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Installation

Part No. 057-120 8660 OPERATING MANUAL ISSUE 1 07/05/2010 ADM

4.1.1 LOAD CURRENT TRANSFORMER

WARNING! - Do not disconnect this plug when the CT is carrying current. Disconnection will open

circuit the secondary of the C.T. and dangerous voltages may then develop. Always ensure the CT is not

carrying current and the CT is short circuit connected before making or breaking connections to the

module.

NOTE: - Load CT is NOT REQUIRED in a system including only one mains supply (with one 8660

controller). See section below detailing advantages of the load CT in a multiple mains (multiple 8660)

system.

NOTE: - The 8600 series module has a burden of 0.5VA on the CT. Ensure the CT is rated for the

burden of the 8600 series controller, the cable length used and any other equipment sharing the CT. If in

doubt, consult your CT supplier.

NOTE: - Take care to ensure correct polarity of the CT primary as shown below. If in doubt, check with

the CT supplier.

Description CABLE

SIZE

NOTES

56 CT Secondary for Load CT

2.5mm²

AWG 13

Connect to s1 secondary of Load CT

57 CT Secondary for Load CT

2.5mm²

AWG 13

Connect to s2 secondary of Load CT

NOTE: - Take care to ensure correct polarity of the CT primary as shown in the previous section. If in

doubt, check with the CT supplier.

4.1.1.1 ADVANTAGES OF LOAD CT

The load CT is only required when there is more than one DSE8660 on the same system.

When the load CT is fitted the 8660 transfers the right amount of load to the mains before disconnecting the

generator(s), preventing them from being shock loaded.

Without the load CT, the 8660 does not know how much load to transfer to the mains when other 8660’s are still in

island mode. The 8660 would transfer a pre-determined amount of load before disconnecting the generator(s) from

the mains. This would lead to there being too much load or not enough load transferred, and the generator(s) would

be shock loaded as the generator(s) disconnect from the mains.

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Brainboxes PX-246 Especificaciones Pagina 31