Overload relays are intended to protect motors, controllers, and branch-circuit conductors against excessive heating due to prolonged motor overcurrents up to and including locked rotor currents. Protection of the motor and the other branch-circuit components from higher currents, due to short

Find heater table number below, using the Product Class, Controller Size and Phase. Heater table number is found in the column under the type of overload and phase. Refer to the specified table and use the controller size and motor amps to select the heater catalog number.

Mar 26, 2021 · Class 9065 Catalog for Overload Relays and Thermal Unit Selection. This document also includes application data and approximate dimensions.

Allen-Bradley standard overload relay protection is provided using Type W heater elements for the 500 Line. This provides Class 20 operation and is recommended for General Applications. Specific Applications may require Class 10 or Class 30 overload relays. Class 10 overload relays are often used with hermetic

Controller Size Motor Amp Phase 1. Find heater table number below, using the Product Class, Controller Size and Phase. Heater table number is found in the column under the type of overload and phase. 2. Refer to the specified table and use the controller size and motor amps to select the heater catalog number. a. If motor amps are not known, an

For Type A and B Overload Relays, Size 5, 6 Starters. Full Load Current of Motor (Amps.) Heaters - For MS Starters.

Selection of an adequate motor protection is of great importance with regard to the operational reliability and service life of a motor. The effectiveness of the available motor protection devices depends on the range of application. The following shows …

For motor overload protection applications above 100 A in current sensing capability, the E100 relay offers functionality with external CT configurations up to 800 A maximum capacity (Cat. No. 193-1EF_Z).

For continuous rated motors with no service factor, multiply the full-load current of the motor by 0.90 and use this value to select the heater. The table below should be used to determine which column of motor full load amperes applies for heater selection.

Table 43 Type A thermal units for full-load currents lower than those listed in this table are available. For complete information, consult Customer Care Center at 1-888-778-2733. This device will accept Type SB slow trip (Class 30) thermal units. For selection, see Selecting Slow Trip Thermal Units.