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Thermal Overload Relays

A wide range of bimetal "Thermal Overload Relays" are offered for close protection of motors & other inductive loads against overload, single phasing & unbalanced system voltages.

Features :

  • Protection against overload & single phasing
  • Auto manual / manual reset facility
  • Ambient temperature compensated
  • Contactor mounting / Individual mounting with adaptor
  • Matching to contactor rating upto 95A

Thermal Overload Relay
Oveload Relay
Type
Electronic
Type of Reset
Auto/Manual
Manual
Contactor Mounting
A
0.1-93
0.1-80
Individual Mounting (with adaptor)
A
0.1-93
0.1-80
Rated Insulation Voltage (Ui)
V
750
750
Rated Operational Voltage (Ue)
V
415
415
Switching Frequency
OPS./Hr
15
15
Terminal Capacity
Contactor Mounting (RT 21)(RT 11)
Sq. mm
10
10
Contactor Mounting (RT 22)(RT 12)
Sq. mm
25
50
Contactor Mounting (RT 23)(RT 13)
Sq. mm
50
50
Auxilliary Circuit
Insulation Voltage
V
750
750
Rated Thermal Current
A
6
6
Rated Current (AC-15)                        at 220v AC
                                                            at 220v AC
                      (DC-13)                         at 220v AC
A
A
A
1.64
0.95
0.15
1.64
0.95
0.15
Auxlliay Terminal
Sq. mm
2x2.5
2x2.5
Weight/Dimension
O/L relay auto / Manual reset TypeElectronic
Type kg WxHxD Type kg WxHxD
RT21 0.156 47x66x94 RT11 0.127 45x56x91
RT22 0.217 59x78x94 RT12 0.358 63.5x73x118
RT23 0.433 55x83x114 RT13 0.364 63.5x73x118
Electronic Overload Relay
Oveload Relay
Type
Electronic
Type of Reset
Manual
Current Range
A
30-630
Rated Insulation Voltage(Ui)
V
1000
Rated Operational Voltage (Ue)
V
415
Rated Frequency
Hz
50/60
Power terminal Connection
 
Width of Terminal lug
mm
20
Clamping screw
 
M8
Tightening Torque
Nm
18
Trip Indication
 
On relay front
Test function
 
On relay front
Stop Function
 
Through Stop push button
Tripping Limit
 
No Trip
 
1.05 In
Trip
 
1.2 In
Sensitivity to Single Phasing
 
yes
current Adjustment
 
Setting dial on relay front
Security Sealing
 
yes
Wieght/Dimension
Manual reset
Type kg WxHxD
ERT1 4A 0.885 115x96x123.5
ERT1 4B 0.900 115x96x123.5
ERT1 4C 0.900 115x96x123.5
ERT1 4D 0.885 115x96x123.5
ERT1 5E 0.950 120x101x123.5
ERT1 6F 2.320 150x136.8x127.6
ERT1 6G 2.320 150x136.8x127.6
ERT1 6H 4.160 150x136.8x127.6

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