Specifications
Model
Height
Width
Depth
Weight
mm
mm
mm
kg
451/455/461
247
76
236
3
452/456/462
247
114
236
4
453/457/463
247
152
236
5
454/458/464
280
152
236
5
2.2 PARTIAL LOAD FAILURE DETECTION
Partial load failure detection exists as an option for the
451
series and comes as
standard for the
461
series.
• Partial load failure (PLF) detection principle:
comparison of the load current and voltage (451 series) or
of the power supply (461 series)
to detect an increase in impedance.
• Improved 20% discrimination of the current in the load, does not depend
on supply voltage variations.
• Setting: with a potentiometer on the front fascia from 10 to 100 % of
the unit's nominal current.
• Indication on front fascia with an LED.
• PLF output made via relay switch.
2.3 (OVERALL) DIMENSIONS AND WEIGHT
Table 2.1
451-461 User Manual
2-3
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