Schneider Electric Altivar 58 VW3-A58101 Uživatelský manuál stáhnout pdf (Strana 70)

ALTIVAR

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58 Keypad Display VVDED397047US R8/01

Chapter 2 — Menus 08/01

Figure 19: Brake Logic Timing Diagram

Parameters accessible in the 2—Adjust menu:

• brake release frequency (brL)

• brake release current (Ibr)

• brake release time (brt)

• brake engage frequency (bEn)

• brake engage time (bEt)

Recommendations for configuring the Brake Logic control parameters:

• Brake release frequency (brL):

Set the brake release frequency to the value of the nominal slip (g)

multiplied by the nominal frequency (FS) in Hz.

brL = g x FS

g = nominal motor slip

FS = nominal motor frequency (indicated on the motor nameplate)

Example Calculation: nominal slip (g) = (Ns – Nr) / Ns

Ns = synchronous speed in rpm

Nr = nominal speed at nominal torque in rpm, use the speed

indicated on the motor nameplate

Referenc

Brake State

R2 Relay

Motor Current

Motor Frequency

bEn

Ibr

brL

brtT bEt

Motor Speed

Increasing or Decreasing

T = non-adjustable delay

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 111 112

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Schneider Electric Altivar 58 VW3-A58101 Uživatelský manuál Strana 70