ABB REG216 Digital Generator Protection Module Building Engineering

Construction

Hardware

The REG216 device consists of two main components, which are physically separated from each other and connected by standard prefabricated shielded cables

Connected by standard prefabricated shielded cables:

- The main system interface (CT, PT and auxiliary relays), which provides DC isolation and EMI barriers.

Isolation and EMI barrier

- Parallel bus and associated electronic units (e.g. analog inputs and data processors / for signal conditioning and processing).

The complete protection scheme consists of a relatively small number of hardware modules, allowing subsequent expansion of the electronic units and interfaces. Each device frame provides 21 rack spaces.

All hardware can be housed in a single compartment, which provides further shielding against inductive interference and physical protection against dust, etc.

All hardware can be accommodated in a single compartment, which provides further shielding from inductive interference and physical protection from dust.

The REG216 is available in 17 predefined rack configurations with a limited number of I/Os, but is equipped with the same SW library as the classic system.

Protective relays for other functions are not part of the EG216 and can be installed in compartments and interconnected with the REG216 accordingly.

Interfaces to the main system

The following modular components provide the interface between the REG216 and the power system.

Input transformer assembly

216GW62 This assembly is used to adjust the signal level and to isolate the primary system CT and PT circuits from the electronic circuits of the protective devices.

One PT and two CTs are available to meet different accuracy and dynamic performance requirements.

Up to 12 transformers can be accommodated, selected according to application requirements. Up to four components, i.e. 48 inputs, can be used.

Auxiliary relay and optocoupler assembly 216GD61a

This assembly is for use with the REG216 version. It provides eight trip relays,

Each relay has powerful potential-free trip contacts (with surge circuit), 16 auxiliary relays and 16 optocouplers.

relays and 16 optocoupler input circuits. Up to four assemblies are available.

Input Auxiliary Relay Assembly 216GE61

Up to 16 auxiliary relays to provide full potential isolation for digital input signals.

Output Auxiliary Relay Assembly 216GA61

Up to 16 auxiliary relays providing full potential separation for digital output signals (two contacts per signal).

Trip Auxiliary Relay Assembly 216GA62

Provides up to 8 powerful potential-free trip contacts and circuits that provide high-speed operation (surge circuits) and reduced consumption after operation (economy circuits).

The Trip Auxiliary Relay Assembly is available with an optional trip logic diode matrix for direct coupling of external signals.

Matrix for direct coupling of external signals The REG216 can also read and process external signals via digital inputs.

Different trip circuit monitoring arrangements for use with output unit 216DB61 and input auxiliary relay assembly 216GE61 are available.

Parallel bus and electronics unit

The electronics units are of plug-in design and are mounted in equipment racks with a standard size of 19 inches 6U (1U = 44.45 mm).

This rack can be divided into 21 standard partitions. The data exchange via the parallel bus B448C is controlled and monitored by all available devices.

The data exchange via the parallel bus B448C is controlled and monitored by all available devices.

The protection system is based on a data bus with digital signal processing for most functions; signal conditioning, analog and digital inputs, A/D conversion, processing and signal output.

The components of the system include

- Static plug-in units, which exchange data via a powerful parallel bus

- Interfaces to the process (main system, station equipment), isolated from the digital processing unit.

Device rack 216MB66/216MB68 and parallel bus B448C

The main features of the parallel bus B448C are

- Specification based on IEEE P 896 (Future Bus)

- Time multiplexing of address and data (16 bits)

- Asynchronous data transfer with handshaking

- Integrity check for each data exchange

- Up to 32 masters with the same status actively access the bus

- Internal 24 V auxiliary power supply common to all electronics units; redundant 24 V power supplies are available.

Processing unit 216VC62a

- 32-bit processor type 80486DX-2

- Application software in Flash EPROM

- Run data stored in RAM

- Settings on non-volatile flash EPROMs

- Potential-free RS-423 interface for PC operation

- Connection to control station via message transmission

- Time clock synchronization for time stamping of events

- Non-volatile event and disturbance memory (gold capacitor buffer)

- Space required: two racks

Analog input unit 216EA62

- 24 inputs sampled simultaneously, 6 per group

- Sampling frequency 600 (720) Hz, power supply frequency 50 (60) Hz

- Space required: two rack partitions.

Digital Output Unit 216AB61

- 32 outputs for controlling relays that output auxiliary relay assemblies

- Short-circuit proof

- Front panel LEDs to indicate activated relays

- Space required: one rack partition.

Trip output and binary input unit 216DB61

- 8 outputs for bipolar control of auxiliary trip relays

- Monitor Output Amplifier

- 16 digital inputs for signaling auxiliary relay assemblies (each two can be used separately to externally enable and prevent tripping)

- Activated outputs and inputs are indicated by LEDs

- Front space requirement: one rack partition.

Auxiliary DC power supply units 216NG61. 216NG62 and 216NG63

- Models for 36 to 312 VDC inputs

- Output 24 VDC, 150 watts

- Short circuit and overload protected outputs

- Parallel connection for higher ratings

- Parallel connection for redundancy (2 outputs)

- Space required: 3 rack partitions.

All protection functions of the REG216 operate on sampled primary system voltage and current.

The analog input unit has a sampling rate of 12 times per cycle and a dynamic range of 15 bits at the rated power system frequency.

All further signal processing is performed digitally.

As a result, the protection functions are universally applicable, highly accurate and have excellent long-term stability.

Digital filters effectively suppress DC components and harmonics to avoid interference. The trip logic of the internal protection functions (earlier diode matrix) is controlled by software in the REG216.