UPS Maintenance Bypass Panels
All UPS Installations benefit when an external "Make Before Break" Maintenance Bypass Panel is included. The reason is that critical equipment powered by a UPS typically cannot be shut down to allow servicing or repair of the UPS serving the loads. The cost is minimal compared to costs and risks of downtime when an external maintenance bypass is not included. Note many UPS manufacturers incorporate an "Internal Maintenance Bypass Circuit". Keep in mind if internal this will be a partial bypass, not a total bypass. The better design is having an external, thus total, bypass. Increasingly, safety rules for service work dictate that serviced equipment must be off, an internal maintenance bypass does not allow this.
Most common configuration for an external maintenance bypass is a three breaker panel. Other configurations include two breaker, four breaker and custom configurations in which the output is a defined set of multiple breakers to allow the UPS to feed multiple load panels without requiring an additional distribution panel. Please feel free to contact us for any custom configuration desired. Visit UPS Installation Configurations - Three Phase to view various configurations that are available.
Below are our standard three breaker offerings. Please contact us if you have a desire for a different configuration or AIC rating.
Voltage |
Breaker |
max KVA Capacity |
Height |
Width |
Depth |
Part # (Use Ctrl-Shift-Minus Sign to rotate pdf dwgs in Adobe) |
|---|---|---|---|---|---|---|
120/208 3 phase |
60 A / EHD 18 kAIC |
17 kVA |
37.4" |
24.1" |
9" |
|
60 A / ED 65 kAIC |
17 kVA |
37.4" |
24.1" |
9" |
||
70 A / EHD 18 kAIC |
20 kVA |
37.4" |
24.1" |
9" |
||
80 A / EHD 18 kAIC |
23 kVA |
37.4" |
24.1" |
9" |
||
90 A / EHD 18 kAIC |
25 kVA |
37.4" |
24.1" |
9" |
||
100 A / ED 65 kAIC |
28 kVA |
37.4" |
24.1" |
9" |
||
125 A / ED 65 kAIC |
36 kVA |
42.4" |
30.1" |
11.8" |
||
150 A / ED 65 kAIC |
43 kVA |
42.4" |
30.1" |
11.8" |
||
175 A / ED 65 kAIC |
50 kVA |
42.4" |
30.1" |
11.8" |
||
200 A / ED 65 kAIC |
57 kVA |
42.4" |
30.1" |
11.8" |
||
225 A / ED 65 kAIC |
64 kVA |
42.4" |
30.1" |
11.8" |
||
250 A / DK 65 kAIC |
72 kVA |
61.3" |
36.1" |
11.8" |
||
300 A / DK 65 kAIC |
86 kVA |
61.3" |
36.1" |
11.8" |
||
350 A / DK 65 kAIC |
100 kVA |
61.3" |
36.1" |
11.8" |
||
400 A / DK 65 kAIC |
115 kVA |
61.3" |
36.1" |
11.8" |
||
277/480 |
Breaker |
max KVA Capacity |
Height |
Width |
Depth |
Part # (to be added 2/28/12) |
125 A / FD 35 kAIC |
83 kVA |
42.4" |
30.1" |
11.8" |
||
125 A / HKD 65 kAIC |
83 kVA |
61.3" |
36.1" |
11.8" |
||
150 A / FD
35 kAIC |
99 kVA |
42.4" |
30.1" |
11.8" |
||
150 A / HKD 65 kAIC |
99 kVA |
61.3" |
36.1" |
11.8" |
||
175 A / FD
35 kAIC |
116 kVA |
42.4" |
30.1" |
11.8" |
||
175 A / HKD 65 kAIC |
116 kVA |
61.3" |
36.1" |
11.8" |
||
225 A / FD
35 kAIC |
149 kVA |
42.4" |
30.1" |
11.8" |
||
225 A / HKD 65 kAIC |
149 kVA |
61.3" |
36.1" |
11.8" |
||
250 A / KD 35 kAIC |
166 kVA |
61.3" |
36.1" |
11.8" |
||
250 A / HKD 65 kAIC |
166 kVA |
61.3" |
36.1" |
11.8" |
||
300 A / KD 35 kAIC |
199 kVA |
61.3" |
36.1" |
11.8" |
||
300 A / HKD 65 kAIC |
199 kVA |
61.3" |
36.1" |
11.8" |
||
350 A / KD 35 kAIC |
232 kVA |
61.3" |
36.1" |
11.8" |
||
350 A / HKD 65 kAIC |
232 kVA |
61.3" |
36.1" |
11.8" |
||
400 A / KD 35 kAIC |
266 kVA |
61.3" |
36.1" |
11.8" |
||
400 A / HKD 65 kAIC |
266 kVA |
61.3" |
36.1" |
11.8" |
||
500 A / LD 35 kAIC |
332 kVA |
69.5" |
38.1" |
11.8" |
||
500 A / HLD 65 kAIC |
332 kVA |
69.5" |
38.1" |
11.8" |
||
600 A / LD 35 kAIC |
399 kVA |
69.5" |
38.1" |
11.8" |
||
600 A / HLD 65 kAIC |
399 kVA |
69.5" |
38.1" |
11.8" |
||
800 A / MDL 50 kAIC |
532 kVA |
77.8" |
36.1" |
11.8" |
||
800 A / HMDL 65 kAIC |
532 kVA |
77.8" |
36.1" |
11.8" |
Available Options Include
- Three Breaker Panels up to and including 600 A may have a 4th breaker added as a second UPS input breaker (i.e. separate main and bypass input breakers) and/or breaker as a main output or load breaker. For 400 A up to three distribution breakers may be added. Visit the links to see these one line configurations in a system level drawing.
- Kirk Key Interlock
- Solenoid Controlled Interlocks
- Auxilliary contacts on breakers to allow remote breaker status monitoring