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M‑5625 Digital Synchronizing System

Description

The M-5625 Syncrocloser Digital Synchronizing

System is suitable for the automatic synchronizing

of a generator to the electric power network. The

system provides speed and voltage "jogs" to bring

a generator to proper conditions of matching

voltage and frequency, prior to safely and

accurately closing a breaker into a bus energized

by an electric power network.

The Digital Synchronizing System is intended for

three general classes of application:

• Initial connection of a generator to a power

network as shown in Figure 1

POWER NETWORK

52G

GEN

Figure 1 Automatic Synchronizing of a Generator to a Power Network

The system can also be used for manual

synchronizing application. A typical Control Wiring

Diagram of Generator Synchronizing System is

illustrated in Figure 3.

AVR

–6–

• Closure of a network breaker where

there is a possibility of a split of the

system into two isolated networks having

different frequencies

• Breaker closure applications with a static

phase angle (see Figure 2 Automatic

Synchronizing for Synchronous and

Asynchronous lines and Bus bars)

DIGITAL

SYNCHRONIZING SYSTEM

BUS VT

GEN/LINE VT

90R

90L

15R

15L