HUW1
Series Intelligent Universal Circuit Breaker
10
6.2.1
Interface symbols, indicator lights and key descriptions of 2,000 A (and above) 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
r4
, I
r1
, I
r2
, I
r3
” DIP switch
Setting of the asymmetric grounding (neutral connection) fault, overload long time delay,
short-circuit short time delay, and short-circuit instantaneous rated current multiples respectively
5
"Fault Display" area indicator
light
Indicate the fault category (corresponding to indicator light is on): I
r4
indicates grounding fault, I
r1
indicates long time delay fault, I
r2
indicates short time delay fault, I
r3
indicates instantaneous short
circuit fault
6
"t
G
, t
L
, t
S
" DIP switch
Setting of the action time of the asymmetric grounding (neutral connection) fault, overload long time
delay and short time delay. See the corresponding table under the DIP switch for the setting time
7
"Fault Check" key
Press this button to display the previous line fault protection section of the system memory
8
“Select” key
Press this key to cyclically display L
1
, L
2
and L
3
phase currents or fault check status to cyclically
display the fault current or the time value
9
"Test" key
During normal operation, press the test button, and the controller will send out instantaneous trip
signals to test the action performance of the circuit breaker
10
"Clear Light" key
After the test trip, phase current selection, fault check and fault trip, press the clear light key to
restore the controller to a normal working state
11
"Overload"
indicator light
When the light is on, it means that the load current has exceeded the overload long time delay
protection current value, and the overload long time delay starts to delay the action or the alarm
12
"Phase Current" indicator
light
Display L1, L2 and L3 phase currents, and show the phase with the largest current during the
operation
13
"MCU" indicator light
During normal operation, the MCU light is normally on, and goes out during self-diagnosis and power
failures
6.2.2
Interface symbols, indicator lights and key descriptions of 2,000 A (and above) shell frame 2M
(digital) 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
Digital display window
Parameters such as current, voltage, frequency, setting and fault are displayed in the window
4
“Test” indicator light
Display when setting the test trip and no trip (corresponding to the test area)
5
"Fault Display" area indicator
light
I
r4
indicates grounding current, I
r1
indicates long time delay current, I
r2
indicates short time delay
current, I
r3
indicates instantaneous current, time setting and fault display
6
"Load 1, Load 2" indicator
light
Load Monitoring 1 & Load Monitoring 2 current setting and alarm indicator light
7
“Setting” key
Select keys for setting parameters (current and time) of the items such as grounding, long time delay
and short time delay
8
"Trip" key
Check whether the opening function of the intelligent controller is normal (the circuit breaker is
closed first) or not
9
“No Trip” key
Check whether the intelligent controller's
“Alarm Only Without Opening" function is normal (the
circuit breaker is closed first) or not
10
"Save" key
After setting the parameters, press the "Save" key to save them
11
Power interface
DC 24 V power input port;
12
"+/-" key
When adjusting parameters, press the "+" key for increasing and the "-" key for decreasing
13
"Fault Check" key
Press this button to display the previous line fault protection section of the system memory
14
"Display Check" key
Press "Clear Light
” and then the "Display Check" key for three seconds to turn on all lights and digital
tubes, then release the key to turn off all lights
15
"Clear Light" key
After the test trip, phase current selection, fault check and fault trip, press the clear light key to
restore the controller to a normal working state
16
“Select” key
Press this key to cyclically display L
1
, L
2
and L
3
phase currents or fault check status to cyclically
display the fault current or the time value
17
"G, L1, L2, L3, MAX"
indicator lights
Four-phase, grounding and maximum phase current indicator lights, corresponding to the maximum
current phase and MAX indicator light
18
"A, kA, s" indicator light
Current and time unit indicator light, where A indicates ampere (long time delay and short time
delay), kA indicates kiloampere (instantaneous), and s indicates second
