Basler Electric LEROY SOMER DECS-100 9287500132 DIGITAL EXCITATION CONTROL SYSTE

Generator and Bus Protection and Metering

Multifunction protection guards against overvoltage, undervoltage,

excessive forward and reverse power, underfrequency, and

overfrequency. Overcurrent, phase imbalance, loss of mains,

frequency rate-ofchange, phase differential, and neutral differential

protection are available as options. Each protection function has

an adjustable pickup and time delay setting.

Sixteen inverse time curves, in addition to user programmable

curves, enable the DGC-2020HD to offer overcurrent protection in

a variety of applications. Each protective element can be assigned

to protect the generator, bus 1. or bus 2 sensing inputs with settings

groups.

Metered generator and bus parameters include voltage, current,

frequency, vector shift, real power (watts), apparent power (VA),

and power factor (PF).

APPLICATION

BE1-67N Ground Directional Overcurrent Relays are recommended for

multi-grounded systems to provide coordination necessary to selectively

trip the faulted line. A directional overcurrent relay operates by

comparing the measured current to a reference quantity to determine

whether current is flowing into or out of the protected zone.

Reference quantity is also referred to as polarizing quantity.

BE1-67N relays use one of the following quantities for polarization:

• Zero sequence current

• Zero sequence voltage

• Dual zero sequence current and voltage

BE1-67N Ground Directional Overcurrent Relays provide ground fault

protection for transmission and distribution lines by sensing the flow

of ground (zero sequence) current into or out of protected zones.

Zero sequence quantities provide a secure reference for the directional

element because these quantities are defined by the total source

impedance of the power system.

The DGC-2020HD provides analog outputs to the power system in the

form of analog bias signals to the voltage regulator and speed governor.

A pulse width modulated (PWM) speed bias output is also available.

When the generator breaker is closed and load sharing is enabled, the

DGC-2020HD shares the real power load proportionally with other

generators in the system. Load sharing can be implemented on the Analog

Load Share Line or through Ethernet communications. Reactive power

(kvar) sharing is accomplished through Ethernet communications.

The DECS-200N is a very compact Negative Forcing Digital Excitation

Control System.Engine Protection and Metering

Engine protection features include oil pressure and coolant temperature

monitoring, overcrank protection, ECU-specific protection elements,

and diagnostic reporting.

Metered engine parameters include oil pressure, coolant temperature,

battery voltage, speed, fuel level, engine load, coolant level (from ECU),

ECU-specific parameters, and run-time statistics.