Yaskawa VS-616G5 Series Revision F Programming Manual Instrukcja Użytkownika Pobierz pdf (Strona 106)

106 VS-616G5 Programming Manual

Section L: Protection Parameters

L2 Power Loss Ridethrough

In system applications requiring multiple drives with a common DC bus, KEB ride-through functions

differently. The inverter decelerates from the output frequency to the KEB frequency level, according

to the momentary power loss ridethough time (L2-02). The KEB frequency constant (L2-06) is set

according to the following equation:

This method is ideal when helper drives are being used on a film line, and a loss of power might cause

a line break. This method will allow synchronized deceleration for all of the common-bus drives, to

prevent speed deviation and thus a possible line break. If power is restored within the recovery time

(L2-02), then the inverter accelerates to the previous frequency reference according to acceleration

time 1 (C1-01).

KEB Ridethrough

OFF

Output Frequency

L2-06

Fout (1 - )

L2-06

100%

L2-02 (common bus)

OFF

C1-01

Figure 50 KEB Ridethrough Timing Diagram

Multi-function Input Contact

(H1-__ = “65” or “66”)

KEB Frequency Level = Output Frequency (1 - )

L2-06

100%

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 161 162

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