MGE UPS Systems EPS 7000 user manual Specifications, Circuit Breakers and Powerflow Diagrams, QF1

Users Manual

1.4 Specifications, Circuit Breakers and Powerflow Diagrams

1.4.1 Circuit Breakers

EPS 7000 circuit breakers (except the battery disconnect circuit breaker QF1) are located behind the doors of the Input/Output cabinet. Following is a brief description of the available circuit breakers and contacts, and their function (Figures 1-2, 1-3, and 1-4).

Q1	Input isolation circuit breaker, used to isolate the UPS from the main AC input (mains 1) and provide
	input current protection.
QF1	Battery disconnect circuit breaker, external to the UPS, used to disconnect the battery from the UPS.
	QF1 provides isolation and protection between the UPS and its battery system.
Q3BP	(optional) Maintenance bypass circuit breaker, used to supply the attached load via the bypass source
	while the UPS is being serviced.
Q5N	Optional UPS isolation circuit breaker, used to isolate the UPS module from the attached load.
Q4S	Bypass input circuit breaker; it is used to isolate the UPS from the bypass input (mains 2) source and
	provide back-feed protection.

Figure 1-2: Circuit Breaker Locations on the EPS 7000.

MULTI-SLOT (OPTION)

MODEM AND PWR

SUPPLY (OPTION)

BYPASS

STATIC

SWITCH

RECTIFIER

OUTPUT

STATIC

SWITCH

SERIES

FILTER

CHOKES

CONTROL

FUSES

Q1

INPUT CB

Q4S

BYPASS CB

INPUT

FUSES

BLOWERS (4X)

BLOWERS (4X)

BLOWERS (3X)

RAUZ2 PCA (OPT)

RAUZ PCA

IBEZ PCA

OBEZ PCA

BAIZ1 PCA

TREZ PCA

SSSZ PCA

ALBZ PCA

EPOZ PCA

INVERTERS (6X)

DC CAPS

ACOZ PCA

ACUZ PCA

ARUZ PCA

OUTPUT XFMR (BEHIND PANEL)

CARD CAGE

ALEZ PCA

AROZ—US PCA

CROZ—US PCA

CRIZ—US PCA

SRIZ PCA

GTCZ—7000 PCA

GT2Z—7000 PCA (OPT.)

INPUT FILTER (3X)

OUTPUT FILTER (4X)

FAN XFMRS GUI POWER SUPPLY

OUTPUT FUSES

INPUT FILTER FUSES

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