Emerson unidrive sp User Manual

Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menu 3
Regen
Unidrive SP Advanced User Guide 83
Issue Number: 10 www.controltechniques.com
The drive checks for mains loss either by monitoring the d.c. link or additionally when the inverter is active by an internal estimate of the a.c. supply
level. The detection levels used for different drive voltage ratings are given in the following table.
During power-up the supply is considered okay and the drive can operate if the d.c. link voltage is above the levels given in the table below.
The operation of the drive in regen mode is shown in the state machine below.
The power (Pr 5.03) and the reactive power (this parameter) are the power or VAR's respectively that flow from the supply to the drive. Therefore
when this parameter is positive the phase current flowing from the supply to the drive contains a component that lags the respective phase voltage,
and when this parameter is negative the phase current contains a component which leads the respective phase voltage at the drive terminals.
Voltage
rating
DC voltage mains
loss detection level
AC voltage mains
loss detection level
VV dc V ac
200 205 75
400 410 150
575 540 225
690 540 225
Drive voltage rating dc voltage for supply okay
VV dc
200 215
400 430
575 565
690 565
3.01
Reactive power
Drive modes Regen
Coding Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 121 1 1
Range Regen ±POWER_MAX kVAR’s
Update rate Background write
Mains loss
Current trim
Close contactor
Waiting for enable
Open contactor
Current trim
Close contactor
Active but not synchronised
Synchronised
Supply okay
Trim complete
Contactor closed + 100ms delay
Enabled
(Pr =0)
3.11
Enabled
Trim complete
Synchronised
Disabled
Disabled
Open contactor (Pr 3.07=0)
Mains loss or contactor
open when it should be
closed
(Pr 3.07=1)
(Pr 3.07=0)
(Pr 3.07=1)
Contactor open (Pr 3.07=0)
+ 100ms delay
Contactor closed (Pr 3.07=1)
+ 100ms delay
(Pr =1)
3.11

Emerson unidrive sp Specifications

General

Brand	Emerson
Model	unidrive sp
Category	Controller
Language	English