Eaton EBR-Z high impedance bus differential relay

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 .

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.

Increase profitability by reducing equipment downtime

Frequent brownouts and voltage regulation problems cause costly

downtime. The Power-Sure 700 is uniquely designed with a high in-rush

current and rapid response to protect equipment and facilities against

those problems.

A transformer designed for tight spaces and small footprints

Front-only access on Power-Sure 700 units up to 150 kVA in size means

that limited space won’t stand in the way of optimal protection.

Minimise CapEx and maximise investment return with the revolutionary smart

universal marshalling solution, SUM5. MTL SUM5 combines five functions in

one modular design enabling one standard cabinet to deliver the lowest

lifetime costs and lowest installed cost while saving valuable space in a control

room.

MTL SUM5 offers a single cabinet design, with ‘plug and play’ configurable

modules for the five key marshalling functions. This eliminates the need for

intricate wiring to interconnect the components, ultimately improving uptime

and reducing the cost of wiring, installation and maintenance.

MTL SUM5’s modular design simplifies marshalling and provides increased

flexibility throughout the product lifetime. Loop disconnect is integrated in

every terminal, so loops can be easily isolated, which together with the modular

design, simplifies maintenance and keeps associated costs to a minimum.

MTL SUM5 reduces the number of marshalling components by 65% compared

to a standard solution. One MTL SUM5 universal ADIO isolator module supports

the functionality provided by 20 different MTL4500 single channel modules,

while the configurable parameters enable support for an even wider range of

applications. The marshalling solution provides comprehensive diagnostics,

notifying the process managers when action is required. It also features LED

indicators for power, function and status, which simplifies commissioning and

troubleshooting. The MTL SUM5 modules are designed for both cabinet mounting

in the control room, or field mounting. They are certified for ambient operating

temperatures from –40 to +70°C and for mounting in a Zone 2 hazardous area,

thus providing reliable operation in remote locations.