- Toolless contactor disassembly (sizes 00 to 4) - allows quick access for inspection and maintenance
- Just release 2 retainers and pull a clip to get at magnet, coil and contacts
- Current carrying components - contact tips are weld resistant silver cadmium oxide (fine silver on sizes 00 and 0 only)
- Contacts are installed in a wedge configuration for positive make with minimum bounce
- Class 20 overload protection
- Visual trip indicator with manual reset - to avoid surprise restarts
- Reset occurs on arm upstroke so a tripped condition cant be overridden by holding the arm down
- Manual weld check - provides a convenient test against welding of overload relay contacts
- Just depress the weld check operator to trip the relay, run a simple continuity test across the relay contacts, then depress the manual reset to return the starter to service
- Dual bimetals - anticipate overloads, responding to rising current and temperature with faster tripping on severe overloads for better motor protection
- Trip points are factory calibrated for accuracy
- +/-10% trip adjustment - by turning a dial in the overload relay face allows "tuning" the protection to the motor on the spot
Specifications
Brand: ABB
Amperage Rating: 540 A
Auxiliary Contact Rating: 3NO
Coil Voltage: 115 to 120 VAC
Dimensions: 22.44 in H x 11.5 in W x 10.19 in D
Enclosure Type: Open
Frequency Rating: 50/60 Hz
Number of Poles: 3
Operating Cycles: 1000000 Cycles
Operating Temperature: -25 to 40 deg C
Overload Relay: 3-Leg Block/Thermal
Reset Type: Manual
Series: CR306/300-Line
Type: Full Voltage Magnetic Non-Combination Non-Reversing
Voltage Rating: 600 VAC
Connection type: Line/Load
Manufacturer Name: ABB
UNSPSC: 0
UPC: 00783166362877
Item FeaturesMotor Control Center, Custom Type Control Panel, Switchgear Equipment, Electrical Distribution and Control Applications
Item FeaturesHolding Interlock, Pressure Terminal and 3-Leg Block Type Overload Relay
Item Features
Item FeaturesARRA Compliant|Buy American Act Compliant|RoHS Compliant