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UNA MVA (15 kV mobile Switchgear in Transportable Kiosk)

BASIC CHARACTERISTICS OF UNA-MVA

Compactness
Sturdy Construction with welded metal structures.
Suitable for outdoor installation.
Dimensions and weight suitable for normal road transport.
Very Rapid Installation, since no special civil works are required.
Almost immediate putting into service since all apparatus is pre-cabled and pre-tested in ASIAPHIL Factory.
Suitable protection Devices, preset to allow personnel to operate in maximum Safety.
Constructed using a 1 x 20 footer container complete with heat insulation, panel door and glass window.

DIMENSION AND WEIGHT

6096mm (20’)L x 2438.4mm (8’)W x 2621mm (8.6’)H
4-5 tons

SURFACE FINISH OF CONTAINER
Paint consisting of (a) coat of inorganic zinc primer; (b) middle coat of epoxy paint; (c) top coat of polyurethane paint.

AUXILIARY INSTALLATION
The following auxiliary installations are supplied for convenience and desired application of personnel.

Installation of Internal and external lighting systems
Installation of 220V convenience outlets suitably distributed for use of personnel

MEDIUM VOLTAGE SWITCHGEAR
Is routine engineered to ensure a safe and easy operation either when energized or when transit. The following safety features are considered:

Transit in paved roads with a speed of up to or at least 60kph.
Possible to be successfully tilted in transit up to 20 degree without the danger of overturning.
All equipment will withstand strains and solicitations due to normal road vibrations.
Possible to be energized and operated with an out-of-level until 5 degree.
Protection and control switchboards safety placed, allowing easy operation and
maintenance.

Shall house the following components as follows:

1 Assembly 15 KV MEDIUM VOLTAGE SWITCHGEAR(4 Feeders)
Type		Free-standing, Indoor
Voltage		13.2kv, 3 phase, 60Hz
Control Volt		240 Vac
Enclosure		Medium Voltage switchgear for indoor use, type one high, made from B.I. steel sheet Gauge #12 for the structure and Ga#14 for the covers and panels. All doors shall be gasketed neoprene type. The Versa modular MV switchgear enclosure design shall be bolted together to form a rigid and stable structure. The enclosure shall be in accordance with IEC649/IEC298 with equivalent ANSI C37.20.2, indoor application.
Paint		The enclosure shall be clean with the advance metal Treatment process (degreasing, derusting, metal, conditioning and zinc phosphating). Powder coated, Oven baked for indoor use.
Dimension		2100mm H x 1700mm D x 800mm W approx.
Quantity		3 Vertical Section

The enclosure shall house the following components as follows:
Vertical Section # 1: (Station Service Transformer)
1 unit		Station Service Transformer, Oil Immersed rated 10kVA, single phase, 60 Hz., 7620/120-240Vac
1 unit		Transformer Differential Relay (87T)
3 units		Potential transformer 13.2kV/240-120Vac, 70:1, 60Hz, 1-phase with primary CLF fuses, ANSI metering accuracy.
9 pcs		Current Transformer rated 600:5A, Torroidal type, metering and elaying accuracy.
1 set		Overcurrent & Ground Fault, Instant/Inverse Time Delay Relay (50/51/50N/51N) (protection for 69kV SF6 CB)
1 pc		Digital Multi-meter capable of indicating voltage, power (kw, kvar, kva), energy, current, power factor, frequency, harmonics etc.
1 pc		Thermostat control switch, 60 - 250 degrees F, 240Vac
1 pc		Space heater, 300W, 240Vac
1 set		Lighting fixtures, 20W, 220Vac including limit switch
1 set		AC/DC Panel with 1 main and 6 branches.
1 set		Battery Bank, 125Vdc, 60AH, station type, 2V/cell

Vertical Section # 2 & 3 (Outgoing Feeder)
4 units		SF6 Circuit Breaker, rated 630A, 15kv, short circuit 25ka interrupting capacity, for indoor installation, fixed type, electrically and manually operated complete with motor spring charge and shunt trip, control voltage 240Vac, 2NO-2NC auxiliary contacts with standard accessories i.e. Manual Spring Charging Lever.
4 sets		Overcurrent & Ground Fault, Instant/Inverse Time Delay Relay (50/51/50N/51N)
4 pcs		Digital Multi-meter capable of indicating voltage, power (kw, kvar, kva), energy, current, power factor, frequency, harmonics etc. 24 pcs Current Transformer rated 300:5A, Torroidal type, metering and relaying accuracy.
4 pcs		Circuit Breaker Control Switch
12 pcs		Lightning Arrester, Distribution type, 10kv.
4 pcs		Thermostat control switch, 60 - 250 degrees F, 240Vac
4 pcs		Space heater, 300W, 240Vac
4 sets		Lighting fixtures, 20W, 240Vac including limit switch
4 sets		CTT / PTT, 10 pts.

INSTALLATION

Installation operations on site of the 15kV Mobile Switchgear are reduced to a minimum and putting into service can be carried out very rapidly.
The space required for positioning the UNA-MVA can be limited to the area corresponding to the container dimension plus a perimetrical corridor to allow opening of panel door and windows and clearance for people to pass by.
After having placed the UNA-MVA on site and positioned it on its respective foundation the following operations must be carried out:
- Connect the container to the main earthing system
- Lay the MV cables , from the secondary of the transformer, on the ground and, connect them to the incoming and outgoing cubicles of the MV Switchboard.
At this point after the necessary controls are checked and no on site connection errors, the UNA-MVA is now ready to be put on service.