UL 489 circuit breakers designed for UL1778 UPS applications
2 breaker, 3 breaker & custom designs
208, 360, 480 VAC 50/60Hz. nominal 3Ø AC bus
100A to 1200A capacities for 30kVA to 750kVA UPS
Increased capacities available
Shunt trip (120vac), UVR (24v) & EPO interface are standard
Kirk-Key® type safety keyed interlock
Solenoid key release unit (SKRU)
NEMA 1 wall/floor mounting
Zero phase shift voltage conversion transformers(optional)
Static transfer switches (optional)
Compatible with Liebert, MGE, Powerware, Mitsubishi, GE, Toshiba, APC & more
FOR ALL MAJOR UPS BRANDS
Completely isolates the UPS
from utility AC voltage
allows major maintenance from utility AC voltages
no disruption to critical load
reduces need for off-hours service
reduces maintenance costs
allows 95% faster UPS replacement if necessary without dropping the critical load!
many sizes in stock ready to ship
Wall-Mount Nema Configuration Bypass Panels
Make-before-break; Kirk-Key, Shunt Trip, Aux Contacts, SKRU. 35kAIC standard Free-standing floor
when input voltage to UPS is different from output, consult with SBS engineering services
kVA
Voltage
Amperage
Round-Up
Breaker
kAIC
Height
Width
Depth
Weight
Input
Output
"AF"
"AT"
Quan
Inches
Inches
Inches
LBS.
30
208
208
150
104
2
65
74.2
31
14
382
208
208
150
104
3
65
74.2
31
14
389
480
480
100
45
2
35
74.2
31
14
382
480
480
100
45
3
35
74.2
31
14
389
40
208
208
150
139
2
65
74.2
31
14
382
208
208
150
139
3
65
74.2
31
14
389
480
480
100
60
2
35
74.2
31
14
382
480
480
100
60
3
35
74.2
31
14
389
50
208
208
250
173
2
65
74.2
31
14
382
208
208
250
173
3
65
74.2
31
14
389
480
480
150
75
2
35
74.2
31
14
382
480
480
150
75
3
35
74.2
31
14
389
65
208
208
250
226
2
65
74.2
31
14
382
208
208
250
226
3
65
74.2
31
14
389
480
480
150
98
2
35
74.2
31
14
382
480
480
150
98
3
35
74.2
31
14
389
80
208
208
400
278
2
65
82.4
40
14
560
208
208
400
278
3
65
82.4
40
14
569
480
480
150
120
2
35
74.2
31
14
382
480
480
150
120
3
35
74.2
31
14
389
100
208
208
400
347
2
65
82.4
40
14
560
208
208
400
347
3
65
82.4
40
14
569
480
480
150
150
2
35
74.2
31
14
382
480
480
150
150
3
35
74.2
31
14
389
130
208
208
600
451
2
65
90.7
40
14
597
208
208
600
451
3
65
90.7
40
14
604
480
480
250
195
2
35
74.2
31
14
382
480
480
250
195
3
35
74.2
31
14
389
160
208
208
600
555
2
65
90.7
40
14
597
208
208
600
555
3
65
90.7
40
14
604
480
480
250
241
2
35
74.2
31
14
382
480
480
250
241
3
35
74.2
31
14
389
225
208
208
800
781
2
65
90.7
40
14
597
208
208
800
781
3
65
90.7
40
14
604
480
480
400
338
2
35
82.4
40
14
560
480
480
400
338
3
35
82.4
40
14
569
300
480
480
600
451
2
35
90.7
40
14
597
480
480
600
451
3
35
90.7
40
14
604
400
480
480
600
601
2
35
90.7
40
14
597
480
480
600
601
3
35
90.7
40
14
604
500
480
480
800
752
2
65
90.7
40
14
608
480
480
800
752
3
65
90.7
40
14
619
625
480
480
1200
940
2
65
90.7
40
14
608
480
480
1200
940
3
65
90.7
40
14
619
750
480
480
1200
1128
2
65
90.7
40
14
608
480
480
1200
1128
3
65
90.7
40
14
619
Most
Common
Sizes
"AF" Frame Size- Trip Setting is Less
Also known as a Maintenance Bypass Switch (MBS) or Maintenance ByPass Switch (MBPS), the bypass can be configured in 2, 3, 4, 5 & more breaker configurations; the most critical being the "maintenance bypass breaker" (MBP), the 'bypass input breaker (BIB) & in 3 device configurations the "maintenance isolation breaker-switch" (MIS). The purpose is to electrically isolate the UPS from the critical load without disrupting or turning off power to that load. This allows all maintenance, service & inspections to be performed to the unpowered, de-energized UPS faciliting all work to be conducted with optimum safety & during any time period. In fact, an MBP allows for the complete removal & replacement of a UPS in only a few hours while the connected critical load remains operational. It is an essentail part of a "level of nine's" availability solution.
