The EF370-380 is an self-supplied electronic overload relay, which means no extra external supply is needed. It offers reliable and fast protection for motors in the event of overload or phase failure. Easy to use like a thermal overload relay and compatible with standard motor applications, the electronic overload relay is convincing, above all, due to its wide setting range, high accuracy, high operational temperature range and the possibility to select a trip class (10E, 20E, 30E). Further features are the temperature compensation, trip contact (NC), signal contact (NO), automatic- or manual reset selectable, trip-free mechanism, STOP- and Test function and a trip indication. The overload relays are connected directly to the contactors. EF370 has ATEX and IECEx certification 1)
Technical
| Item |
Value |
| Setting Range |
115 ... 380 A |
| Rated Operational Voltage |
Auxiliary Circuit 600 V AC/DCMain Circuit 1000 V AC |
| Rated Operational Current (Ie) |
380 A |
| Rated Frequency (f) |
Auxiliary Circuit 50 HzAuxiliary Circuit 60 HzAuxiliary Circuit DCMain Circuit 50 HzMain Circuit 60 Hz |
| Rated Impulse Withstand Voltage (Uimp) |
Auxiliary Circuit 6 kVMain Circuit 8 kV |
| Rated Insulation Voltage (Ui) |
1000 V |
| Number of Poles |
3 |
| Number of Auxiliary Contacts NC |
1 |
| Number of Auxiliary Contacts NO |
1 |
| Number of Protected Poles |
3 |
| Conventional Free-air Thermal Current (Ith) |
Auxiliary Circuit NC 5 AAuxiliary Circuit NO 5 A |
| Rated Operational Current AC-15 (Ie) |
(240 V) NC 3 A(240 V) NO 3 A(400 V) NC 1.1 A(400 V) NO 1.1 A(500 V) NC 0.75 A(500 V) NO 0.75 A |
| Rated Operational Current DC-13 (Ie) |
(125 V) NC 0.55 A(125 V) NO 0.5 A(24 V) NC 1.5 A(24 V) NO 1.5 A(250 V) NC 0.27 A(250 V) NO 0.27 A(60 V) NC 0.55 A(60 V) NO 0.55 A |
| Degree of Protection |
Housing IP20Main Circuit Terminals IP00 |
| Pollution Degree |
3 |
| Connecting Capacity Auxiliary Circuit |
Flexible with Ferrule 1/2x 0.75 ... 2.5 mm²Flexible with Insulated Ferrule 1/2x 0.75 ... 2.5 mm²Flexible 1/2x 0.75 ... 2.5 mm²Rigid 1/2x 1 ... 4 mm² |
| Connecting Capacity Main Circuit |
Hole Diameter > 10 mm²Rigid or Flexible with Cable Lug 1x 50 ... 240 mm²Rigid or Flexible with Cable Lug 2x 50 ... 150 mm² |
| Tightening Torque |
Auxiliary Circuit 0.8 ... 1.2 N·mMain Circuit 28 N·m |
| Wire Stripping Length |
Auxiliary Circuit 9 mm |
| Recommended Screw Driver |
Auxiliary Circuit Pozidriv 2 |
| Mounting Position |
1 ... 6 |
| Power Loss |
at Rated Operating Conditions per Pole 0.37 ... 4.043 W |
| Suitable For |
A210A260A300AF210AF260AF300AF265AF305AF370 |
| Standards |
IEC/EN 60947-1IEC/EN 60947-4-1IEC/EN 60947-5-1UL 60947-1UL 60947-4-1 |
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