ABB UniGear Series User Manual

ENGINEERING SENSO RS
1VLG5 00007 E 29
Maximum current Start and protection setting values
If the ratio of the application nominal current I
n
and sensor-rated primary current I
pr
becomes
higher, and the rated secondary value needs to be set higher than 46.875 mV / Hz, the high-
est value that the relay can measure before the current sensor input is saturated is smaller
than the maximum setting value of the current protection.
Table 4: Maximum current Start and protection setting values
Application Nominal current
(I
n
)
Rated Secondary Value with
80 A / 0.150 V at 50 Hz
Maximum current Start and
protection setting values
... 1 250 A
1.000 … 46.875 mV / Hz
40 x I
n
1 250 … 2 500 A
46.875 … 93.750 mV / Hz
20 x I
n
2 500 … 4 000 A
93.750 … 150.000 mV / Hz
12.5 x I
n
Priority
Each current sensor has unique physical polarity defined by sensor hardware.
Figure 34: Current sensor with unique physical polarity

ABB UniGear Series Specifications

General

Rated Voltage	Up to 24 kV
Rated Current	Up to 4000 A
Rated Short-Time Withstand Current	Up to 50 kA
Frequency	50/60 Hz
Rated Short-Circuit Breaking Current	Up to 50 kA
Rated Lightning Impulse Withstand Voltage	Up to 125 kV
Loss of Service Continuity Category	LSC2B
Partition Class	PM
Type Tested Assembly	IEC 62271-200
Operating Mechanism	Spring-operated, motor-operated
Dimensions	Varies depending on configuration. Consult manufacturer's documentation.
Weight	Varies depending on configuration. Consult manufacturer's documentation.
Protection Degree	Up to IP4X