Instruction manual
KRB-5377
17
Table 4 High-performance types
Frame size (A) 1250 1600 2000 1600 2000 2000 2500 3200 4000
Type AR212H AR216H AR220H AR316H AR320H AR420H AR325H AR332H AR440H
IEC, EN, AS
JIS
Max. rated current [I
n
] (A) *1, *2
Marine use
1250 1600 2000 1600 2000 2000 2500 3200 4000
N-phase rated current (A) 1250 1600 2000 1600 2000 2000 2500 3200 4000
Number of poles *3, *4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3
Dielectric withstand voltage [U
i
] (50/60Hz) *5
1000 1000 1000 1000 1000 1000 1000 1000 1000
Operating voltage [U
e
] (50/60Hz) *6
690 690 690 690 690 690 690 690 690
Rated breaking/making current [kA sym rms/kA peak] *7
AC 690V *9 55/121 85/187 75/165 85/187 75/165
IEC ,EN, AS [I
CS
= I
CU
]
JIS C 8201-2-1 Ann.1 Ann.2
AC 440V 80/176 100/220 120/264 100/220 120/264
AC 690V 55/128 85/201 *14 85/201 *14
NK *8
AC 450V 80/186 100/233 *14 100/233 *14
DC 600V *10
For DC
DC 250V
40/40
Rated short-time current [I
CW
] [kA rms] (1 sec.)
80 100 100 100 100
Rated latching current (kA) 65 85 100 85 85
With maintenance 30000 30000 25000 30000 25000 15000 20000 20000 15000
Mechanical
Without maintenance
15000 15000 12000 15000 12000 8000 10000 10000 8000
AC 460V 12000 12000 10000 12000 10000 3000 7000 7000 3000
Endurance
in number of ON-
OFF cycles *11
Electrical
Without
mainte-
nance
AC 690V 10000 10000 7000 10000 7000 2500 5000 5000 2500
Installation Draw-out or fixed type
Mass (kg) for draw-out type 79 94 79 94 79 94 105 125 105 125 139 105 125 105 125 139
External dimensions (mm)
a 360 445 360 445 360 445 466 586 466 586 - 466 586 466 586 -
b 460 - 460 -
c 290 - 290 -
Fixed
type
*12
d75 -75 -
a 354 439 354 439 354 439 460 580 460 580 631 460 580 460 580 631
b 460 460 460 460
c 345 375 345 380
Draw-
out type
*13
d40 5340 60
Line side
Vertical terminals (Horizontal terminals can be specified as an
option)
Vertical
terminals
Vertical terminals
(Horizontal terminals can
be specified as an option)
Vertical
terminals
Connection method
Load side
Vertical terminals (Horizontal terminals can be specified as an
option)
Vertical
terminals
Vertical terminals
(Horizontal terminals can
be specified as an option)
Vertical
terminals
Control circuit terminal type screw terminals
Spring charging method Manual or motor charging
Overcurrent release (OCR) No OCR, or L-characteristic for general feeder protection
Operation indication Group indication
Tripping coil
(TC)
Standard equipment for OCR-equipped ACB
Shunt trip device
(SHT)
Optional
Tripping device
Undervoltage trip
device (UVT)
Optional
Number of switches 4C (standard), 7C or 10C; available for general feeder or microload
Auxiliary switches
Terminal type screw terminals
Rated voltage Operation power AC100 - 120V, AC200 - 240V, DC100 - 125V, DC200 - 250V, DC24V or DC48V
*1: Ambient temperature: 40°C (45°C for marine used)
*2: For vertical terminals
*3: For 2-pole applications, use two poles at both ends.
*4: 4-pole ACBs are not applicable to power distribution IT systems unless N-phase protection is provided.
*5: Varies depending on applicable standards. AC1000V applies to ACBs conforming to IEC60947-2 and JIS C8201-2.
*6: Varies depending on applicable standards. AC690V applies to ACBs conforming to IEC60947-2 and JIS C8201-2.
*7: Setting the instantaneous trip function to NON reduces the rated breaking current to the rated latching current.
*8: Applicable to 3-pole ACBs with INST or MCR.
*9: For applicability to power distribution IT systems, consult us
*
10: A special version of the ACB is necessary above 250V
DC. Contact Terasaki for details.
*11: Expected service life based on endurance test. The service life of ACB depends on the working and environmental conditions. Refer to chapter 6 “Maintenance, Inspection and
Parts Replacement”.
*12: For vertical terminals
*13: This manual covers draw-out type ACBs.
*14: In applying or going to apply.
Use the ACBs in the environmental conditions specified in Table 5.
Table 5 Operating environment
Altitude 2000 m max.
Ambient temperature -5°C to +45°C
Humidity 45 to 85% rel. max.
Vibration 0.7G max.
Shock 200 m/s
2
(20G) max.
Standard
environment
(Standard equipped
ACBs)
Atmosphere
No excessive water vapor, oil vapor, dust, or corrosive gases. No sudden change in temperature and no condensation.
Ammonia (NH
3
): 0.5 ppm max, Hydrogen sulfide (H
2
S)/sulfur dioxide (SO
2
)/hydrogen chloride (HCl): 0.1 ppm max.,
Chlorine (Cl
2
): 0.05 ppm max.
Tropical environment
package
Different from standard ACBs in that Ambient temperature: 60°C max. and Humidity: 95% rel. max. (no condensation)
Cold environment
package
Different from standard ACBs in that Ambient temperature: -25°C min. for use and -40°C min. for storage (no condensation)
Special
environment
(Optional)
Corrosion-resistant
package
Different from standard ACBs in that NH
3
: 50 ppm max, H
2
S: 10 ppm max., SO
2
/HCl: 5 ppm max., and Cl
2
: 1 ppm max.