Instantaneous Protection (I); Shortage Current To Ground Protection (G) - WEG ABW Serie Manual De Instrucciones

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4.5.3 Instantaneous protection (I)

Protection against short-circuit (instantaneous performance).
1. Current Ii
- Adjustment of range:
(2-3-4-6-8-10-12-15-Off) xIn
2. The unit performs as per the greatest current between the phases R, S, T and the neutral N.
3. Total interruption time less than 50ms.

4.5.4 Shortage current to ground protection (G)

Protection against shortage current to ground, with feature of inverse time or defined time.
1. Current Ig
- Adjustment of range:
(0.2-0.3-0.4-0.5-0.6-0.7-0.8-1.0-Off) xIn
2. Performance time tg
- Adjustment of range for inverse time:
(0.1-0.2-0.3-0.4)s
- Adjustment of range for defined time:
(0.05-0.1-0.2-0.3-0.4)s
3. The unit performs as per the vectorial sum between currents of the phases R, S, T and neutral N.
4. The unit can also operate instantaneously by means of the function ZSI.
5. This protection function uses the internal CTs.
40 | ABW - Air Circuit Breaker
Figure 4.5: Instantaneous protection (I).
Figure 4.6: Shortage current to ground protection (G).