ABB VD4 Series Kurzanleitung

—

1. For your safety!

• Make sure that the installation room (space and

environment) is suitable for the electrical

apparatus.

• Check that all the installation, putting into

service and maintenance operations are carried

out by qualified personnel with suitable

knowledge of the apparatus.

• Make sure that the standard and legal

prescriptions are complied with during

installation, putting into service and

maintenance, so that installations are performed

according to the rules of good working practice

and safety in the work place.

• Strictly follow the information in this instruction

manual.

• Check that the rated performance of the

apparatus is not exceeded during service.

• Check that the personnel operating the

apparatus have this instruction manual at hand

as well as the necessary information for correct

use.

• Pay special attention to the danger notes

indicated in the manual by the following safety

notifications:

SAFETY

NOTIFICATIONS

RESPONSIBLE BEHAVIOUR SAFEGUARDS YOUR

OWN AND OTHERS’ SAFETY!

FOR ANY REQUESTS, PLEASE CONTACT THE ABB

MEDIUM VOLTAGE SERVICE.

—

MEDIUM VOLTAGE SERVICES

VD4 Digital addendum

to VD4 installation and service instructions

Index

001 1. For you safety!

003 2. Applicability and characteristics

004 3. Description

006 4. Selection and ordering

008 5. Specific characteristics of the product

011 6. Installation

013 7. Overall dimensions

020 8. Maintenance

“NOTICE” indicates a statement of company

policy as it relates to the safety of personnel

or protection of property.

Safety notations alert personnel to possible

death, injury or property damage situations.

The safety notations appear before the step in

which the condition applies.

The one safety notice and three hazard levels

notations are:

“WARNING” INDICATES A HAZARDOUS

SITUATION THAT HAS SOME PROBABILITY OF

SEVERE INJURY AND SUBSTANTIAL PROPERTY

DAMAGE.

“DANGER” INDICATES A HAZARDOUS

SITUATION THAT HAS A HIGH PROBABILITY OF

DEATH, SEVERE INJURY, AND SUBSTANTIAL

PROPERTY DAMAGE.

“CAUTION” INDICATES A HAZARDOUS

SITUATION THAT MAY RESULT IN MINOR OR

MODERATE INJURY AND/OR PROPERTY

DAMAGE.

CAUTION

—

1. For your safety!

WARNING

DANGER

2VD4 DIGITAL ADDENDUM - TO VD4 INSTALLATION AND SERVICE INSTRUCTIONS

—

2. Applicability and characteristics

VD4 Digital Instructions:

The VD4 Digital circuit-breaker is based on the VD4

version. So much so, most of the information in the

VD4 instruction manual is also applicable to the VD4

Digital circuit-breaker.

Please refer to the instruction manual of the VD4

circuit-breaker (code 647654) for specific

information.

Additional information concerning the VD4 Digital

circuit-breaker is given in this supplement.

MEDIUM VOLTAGE SERVICES 3

Combined current-voltage sensors

The current is measured by a Rogowski coil: a

uniform winding on a closed circular support with a

constant crosssection and without a ferromagnetic

core. The voltage induced in the winding is directly

proportional to the variation in the let-through

current.

The current sensors are characterized by the

absence of saturation and hysteresis phenomena

and by their accurate measurement for fault

currents up to the maximum adjustable setting

value of the protection thresholds.

The voltage is measured by a capacitive divider: a

cylindrical metal electrode moulded in the sensor

and facing the circuitbreaker bushing. The output

signal is a voltage directly proportional to the

primary voltage.

The voltage sensors are characterized by the

absence of ferroresonance phenomena.

General

VD4 Digital circuit breaker with embedded sensors

and a new relay, for instance type REF 615, has been

designed to provide a powerful electrical plant

protection system.

VD4 Digital circuit-breaker uses current sensors or

combined current and voltage sensors

(combisensors) able to measure the current and

voltage applied to each pole.

The VD4 Digital circuit-breaker is available in

withdrawable version for UniGear ZS1 switchgear,

PowerCube units, and OneFit. It can be used in fixed

version for the design and supply of roll-in-retrofit

solutions to MV circuit breaker installed base, in

particular when original circuit breaker had current

or voltage instrument transformers or direct acting

relay mounted on withdrawable truck.

VD4 Digital is mechanically interchangeable with the

VD4 series circuit-breaker.

Combined current-voltage sensors.

—

3. Description

4VD4 DIGITAL ADDENDUM - TO VD4 INSTALLATION AND SERVICE INSTRUCTIONS

VD4 Digital socket Kit - fixed

version

The VD4 digital socket wiring kit for fixed version is

based on standard 58 pin socket and Sensor cables

with RJ45 type terminal connector to bring sensors

signal to a ABB relay mounted on Roll-in-retrofit

truck. In this case the sensor signal does not go

through the 58pin plug/socket but direct to the

relay.

Additional reference Standards

Voltage sensors: IEC 60044-7 (1999-12)

Instrument transformers –

Part 7: Electronic voltage transformers

Current sensors: IEC 60044-8 (2002-07)

Instrument transformers –

Part 8: Electronic current transformers

Structure

Fixed circuit-breaker

Withdrawable circuit-breaker

Fixed circuit-breaker

VD4 Digital socket Kit -

withdrawable version

The VD4 socket wiring kit allows simple and rapid

construction of the panel wiring part. It consists of:

• 58 pin socket (1);

• Cables 1.5 metres long with 2.5 mm² cross section

copper cables for the power connections and with

1 mm² cross section for the signal connections (2);

• Sensor cables with RJ45 type terminal connector

(3).

MEDIUM VOLTAGE SERVICES 5

6VD4 DIGITAL ADDENDUM - TO VD4 INSTALLATION AND SERVICE INSTRUCTIONS

VD4 Digital fixed circuit-breaker without lower and upper terminals (12 kV and 17.5 kV)

Select rating and size, specifing if current sensors only or combined current and voltage sensors are required

Ur Isc Rated thermal current (40 °C) A (1)

Circuit-breaker type Overall

dimensions

kV kA K1 K2 K3

17.5

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

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

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



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

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

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   

   

   

   





   

   

   

   

   

   

   

   



   

   

   

—

4. Selection and ordering

K1-K2-K3 sensor sizes

(1) Rated thermal current

(40 °C): 630A-1000A

(instead of 1250A) –

1600A-1800A (instead of

2000A) – 2300A (instead

of 2500A), with

combisensors.

MEDIUM VOLTAGE SERVICES 7

VD4 Digital/P withdrawable circuit-breakers (12 kV and 17.5 kV)

Select rating and size, specifing if current sensors only or combined current and voltage sensors are required

ø = diameter of isolating

contacts

(1) Rated thermal current

(40 °C): 630A-1000A

(instead of 1250A) –

1600A-1800A (instead of

2000A) –

2300A (instead of 2500A),

with combisensors.

(2) Versions Ø79 p275 are

not available for

PowerCube units.

Versions p210 and p275

are not available for

OneFit.

Circuit-breaker trucks

p210-p275 have a

drawable stroke of

150mm.

Ur Isc Rated thermal current (40 °C) [A] (1)

Circuit-breaker type (2) Overall

dimensions

kV kA    

17.5

   



   

   

   

   

   

   

   

   





   

   

   

   

   



   

   

   

   





   

   

   

   

   



   

   

   

   



   

   

   

8VD4 DIGITAL ADDENDUM - TO VD4 INSTALLATION AND SERVICE INSTRUCTIONS

—

5. Specific characteristics of the product

Current and voltage sensors

Two types of sensor can be used in VD4 Digital

circuit-breakers:

• Rogowski coil: for current measurement only.

• Combisensors: allow both current and voltage

measurements. Along with the Rogowski coil, they

have an integrated capacitive divider for

measuring the voltage applied during each phase.

This new generation of sensors is small, provides a

better performance than conventional current and

voltage transformers and possess a higher degree

of standardization.

Uout

out

= M di

Schematic diagram of the Rogowski coil (current sensor).

Combined current voltage sensor applied to the circuit-breaker poles.

The Rogowski coil

This consists of a uniform winding over a closed

circular support with a constant section and

without a ferromagnetic core.

The voltage generated in the winding is directly

proportional to the derivative of the let-through

current.

There are many advantages in using the Rogowski

coil, amongst which are:

• absolute linearity of the outgoing signal

• no saturation

• no currents able to magnetize the metal core. This

is very important at low current values for current

transformers

• no hysteresis phenomena.

During the design stage of the VD4 Digital circuit-

breaker, the characteristics described above made it

possible to adopt the solution with only three

sensor sizes, which can cover all rated current values

from 50 to 2500 A and guarantee protection against

short-circuits up to 40 kA.



Rogowski current sensors is constant and does not

depend on the primary current value. This means

that the error can be eliminated with an appropriate

characteristic correction factor of the sensor.

Conventional current transformers have an error

that depends on the primary current, so the error is

not constant and cannot be corrected. Moreover, it

takes on considerable values at the ends of the

primary current field.

MEDIUM VOLTAGE SERVICES 9

Ip(log)

Precision limit

Current

sensor

Rated

current

Current

transformer

Extent of the “ε

1000

100

0,1

0,01

0,01 10,1 100010010

Response characteristic of the Rogowski coil compared to that of a current transformer.

secondary current

primary current

Current sensors

without

ferromagnetic core

Current transformers

with

ferromagnetic core

Saturation

10 VD4 DIGITAL ADDENDUM - TO VD4 INSTALLATION AND SERVICE INSTRUCTIONS

Types and characteristics of the sensors used in the

VD4 Digital circuit-breaker

VD4 Digital circuit-breakers, which do not include

voltage measurement, use KEVCR AC1, KEVCR BC1

and KEVCR CC1 current sensors with rated currents

of 1250, 2000 and 2500A respectively. KEVCR AA1,

KEVCR BA1 and KEVCR CA1 type sensors are used

for the VD4 Digital with voltage measurement, with

rated currents of 1000, 1800 and 2300A respectively.

Sensor voltage accuracy voltage data current accuracy current data Rated currents

COMBISENSOR        

CURRENT SENSOR  –––    

COMBISENSOR        

CURRENT SENSOR  –––    

COMBISENSOR        

CURRENT SENSOR  –––    

The capacitive divider

The capacitive element consists of a cylindrical

metal surface facing the circuit-breaker bushing.

The output signal is a voltage directly proportional

to the primary voltage.

The voltage sensors are characterized by the

absence of ferroresonance. Just a single capacitive

divider covers the operating voltage range through

to the rated voltage of the circuit-breaker.

uout = up

C1 + C2

Uout

Schematic diagram of the capacitive divider (voltage sensor).

—

5. Specific characteristics of the product

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