The RW overload relays protect loads against overheating caused by overloads or phase loss. When we have an overload or a phase loss in the circuit, the motor current increases. Such current rise activates the tripping mechanism that will actuate on the auxiliary contacts 95-96 (NC) and 97-98 (NO). The auxiliary contacts disconnect the load by means of a contator. The time for disconnection is related to the overload current and the current set on the relay, which is properly represented on the relay tripping curve. After the trip, it is necessary to wait for the system to reestablish in order to do the reset, which can be done automatic or manually.
Specifications
| Reference | RW67 |
|---|---|
| Number of poles | 3 poles |
| Mounting type | Direct |
| Contactor model | CWB40-80 |
| Mounting configuration | 5D |
| Rated insulation voltage Ui | 690 V |
| Rated insulation voltage Ui (acc. to UL) | 600 V |
| Rated impulse withstand voltage Uimp | 6 kV |
| Rated operational frequency | 25...400Hz |
| Suitable for use with DC loads | Yes |
| Maximum operating frequency | 15 ops./h |
| Degree of protection - main terminals | IP10 |
| Degree of protection - auxiliary terminals | IP20 |
| Current range | 25-40 A |
| Max. Fuse (type 2 coordination) | 90gL/gG |
| Short circuit protection with fuses (gL/gG) | 6gL/gG |
| Height | 73 mm / 2.87 in |
| Width | 50 mm / 1.97 in |
| Depth | 106 mm / 4.17 in |
| Gross weight | 0,320 kg / 0.71 lb |
Characteristics
- Available in the three-pole and two-pole versions
- Tripping thermal class 10
- Direct coupling to the compact contactor line of 7 to 32A (CW07, CWC07…025) and contactors of 9…140 A (CWM9…105 and CWB 9…125) without requiring accessories
- Accessory enables mounting on DIN rail 35mm (EN 50022) or tightened with screws
- Developed in compliance with the standards: IEC 60947-4-1, IEC 60529, IEC 60068, VDE 0106, UL-508
- Main homologations: UL, CE, IRAM, BV, NOM ANCE, RCC, PCT
Applications
The RW overload relays were designed to protect three-phase and single-phase AC motors, and DC motors. If the RW overload relays are used in the protection of single-phase AC loads or DC loads, the wiring diagrams presented in this catalog must be respected.