Bulletin 193-M Bimetallic Overload Relays

Specifications

Thermal Overload Relays

Circuit Diagrams

2-phase

3-phase

Trip Characteristics

Time/current characteristics of thermal overload relay
- Mean value of tolerance bands 3-phase heated. Full line curves relate to cold relay. Dashed curves relate to relay at operating temperature (at set current load).
- Tolerance trip time ±20%, ±10% for current.
- Function limits and temperature compensation from –25 °C…+75 °C.
- Tripping limit specified in IEC 60947-4 for –5 °C…+40 °C are included in the –20 °C…60 °C range.
- Specified points relative to operating temperature condition; in compliance with IEC 60947-4.
Single phasing (phase failure):
- Trip limits 1.05…1.25 of set current I_e_F (1.05…1.32 I_e_F is permissible according to IEC 60947-4).
- For motors up to 10 kW, the 2-phase trip at 1.25 I_e_F max. guarantees heat buildup limitation to the value that occurs in the event of a 3-phase trip at 1.2 I_e_F.

Main Circuit
Rated Insulation Voltage
	IEC cULus	[V] [V]	500 600
Max. Wire Size
IEC cULus	Fine Stranded w/ Ferrule Coarse Stranded or Solid Stranded or Solid	[mm²] [mm²] [AWG]	2 x (1…2.5) 2 x (1.5…4) 2 x (14…10)
Recommended Torque		[Nm] [lb•in]	1.4…2.0 12…20
Control Circuit
Rated Insulation Voltage
	IEC cULus	[V] [V]	500 AC 600 AC
Rated Operating Current
	AC-12 AC-15 220…240V 380…415	[A] [A] [A]	4 3 1.6
Max. Wire Size
IEC cULus	Fine Stranded w/ Ferrule Coarse Stranded or Solid Stranded or Solid	[mm²] [mm²] [AWG]	2 x (0.75…2.5) 2 x (0.75…4) 2 x (18…14)
Recommended Torque		[Nm] [lb•in]	1.2 11
General
Standards Compliance			IEC60947, DIN VDE 0660, UL508, CSA22.2, No. 14
Approvals			CE, cULus
Ambient Temperature
	Open Enclosed		-20…+60 °C (-4…+140 °F) -20…+40 °C (-4…+104 °F)