ReSound UP977-DLW Spécifications télécharger pdf (Page 14)

2.4.5.1 Voltage Regulator:

2.4.5.1.1 The generator MANUFACTURER shall

furnish a hermetically sealed, silicon

controlled rectifier type voltage regulator

employing a zener reference with a +1

regulation for the generator. The

regulator shall include a 3-phase voltage

sensing, automatic short circuit

protection and shall include automatic

under-frequency protection to allow the

generator to operate at no load less

than synchronous speed for engine

start-up and shutdown procedures.

Switches and/or fused shall not be used

to provide this protection. An over-

voltage sensing module with manual

reset shall be furnished with the

regulator. A volts per Hz., sensing

module shall be provided as part of the

regulation system.

2.4.5.1.2 A voltage adjustment rheostat for 5

percent voltage adjustment on the unit

shall be provided.

2.4.5.1.3 High voltage step-down potential

transformers shall be provided for the

voltage regulator power input and

sensing circuits if required.

2.4.5.2 Sustained Short Circuit: A permanent magnetic

exciter shall be provided on the unit for

sustaining a current of 300 percent during a

short circuit, permitting the generator breaker

to trip on overload. To prevent possible

overheating of the armature windings,

appropriate relaying shall be supplied to limit

the fault to ten seconds. All current

transformers required shall be supplied by the

switch gear MANUFACTURER.

DIESEL ENGINE DRIVEN GENERATOR WITH WEATHERPROOF ENCLOSURE 472-13

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ReSound UP977-DLW Spécifications Page 14