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Products I Monitoring Relays I S2 CMR3

  Earth fault/Ground fault monitoring of 3 phase systems,
  Microcontroller based design,
  SMD technology, Manual Reset,
  Input 1A or 5A through CBCT,
  Adjustable earth fault trip setting,
  Adjustable trip delay & ON delay,
  2 CO relay output
  Failsafe-non-failsafe seletable
Supply Voltage
  System : 100-120/220-240/380-440 V AC ± 20%, 48-63 Hz
  Auxillary : 100-120/220 -240 V AC / 24V DC ± 20%

Ext. Input   1 A or 5 A (Selectable) CBCT

Output Contacts : 2 CO

Trip Setting    
  EF Trip Setting : 10% - 100% of Rated Current Input (Variable)
(Input through CT of 1AMP or 5AMP Secondary)
  Under Current : N.A.
  Over Current : N.A.

Power On Delay : 1-10 Sec. (Adjustable)

Trip Time Delay : 0.1-1 Sec. (Adjustable)

Resetting : Manual

Weight : 140 gms.

Dimensions (mm)    
  Overall (L x W x D) : 90 x 35 x 60
  Mounting (L x W) : 35 mm rail Mounting

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)
Timing/ Relay logic Diagram

Electrical Connection Diagram


Relay contact position shown in 'Power off' condition
Suitable for following application:
Generator panels
Synchronizing Control Panels
AMF Panels, MCC panels
Air Circuit Breakers (With shunt Trip Coil)
MCCB (With Shunt Trip Coil)
Motor Control Panels


Voltage Monitoring Relays

Current Monitoring Relays

Ground Fault Monitoring Relays

Frequency Monitoring Relays

Power Monitoring Relays

Voltage Scanners and Controllers