Catalogue for MVSB

8/15/2019 Catalogue for MVSB

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Medium Voltage (HMS-112)

METAL-CLAD SWITCHGEAR


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GENERAL

DESIGN CONCEPT

APPLICABLE STANDARDS

HMS switchgears comply with the following international standards.

- IEC 60298 and 60694

-Classification of ships.

Hyundai medium voltage metal-clad switchgear HMS-112 with a

drawable circuit breaker truck are of one-tier, factory-assembled

and suitable for rated voltage of 7.2kV to 12kV.

The switchgears have been type tested in accordance with related

IEC regulation.

HMS switchgears have been designed and manufactured on the

basis of our quality assurance program ensuring ;

- Maximum safety and reliability

- Minimum maintenance, all parts easily accessible

- Ease of installation

- Simplified but flexible design

HMS 112 HYUNDAI METAL CLAD SWITCHGEAR

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PROTECTION DEGREE

SERVICE CONDITION

Same as IP42, but dust protection is added.(Ingress ofdust is not totally prevented, but dust shall not penetrate

in a quantity to interfere with satisfactory operation)

Recommended for coal mine plants.

IP2X

IP4X

IP42

IP52

Hyundai’s switchgears are intended for use under the normal indoor service

condition and special service condition.

Normal indoor service condition.

- Ambient temperature : 35℃ maximum 24 hour mean.

40 ℃ maximum value.

- Altitude : not to exceed 1000M sea level.

- Relative humidity : 95% maximum 24 hours average.

90% maximum one month average.

The protection degrees for standard switchgear are as follows.The other degrees such as IP42, IP52 are also available on request.

- Protection degree for the switchgear enclosure : IP4X

- Protection degree for the internal partition : IP2X

DEGREE DES RIPTION OF PROTE TION

Protection against access to hazardous parts with finger

or solid foreign objects of diameter greater than 12mm.No specification against water.

DESCRIPTION OF PROTECTION DEGREE

Protection against access to hazardous parts with wires

of diameter or strips of thickness greater than 1.0mm.

No specification against water.

Recommended for power plants, offshore plants,

substation and industrial plants.

Same as IP4X, but protection against drops water when

case in tilted up to 15˚ is added.


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ENCLOSURE

FINISH

The enclosure of the switchgear is cleaned, rust proofed and painted in

accordance with Hyundai’s standard electrostatic powder coating

procedure.

The average thickness of painted finish is 60 microns and above.Standard finish colours are Munsell no. 7.5BG 7/2 and RAL6018.

The rigid enclosures of the switchgear consist of steel sheets with folded

edges bolted together.

The use of CNC machine and FMS(Flexible Manufacturing System)

enables high accuracy of dimension, thus facilitating best quality and

installation saving at site.

Special service condition

Following conditions are considered as special service condition.

- Different value other than specified in normal indoor service conditions.

- Outdoor service

- Heavy vibration or shocks

- Hazardous area

- Seismic requirements

The standard thickness of steel plate are as follows

- Frame

- Front door

- Rear door(or plate)- Bottom plate

- Others

2.3mm

3.2mm

2.3mm2.3mm – 3.2mm

1.6mm and above


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NAME PLATE

ROUTINE TEST

The routine tests are conducted with each unit at Hyundai’s factory to

ensure that the switchgears are in accordance with the requirements.

- Power-frequency voltage test on main circuit

- Power-frequency voltage test on auxiliary and control circuit

- Measurement for resistance for the main circuit

- Test of auxiliary electrical devices

- Verification of correct wiring

Material : Laminated plastic, 2.0t (Black background)

Fixing Method : PVC locker(Sealer)


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CONSTRUCTION

E. PT & EARTHING SWITCH COMPARTMENT

14. Shaft for earthing switch

15. Potential transformer

16. Motor mechanism for earthing switch

17.Pressure-release flap

C. BUSBAR COMPARTMENT

6. Main busbar

7. Fixed disconnecting contact

D. CABLE CONNECTION COMPARTMENT

8. Surge absorb

9. Epoxy insulator

10. Block type current transformer

11. Branch busbar

12. Earthing switch

13. Cable clamper

HMS-112 switchgear is divided into four(5) compartments by means of the earthed metal partitions.

- Circuit-breaker compartment

- Low voltage compartment

- Busbar compartment

- Cable connection compartment

- PT & Earthing switch compartment

A. LOW VOLTAGE COMPARTMENT

1. Mounting plate for auxiliary devices

B. CIRCUIT−BREAKER COMPARTMENT

2. Withdrawable breaker truck with HVF VCB

3. Plug and socket for auxiliary circuit

4. Metal shutter

5. Contact bushing

B

A

C

D

①

⑦

⑨

⑩

⑫

⑬

⑭

⑮


②

③

17

E16

⑧

⑤

④

⑪

⑥

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CIRCUIT-BREAKER COMPARTMENT

CIRCUIT−BREAKER REMOVED CIRCUIT−BREAKER IN THE ’SERVICE’ POSITION

HMS-112 switchgear contains a withdrawable breaker truck incorporating

vacuum circuit breaker HVF.

The following interlocks are provided to ensure proper operation and personnel

safety.

- The withdrawal or engagement of a circuit breaker is impossible unless it is

in the “open” position.

- The operation of a circuit breaker is impossible unless it is in the ‘service’ or

‘test/disconnected’ position.- The operation of the earthing switch is impossible unless the associated

breaker truck is in the ‘test/disconnected’ position or removed from the panel.

(Key interlock is provided to ensure a safety operation.)


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LOW VOLTAGE LV COMPARTMENT

BUSBAR COMPARTMENT

PT & EARTHING SWITCH COMPARTMENT

3 single phase, truck mounted potential transformer with current limiting fuses

on both the primary and sccondary side star connected, both neutral points areearthed.

The track-resistant, flame-retardant epoxy polyester insulted contact bushing

completely prevents the propagation of faults from C.B compartment to busbar

compartment or vice versa.

The metal shutters, lockable in the closed position, automatically shield off the

fixed disconnection contacts when the breaker truck is drawn-out.

24 pins plug and socket for auxiliary circuit remain connected in the

‘test/disconnected’ position so that the circuit breaker can be tested.

LV compartment with a front hinged door accommodates relays, measuring

instruments, switches, terminal block and indicating lamps etc.

Standard control wiring in LV compartment is 2.0mm, 600V graded PVC

insulated wire.

Flame-retardant PVC duct makes the wiring easy and simple.

The interconnections between panels can be made through the opening on the

side plate. The opening is shrouded with grommet to protect the wiring work

from damage.

Each wiring is identified by the wire number marked onto white vinyl tube at the

end of each wire. Ring type lug is provided for wiring.

The earthing bar and motor mechanism for earthing switch is provided in

bottom of the compartment for discharging the residual energy when the

breaker truck is in the ‘test/disconnected’ position.

Busbars braced with partition bushing (polyester) run at the bottom of the

panel.

No moving parts enter in the busbar compartment thus making the busbar

invulnerable. The busbar system can withstand high dynamic and dielectric

strength and can reduce heat dissipation.

In 15kV switchgear, high mechanical and electrical featured insulating busbar

system is provided. The removable insulating cover (boot) is placed over thejoints and secured in place.

In 7.2 and 12kV, a bared busbar system is standard.


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CABLE-CONNECTION COMPARTMENT

Cable-connection compartment is accessible by opening a hinged rear door.

(Bolted removable cover plate also available, on request)

A sufficient space is provided for termination of power cables, as many as six

cables per phase can be connected.

Epoxy resin insulated 3 voltage transformers(V.T) mounted on withdrawable

truck, with high rupturing capacity fuses can be located on the upper/rear part

of the compartment.

Extension guide rail is provided for the maintenance of V.T with the truck half-

drawn out but still in the panel.

3 block type current transformers (C.T) can be mounted per panel, however,

bushing type CTs can be added on the line and load side of contact bushing.

Zero phase current transformer and surge arrester can also be located in the

compartment.

The earthing switch operated from the front of panel has a making capacity so

that can be switched onto live parts. The position indicator is provided in the

front of anel.


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SPECIAL TOOLS AND ACCESSORIES

(KA peak)

104(2)

(1) For duration>1s, consult us

(2) 100KA for 50Hz

(3) Single-tie construction, transition panel to be added.

ELECTRICAL CHARACTERISTIC FOR HMS 112

1250,2000

2000,3150

Special tools are supplied as standard.

- Hand crank for breaker truck withdrawal

- Manual charging handle for C.B

- Operating handle for earthing switch.

- Extension guide rail for V.T truck withdrawal

- Trolly for the breaker truck

Accessories

- Auxiliary contact for breaker truck in the ‘service’ position : 1No+1Nc, on request.

- Auxiliary contact for breaker truck in the ‘test/disconnected’ position :

1No+1Nc on request.

- Heater(110V or 220V), if requested or outdoor service, to be supplied in C.B

compartment.

- Surge arrester

- Zero phase current transformer

CUBICLE DIMENSION FOR HMS 112

Rated Voltage

(KV)

Rated Current

(A)

Width

(mm)

(KA rms)

short-time withstandcurrent for 1s

(1)

104(2)

7.2 24501450

40

40

Depth

(mm)

Height

(mm)

601250,2000

3150(3)

7.2 20

Rated current

(A)

Rated

voltage

(KV)

Rated 1minPower-frequency

withstand

voltage(KV rms)

Impulsewithstand

voltage

(KV peak)

1250,2000

3150(3)

12 28 75

650

800

750

1000

1250,2000

315012

2350

24501800


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TYPICAL SECTION VIEWS

OUTGOING FEEDER PANEL(VCB) INCOMING PANEL(VCB)

BUS TIE PANEL BUS PT PANEL

Below pictures show the samples of HMS-112 Hyundai metal-clad

switchgear.

Cable entry

Cable entry is available top or bottom side on request.


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HEAD OFFICE

1. CHONHA-DONG, DONG-KU, ULSAN, KOREA

TEL:82-52-230-8150~6, 8101~12

FAX:82-52-230-8228, 8100

SEOUL OFFICE

140-2, KYE-DONG, CHONGRO-KU, SEOUL, KOREA

TEL:82-2-746-7575, 7515, 7579

FAX:82-2-746-7648

http://www hhi co kr

Catalogue for MVSB

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