Operator`s manual

2.2 Bypass Switch Installation
CAUTION: The installation and testing of the Bypass Switch must be performed only by
qualified personnel familiar with installing electrical equipment. This must be done in
accordance with the rules and regulations of local and national electrical codes.
The installation of a bypass circuit breaker is required. To select the proper size
circuit breaker refer to Table 2.
Procedure:
1. Select an appropriate location for the Bypass Switch (and Bypass Transformer if
required). The Bypass Switch can be mounted to a wall close to the UPS. The Bypass
Transformer can be either wall or floor mounted.
2. Connect the BPS (and BPT if required) to the UPS and utility following the sche-
matic wiring diagram applicapable to your configuration as specified in Table 1. Refer
also to Table 2 to select the proper size circuit breaker and wire gauge.
3. Before placing the BPS-UPS into service, perform the test procedure outlined in
section 3.1 of this manual. It is important that both sources of power are “in phase” to
provide trouble free Bypass Switch operation.
UPS
MODEL
CFR 1500 12.5A 15A #14 AWG 8A 15A #14 AWG #14 AWG
(or smaller)
CFR 2000 17A 20A #12 AWG 11A 15A #14 AWG #12 AWG
CFR 2500 21A 30A #10 AWG 13A 15A #14 AWG #10 AWG
CFR 3000 25A 40A #8 AWG 16A 20A #12 AWG #8 AWG
CFR 4000 33A 50A #6 AWG 21A 30A #10 AWG #6 AWG
CFR 5000 41A 60A #6 AWG 27A 40A #8 AWG #6 AWG
CFR 7.5K 36A 50A #6 AWG 40A 50A #6 AWG n/a
CFR 10K 48A 60A #6 AWG 53A 70A #4 AWG n/a
CFR 15K 72A 90A #3 AWG 80A 100A #3 AWG n/a
SYSTEMS WITH
BYPASS TRANSFORMER
Wire Size for
208VAC or
240VAC Load
Table 2.
Bypass Circuit Breaker current rating.
Max. UPS
Output
Current
Bypass
CB
Rating
Wire Size Input
Rating
of BPT
at
208VAC
Bypass
CB
Rating
Wire Size for
120VAC Load
Current ratings for CFR 5000 and smaller units are based on 120V rated output.
This is because the rated output of L1 is capable of supplying the full 120V current.
Current ratings for CFR 7.5K - 15K are based on the maximum current rating for L1 and
L2 combined (refer to the appropriate Operator’s Manual for further details).
Wire sizes are based on three current carrying copper conductors rated at 75 deg. C and
are guidelines only. Always follow your local electrical code.
SYSTEMS WITHOUT
BYPASS
TRANSFORMER
5
Figure 6.
System Bypass Schematic
208V IN - 120V/208V OUT
16
NOTES:
1. The UPS will be internally configured for either 208V or 240V.
Check the nameplate rating of the UPS to verify the correct voltage.
2. Omit this connection if 120V output is not required or available.
5. SCHEMATIC DIAGRAMS 2. INSTALLATION