Pr.70 Special regenerative brake duty = 10% (for 7.5K or lower) or 6% (for 11K or higher) (Refer to page 743 .) When the regenerative brake transistor is damaged, the following sequence is recommended to prevent overheat and burnout of the brake resistor. Thermal relay Thermal relay Power Supply Power Supply *1 Since the FR-A820-00630(11K) or higher and FR-A840-00310(11K) or higher are not provided with terminal PX, a jumper need not to be removed. *2 Refer to the following table for the thermal relay models for each capacity. Refer to the following diagram for the connection.
(Always install a thermal relay when using a brake resistor for the inverters with 11K or higher capacity.) 1/L 1 5/L 3 2/T 1 6/T 3 To the inverter P/+ terminal To the FR-ABR Connection of a brake resistor other than the FR-ABR A brake resistor can be used with the FR-A820-01250(22K) or lower and the FR-A840-01800(55K) or lower. Use a brake resistor that has resistance and power consumption values higher than the following. Also, the brake resistor must have a sufficient capacity to consume the regenerative power. 100 2. INSTALLATION AND WIRING 2.10 Connection of stand-alone option units MC r ly T F MC OFF ON OCR Inverter R/L1 P/+ S/L2 (P3) T/L3 PX PR (OCR)(∗2) FR-ABR R Disconnect jumper.
(∗1) MC r ly T F OFF ON MC OCR Inverter R/L1 P/+ S/L2 (P3) T/L3 PX PR B C (OCR)(∗2) FR-ABR R Disconnect jumper. (∗1) Power supply voltage High-duty brake resistor Thermal relay model (Mitsubishi electric product) Rated operating current 200 V FR-ABR-0.4K TH-T25-0.7A 120 VAC: 2 A (NO contact) / 3 A (NC contact), 240 VAC: 1 A (NO contact) / 2 A (NC contact) (AC15 class) 110 VDC: 0.2 A, 220 VDC:
0.1 A (DC13 class) FR-ABR-0.75K FR-ABR-2.2K TH-T25-1.3A TH-T25-2.1A FR-ABR-3.7K TH-T25-3.6A FR-ABR-5.5K TH-T25-5A FR-ABR-7.5K TH-T25-6.6A FR-ABR-11K TH-T25-11A FR-ABR-15K TH-T25-11A FR-ABR-22K TH-T65-22A 400 V FR-ABR-H0.4K TH-T25-0.24A FR-ABR-H0.75K TH-T25-0.35A FR-ABR-H1.5K TH-T25-0.9A FR-ABR-H2.2K TH-T25-1.3A FR-ABR-H3.7K TH-T25-2.1A FR-ABR-H5.5K TH-T25-2.5A FR-ABR-H7.5K TH-T25-3.6A FR-ABR-H11K TH-T25-6.6A FR-ABR-H15K TH-T25-6.6A FR-ABR-H22K TH-T25-9A Voltage class Inverter Minimum resistance (Ω) Power consumption (kW) 200 V class FR-A820-00046(0.4K) 100 1.44 FR-A820-00077(0.75K) 80 1.81 FR-A820-00105(1.5K) 50 2.89 FR-A820-00167(2.2K) 33 4.38 FR-A820-00250(3.7K) 30 4.81 FR-A820-00340(5.5K) 18 8.02 FR-A820-00490(7.5K) 18 8.02 FR-A820-00630(11K) 12 12.0 FR-A820-00770(15K) 8.5 17.0 FR-A820-00930(18.5K) 6.5 22.2 FR-A820-01250(22K) 6.5 22.2