Fuji Electric frenic mini series, Руководство пользователя

Страница: 92 / 269

6-10
Table 6.6 lists the relationship between the rated leakage current sensitivity of ELCBs (with the
exception of those exclusively designed for protection from ground faults) and wiring length of the
inverter output circuits. Note that the sensitivity levels listed in the table are estimated values based
on the results obtained by the test setup in the FUJI laboratory where each inverter drives a single
motor.
Table 6.6 Rated Current Sensitivity of Earth Leakage Circuit Breakers (ELCBs)
0.1 0.68
0.2 1.4
0.4 2.3
0.75 3.6
1.5 6.5 30mA 200mA
2.2 9.2
3.7, 4.0 15
5.5 22
7.5 29
0.4 1.2
0.75 1.8
1.5 3.3
2.2 4.6 200mA 500mA
3.7, 4.0 7.5
5.5 11
7.5 14.5
Wiring length and current sensitivity
50m 100m 200m 300m
100mA
30mA 100mA
Power
supply
voltage
Three-
phase
200 V
Three-
phase
400 V
Applicable
motor
rating
(kW)
Rated current
of applicable
motor
(A)
10m 30m
- Values listed above were obtained using FUJI's ELCB EG or SG series applied to the test setup.
- The rated current of applicable motor rating indicates values for FUJI's standard motor (4 poles, 50 Hz
and 200 V 3-phase).
- The leakage current is calculated based on grounding of the single wire for 200V
∆
type and the
neutral wire for 400V Y type power lines.
- Values listed above are calculated based on the static capacitance to the earth when the 600V class of
vinyl-insulated IV wires are used in a metal conduit laid directly on the earth.
- Wiring length is the total length of wiring between the inverter and motor. If more than one motor is
to be connected to a single inverter, the wiring length should be the total length of wiring between the
inverter and motors.
[ 2 ] Surge Killers
A surge killer eliminates surge currents induced by lightning and noise from the power supply lines.
Use of a surge killer is effective in preventing the electronic equipment, including inverters, from
damage or malfunctioning caused by such surges and/or noise.
The applicable model of surge killer is the FSL-323. Figure 6.3 shows its external dimensions and a
connection example. Refer to the catalog "FUJI Noise Suppressors (SH310)" for details. These
products are available from Fuji Electric Technica Co., Ltd.
Figure 6.3 Dimensions of Surge Killer and Connection Example