Installation manual

If a totally external resistor network is used as shown in figure

4.10, the calculated wattage, [W] = 17,000 x C farads, is divided in

half to size the precharge and discharge resistors.

Parameter F.015 should be set to the sum of the wattage for both

resistors.

Installing Circuit Breaker - 8720MC-RPS190

To protect AC input power, install a circuit breaker with

supplemental contact (CB) in the AC input power line. Refer to

Figures 4.6 to 4.8 for wiring. The rated ampacities of the circuit

breakers are as follows:

For Model 8720MC-RPS190BM and 8720MC-RPS190BS units:

350 Amps

The following are the recommended circuit breakers with

supplemental contact.

For Model 8720MC-RPS190BM and 8720MC-RPS190BS units:

Fuji Electric - BU-KSB3350LW

Westinghouse - KDB3350

or equivalent

Because supplemental contact of this circuit breaker does not

conform with load of 5mA, relay with less than 5mA should be

used for connection when a supplemental contact is connected with

sequence input PWR.

Be sure to provide required quantity of circuit breakers with

supplemental contact (CB) for all units connected in parallel (see

Figures 4.6 and 4.7).

Installing ACL Unit (Reactor Assembly) - 8720MC-RPS190

ATTENTION: During operation of the 8720MC-RPS

Regenerative Power Supply, the reactor is at a high

temperature. Do not touch the reactor during

operation or immediately after the unit has been

turned OFF. Failure to observe this precaution could

result in bodily injury.

ATTENTION: During operation of the 8720MC-RPS

Regenerative Power Supply, the reactor operates at a

high temperature. Install the reactor in a location

where high temperature does not present a problem.

The 8720MC-RPS Regenerative Power Supply boosts up and

controls the DC bus voltage, by utilizing the magnetic

characteristics of reactor. Therefore, reactors are required for the

8720MC-RPS Regenerative Power Supply.

Install a single-phase type reactor to each of L

-phase, L

-phase and

-phase. Do not use three-phase AC reactors, since this will cause

unwanted coupling between the phases.

4-26

Wiring