C. Crane 19f Especificaciones descargar pdf (Pagina 11)

Installation Recommendations

Electrical design

Genset / Engine Controls

The generator set is controlled locally by a dedicated

Generator Control Panel. This incorporates the control

systems, metering, alarm indications and customer

connections.

Two types of control system are currently available;

Engine Governing, Control System and Power Command

Control.

A. Make sure that the polarity of the battery connections

are correct before applying power to the all Electronic

Controls.

B.Do not test wire leads to see if they are ‘live’ by

flashing them on either engine body or the Control

mounting stand.

C.Disconnect all connections to the control system on

engine / genset before doing any welding work on set.

D.There are no user serviceable parts inside the various

controls supplied along with Cummins engine / genset.

Call the nearest Cummins office / dealer for help.

E. Turn off or remove AC power from the battery charger

and then remove –ve battery cable from the engine /

genset battery. This will avoid possible damage and

someone else starting engine / Genset accidentally.

F. Make sure the battery area is well ventilated before

servicing the battery. Arcing can cause explosion due

to hydrogen gas given off by batteries.

G.Always refer to the wiring diagram and product manual

supplied with the engine / genset for details.

Electrical protection

If the overload and short circuit protection is provided by

a circuit breaker, care must be taken with the protection

settings. Circuit breakers are designed for operation with

the utility supply, which can provide much higher and

longer fault levels than a generator. The circuit breaker

overcurrent and short circuit settings should therefore be

set according to the overcurrent/short circuit curves of

the circuit breaker and not the overcurrent/short circuit

dials on the circuit breaker. The generator overload and

short circuit settings on the protection should be set so

that they are below the thermal damage curve for the

generator.

Cabling

A. Overheating due to loose thumbing / undersize

cables causes most of electrical failures, hence

power cabling between alternator and control panel

and control panel and change over switch to mains

should be done with correct size of cables and

thimbles.

B.While terminating cables avoid any tension on the

bolts / busbars.

C.While terminating R.Y.B. phase notations should be

maintained in the alternator and control panel for easy

maintenance.

D.Crimped cables should be connected to alternator

and control panel through cable glands.

E. For AMF application, use 8/10 core 2.5 sq. mm

armoured copper cable for control cabling.

F. Typical cable sizes for 415 V application are provided in

the table which are indicative, please refer to cable

manufacturers for details. For HT installations, kindly

contact GOEM’s for details on sizing.

Proper cable terminations

Earthed cable glands for

crimped cables

Typical Cable Sizes for DG Sets

kVA Rating Amp Rating Cable size Sq. mm x Runs

2000 2782 500 x 10 -- --

1800 2504 400 x 10 -- --

1500 2087 400 x 8 300 x 9 240 x 10

1250 1739 400 x 7 300 x 8 240 x 9

1000 1397 300 x 6 225 x 7 --

750 1043 400 x 4 240 x 5 185 x 6

650 904 300 x 4 225 x 5 150 x 6

625 870 300 x 4 185 x 5 120 x 6

600 835 240 x 4 185 x 5 120 x 6

500 696 300 x 3 185 x 4 120 x 5

450 626 240 x 3 150 x 4 95 x 5

380 529 400 x 2 185 x 3 120 x 4

320 445 300 x 2 150 x 3 95 x 4

285 396 225 x 2 120 x 3 70 x 4

250 348 400 x 1 185 x 2 95 x 3

225 313 400 x 1 185 x 2 95 x 3

200 278 300 x 1 -- --

180 250 240 x 1 -- --

160 223 185 x 1 -- --

140 195 150 x 1 -- --

125 174 120 x 1 -- --

100 139 95 x 1 -- --

82.5 115 70 x 1 -- --

75 104 50 x 1 -- --

62.5 87 35 x 1 -- --

50 70 25 x 1 -- --

30 42 16 x 1 -- --

25 40 10 x 4 -- --

20 40 10 x 4 -- --

15 32 6 x 4 -- --

25 (Single Phase) 125 50 x 2 -- --

20 (Single Phase) 80 35 x 2 -- --

15 (Single Phase) 63 25 x 2 -- --

Notes:

1. Use 3 1/2 core armoured power cables woth aluminium conductor (AYFY).

2. Current rating of cables are taken based on operating temperature of 70

3. For multiple runs of cables, deration factor of 0.75 is considered i.e. 25% deration applied.

4. AYFY: Aluminium conductor, PVC insulation, Steel strip armour, PVC outer sheath.

5. Cable sizes mentioned are in square mm.

6. For sets above 1000 kVA, use of proper busbars in bus ducts is recommended.

7. Earthing as per IEC rules to be provided.

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C. Crane 19f Especificaciones Pagina 11

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