Eaton ELC2-PV28NNDR-2 AND ELC-EX16NNDR-2 Programmable Logic Controller

The F810 fieldbus power system is designed to provide redundant

Foundation™ fieldbus power for Foxboro I/A Series control systems

using FBM228 modules. Eight fieldbus segments are supported. The

system comprises a baseplate which accommodates two redundant

pairs of Foxboro FBM228 modules and two Eaton F801 or F802 power

modules operating in redundant configuration. Failure alarms, galvanic

isolation, power conditioning and segment termination are incorporated

into each F80x module. In applications requiring simplex power, a single

F80x module may be used.

The Power Xpert® energy meter series power and energy meters monitor

the most critical aspects of an electrical distribution system. This premier

metering instrument uses the latest in advanced technology to make it

simple to use, powerful, scalable, and highly flexible.

Eaton’s Power-Sure 700 is a tap changing transformer that can solve

99 percent of electrical disturbance problems to better protect your

equipment. This computer-grade, three-phase transformer features

standard and advanced metering with 97 perfect efficiency.

Combining the reliable frequency regulation you expect from an

Eaton tap changing transformer with high frequency filtering and

an optional manual bypass switch,  the Power-Sure 700 is the ideal

transformer for any industrial application.

The EBR-3000 relay, combined with an EBR-Z (EBR-3Z), is a digital

protection relay designed for high impedance differential protection

schemes . The intuitive operating system with validation checks and

extensive commissioning functions such as the built-in fault simula

tor allow safe and time-optimized maintenance and commissioning .

The parameter setting and evaluation software PowerPort-E can be

used consistently across the entire family of E-Series relays .

The principle of the high impedance differential protection is compa

rable with low impedance differential protection: Calculate and moni

tor the sum of all the currents flowing into the protected object, and

under non-fault conditions the sum is zero . Any differential current,

however, is forced through the high impedance of the high imped

ance relay .

The input of the high impedance relay consists of a resistance

(EBR-Z) and an overcurrent protection element (ANSI 87 in the EBR

3000) .

The following convention is important to know: Even though the

EBR-3000 measures the currents flowing through the stabilizing

resistor, all the measurements are presented as a voltage across

this stabilizing resistor (which is 2000 Ω for the EBR-Z) . The burden

of the EBR-3000 measuring input (which is in series with the EBR-Z

resistor) can be neglected compared to the 2000 Ω impedance .

The EBR-3000 monitors the magnitude of this voltage to differenti

ate between in-zone and through faults .

A varistor is built into the EBR-Z . It is connected across the input of

the relay to avoid damage to the relay caused by high voltage . The

varistor needs to be able to conduct significant power as the paral

leled CTs deliver current under special fault circumstances (e . g . in

case of a breaker failure) for more than 30 cycles .

To prevent damage to the relay due to system issues, a lockout relay

is required to short-circuit the high impedance when an trip is initi

ated .