216NG63A HESG441635R1 HESG216877K ABB Module card stock

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Auxiliary dc supply unit 216NG61, 216NG62,

and 216NG63

-Versions for 36 to 312 V dc input

-Outputs 24 V dc, 150 W

-Short-circuit and overload proof outputs

-ParalIei connection to increase rating

-ParalIei connection for redundancy

(two outputs)

-Space requirement: three rack divisions

All the REG 216 protection functions operate

with sampied primary system voltages and currents. The sampling rate of the analogue input

units is 12 times per period at rated power system frequency with a dynamic range of 15 bits.

All further signal processing takes place dig itally. The protection functions are therefore universally applicable, highly accurate and have

excellent long-time stabil ity.

Dc components and harmonic contents are efficiently suppressed by digital filters to avoid disturbance. The tripping logic for the internai protection functions (earlier a diode matrix), is software controlled in REG 216.

Setting and controi

The protection system is set and controlled

using a personal computer connected to it via a

serial interface.

Operation of the console is menu-assisted and

permits:

-Setting of parameters and recording of the

settings

-Display of measured values

-Display of events, their acknowledgement

and print-out

-Disturbance recording (option)

Self-monitoring and testing facilities

The self-monitoring and testing routine philosophy can be divided inta following sections:

-Self-monitoring

-Parameter viewing facilities

-Injection testing with separate test equipment

Self-monitoring

The self-monitoring and testing routine philosophy is quite different from conventionai testing

techniques. Whilst the previous practice in protection was to maintain availability through

comprehensive periodic testing, REG 216 does

this continuously by taking full advantage of

digital and data bus technology.

The self-monitoring functions have two elements:

-Continuous self-monitoring by hardware

-Cyclically executed testing routines, mainly

by software.