Three-pole Thermal Overload Relays
Three-pole thermal overload relays designed to protect ac circuits against overloads, phase failure, long starting times and prolonged stalling of the motor.
Adjustable relay setting dial
Test button
Stop button
Manual/auto reset
Trip indicator
Sealable cover
1N/O & 1N/C auxiliary contacts
Direct mounting beneath three-pole contactors or independent mounting on DIN rail
Insulation voltage 600V, Withstand Voltage 6kV
Dimensions when mounted on an ac contactor
Contactor Rating(kW)
H (mm)
W (mm)
D (mm)
4 - 9
123
45
86
11 - 18.5
137
45
92
22 - 37
175
75
123
45
178
85
129
59 - 80
267
120
136
Dimensions when mounted on a dc contactor
Contactor Rating (kW)
H (mm)
W (mm)
D (mm)
4 - 9
123
45
95
11 - 18.5
137
45
101
Approvals
UL and CSA
Technical note for Thermal Overload Relay, 0.25 → 0.4 A, 400 mA
When a thermal overload relay is situated in the motor line of standard Star-Delta arrangement i.e. in series with the cables which lead to the motor. The overload rating is calculated by 0.58 x Motor Rating Current.
Overload
