Eaton Power Xpert Gateway Series 1000 Card User's Guide download pdf (Page 221)

Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com V3-T9-221

9.4

Metering Devices, Protective Relays, Software and Connectivity

Protective Relays

DP-300

Contents

Description Page

Product Selection Guide . . . . . . . . . . . . . . . . . . . . . V3-T9-158

FP-6000 Feeder Protection. . . . . . . . . . . . . . . . . . . V3-T9-162

FP-5000 Feeder Protection. . . . . . . . . . . . . . . . . . . V3-T9-172

FP-4000 Feeder Protection. . . . . . . . . . . . . . . . . . . V3-T9-180

MP-3000 Motor Protection. . . . . . . . . . . . . . . . . . . V3-T9-188

MP-4000 Motor Protection. . . . . . . . . . . . . . . . . . . V3-T9-198

MD-3000 Motor/Generator Differential Relay. . . . . V3-T9-204

Digitrip 3000. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V3-T9-207

VR-300 Multifunctional Voltage Relay . . . . . . . . . . V3-T9-217

DP-300 Current Differential Protection Relay

Standards and Certifications . . . . . . . . . . . . . . . V3-T9-222

Technical Data and Specifications . . . . . . . . . . . V3-T9-222

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . V3-T9-224

EDR-3000 Feeder Protection . . . . . . . . . . . . . . . . . V3-T9-226

ETR-4000 Transformer Protection Relay. . . . . . . . . V3-T9-237

Ground Fault Relay . . . . . . . . . . . . . . . . . . . . . . . . . V3-T9-250

Universal RTD Module . . . . . . . . . . . . . . . . . . . . . . V3-T9-254

IQ 125 Volt DC Power Supply . . . . . . . . . . . . . . . . . V3-T9-258

DP-300 Current Differential Protection Relay

Product Description

The current flowing in the

individual conductors is

measured by means of

current transformers

installed on both sides of

the protection zone. These

transformers form the limits

of the protection zone. By

means of freely configurable

relays, the unit will indicate

if any of the adjusted fault

current limits have been

exceeded. The unit counts

with a slope characteristic

to prevent operation due

to CT ratio mismatches,

CT ratio errors, CT saturation

and errors because of tap

changes.

For transformer applications,

the unit has 2nd and 5th

harmonic restraints to

prevent misoperation in case

of inrush currents caused

for energization or over

excitation of the transformer.

When used in transformer

applications, the DP-300

allows you to change the

phase shift of the

transformer, without having

to worry about changing the

connection of the external

CTs, via selecting the vector

group in the display. The

different nominal currents of

the high and low voltage side

of the transformer, as well as

the transformer ratio, may be

configured. Every measuring

point may be set separately.

These features permit the

DP-300 to be universal in its

applications.

The DP-300 permits design

simplification of the

switchgear cabinet, facilitates

the commissioning, ensures

the operation of the system,

is user friendly and increases

the availability of the system.

Application Description

The DP-300 offers a three-

phase current differential

protection for generators,

motors and two winding

transformers, see Page V3-

T9-223.

Features, Benefits

and Functions

●

True rms 6 x current

measurement, three-phase

system on both sides of

the protected zone

●

Secondary current

transformer output

available as: /1A or /5A

●

Configurable trip set

points for:

●

Differential current (Id)

●

Restrain current (Is)

●

Configurable delays

●

Four alarm relays

●

Three discrete inputs (for

blocking, acknowledgment

and configuration)

●

Two-line LC display

●

Configurable transformer

ratio

●

Configurable vector group

●

Transformer inrush

detection/suppression

●

Individual configuration of

the nominal current for the

high- and low-voltage side

of the transformer

●

Configurable transformer

ratio separated for currents

of high- and low-voltage

side of the transformer

1 2 ... 216 217 218 219 220 221 222 223 224 225 226 ... 298 299

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