6104-E-202).

2.0.0

TECHNICAL REQUIREMENT

2.1.0

Tariff metering with metering equipment shall be installed in the switchyard control room. One each shall be provided for main metering & check metering.

2.2.0

The main metering equipment & check metering equipment consists of tri-vector meter (import). The tri-vector meters shall be of digital type with class 0.2 accuracy.

2.3.0

The tri-vector meters shall have facility for storing information like maximum demand, power factor, frequency, Billing s of all energy quantities etc. as 15 minute block for a minimum period of 15 days.

2.4.0

Separate tariff meter shall be provided for each transformer feeder (2 nos.). The tariff meter shall as a minimum suitable for reading the following parameters : i) ii) iii) iv) v)

Kilo watt hour Kilo VAR hour Kilo volt ampere hour Kilo watt, Kilo VAR & KVA along with maximum demand over a period of time. Power factor, frequency along with maximum / minimum readings over a period of time.

2.5.0

The Kilo watt hour & kilo VAR hour metering shall be suitable for single or two rate tariff. Thus they shall be equipped with separate s for high tariff and low tariff. Each shall comprise of a 6 digit cyclometer type indicator. The time for change in tariff shall be signalled from two time clocks (main & stand by).

2.6.0

Two nos. time clocks shall be provided for switching purpose (main & standby clocks). The time clocks shall be suitable for operation from 110V DC supply. The clock shall be provided for switching tariff changes, peak demand recording periods and for resetting demand indicators & printometers at predetermined time intervals. Adjustment shall be possible to cover tariff changes during different periods over 24 hrs. A selector switch shall be provided to change from main to standby clock.

2.7.0

The demand metering shall be able to measure the demand of individual parameter at any point of time along with the maximum demand ed over a preset period of time which will be reset after the preset time has elapsed.

2.8.0

Tariff meter for each outgoing feeder shall have a serial port suitable for Ethernet protocol, which permits direct transfer of data between an ethernet network and 12 such devices via another serial port. In addition each tariff meter shall be provided with an internal modem. It shall be possible for 12 such devices to communicate over telephone network through a serial port.

P2Sec B1-Swyd

FICHTNER India

Doc. No.6104-EL-SPC-610-001 Rev. : R0 Page : B1 : 44

5.8 MGD Seawater Desalination Project Tender Enquiry Document for 110 kV Switchyard

2.9.0

Tri-vector meters shall be installed in IP-42 s of cold rolled sheet steel thickness not less than 2 mm. The s shall have undergone degreasing, rust / scale removal, phosphating sand blasting & oven drying process. The phosphate coating shall be sealed by the application of two coats of ready mix stoving type zinc chromate premier followed by two coats of synthetic enamel paint. The shall be suitable for bottom entry front access only.

2.10.0 All equipment on the front shall be flush mounted. 2.11.0 The shall be complete with door limit switch operated cubicle lighting, 5A switched power socket, hygrostat controlled space heater, terminal block, earth bus, body earth pads etc. 2.12.0 All wiring shall be carried out with 600 / 1000V grade stranded 1.5 sq. mm copper conductor wires with PVC insulation. For CT & VT circuits 2.5 sq. mm copper conductor wire with PVC insulation shall be used 2.13.0 Terminal blocks shall be klipon type 600V grade, 10 Amps rated stud type terminals with markings. Terminals for VTs secondary leads shall be stud, disconnecting type. CT secondary leads shall be provided with short circuiting and earthing facility. A clearance of 250 mm (min.) shall be maintained between terminal blocks and gland plate and 150 mm between 2 rows of terminal blocks for ease in termination. At least 20% spare terminals shall be provided. 2.14.0 All accessories & instruments shall be connected to the earth bus through a 2.5 mm² Cu conductor, PVC sheathed earth cable. 3.0.0

TESTS The tariff metering s shall be subject to following tests as per relevant standards : a) b) c) d)

4.0.0

Meters caliberation test High voltage test (2 kV for 1 mt) Megger test Verification of wiring as per approved drawings

AFTER AWARD OF CONTRACT FOR APPROVAL a) b) c) d) e)

P2Sec B1-Swyd

general arrangement drawing Scheme drawing Wiring drawing Catalogues of the meters / accessories Operation & maintenance manual

FICHTNER India

Doc. No.6104-EL-SPC-610-001 Rev. : R0 Page : B1 : 45