HUW1
Series Intelligent Universal Circuit Breaker
7
Continued
Rated current (A)
Specification of external copper busbar
width×thickness (mm)
Number of wires per
terminal (piece)
Cross-sectional area per
terminal (mm
2
)
3,200
100×10
4
4,000
3,600
100×10
5
5,000
4,000
100×10
5
5,000
5,000
100×10
6
6,000
6,300
100×10
8
8,000
Note: The material of the external copper busbar in this table is T2 bare copper. The specifications of the external copper
busbar can be changed according to the actual usage, but it shall meet the cross-sectional area requirements of different
currents in the table. Also, the sum of the contacting areas between copper busbars shall not be less than the
cross-sectional area so as to ensure good contact.
6
Protection Characteristics of the Intelligent Controller
6.1
Type and interface description of 1,000 A shell frame intelligent controller
Type L4 (DIP)
Type 2M (digital display)
Type 3H (liquid crystal)
6.1.1
Interface symbols, indicator lights and key descriptions of 1,000 A shell frame L3/L4 (DIP)
intelligent controller
Serial
number
Symbol/Name
Definition
1
Reset button
After the release is interrupted due to the circuit breaker fault, it is required to press
this button before the circuit breaker can be closed again.
2
In
Circuit breaker rated current
3
“40–100” indicator light
This group of lights is a load current indicator, which shows the percentage of the
load current to the setting current (I
r1
). If the percentage exceeds 100%, the
overload light will be on
.
4
"I
g
, I
i
, I
sd
, I
R
" fault
indicator light
When there is a ground fault, the I
g
light is on;
when there is an overload fault, the I
R
light is on;
and when there is a short-circuit fault, the I
sd
light is on for the short-delay
action of the circuit breaker and the Ii light is on for the instantaneous action.
5
Time setting value
comparison table
Comparison table of action delay time values of grounding protection, short-circuit
short time delay protection and overload long time delay protection.
6
Current setting value
comparison table
Comparison table of current multiples of grounding protection, short-circuit
instantaneous protection, short-circuit short time delay protection and overload long
time delay protection.