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DEIF SCM-1 Synchronizing/Measuring Module.The Synchronizing/Measuring Module (SCM) is a multi-functional module which consists of a synchronizer, a generator breaker control unit and a multi-transducer unit. One SCM-1 can control one generator set with regard to frequency/active power control (speed control), breaker ON/OFF control and voltage/reactive power control, generator protection (I>, P> and –P>) and busbar supervision (UBB>, UBB<, fBB> and fBB<)

The synchronizer operates according to settings received from the Control Module (the operator can change the settings via the Control Panel). The synchronization is carried out as a dynamic synchronization with regard to: - ∆frequency: synchronization is always carried out over-synchronous with regard to a programmable nominal frequency, so that the engine takes load immediately when connected to the busbar. - ∆voltage: the connection to the busbar will take place only if the difference between the voltage on the busbar and the generator voltage is less than a programmable ∆voltage value. - ∆angle: the connection to the busbar will take place only when there is coherent phase angle between the busbar voltage and the generator voltage with regard to the generator breaker closing time (programmable). The frequency/power (engine speed) and/or generator voltage are controlled by PI regulators, which operate according to the measured frequency/power and voltage/reactive power. The outputs from the PI regulators are connected to analog outputs for electronic speed governor (ESG) and electronic voltage regulator (EAVR). Separate relay outputs for Mechanical Speed Governors (MSG) and Mechanical Voltage Regulators (MAVR) can be installed in the SCM-1. The frequency/power (engine speed) and/or generator voltage may be manually controlled via incr./decr. inputs on the SCM-1 module.

DEIF SCM-1 Synchronizing/Measuring Module

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