Category: ABB

Data communication

The annunciator unit is provided with a serial interface on the rear panel.

By means of a bus connection module type SPA-ZC 17/S or SPA-ZC 21/S

the unit can be connected to the fibre-optic SPA bus. The bus connection

module type SPA-ZC 21/S is powered from the host unit, whereas the bus

connection module SPA-ZC 17/S is provided with a built-in power unit,

which can be fed from an external secured power source. The unit com

municates with higher-level data acquisition and control systems over

the SPA bus.

Self-supervision

The annunciator incorporates a sophisticated self-supervision system

which increases the availability of the device and the reliability of the system.

The self-supervision system continuously monitors the hardware and the soft

ware of the unit. The system also supervises the operation of the auxiliary

supply module and the level of the electronics’ voltages generated by the

module. If a permanent fault is detected, the fault indicator on the front

panel is lit, the output relay of the self-supervision system operates and

the outputs are blocked.

Auxiliary supply voltage

The auxiliary supply of the relay is obtained from an internal plug-in type

power supply module. Two auxiliary power module types are available:

type SPGU 240A1 for the supply voltage range 80…265 V ac/dc and type

SPGU 48B2 for the supply voltage range 18…80 V dc. The power supply

module forms the internal voltages required by the annunciator.

Design

The annunciator unit is composed of four modules: an alarm annunciator module,

an input/output module, a connection module and a power module, housed

in a rugged aluminium casing.

The alarm annunciator module includes 16 alarm channels. The channels

are activated by normally open or normally closed process contacts.

The required 48 V dc contact circuit voltage is generated and supervised by the

annunciator unit. Each channel can separately be assigned a start delay from

5 ms to 160 s.

On activation of a channel the visual indicator of the channels starts blinking.

One of five standardized blinking systems according to ISA and DIN can be

selected by the operator at commissioning.

The annunciator is provided with a first-out indication given via the four-digit

alphanu merical display on the front panel. The first out alarm is indicated with

a letter A and the channel number.

The annunciator unit is also provided with an event register, which stores the

last nine events in chronological order. The event reg ister can be read via the

push-buttons and the display on the front panel or via the serial interface.

The annunciator holds four output relays, two of which are used as group alarm

output relays. One of five modes of operation can be selected for the realarm

output relays.

One output relay is dedicated for the self supervision system and one for the

control of an audible device, such as a buzzer or a horn. Any information

generated in the annunciator unit can be read by a hierarchically superior

system via the serial interface.

Application

The digital annunciator unit is used in a variety of applications requiring

supervision of alarm and signalling contacts in power plants, substations

and industrial process installations. The alarm unit is also approved for

use in off-shore installations and marine applications.

Further, the annunciator unit can be used in any application where on/off

signals are to be supervised.

The annunciator unit provides immediate fault recognition, fault identification

and visual and audible alarm in an abnormal process situation.

The annunciator unit also provides a means for subsequent fault analyses,

which means that corrective measures can be carried out without delay and

full control of the process can be maintained.

The annunciator units can be used as indepen dent stand-alone units,

or they can be connected together via a fibre-optic bus to form complete

supervision, event sequence reporting and data acquisition systems.

The annunciator unit is a member of SPACOM, the ultimate integrated

secondary equipment system for power systems.

Features

• Flexible, field-customizable 16-channel annunciator unit

• Alarm channels activated by normally open or normally closed contact

• Four output relays, i.e. two for group realarms, one for an audible

device and one for the self-supervision system

• Parameter selection and adjustment from front panel or via serial interface

• First-out alarm indication with clear four digit display on the front panel

• Extensive data communication via the serial interface and the SPA bus

• Sophisticated hardware and software self supervision system for

maximum opera tional reliability under the most demanding

environmental conditions

• Powerful software support for parameter ization of the unit via the

serial interface

• Member of the SPACOM product family and ABB’s Distribution

Automation system

• CE marking according to the EC directive for EMC

Overvoltage unit

When the voltage values exceed the set start value of low-set stage U>,  the overvoltage

unit will start to deliver a start signal after a ~60 ms’ start time. When the set operate time

at definite-time characteristic or the calculated operate time at inverse definite mini

mum time (IDMT) characteristic elapses, the overvoltage unit will deliver a trip signal.

When the voltage values exceed the set start value of high-set stage U>>, the overvoltage

unit will start to deliver a start signal after a ~50 ms’ start time. When the set operate time

at definite-time characteristic or the calculated operate time at IDMT characteristic

elapses, the overvoltage unit will deliver a trip signal.

The low-set and the high-set stage of the overvoltage unit can be given either a defi

nite-time or an IDMT characteristic. At IDMT characteristic, two time/voltage curve

groups, A and B, are available.

It is possible to block the tripping of an over voltage stage by applying an external binary

input signal to the relay.

The high-set stage can be set out of operation. This state will be indicated by dashes on the

LCD and by “999” when the set start value is read via serial communication.

Application

The over and undervoltage relay REU 523 is a secondary relay which is connected to the

voltage transformers of the object to be protected. The over and the undervoltage unit

continuously measure the fundamental wave of the phase-to-phase voltages of the object.

On detection of a fault, the relay will start, trip the circuit breaker, provide alarms, record

fault data, etc., in accordance with the application and the configured relay functions.

The overvoltage unit includes low-set stage U> and high-set stage U>> and the undervolt

age unit low-set stage U< and high-set stage U<<. The high-set undervoltage stage can

alternatively be set to evaluate the positive phase-sequence voltage. In addition, the high

set undervoltage stage can be configured to evaluate only one instead of three phase-to

phase voltages.

The protection functions are independent of each other and have their own setting groups

and data recordings. The over and undervoltage functions use conventional voltage trans

former measurement.

An output contact matrix allows start or trip signals from the protection stages to be

routed to the desired output contact.

Design

The relay includes a high-set and low-set overvoltage unit, a high-set and low-set und

ervoltage unit and a circuit-breaker failure protection unit. Further, the relay includes an

HMI module, a self-supervision system and a disturbance recorder.

Features

• Single- or three-phase use

• High-set overvoltage stage with definite-time or inverse definite minimum time

(IDMT) characteristic

• Low-set overvoltage stage with definite-time or IDMT characteristic

• High-set undervoltage stage with definite-time or IDMT characteristic

• Low-set undervoltage stage with definite-time or IDMT characteristic

• Positive-phase-sequence protection

• Adjustable drop-off/pick-up ratio for the low-set over and undervoltage stages

• Circuit-breaker failure protection (CBFP)

• Disturbance recorder

• recording time up to 12 seconds

• triggering by a start or a trip signal from any protection stage and/or by a binary

input signal

• records three analogue channels and eight digital channels

• adjustable sampling rate

• Non-volatile memory for

• up to 60 event codes

• setting values

• disturbance recorder data

• recorded data of the five last events with time stamp

• number of starts for each stage

• alarm indication messages and LEDs showing the status at the moment of

power failure

• Three accurate voltage inputs

• Galvanically isolated binary input with a wide input voltage range

• All settings can be modified with a personal computer

• HMI with an alphanumeric LCD and manoeuvring buttons

• IEC 60870-5-103 and SPA bus communication protocols

• Two normally open power output contacts

• Two change-over signal output contacts

• Output contact functions freely configurable for desired operation

• Optical PC-connector for two-way data communication (front)

• RS-485 connector (rear) for system communication

• Continuous self-supervision of electronics and software. At an internal relay fault

(IRF), all protection stages and outputs are blocked.

• User-selectable rated frequency 50/60 Hz

• User-selectable password protection for the HMI

• User-selectable nominal voltage 100/110/115/120 V

• Display of primary voltage values

• Demand values

• Multi-language support

The REU 523 is intended for overvoltage and undervoltage protection in medium

voltage distribution networks but can also be used for protection of generators,

motors and transformers.

The REU 523 continuously evaluates the fundamental wave of the three phase-to

phase voltages. In addition, the high-set undervoltage stage can be configured to

evaluate either only one instead of three phase-to-phase voltages or the

positive-phase-sequence voltage.

The REU 523 is based on a microprocessor environment. A self-supervision system

continuously monitors the operation of the electronics and the software.

The HMI includes a Liquid Crystal Display (LCD) which makes the local use of the

relay safe and easy.

Local control of the relay can be carried out using a portable computer connected to

the front connector and remote control via the rear connector connected to the

distribution automation system through the serial interface and the fibre-optic bus.

Features/Benefits

• Fully automated testing, including the application of tape

• Perfect for troubleshooting as profiles can be measured and sections of

poor strength can be found

• Operator-independent measurement results

• Unique compression device for perfect

alignment of upper and lower test surface

• Touchscreen for ease of use

• Integrated strip feeder

• Built-in thermo printer for alternative logging of results

Features

• Large touchscreen with user-friendly interface

• Test piece support and automatic clamping for easy and precise

test piece loading

• Enhanced auto-touch function with improved post-processing

for faster, operator independent testing

• Ergonomically placed start button

• Quick overview of results

• Graphical display of bending curve with break angle/force indication

for analysis

• Bending length detection for ensuring correct program settings

• Adjustable bending angle

• Adjustable angular testing speed

• Easy instrument check and calibration

• Bending lengths of 1. 5. 10. 15. 20. 25 and 50 mm

• Available with 1N, 5N or 10N load cells

• Optional 25 mm sample support available