Dell 5600R OL HV-US Typical External Isolating Device Installation, Backfeed Protection Devices

5Insert the conduit through the wiring access entry and attach the conduit fitting to the panel. Strip 0.5” (1.5 cm) of insulation from the end of each incoming wire.

CAUTION: If the UPS does not have an automatic protection device against current backfeed, Dell recommends installing an external isolating device (see Figure 19). After the device is installed, you must add a warning label with the following wording or the equivalent on the external AC contactor:

RISK OF VOLTAGE BACKFEED. Isolate the UPS before operating on this circuit, then check for hazardous voltage between all terminals.

External Distribution Panel

QT

L/L1

N/L2

B

UPS

L/L1

N/L2

Legend

BCoil Remote Switch

QMagneto-Thermal Input Main Switch

TAC Contactor ( see Table 1)

N/L2 Neutral/L2

L/L1 L1 Line Input

Figure 19. Typical External Isolating Device Installation

The following table lists AC contactors that can be used as backfeed protection devices.

Table 1. Backfeed Protection Devices

Manufacturer	Type	Rating
Tianshui 213 Electrical Apparatus Co., Ltd.	GSC1(CJX4-d)-4011	220-240 Vac, 42 FLA
(E203071)
Moeller GMBH	DILM(C)32-10	600 V, 40A
LS Industrial Systems Co., Ltd. (E108780)	GMC(D)-32	600 Vac, 45A

Installation 29