11
Air Circuit Breakers
BT2 series
Indication and measurement function
• For L25, M25, M26 and H26
Item
Type of OCR's
Display
Content
Indication and measurement range
Accuracy
Current
L25
Light columnar Indication I
1
, I
2
, I
3
, I
N
I
1
, I
2
, I
3
, I
N
, I
max
I
1
, I
2
, I
3
, I
N
, I
G
, I
max
(0.1In to 2In) A
± 5%
M25
M26, H26
LED
Voltage
M25, M26 as optional
H26 as standard
LED
U
12
, U
23
, U
31
, U
min
30V to 690V
± 3%
• For P25 and P26
Item
Display
Content
Indication and measurement range
Accuracy
Current
LCD
I
1
, I
2
, I3, I
N
(0.1In to 2In) A
± 1.5%
I
G
0.1In to 2000A
± 2.5%
Voltage
Line Voltage: U
12
, U
23
, U
31
30V to 690V
± 0.5%
Phase Voltage: U
1N
, U
2N
, U
3N
Power
Three-phase active power
-120MW to +120MW
± 2.5%
Three-phase reactive power
-120Mvar to +120Mvar
Three-phase apparent power
-120MVA to +120MVA
Power-factor
Power-factor
-1.00 to +1,00
± 2.5%
Electric energy
Three-phase active electric energy
-10
10
GWh to +10
10
GWh
± 2.5%
Three-phase reactive electric energy
-10
10
Gvarh to +10
10
Gvarh
Three-phase apparent electric energy
-10
10
GVAh to +10
10
GVAh
Frequency
f
45 to 65Hz
± 0.1Hz
Fundamental current
I
1-1
, I
2-1
, I
3-1
, I
N-1
(0.1In to 2In) A
± 1.5%
Fundamental line voltage
U
12-1
, U
23-1
, U
31-1
30V to 690V
± 0.5%
Fundamental phase voltage
U
1N-1
, U
2N-1
, U
3N-1
Fundamental power
P1
-120MW to +120MW
± 2.5%
Q1
-120Mvar to +120Mvar
S1
-120MVA to +120MVA
Harmonic ratio
Current
0 to 1000%
± 5%
Voltage
Total harmonic distortion
(THD)
Current
Voltage
Alarm and fault functions
Over-current
alarm
Type L25
Corresponding LED on
the panel will be "ON"
Alarm and release indication lights will be on after the circuit breaker's being overloaded or
released (yellow or red)
Type M25
After the circuit breaker's being released by long-time delay overload, short-time delay short
circuit and instantaneous short circuit, indication lights of corresponding alarm will be on.
Type M26, H26
After the circuit breaker's being released by long-time delay overload, short-time delay short
circuit, instantaneous short circuit and ground-fault, indication lights of corresponding alarm will
be on.
Type P25, P26
After the circuit breaker's being released by long-time delay overload, short-time delay short
circuit and instantaneous short circuit, indication lights of corresponding alarm will be on.
Fault indication Type L25
Corresponding LED on
the panel will be "ON"
After the circuit breaker's being released by long-time delay overload, short-time short circuit
and instantaneous short circuit, indication lights of corresponding fault type will be on.
Type M25
After the circuit breaker's being released by long-time delay overload, short-time short circuit
and instantaneous short circuit, indication lights of corresponding fault type will be on.
Type M26, H26
After the circuit breaker's being released by long-time delay overload, short-time delay short
circuit, instantaneous short circuit, instantaneous short circuit and ground-fault, indication lights
of corresponding fault type will be on.
Type P25, P26
After the circuit breaker's being released by long-time delay overload, short-time delay short
circuit and instantaneous short circuit, indication lights of corresponding alarm will be on.
Indication of
fault phase,
current and time
Type M25,
M26, H26
Indication
Indication of faulty phase, breaking value of fault current and breaking time
Type P25, P26 Indication
It can indicate the latest ten times fault categories and occurrence time, faulty phase, breaking
value of fault current and breaking time.
Intelligent controller
