TECO-Westinghouse EQ7 Series, Инструкция по эксплуатации

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2-16
Figure 2.7 Inserting/Removing the Jumpers
To remove each of the jumpers, pinch its upper side
between your fingers, unlock its fastener, and pull it up.
When mounting it, fit the jumper over the connector until it
snaps into place.
Main circuit power input terminals L1/R, L2/S, and L3/T (three-phase input)
The three-phase input power lines are connected to these terminals.
1) For safety, make sure that the molded case circuit breaker (MCCB) or magnetic contactor (MC) is turned OFF
before wiring the main circuit power input terminals.
2) Connect the main circuit power supply wires (L1/R, L2/S and L3/T) to the input terminals of the inverter via an
MCCB or residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB)*, and an MC if
necessary.
It is not necessary to align phases of the power supply wires and the input terminals of the inverter with each other.
* With overcurrent protection
It is recommended to insert a manually operable magnetic contactor (MC) that allows you to disconnect the
inverter from the power supply in an emergency (e.g., when the protective function is activated), preventing a
failure or accident from causing secondary disasters.
Auxiliary control power input terminals R0 and T0 (on inverters of 2 HP or above)
In general, the inverter runs normally without power supplied to the auxiliary control power input terminals R0 and T0. If
the inverter main power is shut down, however, no power is supplied to the control circuit so that the inverter cannot
issue a variety of output signals or display on the keypad.
To retain an alarm output signal ALM issued on inverter's programmable output terminals by the protective function or
to keep the keypad alive even if the main power has shut down, connect the auxiliary control power input terminals R0
and T0 to the power supply lines. If a magnetic contactor (MC) is installed in the inverter's primary circuit, connect the
primary circuit of the MC to these terminals R0 and T0.
Terminal rating:
200 to 240 VAC, 50/60 Hz, Maximum current 1.0 A (230 V series with 40 HP or below)
200 to 230 VAC, 50/60 Hz, Maximum current 1.0 A (230 V series with 50 HP or above)
380 to 480 VAC, 50/60 Hz, Maximum current 0.5 A (460 V series)
When introducing a residual-current-operated protective device (RCD)/earth leakage circuit breaker (ELCB),
connect its output (secondary) side to terminals R0 and T0. Connecting its input (primary) side to those
terminals causes the RCD/ELCB to malfunction since the input power voltage to the inverter is three-phase but
the one to terminals R0 and T0 is single-phase. To avoid such problems, be sure to insert an isolation
transformer or auxiliary B contacts of a magnetic contactor in the location shown in Figure 2.8.
Figure 2.8 Connection Example of Residual-current-operated Protective Device (RCD)/
Earth Leakage Circuit Breaker (ELCB)