Instruction manual
KRB-5377
24
Fig. 19 shows an ACB(AGR-21B,22B,31B) circuit diagram and Table 10 and Fig. 18 show the function of each terminal and the
meaning of each sign in the diagram.
Fig. 19-1 Breaker circuits 1
Table 10-1 Terminal functions and circuit symbols 1(Applicable to both 50 and 60Hz for AC. and mean the polarity for DC)
Function Terminal No. Remarks
Circuit voltage
Terminal No.
When compatible with both
AC100 - 120V and AC200 -
240V power *5
When compatible with both
DC100 -125V and DC200 -
250V power *5
When compatible with both
DC24V and DC48V power *5
□
01
-
□
11
AC100 - 120V NA NA
□
11
-
□
21
NA DC100 - 125V DC24V
Control power supply
□
01
,
□
11
,
□
21
Connect
the unit to
the
applicable
terminal
Nos.
□
01
-
□
21
AC200 - 240V DC200 - 250V DC48V
Operation power
□
02
-
□
22
AC100－120V, AC200－240V, DC100－125V, DC200－250V, DC24V or DC48V *5
ON switch
□
03
-
□
12
Circuit voltage
Terminal No.
AC100V compatible *5 AC200V compatible *5 AC400V compatible *5
□
08
-
□
09
AC100V AC200V AC380V
□
09
-
□
18
AC110V AC220V AC415V
Undervoltage trip device
power
□
08
,
□
09
,
□
18
,
□
28
Connect
the unit to
the
applicable
terminal
Nos.
□
09
-
□
28
AC120V AC240V AC440V
OFF switch
□
24
-
□
30
Available for ACBs equipped with undervoltage trip device
Continuous-rated shunt
trip device power and
OFF switch
□
10
-
□
20
AC100V, AC110V, AC120V, AC200V, AC220V, AC240V,
DC24V, DC48V, DC100V, DC110V, DC125V, DC200V or DC220V *5
□
05
-
□
15
Long time delay trip (LT)
□
05
-
□
25
Short time delay (ST) and instantaneous trip (INST/MCR)
□
05
-
□
06
Pretrip alarm (PTA)
□
05
-
□
16
Ground fault trip (GF) or reverse power trip (RPT) *5
□
05
-
□
26
System alarm
□
05
-
□
17
Line side ground fault (REF), negative-phase sequence protection (NS), contact overheat monitoring (OH) or tripping
operation *5
Operation indication
□
05
-
□
27
Pretrip alarm 2 (PTA2), undervoltage alarm (UV) or spring charge operation *5
Main circuit input voltage
□
13
,
□
23
,
□
04
,
□
14
R-phase
-
□
13
, S-phase
-
□
23
, T-phase
-
□
04
, N-phase
-
□
14
Separate N-phase CT
□
19
-
□
29
Polarity:
□
19
(
□
31
)
- ,
□
29
(
□
32
)
- *3
Line side ground fault
protection (REF) CT
□
35
-
□
36
Polarity:
□
35
- ，
□
36
-
Zone interlock control
power
□
33
-
□
34
DC24V
Zone interlock signal I/O
□
37
,
□
38
,
□
39
,
□
40
See Fig. 21.
Communication signal
I/O
□
41
-
□
42
Communication signal
Common
□
31
(Reserved)
□
07
-
AGR-21B,22B,31B