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2 Installing the Instrument
Power Cable Connections
Compliance to all regulations for the operation of and connection to the public grid of
energy back-feeding equipment is required.
Connections must be made by a qualified electrician who knows about energy back-
feeding equipment to ensure that all applicable safety requirements have been
applied and all necessary conditions have been met. Knowledge about 3-phase mains
circuits and all applicable safety standards and requirements is also required.
An AC mains power cable is not provided with the unit.
Refer to the following table for the maximum current capacity requirements for each cable conductor.
If required by local electrical codes, install a fuse or circuit breaker between the ac mains and the unit.
Refer to the following table for current ratings.
Keep the AC mains cables as short as possible. The longer the cable, the greater the voltage loss due
to cable resistance.
The cable cross-section must be suitable for the maximum input current of the
instrument. The ground cable must have the same cross-section as the phase cable.
Safety agency requirements dictate that there must be a way to physically disconnect
the AC mains cable from the unit. A disconnect device, either a switch or circuit
breaker must be provided in the final installation. The disconnect device must be
close to the equipment, be easily accessible, and be marked as the disconnect device
for this equipment. It must meet the input ratings requirements listed in the following
table.
Model
RP7931A, RP7932A, RP7951A
RP7941A, RP7942A, RP7961A
RP7933A, RP7935A, RP7936A, RP7952A, RP7953A
RP7943A, RP7945A, , RP7946A, RP7962A, RP7963A
Either a delta-type or a Y-type AC mains distribution can be used, provided that the correct line-to-line
voltage is applied (see above). Do not connect the neutral wire on Y-type AC mains distribution. An
earth-ground to chassis-ground connection through a separate conductor must always be provided.
74
Unit Rating
L1 I max
5 kW - 200/208 VAC
19.5 A
5 kW - 400/480 VAC
9.5 A
10 kW - 200/208 VAC
39 A
10 kW - 400/480 VAC
19 A
Keysight RP7900 Series Operating and Service Guide
L2 I max
L3 I max
19.5 A
19.5 A
9.5 A
9.5 A
39 A
39 A
19 A
19 A
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