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Siemens VL 3 User manual

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813651A00
s
1 / 4
VL 3 Switch / 4 Switch Instructions
Operating Instructions / Operación de Instalación
For use with all SIEMENS – 555
Electronic Trip Units
[ Para Usar Con todas las Unidades de
disparo electronicas SIEMENS – 555 ]
For Use With Frame DG, FG, JG, LG, MG, NG & PG
Para Usar Con Caja Base DG, FG, JG, LG, MG, NG & PG
Use only with Siemens certified Components.
Utilizar únicamente con componentes certificados de Siemens.
A utiliser uniquement avec les composants certifiés Siemens.
Turn off and lock out all power supplying this device before
working on this device.
Replace all covers before power supplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement de pouvoir soit alimenté.
Tensión peligrosa.
Puede causar la muerte o lesiones graves. Tension dangereuse.
Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace all covers before power supplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement de pouvoir soit alimenté.
Tensión peligrosa.
Puede causar la muerte o lesiones graves. Tension dangereuse.
Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
I.L. No. 813651A00
NOTE - These instructions do not purport to cover all details or variations in equipment, or to provide for every possible
contingency to be met in connection with installation, operation or maintenance. Should further information be desired or
should particular problems arise, which are not covered sufficiently for the purchaser’s purposes, the matter should be
referred to the local Siemens sales office. The contents of this instruction manual shall not become part of or modify any
prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens. The
warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements contained herein
do not create new warranties or modify the existing warranty.
Trademarks - Unless otherwise noted, all names identified by ® are registered trademarks of Siemens AG or Siemens
Industry, Inc. The remaining trademarks in this publication may be trademarks whose use by third parties for their own
purposes could violate the rights of the owner.
2 / 4 813651A00
To change settings on a Model 555 Electronic Trip Unit
Time-current curves represent the tripping characteristics of a circuit breaker. Often referred to
as “trip curves”, they are used for design, selection, and coordination of electrical distribution
systems. Time-current curves, similar to the one shown in Figure 1, are used to show how fast a
breaker will trip at various currents.
Figure 1
Long-time Function. The top part of the curve, which represents the overload trip function of the
circuit breaker. Long-time Pickup Setting (Ild) equals 105% -130% of the Current Setting (Ir).
Short-time Function. The short-time pickup function is adjustable with electronic trip-units only. It
determines the amount of current the breaker will carry for a short period of time before tripping, allowing
downstream devices to clear short-circuits without tripping the upstream device. Typically, this will be in
the realm of 1.5 to 10 times rated current.
Instantaneous. The bottom part of the curve, this represents the region in which the circuit breaker will
trip without any intentional delay.
Ground Fault Protection. A trip function that responds to current traveling outside the intended path.
L
S
I
G
G
L
I
S
3 / 4 813651A00
Instantaneous Pickup setting
Ii
Short Time Delay
(fixed time delay)
tsd
(I2t OFF)
Short Time Delay
I2t function based on 8 x Ir
tsd
(I2t ON)
Short Time Pickup
Isd
Long Time Delay
I2t function based on 6 x Ir
tr
Current Setting
Ir
DescriptionSetting KnobParameter
L
S
I
LI & LIG LSI & LSIG
LI & LIG LSI & LSIG
LSI LSIG
LI, LSI & LIG LSIG
The 5th digit of the catalog number signifies the trip unit configuration type:
e.g., Cat. No. NJG3R400L R = LI
T = LSI
W = LIG
V = LSIG
G
Ground Fault Delay
I2t function based on 2 x Ig
tg
Ground Fault Pickup
Ig
Brief DescriptionSetting KnobParameter
Subject to change without prior notice © Siemens Industry Inc. 2012
Siemens Industry, Inc. , Norcross, GA 30092 U.S.A.
Technical Support: Toll Free: 1-800-241-4453 Internet: www.usa.siemens.com/powerdistribution
4 / 4 813651A00
Option
Opción
Option
Opción