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In the individual UPS modules:
• Input (isolation) circuit breaker Q1 is in the OFF (open) position.
• Battery disconnect circuit breaker QF1 is in the OFF (open) position.
• Output isolation circuit breaker Q5N is in the OFF (open) position.
In the SSC:
• System maintenance bypass circuit breaker Q3BP is in the OFF (open) position (if
present).
• System output isolation circuit breaker Q5N is in the OFF (open) position (if
present).
• Input power supply switches SW1 and SW2 are in the ON (closed) position.
• The upstream bypass AC input (mains 2) circuit breaker (Q4S, customer-supplied)
is in the OFF (open) position.
• If present, the upstream maintenance bypass circuit breaker (customer-supplied) is
in the OFF (open) position.
The following start-up procedure should be performed
during the initial start-up following installation of the system,
and this sequence should be followed any time that the EPS 6000 UPS system is being
restarted from an off condition (i.e., after the UPS has been powered down by removing the
upstream AC input power and opening all the circuit breakers of the UPS system).
a. Apply power to Q4S by closing the upstream circuit breaker supplying Q4S,
and the upstream circuit breaker supplying the optional
maintenance bypass input (if present).
b. Apply power to the UPS modules by closing the upstream circuit breaker supplying
the main AC input (mains 1).
c. Start the SSC:
1. Close the optional system maintenance bypass circuit breaker Q3BP (if
present, in the maintenance bypass cabinet). Power is now available at the
SSC output (the load is energized) via the maintenance bypass source.
2. Close the upstream circuit breaker Q4S that supplies the bypass input to
the SSC. The SSC will come on-line; after about ten (10) seconds, the
wrap-around circuit breaker Q2S will automatically close.
3. Close the optional system isolation circuit breaker Q5N (if present, in the
maintenance bypass cabinet).
4. Open the optional system maintenance bypass circuit breaker Q3BP
(if present). The SSC is now on-line and the load is supplied
via the bypass source.
Note that if your SSC configuration does not include the maintenance bypass option,
start-up requires only closing Q4S to supply the bypass source to the SSC.
All other functions are fully automatic.
2.4.2 Start-up
2 — 30 Operation
EPS 6000 UPS Shared Systems